title: Application of annular centrifugal contactors in the hot test of the improved total partitioning process for high level liquid waste.
abstract: High level liquid waste (HLLW) produced from the reprocessing of the spent nuclear fuel still contains moderate amounts of uranium, transuranium (TRU) actinides, (90)Sr, (137)Cs, etc., and thus constitutes a permanent hazard to the environment. The partitioning and transmutation (P&T) strategy has increasingly attracted interest for the safe treatment and disposal of HLLW, in which the partitioning of HLLW is one of the critical technical issues. An improved total partitioning process, including a TRPO (tri-alkylphosphine oxide) process for the removal of actinides, a CESE (crown ether strontium extraction) process for the removal of Sr, and a CECE (calixcrown ether cesium extraction) process for the removal of Cs, has been developed to treat Chinese HLLW. A 160-hour hot test of the improved total partitioning process was carried out using 72-stage 10-mm-dia annular centrifugal contactors (ACCs) and genuine HLLW. The hot test results showed that the average DFs of total α activity, Sr and Cs were 3.57 × 10(3), 2.25 × 10(4) and 1.68 × 10(4) after the hot test reached equilibrium, respectively. During the hot test, 72-stage 10-mm-dia ACCs worked stable, continuously with no stage failing or interruption of the operation.
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China. Electronic address: dwh203@mail.tsinghua.edu.cn.
authors.forename: Wuhua
authors.initials: W
authors.lastname: Duan
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
authors.forename: Jianchen
authors.initials: J
authors.lastname: Wang
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
authors.forename: Shuwei
authors.initials: S
authors.lastname: Wang
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
authors.forename: Xiaogui
authors.initials: X
authors.lastname: Feng
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
authors.forename: Xinghai
authors.initials: X
authors.lastname: Wang
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
authors.forename: Shaowei
authors.initials: S
authors.lastname: Li
authors.affiliation: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Xu
mesh_terms: D020003:1-Octanol / Q000737:chemistry; D002588:Cesium Radioisotopes / Q000737:chemistry*; D043844:Crown Ethers / Q000737:chemistry*; D006358:Hot Temperature; D009943:Organophosphorus Compounds / Q000737:chemistry*; D011850:Radioactive Waste; D013326:Strontium Radioisotopes / Q000737:chemistry*
chemical_list: D002588:Cesium Radioisotopes; D043844:Crown Ethers; D009943:Organophosphorus Compounds; D011850:Radioactive Waste; D013326:Strontium Radioisotopes; D020003:1-Octanol
keywords: Annular centrifugal contactor; High level liquid waste; Hot test; Solvent extraction; Total partitioning process