Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (1): S10303 doi: 10.13538/j.1001-8042/nst.26.S10303

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Gamma and alpha radiolysis of TBP solvent

GAO Yang (高杨),1, 2, y ZHENG Wei-Fang (郑卫芳),2 CAO Xiao-Ming (曹晓明),1 and CHEN Shao-Lei (陈少雷)1   

  1. 1Fundamental Science on Nuclear Safety and Simulation Technology Lab,
    Harbin Engineering University, Harbin 150001, China
    2Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
  • Contact: 高杨 E-mail:gaoyang@hrbeu.edu.cn
  • Supported by:

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

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GAO Yang, ZHENG Wei-Fang, CAO Xiao-Ming, and CHEN Shao-Lei. Gamma and alpha radiolysis of TBP solvent.Nuclear Science and Techniques, 2015, 26(1): S10303     doi: 10.13538/j.1001-8042/nst.26.S10303

Abstract:

In light of the problem of radiolysis of the solvent system in PUREX (plutonium uranium recovery by extraction)
process, and irradiation stabilities of tributylphosphate (TBP)/n-dodecane/nitric acid system were studied
using 60Co-rays and 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.

Key words: PUREX process, TBP solvent, Irradiation degradation, Degradation product