Present status of corrosion research on the back end of nuclear fuel cycle is described. Spent nuclear fuel reprocessing technology requires anti-corrosive materials under highly oxidizing nitric acid. It is important to make interaction between metals and reprocessing solutions clear.
On the other hand, materials must be kept their life time for thousands of years in the field of high-level waste disposal technology. Corrosion research energies are put into elucidation of phenomena under geological environment.