Great news! Nuclear is a critical component for the non-carbon energy infrastructure we're building. Yes, it's expensive, but the only way to make it cheaper is to invest in rebuilding the expertise we stupidly threw away over the past 5 decades. Paying for past mistakes always sucks, but it's better than not doing it and digging the hole even deeper.
bryanlarsen · 2h ago
Nuclear is a very poor complement for solar & wind. To complement solar & wind, you need dispatchable power to supply power while the sun isn't shining and the wind isn't blowing.
Most nuclear plants can't do that, they need to run 24/7. Some can, but they're horrendously inefficient and expensive to run that way.
ericd · 2h ago
I thought that they were quite throttleable, and it was because they needed to run near full power to pencil out economically/amortize their huge capex - that their fuel costs are relatively insignificant by comparison. Is that not the case?
bryanlarsen · 2h ago
Yes, that's what I meant by "but they're horrendously inefficient and expensive to run that way."
seanmcdirmid · 2h ago
Ya, fuel (uranium) is cheap, capital expenditures are not, so it makes sense to just run it at full bore all the time, even if you could bring it up and down quickly (which you really can’t).
preisschild · 2h ago
Yes, they definitely can do load following.
FuriouslyAdrift · 2h ago
You need continuous baseband generation to keep an electrical grid stable.
If not nuclear, then it's going to be coal, gas, hydro, etc. Of the list, nuclear is the cleanest and least ecologicially destructive (by far).
bryanlarsen · 2h ago
DC power sources (aka batteries) with smart inverters are the cheapest and fastest sources of grid stability in 2025t.
FuriouslyAdrift · 57m ago
The largest battery storage system in use today is 2 orders of magnitude too small to even handle it's local baseband, covers 22 acres, and has already caught fire once. Batteries are decades away from large scale usage.
Scale is what will nail you... every time.
pjc50 · 2h ago
Not necessarily true if you have enough storage AND your renewables have grid-forming inverters. That may be quite a lot of storage.
> least ecologicially destructive (by far)
On average. The long tail doesn't look so great.
FuriouslyAdrift · 55m ago
Hydro is the most ecologically damaging for the site (it tends to wipe out an entire ecosystem for many miles).
As long as you don't care about proliferation danger (by militarizing staff and the site), you can reprocess and burn spent nuclear fuel in breeder reactors/reprocessors.
sxg · 2h ago
Can you clarify? I thought the idea was to run nuclear 24/7 to provide a steady, base rate of power while solar and wind provide complementary power that can be quickly ramped up or down.
bryanlarsen · 2h ago
If you need something to supply power when the sun isn't shining and the wind isn't blowing, you need it to supply peak power needs, not base power needs. And if nuclear can supply peak power needs, then you might as well just have a grid that is 100% nuclear.
If nuclear can't supply peak power needs, then you need batteries or something else to do that. And if you're using batteries, it's a lot cheaper to charge them with solar than with nuclear.
preisschild · 2h ago
You are not thinking about the big picture.
If just running nuclear power plants 24/7 is cheaper than running Solar/Wind when the weather is perfect and backup/storage when not, then why should we scale solar/wind up that much to begin with?
bryanlarsen · 2h ago
> If just running nuclear power plants 24/7 is cheaper
It's not cheaper, it's about 20x as expensive. Running nuclear intermittently is more than 20x as expensive.
throw0101c · 14m ago
> It's not cheaper, it's about 20x as expensive.
Not according to the Ontario Energy Board, which sets wholesale rates; see Table 2:
> you need dispatchable power to supply power while the sun isn't shining and the wind isn't blowing
Fair. What do you suggest instead?
bryanlarsen · 2h ago
For New York State, right next door to the Hydro electricity abundant Quebec, and with access to trade winds in the Atlantic Ocean? Solar, Wind & Batteries for 97% of power, send the excess to Quebec so they can idle their Hydro while the sun is shining, and then use Quebec Hydro for the last 3%.
What benefit does Quebec get from idling their hydro power?
bryanlarsen · 2h ago
They idle it while the sun is shining and power is almost worthless, and sell it while it isn't and prices are high.
zdragnar · 1h ago
Idling a hydro plant doesn't save them money, though. They're designed for efficient operation, and idling will actually induce more strain on the equipment.
There's just no motivation for them to take the excess energy by throttling their own.
throw0101c · 11m ago
> Idling a hydro plant doesn't save them money, though.
When you're running you more create wear-and-tear and increase the depreciation rate: this can be costed. There's also probably increased staffing costs during higher levels of operations; also costable.
Depending on the prices offered to the hydro-plant, it may or may not be profitable to run.
bryanlarsen · 1h ago
We're comparing to nuclear here. Yes, it might cost more money to run a hydro plant intermittently. It'll still be cheaper than nuclear.
thinkingtoilet · 2h ago
Is it critical these days? I am by no means against nuclear energy, and if we had been building reactors these last 50 years the world would be a better place. With things like solar, wind, geo-thermal, etc... is it still smart to invest this much money into nuclear power? Wouldn't it be better to invest in solar at this point?
coldpie · 2h ago
I have yet to see a convincing analysis that renewables+storage can cost-effectively power all the homes in Minnesota, where I live, through our 4+ month-long winters. The days get very short, the Earth tilts away from the sun, cloud-cover and snowfall is frequent, and going 24+ hours without power for heat can be fatal, not just inconvenient.
I'd welcome someone to try to run the numbers on this. I tried myself, but I just don't have the expertise. Don't forget to account for almost all of our current heating coming from natural gas burned on-premise. Then, expand your analysis to include all buildings in all northern climes. Is there even enough materials on the planet to build all those batteries? Do batteries even work at -40 degrees? And that's just one set of challenges, every area has similar but different problems for renewables to tackle.
The answer is both: put huge money into renewables and into nuclear. Nuclear is a proven tech. It works. We understand it. We stupidly threw away all of our skill to build it, and put up huge regulatory roadblocks. But those are solvable human problems, if we care to do it.
Storage for renewables is still a huge question mark, which we should also dump a ton of money into, but we need a solution today. Nuclear is here.
pedrocr · 2h ago
Why would you model Minnesota specifically when that state is part of a larger region that can tradeoff power over time? Canada's hydro is much more "here" than the hypothetical new nuclear plants Minnesota would have to build.
Splitting up the world in areas and then claiming you need to solve a different problem in each is throwing away probably the most cost effective way to get cheaper energy, more grid interconnection and more price mechanisms to shape supply and demand.
coldpie · 2h ago
I admit this is a poor and hand-wavey response, but I'll try anyway. If we agree that solar+storage is off the table, then the question is what should we build instead? And I would guess that the people who make these decisions do consider hydro and importing power, but still decide that nuclear is the right answer. Given they're the experts and have all the info, and I don't, I'd defer to them in deciding what the best option is given all the inputs. As an example of downsides for Canadian hydro power, I would be thinking about our current geopolitical nonsense, and also transmission losses. Perhaps nuclear is the winner when you account for those? But like I said, I don't know.
pedrocr · 2h ago
I'm confused. Who has agreed that solar+wind is off the table? Approximately no one has effectively decided nuclear is the right answer for a long time. If the proof is in what the market is actually building, solar and wind are the winners by huge margins.
