An improvement in APOR process I-uranium/plutonium separation process

The reduction stripping behavior of Pu(IV)from 30%TBP/OK with hydroxysemicarbazide(HSC)was investigated,and the separation efficiency of HSC and DMHAN-MMH for U/Pu partitioning in Purex process was compared.The results show that HSC can effectively realize the separation of Pu from U;using mixer-settlers to simulate U/Pu separation in 1B bank of PUREX,from 16-stage counter current extraction experiment(in which6 stages for supplemental extraction,10 stages for stripping)with flow rate ratio(1BF:1BX:1BS)=4:1:1in 1B contactor,good result was achieved that the yields are both more than 99.99%for uranium and Pu,the separation factor of plutonium from uranium(SF4Pu/U)is 2.8×10,and separation factor of uranium from plutonium(SFU/Pu)is 5.9×104.As a stripping reductant,HSC can effectively achieve the separation of Pu from U and the separation effect is nearly the same with DMHAN-MMH,which contributed to replace enough the latter with HSC in the U/Pu separation in Advanced Purex Process Based on Organic Reagent(APOR)process.

The reduction stripping behavior of Pu（IV） from 30%TBP/OK with hydroxysemicarbazide （HSC） was inves- tigated, and the separation efficiency of HSC and DMHAN-MMH for U/Pu partitioning in Purex process was compared. The results show that HSC can effectively realize the separation of Pu from U; using mixer-settlers to simulate U/Pu separation in 1B bank of PUREX, from 16-stage counter current extraction experiment （in which 6 stages for supplemental extraction, 10 stages for stripping） with flow rate ratio （1BF ： 1BX ： 1BS） = 4 ： 1 ： 1 in 1B contactor, good result was achieved that the yields are both more than 99.99% for uranium and Pu, the separation factor of plutonium from uranium （SFpu/U） is 2.8 × 10^4, and separation factor of uranium from plutonium （SFu/pu） is 5.9 × 10^4. As a stripping reductant, HSC can effectively achieve the separation of Pu from U and the separation effect is nearly the same with DMHAN-MMH, which contributed to replace enough the latter with HSC in the U/Pu separation in Advanced Purex Process Based on Organic Reagent （APOR） process.