哈尔滨工程大学学报2025，Vol.46Issue(11)：2173-2180,8.DOI:10.11990/jheu.202507004
含镎钚硝酸水溶液中内源辐射对钚价态影响的模拟计算
Simulation of endogenous radiation effects on plutonium oxidation states in neptunium-plutonium nitrate aqueous solutions
摘要
Abstract
The radioactive decay of neptunium and plutonium,along with the presence of fission fragments,influ-ences the valence state of plutonium during the reprocessing of spent nuclear fuels.In this study,radiolysis experi-ments were conducted on nitric acid systems containing Np and Pu to investigate the influence of internal α and γsources of Np,Pu,and fission fragments on the valence state of Pu in nitric acid solutions.The experimental re-sults showed that in the presence of γ radiation from a 238Pu solution,approximately 24％of the initial Pu(Ⅲ)(2.5×10-3 mol/L)was oxidized to Pu(Ⅳ)within 24 h,and about 70％was oxidized to Pu(Ⅳ)within 112 h.However,when 239Pu,which emits no γ radiation,was used in the solution,the valence state of Pu showed no re-markably change.Furthermore,based on the decay characteristics of actinide elements and the reaction kinetics of nitric acid aqueous solutions,a radiolysis model of nitric acid systems containing Np and Pu was constructed to ex-plore the reaction mechanisms of irradiation fields affecting the Pu valence state.This study is expected to provide a theoretical foundation and valuable insights for ensuring the safe operation of nuclear facilities in reprocessing plants.关键词
钚/镎/硝酸/后处理/内源辐照/辐射分解/价态变化/模拟计算Key words
plutonium/neptunium/nitric acid/reprocessing/endogenous radiation/radiolysis/valence state chan-ges/simulation分类
生物科学引用本文复制引用
林子健,杜香怡,李一帆,蒋德祥,汪之怡,于婷,何辉,林铭章..含镎钚硝酸水溶液中内源辐射对钚价态影响的模拟计算[J].哈尔滨工程大学学报,2025,46(11):2173-2180,8.基金项目
国家自然科学基金"叶企孙"科学基金项目(U2241289). （U2241289）
