Development of an advanced reprocessing system based on use of pyrrolidone derivatives as novel precipitants with high selectivity and control ability - precipitation behavior of plutonium

Yasuji Morita, Sonyun Kimu, Yasuhisa Ikeda, Masanobu Nogami, Kenji Nishimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Precipitation behavior of Pu with pyrrolidone derivatives of N-butyl-2-pyrrolidone (NBP) and N-propyl-2-pyrrolidone (NProP) has been examined to develop a simple reprocessing process of spent nuclear fuel based only on precipitation method. It has been already found that one of the pyrrolidone derivatives, N-cyclohexyl-2-pyrrolidone (NCP), can selectively precipitate UO22+ ions in aqueous HNO3 solutions and a process consisting of two separation processes; selective U precipitation process and U-Pu co-precipitation process, was developed with NCP. In the present study, Pu precipitation from solutions of only Pu and U-Pu mixture with NBP and NProP was examined to evaluate their applicability to the selective U precipitation process. Both NBP and NProP have lower hydrophobicity and donicity than NCP, and are, therefore, expected to make the U precipitation more selective and effective. It was found that the precipitation ability of NBP and NProP for Pu is lower than that of NCP and the lower coprecipitation and faster re-dissolution of Pu(IV) in the mixed solution of U(VI) and Pu(IV) was obtained in the precipitation with NBP and NProP than with NCP. From these results, it is expected that NBP and NProP would make the selective U precipitation process more selective and effective.

Original languageEnglish
Title of host publicationGLOBAL 2007
Subtitle of host publicationAdvanced Nuclear Fuel Cycles and Systems
Pages1508-1512
Number of pages5
Publication statusPublished - 2007 Dec 1
Externally publishedYes
EventGLOBAL 2007: Advanced Nuclear Fuel Cycles and Systems - Boise, ID, United States
Duration: 2007 Sep 92007 Sep 13

Other

OtherGLOBAL 2007: Advanced Nuclear Fuel Cycles and Systems
CountryUnited States
CityBoise, ID
Period07/9/907/9/13

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Nuclear Energy and Engineering

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