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It is sad that this has become a topic of the culture wars. Nothing good comes out of this, certainly not a rational weighing of the pros and cons of nuclear power.
I’m particularly interested in how they plan to finance reactors in a grid dominated by solar. I wouldn’t be surprised if they legally allow the building of new reactors but then fail to find investors. But perhaps they plan on using them as some sort of strategic assets and will just run them at a loss?
Time and demographics are also a component. Italy is old, has worker shortages for living wage work (and is currently issuing ~500k work visas over three years to attract labor to the market), and a new nuclear generator takes at least ten years to build. Each year, an additional 1TW of solar will be deployed globally, at a cost of ~12 cents/watt.
https://ember-energy.org/countries-and-regions/italy/
https://app.electricitymaps.com/map/zone/IT/fifteen_minutes
Record 2026 summer heat impaired nuclear generation in France, Romania, Hungary, and Bulgaria, so I'd be curious how they intend to solve for that as the climate continues to warm (reduced capacity factor from reduced output due to cooling constraints impairs the economics).
France to Upgrade Heat Wave Modeling After Record Nuclear Curbs - https://news.ycombinator.com/item?id=49790006 - September 2026
Europe's Heatwaves Are Putting Nuclear Power Under Pressure - https://news.ycombinator.com/item?id=49466909 - August 2026
Bulgaria's Nuclear Plant Plans First Output Cut Due to Low Danube - https://news.ycombinator.com/item?id=49376860 - August 2026
Record heat is drying up Europe's major rivers, as these striking images show - https://news.ycombinator.com/item?id=49283344 - August 2026
Bloomberg: Hungary Casts Doubt on Nuclear Plant Expansion After Danube Low Levels - https://www.bloomberg.com/news/articles/2026-08-13/hungary-c... - August 13th, 2026
Italy to issue half million non-EU work visas over next three years - https://www.reuters.com/world/italy-issue-half-million-non-e... - June 30th, 2025
Solar is 15% - a lot but not yet dominated. Solar works at day and demand is also highest during the day so solar should not be an enemy of nuclear.
It is actually an enemy of nuclear, economically. Solar is so cheap, it will naturally grow until it satisfies 100% of the daytime load. This pushes nuclear off the grid during the day - it’s power costs too much. But nukes need to be running and selling at 100% 24/7 to have any chance of breaking even.
This is what the OP means - they make no economic sense on most modern grids.
Citation:
France's EDF Warns Solar, Wind Surge Straining Nuclear Fleet Costs - https://news.ycombinator.com/item?id=47037839 - February 2026
https://web.archive.org/web/20260217122120/https://www.edf.f...
Related:
Wind and solar generated more power than fossil fuels in the EU for the first time in 2025 - https://ember-energy.org/latest-updates/wind-and-solar-gener... - January 22nd, 2026
We need to increase energy output by an order of magnitude in order to upgrade civilization to the next level. Does solar offer a pathway to doing that today, once you account for the costs of battery storage?
Nuclear, moreover, keeps us on the tech tree for space exploration. I don’t think solar is going to lead us to fusion or antimatter powered spaceships.
To produce 10x the current power demand with nuclear you’d need breeder reactors or perhaps thorium unless you want to run out of fuel rather quickly. That’s not what is being proposed here.
I also don’t believe that fission, fusion or antimatter are on the same branch of the tech tree.
Total world energy usage is about 1/10,000 what the sun provides. Bumping that up an order of magnitude means 1/1,000 instead. Seems reasonable for solar.
I don’t see research into fission power doing anything useful for spacecraft. The big bottleneck right now is getting stuff to orbit. The rest is easy, relatively speaking. And getting stuff to orbit is not practical with nuclear unless you use something like Orion, which has some downsides to put it mildly, and is already doable with 1950s tech.
Nuclear has no real cons other than time/cost of deployment, and it should be a no brainer for a place like Europe without significant energy resources. Once the power plant is built, it provides 50+ years of nearly free energy. It's that or buying gas from Russia.
Cost and time seem like a pretty important con to me.
Yes no real cons if we exclude the small con of being completely economically unviable.
Nature is healing.
Giant step for SMRs. I'm hopefull for greater NATO collaboration regarding energy security if SMRs prove commercially viable.
I don't understand why people are so bullish about SMRs. 25 years ago we were trying to increase reactor size and testing breeders, no we want smaller reactors, for what reason?
I always thought it was about commoditization: sure a SMR might cost 10x more per watt in theory but if you can reliably roll them off the production line without having to redesign each iteration and without the cost overrunning by 10x, it pays for itself.
A theory with a lot of leaps that is in no way guaranteed. But it’s a nice idea
It will reliably cost only 10x, and it theory it will roll of a production line.
The AP1000 reactors at Vogtle were explicitly marked for the modular construction as a key selling feature, which would reduce time and cost. It came out 20B over budget and 7 years late.
Still doesn't make sense. We could have standardized the old reactors too.
Radioactive material and a bit of water.. there's no reason to design those things a hundred times. France actually did that.
France is still shutting down its plants because the rivers are too warm in the summer. As for floating SMBs in the harbour, I don't think climate change will be kind to this idea.
Because Trump is pushing SMR on all "allies", UK, Japan, Italy:
https://www.bbc.com/news/articles/ckgzevzwxwro
I couldn't find immediate investments from Kushner etc., but will dig further.
Prefab & faster construction possibilities would be a big one.
Democracy is just lovely.
Have your citizens answer to a straightforward question on a topic twice, have them reject it, both times.
And the government will still go its way.
I'm not against nuclear per se, I'm just baffled at the "democratic" process.
I'm Italian and I'm super happy with this.
The referendum that made nuclear energy illegal in Italy was held right after the accident of Chernobyl; people voted with their gut, not with their mind.
Curiously enough, some Italian town signs still have a small sub-sign reading "denuclearized municipality" (example: https://live.staticflickr.com/1421/712461235_e46a2c7db5_z.jp... )
I've seen quite a few SMR proposals over the last couple of years and not a single one that dared to address the whole cycle from deployment to eventual decommission as a function of the total revenues - costs to operate. Most of these projects seem to be made to bilk investors or governments rather than to actually produce power. The day Italy produces the first KWh that is net profitable to the operators without counting subsidies I will be highly amazed, and that's assuming they get to operational in the first place.