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 st...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.展开更多
基金Supported by the Special Fund of Central University Basic Scientific Research Fee(No.HEUCFD1415)
文摘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.
