Effect of monomethylhydrazine on γ-rays radiolysis and radiolytic by-products of N,N-diethylhydroxylamine in nitric acid solution
摘要
N,N-diethylhydroxylamine (DEHA) is a new salt-free reducing agent applied in the separation of Pu from U in the reprocessing of irradiated fuel from nuclear power plants. The effect of monomethylhydrazine (MMH) on the γ-rays radiolysis of DEHA-HNO3 solution is presented in this paper. MMH can effectively enhance DEHA stability against radiation, and the main radiolytic products are H2, CH4, CH3CHO, CH3COOH and HNO2. The content of H2, CH4, CH3CHO and CH3COOH is raised with the dose. The amount of H2, CH4 and CH3CHO enhances with the MMH concentration, but CH3COOH concentration is reduced when MMH concentration is raised.