At a cost which could generate ~10 billion watts of very low CO2 electricity for decades if invested in renewables.

Also remember that large parts of a nuclear plant is replaced over its operational life. Control systems, steam generators, turbines, generators, tubing, valves etc.

What stays is the outer shell and pressure vessel. A nuclear plant doesn't just "work" for 60 years. And there's no trouble designing renewables with a 60 year lifespan.

We just don't do it because spending money on getting their expected operational lifetimes from decades to 60+ years is betting on extremely uncertain future returns.

Under appreciated benefits of Big Photodiode is that there's no moving parts larger than an electron.

They do degrade over time, especially due to weathering of the seals and UV exposure, but all the quoted numbers are worst-case.

(Inverters are more complicated products and may need more frequently replaced)

Nuclear reactors work at night and when there is no wind. Reliable electricity is far more valuable than unreliable electricity.