Gamma and alpha radiolysis of TBP solvent  

作　　者：高杨 郑卫芳 曹晓明 陈少雷 

机构地区：[1]Fundamental Science on Nuclear Safety and Simulation Technology Lab,Harbin Engineering University [2]Department of Radiochemistry, China Institute of Atomic Energy

出　　处：《Nuclear Science and Techniques》2015年第1期72-77,共6页核技术（英文）

基　　金：Supported by the Special Fund of Central University Basic Scientific Research Fee(No.HEUCFD1415)

摘　　要：In light of the problem of radiolysis of the solvent system in PUREX(plutonium uranium recovery by extraction) process, γ and α irradiation stabilities of tributylphosphate(TBP)/n-dodecane/nitric acid system were studied using60 Co γ-rays and α particles from238 Pu. The main degradation products, dibutyl phosphate(HDBP)and monobutyl phosphate(H2MBP) were detected by the gas chromatography-mass spectrometry(GC-MS),and the degradation products that could not be easily removed by the washing procedure were measured by the Pu retention. Effects of the absorbed dose, the HNO3 concentration, and the cumulative dose on the irradiation stability of the systems were investigated. The yields of HDBP, H2 MBP and the Pu retention increased with the absorbed dose. The HNO3 concentration affected significantly on the yield of HDBP, but had little impact on the output of H2 MBP and Pu retention. For a similar absorbed dose, the Pu retention of the solvent by alpha irradiation is larger than that by gamma irradiation.In light of the problem of radiolysis of the solvent system in PUREX （plutonium uranium recovery by extraction） process, T and a irradiation stabilities of tributylphosphate （TBP）/n-dodecane/nitric acid system were studied using 60Co γ-rays and α particles from 238pu. The main degradation products, dibutyl phosphate （HDBP） and monobutyl phosphate （H2MBP） were detected by the gas chromatography-mass spectrometry （GC-MS）, and the degradation products that could not be easily removed by the washing procedure were measured by the Pu retention. Effects of the absorbed dose, the HNO3 concentration, and the cumulative dose on the irradiation stability of the systems were investigated. The yields of HDBP, H2MBP and the Pu retention increased with the absorbed dose. The HNO3 concentration affected significantly on the yield of HDBP, but had little impact on the output of H2MBP and Pu retention. For a similar absorbed dose, the Pu retention of the solvent by alpha irradiation is larger than that by gamma irradiation.

关 键 词：溶剂体系 TBP 磷酸三丁酯 HDBP 吸收剂量 钚238 降解产物 磷酸二丁酯 

分 类 号：TL941[核科学技术—辐射防护及环境保护]