What's commonly done in these arguments, and you did some of that, is declare that from first principles nuclear is the solution and we aren't only doing it for other reasons. Yet while there are plenty of simulations of doing full grids with only solar, wind and batteries there's never one where a full nuclear roll-out actually makes sense economically.
coldpie · 1h ago
> I'm confused. Who has agreed that solar+wind is off the table?
Ah okay! That's our disconnect. Do go run the numbers on how much natural gas we're burning up here. It's a lot, like seriously a lot. How many batteries will we need to ensure that amount of energy is available for (say) 2 weeks of continuous cloud cover at -10 ~ -40 degrees F? Keep in mind that if it fails, people will die. I don't feel confident enough in my own analysis to share it, but do try it out yourself for an exercise. It's pretty eye-opening.
> Yet while there are plenty of simulations of doing full grids with only solar, wind and batteries
I would love to see this! Can you share some? Do they account for converting Minnesota's heating needs from natural gas?
pedrocr · 1h ago
You're again talking about simulating only Minnesota I suspect. If you want a realistic simulation there are others in the thread and RethinkX has had a whole-US simulation for a long time. What I've never seen is a nuclear roll-out simulation that argues that's a good option. Do you have one of those?
coldpie · 1h ago
> What I've never seen is a nuclear roll-out simulation that argues that's a good option. Do you have one of those?
I don't know what a "nuclear roll-out simulation" is, exactly. As stated earlier, my position is that we should be building both nuclear and renewables. We should build whatever makes sense for the area in question. If renewable+storage can solve all of an area's needs, then that's fantastic and we should absolutely do that.
If I understand right, you are arguing we should not be building any nuclear, even in Minnesota. I'm unconvinced that renewables+storage alone can solve the Minnesota winter problem. I'm asking if you can provide a link to an analysis showing that we can feasibly and cost-effectively solve the Minnesota winter problem without any nuclear power. Can you please link to one?
pedrocr · 42m ago
> I don't know what a "nuclear roll-out simulation" is, exactly.
Any simulation where building nuclear power plants makes economic sense would do.
> I'm unconvinced that renewables+storage alone can solve the Minnesota winter problem.
You're again asking for simulations about Minnesota specifically which doesn't make sense. Unless you're thinking of seceding from the union and closing the borders to energy trade, as long as the US as a whole can do it Minnesota in particular can be a net energy importer in winter if that's what's needed. Here's the RethinkX simulation of that:
"Our analysis makes severely constraining assumptions, and by extrapolating our results from California, Texas, and New England to the entire country we find that the continental United States as
a whole could achieve 100% clean electricity from solar PV, onshore wind power, and lithium-ion batteries by 2030 for a capital investment
of less than $2 trillion, with an average system electricity cost
nationwide of under 3 cents per kilowatt-hour if 50% or more of the
system’s super power is utilized."
This is almost 5 years old at this point. Others have linked other such analysis. At this point asking people to show them simulations for renewables while trying to argue for nuclear is disingenuous. Renewables are the ones being built out at scale all over the world while nuclear struggles to deliver new projects and doesn't seem to have a viable path to being cheap.
coldpie · 21m ago
> You're again asking for simulations about Minnesota specifically which doesn't make sense.
No I'm not, I have no idea how you are getting that idea. I'm asking for an analysis showing that Minnesota's winter needs can be met without building nuclear plants. That's it. You can solve that problem in any way you like, including importing power from other states and nations.
> Here's the RethinkX simulation of that
Thanks for the link. I focused on the New England scenario, as it's the most similar to Minnesota of the 3 scenarios. It doesn't seem to account for heating. This is the problem I keep coming to in these analyses. See page 25:
> Our model takes as inputs each region’s historical hourly electricity demand ... For the New England region, our analysis applies to the ISO New England (ISO-NE) service area which provides 100% of grid-scale electricity generation for the states of Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.
Our heating is not supplied by electricity. I definitely believe that our current electricity demand may be met by renewables in a feasible timescale, but that leaves out the massive hole of heating our buildings.
The only reference I could find to New England's heating is this little note at the bottom of page 46:
> If New England chose to invest in an additional 20% in its 100% SWB system, for example, then the super power output could be used to replace most fossil fuel use in the residential and road transportation sectors combined (assuming electrification of vehicles and heating).
But I don't see any actual numerical analysis backing this up. Given their analysis earlier only spoke about electricity usage, I'm not super convinced by this one sentence.
Additionally, the New England scenario suggests they need 1,232 GWh of storage to supply only 89 hours of electricity for the area. Even if we agree that's a sufficient amount of time, the currently largest energy storage facility on the planet is only 3 GWh[1]. We would need 410 such facilities for New England alone. Can we really scale battery tech up that much, especially given resource constraints like Lithium and copper? Maybe! Hopefully! But it's a big question. Meanwhile, nuclear is here now, and it works. I don't think we should be betting our future on unproven tech.
> No I'm not, I have no idea how you are getting that idea. I'm asking for an analysis showing that Minnesota's winter needs can be met without building nuclear plants. That's it. You can solve that problem in any way you like, including importing power from other states and nations.
If that's your assumption then this is a non issue. Minnesota is currently less than 2% of total winter electricity demand in the US. Lets be pessimistic and assume that because it needs more heating in winter than average those 2% become 5% with electrification of heating nationwide. Even if 100% of that electricity needed to be imported from other states that's still a very small amount of the total. You could import all that solar and wind energy from other states if you can't produce any at all locally. The scenario is obviously much better than that, you'd only need to cover the shortfall which is what already naturally happens in joint grids all over the world.
> Meanwhile, nuclear is here now, and it works. I don't think we should be betting our future on unproven tech.
I'm still waiting for a link that shows that nuclear can be built at anything approaching reasonable cost. In all these discussions that's always presented as a given and then all the discussion is on the shortfalls of renewables. Meanwhile the actual reality on the ground is that the renewable roll-out is rising exponentially and nuclear projects are practically non existant.
PaulHoule · 1h ago
Solar + storage has to buffer three kinds of variation:
(1) Diurnal. You need to store maybe 12 hours of production to get through the night. It's believable that this could be affordable with batteries.
(2) Seasonal. In a place like Minnesota you either need to overbuild solar panels by a factor of 3 or so, or you need a lot of storage, probably not batteries, but maybe some kind of chemical or thermal storage. Casey Handmer would point out that you could use excess energy in the summer for industrial activities but that could be easier said than done because the capital cost of a factory that runs 1/3 of the time is 3x that of one that runs all the time.
(3) Dunkelflaut. Sometimes you have a rough patch of cloudy weather and little wind, so the requirements are worse than (1).
