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1. nokcha+(OP)[view] [source] 2026-02-03 16:17:13
I'd argue that environmental regulations that impede building modern nuclear power plants to replace coal power plants are net harmful. Nuclear power safety has advanced a lot since Chernobyl.
replies(2): >>breaky+A2 >>epista+Hm
2. breaky+A2[view] [source] 2026-02-03 16:27:54
>>nokcha+(OP)
Chernobyl design was never in use in the US, but nuclear went through a long period of near universal public opposition to its expansion because of the high profile disasters that it caused.

Now the cost of solar and storage are dropping at a rate I doubt nuclear is ever going to make a significant comeback. I'm not opposed to it, but I wonder if the economics will ever be favorable even with regulatory reform.

replies(3): >>ch4s3+e5 >>mattma+s5 >>WorldM+pi
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3. ch4s3+e5[view] [source] [discussion] 2026-02-03 16:37:54
>>breaky+A2
> Chernobyl design was never in use in the US

Commercially. Several early test reactors were essentially just graphite moderated piles not unlike Chernobyl, but they were abandoned for a reason.

replies(1): >>mikkup+li
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4. mattma+s5[view] [source] [discussion] 2026-02-03 16:38:44
>>breaky+A2
It would. People are still building some natural gas plants even despite renewables being cheaper and nuclear is far cheaper over its lifecycle than that and, other than regulatory issues, is basically better in every way.
replies(4): >>9rx+F9 >>prpl+sa >>jerlam+Bk >>LorenP+IX7
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5. 9rx+F9[view] [source] [discussion] 2026-02-03 16:53:58
>>mattma+s5
> nuclear is far cheaper over its lifecycle than that

That is the case for base load generation, where the plant can operate near 100% capacity all the time. But that isn't were gas is usually being deployed; it being used for reserve generation. The economics of nuclear isn't as favourable in that application as it costs more or less the same to run at partial generation, or even no generation, as it does when it is going full blast.

replies(1): >>mattma+y04
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6. prpl+sa[view] [source] [discussion] 2026-02-03 16:57:12
>>mattma+s5
There will continue to be new gas plants as long as there are coal plants which will be converted, usually around the time a major overhaul would need to be taken anyway.
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7. mikkup+li[view] [source] [discussion] 2026-02-03 17:32:14
>>ch4s3+e5
Graphite moderated reactors are broadly fine, the problem was with some technical specifics of that specific reactor design, and the operational culture that surrounded it. After Chernobyl, those flaws were corrected and operation of other RBMK reactors has continued to this very day, with no repeats.
replies(1): >>ch4s3+Pp
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8. WorldM+pi[view] [source] [discussion] 2026-02-03 17:32:29
>>breaky+A2
Chernobyl may have done a lot to inflame cultural imagination of what could happen in the worst cases, but the US still had its own high profile disasters like Three Mile Island.

https://en.wikipedia.org/wiki/Three_Mile_Island_accident

replies(2): >>patmor+KC >>LorenP+KU7
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9. jerlam+Bk[view] [source] [discussion] 2026-02-03 17:39:58
>>mattma+s5
Nuclear might be better and cheaper over it's entire lifecycle; but given that the starting costs are so high, the time to build is so long, and the US has serious problems with cost overruns in public projects, as well as the fickleness of both government and public opinion, I don't expect another plant to be built.
replies(1): >>mattma+vy3
10. epista+Hm[view] [source] 2026-02-03 17:48:46
>>nokcha+(OP)
The closest I've gotten to somebody finding environmental regulations that were driving up the cost of nuclear was with some of the latest stuff with people trying to get rid of the LNT model of how radiation affects people.

Getting rid of LNT would allow higher doses to workers, and the way it makes nuclear cheaper is by having less shielding around the reactor.

But if you look at how recent reactors like the AP1000 failed, it's not so much because of the mere quantity of concrete. In fact, one of the big advantages of the AP1000 is that it used a fraction of the concrete and steel of prior designs. The real problem at Vogtle were construction logistics, matching up design to constructible plans, and doing that all in an efficient manner.

The construction process didn't run over budget and over timeline because of environmental regulations, that happened because we don't know how to build big things anymore, in combination with leadership asking for regulatory favors like starting construction before everything has been fully designed, which gave them more rope to hang themselves with.

I don't know the specifics of why France forgot how to build, at Flamanville and Olkiluoto, but I imagine it's a similar tale as in the US. High labor costs, poor logistics, projects dragged out, and having to pay interest on the loan for years and years extra with every delay.

If there's somebody with more specifics on how unnecessary regulation is killing nuclear, I'd love to see it. But after watching attentively and with great interest since ~2005, I've become so disillusioned with nuclear that I doubt we'll ever see it have success in the West again. Factories and manufacturing have seen productivity go through the roof over the past 50 years, while construction productivity is stagnant. Playing to our strengths, and using our very limited construction capacity on building factories rather than building generators, seems far wiser on the macroeconomic scale.

replies(3): >>slavik+no1 >>baud14+xl3 >>LorenP+UZ7
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11. ch4s3+Pp[view] [source] [discussion] 2026-02-03 17:59:51
>>mikkup+li
That's good additional clarification, I only meant to point out that graphite moderated, water cooled reactors had existed in the US and UK.
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12. patmor+KC[view] [source] [discussion] 2026-02-03 18:46:36
>>WorldM+pi
I would hesitate to call Three Mile Island a disaster, it was certainly a nuclear accident. A reactor was damaged, but no one was injured and an absolutely miniscule amount of radiation was released. The other units at the plant continued to operate until quite recently (and might actually be starting up again).
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13. slavik+no1[view] [source] [discussion] 2026-02-03 22:32:06
>>epista+Hm
The £700M (960M USD) spent on fish protection measures at Hinkley Point C would be a topical example [1]. It's expected to save an average of a few hundred twaite shad, six river lamprey, and eighteen allis shad per year, plus one salmon every twelve years, and a trout every thirty-six years.

https://www.salmonbusiness.com/nuclear-plants-new-700-millio...

replies(1): >>tricer+Ht1
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14. tricer+Ht1[view] [source] [discussion] 2026-02-03 22:59:48
>>slavik+no1
The article you linked says "According to a government-commissioned review, Hinkley Point C’s suite of “fish protection measures” will cost more than £700 million".

