Yes. I do participate in the wider FR world as well. :-)
Im a supporter of nuclear plants because they make sense geopolitically.
True. But nuclear power plants would mostly be pushing out coal-powered ones, so the effect on oil wouldn't necessarily be much.
Are there any oil-powered power plants? I honestly don't know.
Looks like substitution for coal and natural gas mainly.
There are some older oil fired boilers (or there used to be) and some gas turbine stations are dual fuel with oil fire capacity. They burn the fuel that is cheapest on any day. It used to be that natural gas was always cheaper, but these days I am not so sure.
If we build enough of them the price of electricity *should* drop, and that might make electric cars and electric home heating more sensible.
But you are right, now it would be used to replace coal, then natural gas.