> Therefore choosing to produce H thanks to nuclear instead of renewables is only useful in order to bump up their capacity factor (reducing their total cost) and may prove to be a bad deal as electrolysis equipment doesn't like (breaks sooner) when using an intermittent electricity input.

Which is entirely ok.

There is one thing people mis-understand often about Nuclear power: The cost of fuel is close to zero. Consequently running a powerplant at full charge or half-charge is exactly the same (It can even be inverted).

So using co-generation as a load regulation is only an economical benefit from a Nuclear perspective.

> may prove to be a bad deal as electrolysis equipment doesn't like (breaks sooner) when using an intermittent electricity input.

The problem is exactly the same than for electrolysis done associated with intermittent renewable. It is quite laughable to see the "full renewable church" bringing Hydrogen as the solution to every grid capacity problem and at the same time bringing that as an argument against Nuclear.