[spiralx]

This paper has an overview of the various things that go into a nuclear power plant along with figures:

https://www.stormsmith.nl/Resources/m36materials20190927F.pd...

It's from the Nuclear Consulting Group who I've never heard of, so I couldn't say how accurate it is.

https://www.nuclearconsult.com/

This also has an overview of some of the materials used:

https://matmatch.com/blog/materials-in-nuclear-reactors/