There are several factors to consider when choosing materials in a nuclear plant. For things that aren’t in direct proximity to the reactor core, neutron activation (becoming radioactive) is less of a concern. Aluminum produces hydrogen gas when exposed to boric acid, which presents an explosion risk. Certain chemical compounds can cause corrosion to plant equipment, even a Sharpie marker could corrode a valve or pipe and cause issues over the 50 year life span of a plant.
I’m going to go drop off my ballot and sit back and wait for the results. There is nothing more I can do so there’s no sense in worrying about it. Focus on things you can actually change.