It's rare to see credible analysis of the grid-scale cost of a solar + storage system because of (3) -- you can quote a reasonable price for batteries that will supply power "almost" all the time, but costs rise explosively as you increase "almost". With different requirements for reliability the cost of a storage-based system could be "a bit less" than "nuclear power plants built without bungling" or it could be much more. It also has to vary with your location though people talking about the subject don't seem to talk about that which contributes to people talking past each other. (In upstate NY I could care less about Arizona)
The cheapest grid is 90-97% renewable (depending on location) in 2025. As battery prices go down, that number gets higher.
FuriouslyAdrift · 2h ago
Minnesota has 8 hydro plants already... in addition to 2 nuclear plants and a host of coal, gas, solar, wind, etc.
They generate 57 Twh right now. That's about 10% of the current production of the entire nation of Canada just for one US state.
I think you are greatly underestimating the scale of the United States compared to Canada.
pedrocr · 2h ago
Canada isn't small, it produces almost 10x the electrical energy that Minnesota does. But I wasn't even giving it as an example of total capacity just of a neighbor that has a bunch of hydro that can be useful in some moments. And it works both ways too. When Minnesota has excess wind Canada can benefit. The same exercise needs to be modelled with all demand and capacity within viable transmission range. And with the advancements in HVDC that range keeps increasing.
jvanderbot · 1h ago
Expand the analysis to anyone above 40deg latitude with wintertime average temperature below freezing. Show your work. That's fine.
40deg lat includes a _lot_ of the world.
fred_is_fred · 1h ago
How do you handle growth in demand over time? Anywhere with good economics to build hydro has been done before.
ericd · 2h ago
Yeah, it's pretty eye opening to see how much more power our home's solar array puts out during the summer vs. the winter. It's like 3-4x, on average, while our power demand is actually highest in winter, due to the higher deltas between outdoor temps and reasonable indoor temps. As we shift more and more heating to electric heat pump, base load power capability is going to become more and more important.
And yeah, we need to decarbonize ASAP.
micromacrofoot · 2h ago
The minnesota problem always comes up in this discussion and realistically if we replaced all viable capacity outside of cold dark areas of the world it would be fine to continue burning gas there, we're not even close to renewable saturation to even think about minnesota
jvanderbot · 2h ago
So, the entire nation of Canada gets a free pass to burn all the gas they want?
And Russia? And the northern EU? And many parts of China, Japan, northern US (NYC!? Buffalo?). Northern Italy, Germany, Switzerland? Does everyone who dips below 0 deg F get to burn gas? -10F? If the infra remains in place with that kind of demand, don't you see the costs being low enough that people elsewhere will want to do that rather than transition to carbon-free for the fun of it?
It's hand waved away like this, but did anyone do the analysis as suggested? My guess is the results will not be as easy to wave away as you suggest. But OTOH, maybe heat pumps + overcapacity solar arrays will do it. Who knows?
micromacrofoot · 1h ago
I'm not sure why I have to repeat myself, but yes, if we had 100% capacity for renewables in non-cold areas (which we're not even close to, even 80% would be miraculous) we would have decades of more time to solve these issues in cold areas. They don't have to be of equal priority.
We could ignore them completely and focus on the most viable areas and have years and years of work to be done. We are not building nearly as fast as we should.
Minnesota, Russia, Buffalo, et al are not a reason to delay significantly ramping up renewables in other places.
This is not a worthwhile subject to discuss in this context. It's rearranging the deck chairs on the titanic.
jvanderbot · 1h ago
You have to repeat yourself because you're adding information when you state it again. Compare:
> if we replaced all viable capacity outside of cold dark areas of the world it would be fine to continue burning gas there
with
> we would have decades of more time to solve these issues in cold areas
As in: Ignore vs Delay. It's clear in hindsight, but wasn't on first reading.
micromacrofoot · 1h ago
ignore vs delay is irrelevant, if saying "lets ignore it forever" lets us build capacity in other areas faster then let's say "lets ignore it forever"
the point is that it's not a problem that should slow down adoption of renewables everywhere else, we don't need to debate nuclear vs renewables because of cold while non-cold areas are still burning tons of fossil fuels constantly
saying "but what about cold!" only serves to add further fuel to the constant drag created by the fossil fuel industry, they love these arguments because it sows consumer doubt — they go as far as to fund anti-renewable activism under the guise of environmentalism to a similar effect
coldpie · 1h ago
> Minnesota, Russia, Buffalo, et al are not a reason to delay significantly ramping up renewables in other places.
Wait, what? Who in this discussion suggested it was?
jvanderbot · 1h ago
Nobody did. GP is dodging the question of what to do in MN by saying it's not important and might require future tech.
Edit: it's less important to worry about that at the moment.
micromacrofoot · 1h ago
it's not important right now and if we accelerate building renewables elsewhere we may find that it's never important
jvanderbot · 22m ago
It makes sense but triggers false dichotomy antibodies and dodges the question OP had, that's all.
coldpie · 57m ago
Is your argument that new generation capacity in cold climates should be built with fossil fuel plants because it's cheaper, and the saved funds should be directed to areas that are more friendly to renewables?
coldpie · 2h ago
Well, our power needs are going up, and so we have to build new capacity. The question is what to build? These make for interesting discussions because there are many options on the table for places like Minnesota. No one's discussing the article about Texas's 500th successful solar farm deployment :)
pjc50 · 2h ago
I'd like to reverse the location specific question and ask: what is the correct number of nuclear reactors for Iran to have?
PaulHoule · 1h ago
LWRs don't need weapons grade uranium and don't produce weapons grade plutonium. Iran could have civil nuclear energy and not have a nuclear weapons program.
coldpie · 2h ago
Huh? This seems like a non-sequitur, but if you want the answer I guess you'd want to ask someone familiar with Iranian weather patterns, which ain't me.
horsawlarway · 2h ago
I think solar plus storage will likely be the better play.
I think nuclear is a thing we should have done fifty years ago in spades.
I'm not sure it's a thing we should do today when the economics behind solar are just so, so much stronger.
I'd really love to see this investment go to storage projects instead.
Battery tech finally seems to be moving, and I'd like to see the US be able to make plays on the LFP/Sodium battery fronts far more than I want overpriced power from nuclear.
zbrozek · 2h ago
I suspect solar + batteries will be dominant (but should not be the exclusive source) in places which get relatively good sun even in the winter. California and Hawaii, for example, will do pretty well with a mix that is heavy on those technologies. But if you're in North Dakota or Alaska and want to electrify your grid, you might not have a good time in December and January.
There's arguments to be made about having more transmission so you can move electricity from one place to another, but that's also expensive and difficult to build and comes with downsides like vulnerability to natural disasters and attack along a much longer path. Or, as in California, the transmission is its own latent source of disaster that can immolate the state.
belorn · 2h ago
It is always good to look at current grids and prices to see how things are. In Sweden, the sunny days around may-juli have made those months almost free. Solar and the reduced need for heating, in combination of very limited use of AC, means that you don't need much beyond solar, wind and some base load from nuclear/hydro power. I contrast, 75% of the yearly energy bill comes from the 3 winter months, where solar has around 10% (and often less) of the generative capacity. This mean that the energy bill is very variable, and bad weather during those few critical months will results in unreasonable bills (as in bankruptcies and voters that ask the government for bailout).
