Alpha radiolysis of nitric acid aqueous solution irradiated by 238Pu source  

作　　者：Zhe Liu Zhong Fang Liang Wang Hui He Ming-Zhang Lin 

机构地区：[1]School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China [2]China Institute of Atomic Energy, Beijing 102413, China [3]Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, China

出　　处：《Nuclear Science and Techniques》2017年第4期74-83,共10页核技术（英文）

基　　金：partly supported by the National Natural Science Foundation of China(No.21377122)

摘　　要：Alpha radiolysis of nitric acid aqueous solution by a ^(238)Pu source is investigated experimentally and theoretically.The time dependence of the nitrous acid yield on dose rate,nitric acid concentration,and nitrate ion concentration is studied.A novel kinetic model for the α-radiolysis of nitric acid aqueous solution is established,by considering the direct and indirect effects.The simulation results agree well with the experimental data,indicating the validity of our model to treat the reaction paths for generation and consumption of nitrous acid.It is shown that the redox reactions involving Pu cannot be neglected in theα-radiolysis of the solution.The results provide a better understanding of the α-ray radiolysis of aqueous nitric acid.Alpha radiolysis of nitric acid aqueous solution by a ²³⁸Pu source is investigated experimentally and theoretically. The time dependence of the nitrous acid yield on dose rate, nitric acid concentration, and nitrate ion concentration is studied. A novel kinetic model for the α-radiolysis of nitric acid aqueous solution is established, by considering the direct and indirect effects. The simulation results agree well with the experimental data, indicating the validity of our model to treat the reaction paths for generation and consumption of nitrous acid. It is shown that the redox reactions involving Pu cannot be neglected in the α-radiolysis of the solution. The results provide a better understanding of the α-ray radiolysis of aqueous nitric acid.

关 键 词：a-Radiolysis NITRIC ACID PLUTONIUM Aqueous solution Kinetic model Nitrous ACID 

分 类 号：TL929[核科学技术—核燃料循环与材料]