- LCOE of solar and wind beats the pants off of nuclear and coal currently. If it isn't in Germany, well, that's a political and management issue.
- maybe you keep the existing nuclear around for levelling, well, fine. But just be ready for it to get "nuked" once the battery/storage costs combined with wind/solar drop under everything. That day isn't today, and it isn't next year, but with cheap sodium ion and many other chemistries in active improvement... it will.
- nuclear waste disposal is solved... if you have a LFTR or similar tech to "burn" it. Otherwise, the usual handwave on nuclear waste is a telltale sign of "old nuclear", as are the people that say it is safe. Solid fuel rod designs are not safe.
I am not saying that LFTR should be the only path forward for nuclear, but the advantages of LFTR should be what a "real" nuclear solution has. LFTR is:
- scalable in size
- meltdown-proof (plug and pool where the liquid loses criticality)
- burns/breeds virtually all of its fuel, and IIRC can "burn" spend rod waste
- somewhat proliferation resistant
Again, I don't know if the LFTR design challenges are truly problematic, but the CAPABILITIES of LFTR should be a standard next-gen nuclear must be held to.
The Greens aren't correct generally in engineering or science, but what they are right about, indirectly, is the culture of nuclear power that grew up in the Cold War and attached to military needs for weapons isotopes.
Those political priorities overrode safety, good design, economic performance, and other concerns, and left us with the terrible solid fuel rod design.
LFTR got canned in the US in a backroom political power move, and the same nuclear establishment keeps it restricted from funds and research.
Again, I'm not saying LFTR is the "one true path". But its core abilities address the Green concerns: meltdown proof and virtually waste free. Those two aspects are the base table stakes a "next gen nuclear" would need. Maybe you have a combined reactor approach where one design produces from solid or pebble fuel, and then that gets fed to LFTRs for final burn off.
So I guess I would recommend Germany / France keep their nukes going for now, but view them as life support: these things are going away once battery/storage tech scales to meet the need, a virtually guaranteed proposition in the five year near future timeline.
For nuclear to be relevant long term you'll need the safety tablestakes mentioned, but all nuclear projects are 10 years out: you'll need a stable price to target/combat 10 years out from wind/solar, and you don't know that right now.