Under market forces, the electric company have no quarrel in sending people a bill that is 12 times the average month for a single month. There is also very luke warm interest in reducing the cost for the consumer by building out storage. The economics has so far not been that great outside of using government subsidizes, and as northvolt demonstrated, not that interested in using loans when the subsidizes run out.
That said, the Finish project of storing hot water for district heating looks like one of the more interesting storage solution. They are also investing into nuclear, so it seems like time will show how the economics will pan out. Heat exchangers are very effective at generating heat for district heating, so the heat storage has some steep competition.
jacobr1 · 44m ago
Side consideration - my local utility has a program (targeted at lower income households - but there is no restriction on who can enroll) that average out the annual costs. For the first year they look at your total annual cost and divide by 12 for a flat monthly. Every year after that, they also true it up with cred/debit on the difference. For example if they overcharged by $120, they will take the average and then subtract $10 for the new, adjusted monthly bill that resets annually. I still look at the bills since I'm interested in their benchmarking data on how much power I'm using relative to the community - but I don't really need to care about seasonal fluctuation.
hshdhdhj4444 · 1h ago
If one were cynical one would wonder why the push for directing resources towards nuclear energy right when solar and wind are not just significantly cheaper than nuclear but also cheaper than fossil fuels.
If one were not being cynical it makes sense to some degree in order to simply diversify our non fossil fuel energy sources.
An all of the above approach to decarbonizing makes sense, and nuclear will be a useful part of that.
zbrozek · 2h ago
I'm not an expert, but I suspect there will be a few driving use cases. Electrifying places far from the equator means heat pumps and/or district heating and providing for their power demand in the dark. In some places wind can do that, but not everywhere.
There are also loads that want very large, high-availability power and/or process heat. Reactors would pair well with things like metal refining or electrolysis to get the hydrogen for ammonia production.
At the end of the day, there's never one source of energy which is a silver bullet for everything and the best approach is probably a diverse mix of supply.
zdragnar · 2h ago
Electrifying heat far away from the equator is challenging. My area is largely heated by natural gas furnaces. During a cycle called a polar vortex, the utility company sent out a call to people to lower their thermostats because they were struggling to keep the lines pressurized with how much demand there was.
The wind chill would drop below -40 most nights, sometimes significantly lower. Wind power won't help much because they need to shut down at the worst times- either too windy or icy.
As much as I love heat pumps, having thousands upon thousands of homes switching to resistive heating because the pumps can't keep up in the evening is going to get ugly.
District heating won't save you; the metro doesn't actually burn enough stuff to heat the cities and a significant part of the population is in semi or very rural areas that wouldn't benefit anyway.
Edit: that same metro just put together a fund to renovate a few blocks of an underserved area. It's in the millions of dollars. I can't imagine the cost of converting the entire area to district heating; it would surely eclipse the entire government budget. This is the sort of thing that will only happen if you have the kind of fiat power of an imaginary wand.
SoftTalker · 2h ago
The unsolved problem with solar and wind is storage. You still need electricity at night or when the wind isn't blowing.
croes · 2h ago
It was never cheap even with the expertise and such a kind of centralized energy generation is a bad idea.
PaulHoule · 2h ago
It's easy to say but not so easy to do.
The two Western designs built in the last generation are the EPR and the AP1000. The EPR is so unconstructable that it could have been designed by Amory Lovins to put the nails in the coffin of nuclear power. The supply chain for the AP1000 is centered in China. If it wasn't for problems of war and peace the rational thing to do might be ask the Russians to come in and built a VVER.
GE is pushing the BWRX300 which might get some cost reductions because it doesn't need a steam generator, but the small size doesn't help the economics and the cost numbers they are talking about are amazingly low.
throw0101c · 5m ago
> The supply chain for the AP1000 is centered in China.
Vogtle Units 3 and 4 started a supply chain in the US. Especially Unit 3, which is one of the reasons it was so expensive: a lot of things had to be learned. Unit 4 was (IIRC) 30% cheaper than Unit 3 because a bit of a workflow was developed.
Any future US AP1000 units should be better than Vogtle—if people don't try to re-invent the wheel and use the same trail used in that project.
mrbluecoat · 2h ago
Let's hope the plan incorporates cutting-edge advancements, like molten salt and liquid thorium designs..
I'm also hopeful there's a resurgence of interest in Small Modular Reactors (SMRs).
throw0101c · 1m ago
> Let's hope the plan incorporates cutting-edge advancements, like molten salt and liquid thorium designs..
Let's hope not. At least not for the first few new nuclear plants.
There is a lot of operating experience with 'traditional' designs and lessons learned over the decade. There are also new lessons learned with the Vogtle AP1000s. Any new construction (in the US) should be AP1000s to take advantage of those lessons.
Once people are familiar nuclear again then perhaps look at different designs. But you should learn to crawl and walk before trying to run.
(A lot of nuclear construction is the civil works, and is the same for any type of design, and getting that down to cookie cutter output would help any different designs as well.)
PaulHoule · 2h ago
People forget that we quit building coal burning power plants at the same time we quit building nukes... For the same reason. The capital cost of the steam turbine is atrocious.
Molten salt, HTGR and LMFBR designs could all be coupled to a supercritical-CO2 powerset which would fit in the employee break room of the turbine hall of an LWR. The steam generators for a PWR are larger than the reactor vessel itself, but a higher temperature reactor could miniaturize them [1].
You still see old literature that claims the LMFBR has a higher capital cost than the LWR but a lot of that comes from the expensive powerset and heat exchangers which have to be doubled to prevent a water-sodium reaction in the primary loop.
So yeah, 4th generation reactors could be a revolution but they are not a bird in the hand and it won't be a matter of "we'll write a check to build a 1 GW reactor" whether you are New York State or Google, it will be matter of "we'll build a test reactor" and it could be another 15 years at least before we get to the TRL 7 stage.
but terribly uneconomical. Optimizing economics is about optimizing power output from a given volume of pressure vessel. The power of a nuclear reactor is limited by the ability to get heat out of the fuel rods and into the coolant so good economics requires producing energy evenly throughout the whole core, which commercial reactors do and submarine reactors do not.
Submarine reactors are worth it, however, because being able to go around the world over and over again without surfacing is of great military value. It's insane how fast a nuclear aircraft carrier can travel, there's enough uncertainty over where it will be in 15 minutes that an attack with a reasonably sized nuclear warhead could fail to kill it so, so china developed maneuverable hypersonic weapons that could punch a hole in the deck with a conventional weapon
If nuclear is going to work, it cannot be commercial. The economics won't work out. It has to be federally owned and operated (preferably by military staff so they are under UCMJ) and run as a public good and not for profit.