I spent 10 minutes and have not been able to find said "government-commissioned review". Is this even true?

replies(1): >>epista+uP1
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15. epista+uP1[view] [source] [discussion] 2026-02-04 01:07:11
>>tricer+Ht1
Edit: here's Guardian reporting on the report cited by Salmon Business https://www.theguardian.com/business/2025/dec/12/health-and-... . As somebody who has spent nearly all of my political activity in the past 8 years trying to change local regulations to allow more housing, the whole thing reeks of unfair analysis on all sides and hyper-partisanship. I largely think there should be a more rational evaluation of requirements all around, but it does sound like the 44 tons of killed fish per year is pretty small compared to other human impact, but $700M is not going to save Hinkley Point C.

The stilted phrasing in the report from Salmon Business definitely does not sound very credible, but marine life protection is definitely a real thing with nuclear and all fuel-burning electricity generation

The vast quantities of water needed to cool nuclear (for every kWh of electricity, 2 kWh of waste heat must be discarded) can have significant impacts on wildlife. In the past, we just devastated ecosystems but most modern countries decided they didn't want to do that anymore.

This is not a nuclear regulation, it's a "thermal plant" regulation, it's just that nuclear needs more cooling than, say, combined-cycle gas because nuclear's lower temperatures are less efficient at converting heat to electricity.

At a mere $700M, even dropping all marine life mitigations from Hinkley Point C wouldn't help much with affordability. If they could drop $7B of costs from Hinkley then it may start to have a halfway-competitive price, but it still wouldn't be very attractive.

replies(1): >>tricer+9S1
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16. tricer+9S1[view] [source] [discussion] 2026-02-04 01:26:45
>>epista+uP1
Thanks!
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17. baud14+xl3[view] [source] [discussion] 2026-02-04 13:54:09
>>epista+Hm
For France, I'd argue (just like in the US) that the break in construction of new reactors gutted the industry and institutional knowledge around the construction of reactor
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18. mattma+vy3[view] [source] [discussion] 2026-02-04 15:00:10
>>jerlam+Bk
Well we were speaking of costs in a hypothetical future in which regulations are sane. I don’t expect that to happen either but if it did, the economics would work.
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19. mattma+y04[view] [source] [discussion] 2026-02-04 17:02:48
>>9rx+F9
Right, but in the context of data centers, it’s all about baseload anyway, right? If data centers become a big driver of energy use, there will be a lot lower fluctuation between peak and trough demand.

I can imagine a future in which every data center has a little baby nuclear plant built right next to it. Watts per acre may become a significant measurement of density. Solar’s environmental impact is of course dramatically overstated by its opponents, but it won’t be when we scale it up and have to start slashing forests for it.

replies(1): >>9rx+rb4
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20. 9rx+rb4[view] [source] [discussion] 2026-02-04 17:50:34
>>mattma+y04
If it were simply an option between nuclear or gas for that, nuclear would, generally, be the obvious choice. But it would be quite atypical to build a gas plant to provide base power. Typically they are being built to back up renewables.

Fair point that renewables may have a practical expansion limit, but for the time being are, by far, the cheapest option so a data centre is still going to prefer that source of power to the greatest extent possible, thereby leaving gas/nuclear only as reserve — of which nuclear has not proven to be cost effective at. Geothermal, hydro, etc. are hard to beat, but where you aren't sitting on the perfect environment, generally speaking, wind+solar+gas is about as good as it gets on a cost basis.

replies(1): >>mattma+A55
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21. mattma+A55[view] [source] [discussion] 2026-02-04 22:06:48
>>9rx+rb4
Yeah, and I'm all for all of it. I just can see a future in which nuclear (through some combination of regulatory reform and new technology) ends up becoming cost-feasible and fossil fuels fade away.
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22. LorenP+KU7[view] [source] [discussion] 2026-02-05 18:53:32
>>WorldM+pi
A "disaster" that killed nobody.

Likewise, an even bigger "disaster" at Fukushima--that killed nobody. (The deaths from the evacuation are not deaths from the incident--they wouldn't have died if they had stayed put.)

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23. LorenP+IX7[view] [source] [discussion] 2026-02-05 19:04:19
>>mattma+s5
Renewables are only "cheaper" because the market forces major subsidies. The reality is the value of renewables is the fuel they save. They do not replace the generators or any of the other stuff.
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24. LorenP+UZ7[view] [source] [discussion] 2026-02-05 19:12:48
>>epista+Hm
Shielding isn't going to be a major portion of the cost. Exposure is from stuff that leaks, not stuff that comes through the walls.

And the cost overruns are to a large degree due to regulations--specifically, changing regulations. The environmentalists have destroyed nuclear by forcing delays and changes, that is the *majority* of the cost. Especially the delays.

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