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Robot begins removing Fukushima nuclear plant’s melted fuel.
(www.voanews.com)
This is a most excellent place for technology news and articles.
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.
That's really interesting about Sharpies, I would have never known that about Sharpies.
Edit: I accidentally the word "never" above.