SoftTalker · 2h ago
Smaller scale can make construction more practical though, even if the economics are worse than the theoretical best. Billions have been lost on unfinished large-scale nuke plants more than once, because they take too long, are too complex, and get more and more mired in politics as the years drag out. A small plant that could be online in months or at most a year or two from start of construction is way more pragmatic.
PaulHoule · 2h ago
The concrete benefit I see for the small LWR is this: it is possible to build a pressure vessel by welding segments together but most economical to build one in a superheavy forge that can pound one out of a single piece of steel. There are no superheavy forges in North America (although there are many in various Asian and European countries) although the BWRX300 is small enough that it can be made in Canada.
As for simpler construction it has to be proven. The AP1000 was a "modular reactor" in that they tried to make it out of large modules that could be built in a factory and stuck together on site. The factories struggled to make those modules and when they arrived they often needed major rework. The ACP100 was recently completed in China
and press releases boasted that it was one of the most complex construction projects of all time -- what I wanted to hear was "this is one of the most simple construction projects of all time!"
jltsiren · 1h ago
Finland tried the VVER option as well, and it was even worse than EPR. Between 2013 and 2022, the Russians proved incapable of providing sufficient documentation that a construction permit could be issued.
Workaccount2 · 2h ago
There is almost no way this doesn't end up wasting an enormous amount of money, while only having a slim chance of ever coming online, while only having a slim chance of actually lowering energy costs.
If you are gonna blow $10 Billion on a 10 year nightmare project, just buy a ton of solar, wind, and batteries to get 2GW in 5 years.
fsckboy · 2h ago
>actually lowering energy costs
isn't green energy worth higher energy costs?
evklein · 2h ago
Additionally, renewables have their own drawbacks - their volatility makes reliability more challenging and thus brings energy prices higher. Nuclear has the benefit of providing consistent base load, something that's needed more now than ever. That kind of thing might be worth the investment, but until now no one has wanted to put up the kind of money needed for that level of reliability.
Workaccount2 · 2h ago
In a state the size of New York, the sun is always shining or the wind always blowing somewhere in the state. You then use battery back-up to fill the gaps and gas to fill the gaps of the filled gaps.
The latest nuclear plant in the US was the completion of the Vogtle plant in Georgia, which ran a staggering $22B over budget. Twenty Two Billion Dollars over budget!
$22B, is enough to build the largest solar plant in the US 10 times over (total 5GW). Or about 7 of the largest wind farm (total 10.5GW). Or 33 of the largest battery storage plant. With $2B left over for logistics.
And $14B left over for anything else because the total cost was $36B!
The current state of nuclear doesn't make sense anyway you cut it.
bryanlarsen · 2h ago
Perhaps, but we don't need to and shouldn't pay more for green energy.
In 2025 the cheapest 24/7 energy grid is 90% green, up to 97% green in sunny locations.
tl;dr it was commissioned, constructed, and closed due to local safety concerns in the wake of the Three Mile Island accident.
Interesting excerpt from the wiki:
In 2004, the Long Island Power Authority erected two 100-foot, 50 kW wind turbines at the Shoreham Energy Center site,[18] as part of a renewable-energy program.[19][20] At a ceremony, chairman Kessel stated, "We stand in the shadow of a modern-day Stonehenge, a multibillion-dollar monument to a failed energy policy, to formally commission the operation of a renewable energy technology that will harness the power of the wind for the benefit of Long Island's environment." The turbines generate 200 MWh per year, or 1/35,000th of the energy the nuclear plant would have produced.[21]
ecshafer · 2h ago
I am hoping they build this in Oswego on top of the other reactors being built in 9 mile. Lake Ontario has an inexhaustible amount of cold water, and there's plenty of space up there.
kevin_thibedeau · 2h ago
This needs to be in Western New York. The existing plant for the region is operating on an an extension that expires the earliest of the bunch in 2029. When it goes, electricity rates are going to skyrocket without a replacement.
ecshafer · 2h ago
Ill admit I am saying this out of only regional loyalty and have no idea about the status of other plants in upstate NY. I am also not sure on how much the power generated in Upstate NY goes to say Toronto vs NYC, and how much that reactor being in Buffalo or Rochester would even matter for that vs Oswego being 100 miles closer to NYC.
amanaplanacanal · 3h ago
Why wouldn't the governor solicit bids for energy, and let the companies that actually build and run generation capacity decide the cheapest way to do that? Having the governor choose seems weird to me.
belorn · 2h ago
Technology neutrality is fairly important. The role of the government should be in controlling the requirements which has a collective/social cost, like emissions, grid stability and price variability (as those are things that voters will demand from the government, as has been demonstrated in EU during the energy crisis). As long any company is willing to provide similar services under similar requirements, what technology they choose to use may be better determined by market forces rather than political choices.
What they should not do however is to simply look at potential generation capacity and have that be the only important criteria. Voters has clearly demonstrated that they will vote for politicians that can promise stable grid and stable pricing, rather than having those being controlled by the market.
coldpie · 2h ago
The market is famously terrible at pricing in externalities and accounting for long-term needs. I think if you used the government to force bidders to account for those, you'd just end up in the same place.
amanaplanacanal · 1h ago
You might, or you might not. You might end up with tidal or wave, or wind+batteries, or something else. Tying yourself to something that's going to take decades and almost certainly include big cost overruns seems like a terrible idea.
cool_dude85 · 2h ago
Not an unreasonable choice if externalities such as carbon (and mining, etc. in the case of nuclear) are taken into account. And suppose you price carbon in, how do you actually produce a real carbon sink at the assumed cost and scale if nat gas wins the bid?
zamadatix · 2h ago
NYPA does build and run generation capacity, it's just the state owned utility. Besides, this is a policy and strategy push instead of a lowest-bidder ask.
LeafItAlone · 2h ago
Are you suggesting letting private companies whose entire purpose is to make the most amount of profit for their shareholders to be the ones that decide what is best for the people of the state?
Workaccount2 · 2h ago
Because it would be natural gas.
amanaplanacanal · 1h ago
I keep hearing that solar and wind are the cheapest sources of new energy. Why would it be natural gas?
And for that matter, if you are worried about CO2 emissions, you could make that be part of the requirements.
Workaccount2 · 51m ago
Solar and wind are cheapest when installed in ideal locations with ideal parts.
Gas is a bit more expensive than the ideal green model, but cheaper on average. It also can be built anywhere on a comparatively small land parcel, and can provide easily scalable energy 24/7/365.
idiotsecant · 3h ago
We will see. It's unfortunate but there is a long list of attempted nuke construction that ends up billions of dollars in the hole before the first mwh is made.
cool_dude85 · 3h ago
And, funny enough, often the utility company can raise rates to cover these losses! Easy money and you don't have to build a thing.
Archelaos · 2h ago
And if companies were obliged to insure their power plants properly, it would cost many, many billions more. It is the same old story: socialise risks and privatise profits.
1970-01-01 · 2h ago
... because AI.
Love it or hate it, the AI hype has at least lit a fire on nuclear power. If AI winter comes, we at least get to keep the powerplants and receive clean power for decades.
dragonwriter · 2h ago
> If AI winter comes, we at least get to keep the powerplants and receive clean power for decades.
