In the '80s I worked for ESCO in Portland, and we made various large austenitic stainless steel castings for the nuclear energy industry and for nuclear-powered submarines. The problem then was rapid deterioration and replacement of pipes, valves, etc. due to stress corrosion cracking, where the 'stress' was largely due to accumulation of slight local displacements due to radiation. Eventually, microcracks (many) formed, and, if there was a chloride present, it found its way within. Beginning of the end.

I have little doubt that everything made of steel in those facilities will sit around for some years to 'cool'; then will be cut up for scrap - although the 'hottest' material may be buried.

paul spencer