Development of Nitrogen Oxide Closed System in the Future Reprocessing Process (1) Plan of Study and Progress Report

摘要

An aqueous reprocessing for future type reactors generates much liquid wastes mainly including sodium nitrate as the secondary waste, which has some kinds of difficulty in disposal. A process with salt-free reagent and complete recycle of nitric acid would resolve the problem, but development for such process is not easy. We propose the treatment system of sodium nitrate waste, which we call "Nitrogen Oxide Closed System" (NCS). The system decompose nitric ion , and enable reuse of sodium in sodium nitrate with no generation of sodium nitrate waste. The system allows use of sodium salt reagents and generation of excess acid in reprocessing.