When the AI winter comes, it’s not going to mean the energy devoted to AI applications decreases, it’ll mean the perception of rapid future expansion in profits fueling VC interest in AI goes away. It’s not like we cut back the aggregate energy cohsumption of systems running, say, rule-based expert systems during the last AI winter.
pjc50 · 2h ago
> If AI winter comes
But what happens to the AI in the nuclear winter?
nxm · 3h ago
“Bowing to anti-nuclear fears, New York chose to shut down a reliable and safe source of energy—and now burns more fossil fuels than before.”
perihelions · 2h ago
The same far-sighted leaders who permanently shuttered 2 GW of nuclear power, in a time of low electricity prices, would like credit, please, for their aspirational concept of a plan for building 1 GW of nuclear. To alleviate high electricity prices.
cbm-vic-20 · 2h ago
The article is paywalled, presumably the reactor they're referring to is
"New York City's greenhouse gas emissions from electricity have increased from approximately 500 to 900 tons of CO2 per MWh from 2019 to 2022 as a result of the closure."
calvinmorrison · 2h ago
my grandma lived by the old plant, there were sort of endless signs around to get rid of it. now we get another one.
ImHereToVote · 3h ago
I love that nuclear is just far too dangerous when it comes to powering peoples homes. Obsoleting workers with AI however.....
game_the0ry · 1h ago
Could you elaborate with sources?
I suspect much of the perception of nuclear being too dangerous comes from the fossil fuel energy lobby.
Most nuclear plants can't do that, they need to run 24/7. Some can, but they're horrendously inefficient and expensive to run that way.
If not nuclear, then it's going to be coal, gas, hydro, etc. Of the list, nuclear is the cleanest and least ecologicially destructive (by far).
Scale is what will nail you... every time.
> least ecologicially destructive (by far)
On average. The long tail doesn't look so great.
As long as you don't care about proliferation danger (by militarizing staff and the site), you can reprocess and burn spent nuclear fuel in breeder reactors/reprocessors.
If nuclear can't supply peak power needs, then you need batteries or something else to do that. And if you're using batteries, it's a lot cheaper to charge them with solar than with nuclear.
If just running nuclear power plants 24/7 is cheaper than running Solar/Wind when the weather is perfect and backup/storage when not, then why should we scale solar/wind up that much to begin with?
It's not cheaper, it's about 20x as expensive. Running nuclear intermittently is more than 20x as expensive.
Not according to the Ontario Energy Board, which sets wholesale rates; see Table 2:
* https://www.oeb.ca/sites/default/files/rpp-price-report-2024...
Fair. What do you suggest instead?
https://ember-energy.org/latest-insights/solar-electricity-e...
There's just no motivation for them to take the excess energy by throttling their own.
When you're running you more create wear-and-tear and increase the depreciation rate: this can be costed. There's also probably increased staffing costs during higher levels of operations; also costable.
Depending on the prices offered to the hydro-plant, it may or may not be profitable to run.
I'd welcome someone to try to run the numbers on this. I tried myself, but I just don't have the expertise. Don't forget to account for almost all of our current heating coming from natural gas burned on-premise. Then, expand your analysis to include all buildings in all northern climes. Is there even enough materials on the planet to build all those batteries? Do batteries even work at -40 degrees? And that's just one set of challenges, every area has similar but different problems for renewables to tackle.
The answer is both: put huge money into renewables and into nuclear. Nuclear is a proven tech. It works. We understand it. We stupidly threw away all of our skill to build it, and put up huge regulatory roadblocks. But those are solvable human problems, if we care to do it.
Storage for renewables is still a huge question mark, which we should also dump a ton of money into, but we need a solution today. Nuclear is here.
Splitting up the world in areas and then claiming you need to solve a different problem in each is throwing away probably the most cost effective way to get cheaper energy, more grid interconnection and more price mechanisms to shape supply and demand.
What's commonly done in these arguments, and you did some of that, is declare that from first principles nuclear is the solution and we aren't only doing it for other reasons. Yet while there are plenty of simulations of doing full grids with only solar, wind and batteries there's never one where a full nuclear roll-out actually makes sense economically.
Ah okay! That's our disconnect. Do go run the numbers on how much natural gas we're burning up here. It's a lot, like seriously a lot. How many batteries will we need to ensure that amount of energy is available for (say) 2 weeks of continuous cloud cover at -10 ~ -40 degrees F? Keep in mind that if it fails, people will die. I don't feel confident enough in my own analysis to share it, but do try it out yourself for an exercise. It's pretty eye-opening.
> Yet while there are plenty of simulations of doing full grids with only solar, wind and batteries
I would love to see this! Can you share some? Do they account for converting Minnesota's heating needs from natural gas?
I don't know what a "nuclear roll-out simulation" is, exactly. As stated earlier, my position is that we should be building both nuclear and renewables. We should build whatever makes sense for the area in question. If renewable+storage can solve all of an area's needs, then that's fantastic and we should absolutely do that.
If I understand right, you are arguing we should not be building any nuclear, even in Minnesota. I'm unconvinced that renewables+storage alone can solve the Minnesota winter problem. I'm asking if you can provide a link to an analysis showing that we can feasibly and cost-effectively solve the Minnesota winter problem without any nuclear power. Can you please link to one?
Any simulation where building nuclear power plants makes economic sense would do.
> I'm unconvinced that renewables+storage alone can solve the Minnesota winter problem.
You're again asking for simulations about Minnesota specifically which doesn't make sense. Unless you're thinking of seceding from the union and closing the borders to energy trade, as long as the US as a whole can do it Minnesota in particular can be a net energy importer in winter if that's what's needed. Here's the RethinkX simulation of that:
https://www.tonyseba.com/wp-content/uploads/2020/11/Rethinki...
"Our analysis makes severely constraining assumptions, and by extrapolating our results from California, Texas, and New England to the entire country we find that the continental United States as a whole could achieve 100% clean electricity from solar PV, onshore wind power, and lithium-ion batteries by 2030 for a capital investment of less than $2 trillion, with an average system electricity cost nationwide of under 3 cents per kilowatt-hour if 50% or more of the system’s super power is utilized."
This is almost 5 years old at this point. Others have linked other such analysis. At this point asking people to show them simulations for renewables while trying to argue for nuclear is disingenuous. Renewables are the ones being built out at scale all over the world while nuclear struggles to deliver new projects and doesn't seem to have a viable path to being cheap.
No I'm not, I have no idea how you are getting that idea. I'm asking for an analysis showing that Minnesota's winter needs can be met without building nuclear plants. That's it. You can solve that problem in any way you like, including importing power from other states and nations.
> Here's the RethinkX simulation of that
Thanks for the link. I focused on the New England scenario, as it's the most similar to Minnesota of the 3 scenarios. It doesn't seem to account for heating. This is the problem I keep coming to in these analyses. See page 25:
> Our model takes as inputs each region’s historical hourly electricity demand ... For the New England region, our analysis applies to the ISO New England (ISO-NE) service area which provides 100% of grid-scale electricity generation for the states of Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.
Our heating is not supplied by electricity. I definitely believe that our current electricity demand may be met by renewables in a feasible timescale, but that leaves out the massive hole of heating our buildings.
The only reference I could find to New England's heating is this little note at the bottom of page 46:
> If New England chose to invest in an additional 20% in its 100% SWB system, for example, then the super power output could be used to replace most fossil fuel use in the residential and road transportation sectors combined (assuming electrification of vehicles and heating).
But I don't see any actual numerical analysis backing this up. Given their analysis earlier only spoke about electricity usage, I'm not super convinced by this one sentence.
Additionally, the New England scenario suggests they need 1,232 GWh of storage to supply only 89 hours of electricity for the area. Even if we agree that's a sufficient amount of time, the currently largest energy storage facility on the planet is only 3 GWh[1]. We would need 410 such facilities for New England alone. Can we really scale battery tech up that much, especially given resource constraints like Lithium and copper? Maybe! Hopefully! But it's a big question. Meanwhile, nuclear is here now, and it works. I don't think we should be betting our future on unproven tech.
[1] https://electrek.co/2023/08/03/worlds-largest-battery-storag...
If that's your assumption then this is a non issue. Minnesota is currently less than 2% of total winter electricity demand in the US. Lets be pessimistic and assume that because it needs more heating in winter than average those 2% become 5% with electrification of heating nationwide. Even if 100% of that electricity needed to be imported from other states that's still a very small amount of the total. You could import all that solar and wind energy from other states if you can't produce any at all locally. The scenario is obviously much better than that, you'd only need to cover the shortfall which is what already naturally happens in joint grids all over the world.
> Meanwhile, nuclear is here now, and it works. I don't think we should be betting our future on unproven tech.
I'm still waiting for a link that shows that nuclear can be built at anything approaching reasonable cost. In all these discussions that's always presented as a given and then all the discussion is on the shortfalls of renewables. Meanwhile the actual reality on the ground is that the renewable roll-out is rising exponentially and nuclear projects are practically non existant.
(1) Diurnal. You need to store maybe 12 hours of production to get through the night. It's believable that this could be affordable with batteries.
(2) Seasonal. In a place like Minnesota you either need to overbuild solar panels by a factor of 3 or so, or you need a lot of storage, probably not batteries, but maybe some kind of chemical or thermal storage. Casey Handmer would point out that you could use excess energy in the summer for industrial activities but that could be easier said than done because the capital cost of a factory that runs 1/3 of the time is 3x that of one that runs all the time.
(3) Dunkelflaut. Sometimes you have a rough patch of cloudy weather and little wind, so the requirements are worse than (1).
It's rare to see credible analysis of the grid-scale cost of a solar + storage system because of (3) -- you can quote a reasonable price for batteries that will supply power "almost" all the time, but costs rise explosively as you increase "almost". With different requirements for reliability the cost of a storage-based system could be "a bit less" than "nuclear power plants built without bungling" or it could be much more. It also has to vary with your location though people talking about the subject don't seem to talk about that which contributes to people talking past each other. (In upstate NY I could care less about Arizona)
https://ember-energy.org/latest-insights/solar-electricity-e...
The cheapest grid is 90-97% renewable (depending on location) in 2025. As battery prices go down, that number gets higher.
They generate 57 Twh right now. That's about 10% of the current production of the entire nation of Canada just for one US state.
I think you are greatly underestimating the scale of the United States compared to Canada.
40deg lat includes a _lot_ of the world.
And yeah, we need to decarbonize ASAP.
And Russia? And the northern EU? And many parts of China, Japan, northern US (NYC!? Buffalo?). Northern Italy, Germany, Switzerland? Does everyone who dips below 0 deg F get to burn gas? -10F? If the infra remains in place with that kind of demand, don't you see the costs being low enough that people elsewhere will want to do that rather than transition to carbon-free for the fun of it?
It's hand waved away like this, but did anyone do the analysis as suggested? My guess is the results will not be as easy to wave away as you suggest. But OTOH, maybe heat pumps + overcapacity solar arrays will do it. Who knows?
We could ignore them completely and focus on the most viable areas and have years and years of work to be done. We are not building nearly as fast as we should.
Minnesota, Russia, Buffalo, et al are not a reason to delay significantly ramping up renewables in other places.
This is not a worthwhile subject to discuss in this context. It's rearranging the deck chairs on the titanic.
> if we replaced all viable capacity outside of cold dark areas of the world it would be fine to continue burning gas there
with
> we would have decades of more time to solve these issues in cold areas
As in: Ignore vs Delay. It's clear in hindsight, but wasn't on first reading.
the point is that it's not a problem that should slow down adoption of renewables everywhere else, we don't need to debate nuclear vs renewables because of cold while non-cold areas are still burning tons of fossil fuels constantly
saying "but what about cold!" only serves to add further fuel to the constant drag created by the fossil fuel industry, they love these arguments because it sows consumer doubt — they go as far as to fund anti-renewable activism under the guise of environmentalism to a similar effect
Wait, what? Who in this discussion suggested it was?
Edit: it's less important to worry about that at the moment.
I think nuclear is a thing we should have done fifty years ago in spades.
I'm not sure it's a thing we should do today when the economics behind solar are just so, so much stronger.
I'd really love to see this investment go to storage projects instead.
Battery tech finally seems to be moving, and I'd like to see the US be able to make plays on the LFP/Sodium battery fronts far more than I want overpriced power from nuclear.
There's arguments to be made about having more transmission so you can move electricity from one place to another, but that's also expensive and difficult to build and comes with downsides like vulnerability to natural disasters and attack along a much longer path. Or, as in California, the transmission is its own latent source of disaster that can immolate the state.
Under market forces, the electric company have no quarrel in sending people a bill that is 12 times the average month for a single month. There is also very luke warm interest in reducing the cost for the consumer by building out storage. The economics has so far not been that great outside of using government subsidizes, and as northvolt demonstrated, not that interested in using loans when the subsidizes run out.
That said, the Finish project of storing hot water for district heating looks like one of the more interesting storage solution. They are also investing into nuclear, so it seems like time will show how the economics will pan out. Heat exchangers are very effective at generating heat for district heating, so the heat storage has some steep competition.
If one were not being cynical it makes sense to some degree in order to simply diversify our non fossil fuel energy sources.
An all of the above approach to decarbonizing makes sense, and nuclear will be a useful part of that.
There are also loads that want very large, high-availability power and/or process heat. Reactors would pair well with things like metal refining or electrolysis to get the hydrogen for ammonia production.
At the end of the day, there's never one source of energy which is a silver bullet for everything and the best approach is probably a diverse mix of supply.
The wind chill would drop below -40 most nights, sometimes significantly lower. Wind power won't help much because they need to shut down at the worst times- either too windy or icy.
As much as I love heat pumps, having thousands upon thousands of homes switching to resistive heating because the pumps can't keep up in the evening is going to get ugly.
District heating won't save you; the metro doesn't actually burn enough stuff to heat the cities and a significant part of the population is in semi or very rural areas that wouldn't benefit anyway.
Edit: that same metro just put together a fund to renovate a few blocks of an underserved area. It's in the millions of dollars. I can't imagine the cost of converting the entire area to district heating; it would surely eclipse the entire government budget. This is the sort of thing that will only happen if you have the kind of fiat power of an imaginary wand.
The two Western designs built in the last generation are the EPR and the AP1000. The EPR is so unconstructable that it could have been designed by Amory Lovins to put the nails in the coffin of nuclear power. The supply chain for the AP1000 is centered in China. If it wasn't for problems of war and peace the rational thing to do might be ask the Russians to come in and built a VVER.
GE is pushing the BWRX300 which might get some cost reductions because it doesn't need a steam generator, but the small size doesn't help the economics and the cost numbers they are talking about are amazingly low.
Vogtle Units 3 and 4 started a supply chain in the US. Especially Unit 3, which is one of the reasons it was so expensive: a lot of things had to be learned. Unit 4 was (IIRC) 30% cheaper than Unit 3 because a bit of a workflow was developed.
Any future US AP1000 units should be better than Vogtle—if people don't try to re-invent the wheel and use the same trail used in that project.
https://www.livescience.com/technology/engineering/chinese-s...
I'm also hopeful there's a resurgence of interest in Small Modular Reactors (SMRs).
Let's hope not. At least not for the first few new nuclear plants.
There is a lot of operating experience with 'traditional' designs and lessons learned over the decade. There are also new lessons learned with the Vogtle AP1000s. Any new construction (in the US) should be AP1000s to take advantage of those lessons.
Once people are familiar nuclear again then perhaps look at different designs. But you should learn to crawl and walk before trying to run.
(A lot of nuclear construction is the civil works, and is the same for any type of design, and getting that down to cookie cutter output would help any different designs as well.)
Molten salt, HTGR and LMFBR designs could all be coupled to a supercritical-CO2 powerset which would fit in the employee break room of the turbine hall of an LWR. The steam generators for a PWR are larger than the reactor vessel itself, but a higher temperature reactor could miniaturize them [1].
You still see old literature that claims the LMFBR has a higher capital cost than the LWR but a lot of that comes from the expensive powerset and heat exchangers which have to be doubled to prevent a water-sodium reaction in the primary loop.
So yeah, 4th generation reactors could be a revolution but they are not a bird in the hand and it won't be a matter of "we'll write a check to build a 1 GW reactor" whether you are New York State or Google, it will be matter of "we'll build a test reactor" and it could be another 15 years at least before we get to the TRL 7 stage.
[1] https://www.precisionmicro.com/understanding-printed-circuit...
Going smaller and build lots more brings costs down tremendously. Combined with breeder reactors plus reprocessing to deal with waste.
You'd have to miltarize all staff to deal with profilieration risks and then license out delivery to private corps (utility companies).
https://en.wikipedia.org/wiki/Iodine_pit
but terribly uneconomical. Optimizing economics is about optimizing power output from a given volume of pressure vessel. The power of a nuclear reactor is limited by the ability to get heat out of the fuel rods and into the coolant so good economics requires producing energy evenly throughout the whole core, which commercial reactors do and submarine reactors do not.
Submarine reactors are worth it, however, because being able to go around the world over and over again without surfacing is of great military value. It's insane how fast a nuclear aircraft carrier can travel, there's enough uncertainty over where it will be in 15 minutes that an attack with a reasonably sized nuclear warhead could fail to kill it so, so china developed maneuverable hypersonic weapons that could punch a hole in the deck with a conventional weapon
https://en.wikipedia.org/wiki/DF-21#DF-21D_(CSS-5_Mod-4)_Ant...
As for simpler construction it has to be proven. The AP1000 was a "modular reactor" in that they tried to make it out of large modules that could be built in a factory and stuck together on site. The factories struggled to make those modules and when they arrived they often needed major rework. The ACP100 was recently completed in China
https://nucleus.iaea.org/sites/INPRO/df13/Presentations/011_...
and press releases boasted that it was one of the most complex construction projects of all time -- what I wanted to hear was "this is one of the most simple construction projects of all time!"
If you are gonna blow $10 Billion on a 10 year nightmare project, just buy a ton of solar, wind, and batteries to get 2GW in 5 years.
isn't green energy worth higher energy costs?
The latest nuclear plant in the US was the completion of the Vogtle plant in Georgia, which ran a staggering $22B over budget. Twenty Two Billion Dollars over budget!
$22B, is enough to build the largest solar plant in the US 10 times over (total 5GW). Or about 7 of the largest wind farm (total 10.5GW). Or 33 of the largest battery storage plant. With $2B left over for logistics.
And $14B left over for anything else because the total cost was $36B!
The current state of nuclear doesn't make sense anyway you cut it.
In 2025 the cheapest 24/7 energy grid is 90% green, up to 97% green in sunny locations.
https://ember-energy.org/latest-insights/solar-electricity-e...
tl;dr it was commissioned, constructed, and closed due to local safety concerns in the wake of the Three Mile Island accident.
Interesting excerpt from the wiki:
In 2004, the Long Island Power Authority erected two 100-foot, 50 kW wind turbines at the Shoreham Energy Center site,[18] as part of a renewable-energy program.[19][20] At a ceremony, chairman Kessel stated, "We stand in the shadow of a modern-day Stonehenge, a multibillion-dollar monument to a failed energy policy, to formally commission the operation of a renewable energy technology that will harness the power of the wind for the benefit of Long Island's environment." The turbines generate 200 MWh per year, or 1/35,000th of the energy the nuclear plant would have produced.[21]
What they should not do however is to simply look at potential generation capacity and have that be the only important criteria. Voters has clearly demonstrated that they will vote for politicians that can promise stable grid and stable pricing, rather than having those being controlled by the market.
And for that matter, if you are worried about CO2 emissions, you could make that be part of the requirements.
Gas is a bit more expensive than the ideal green model, but cheaper on average. It also can be built anywhere on a comparatively small land parcel, and can provide easily scalable energy 24/7/365.
Love it or hate it, the AI hype has at least lit a fire on nuclear power. If AI winter comes, we at least get to keep the powerplants and receive clean power for decades.
When the AI winter comes, it’s not going to mean the energy devoted to AI applications decreases, it’ll mean the perception of rapid future expansion in profits fueling VC interest in AI goes away. It’s not like we cut back the aggregate energy cohsumption of systems running, say, rule-based expert systems during the last AI winter.
But what happens to the AI in the nuclear winter?
https://en.wikipedia.org/wiki/Indian_Point_Energy_Center
"New York City's greenhouse gas emissions from electricity have increased from approximately 500 to 900 tons of CO2 per MWh from 2019 to 2022 as a result of the closure."
I suspect much of the perception of nuclear being too dangerous comes from the fossil fuel energy lobby.