Journal of Radioanalytical and Nuclear Chemistry

, Volume 183, Issue 2, pp 245–260 | Cite as

Determination of Np, Pu and Am in high level radioactive waste with extraction-liquid scintillation counting

  • Dazhu Yang
  • Yongjun Zhu
  • Rongzhou Jiao
Article

Abstract

A new method for the determination of transuranium elements, Np, Pu and Am with extraction-liquid scintillation counting has been studied systematically. Procedures for the separation of Pu and Am by HDEHP-TRPO extraction and for the separation of Np by TTA-TiOA extraction have been developed, by which the recovery of Np, Pu and Am is 97%, 99% and 99%, respectively, and the decontamination factors for the major fission products (90Sr,137Cs etc.) are 104–106. Pulse shape discrimination (PSD) technique has been introduced to liquid scintillation counting, by which the counting efficiency of α-activity is >99% and the rejection of β-counts is >99.95%. This new method, combining extraction and pulse shape discrimination with liquid scintillation technique, has been successfully applied to the assay of Np, Pu and Am in high level radioactive waste.

Keywords

Physical Chemistry Inorganic Chemistry Liquid Scintillation Radioactive Waste Scintillation Counting 

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Copyright information

© Akadémiai Kiadó 1994

Authors and Affiliations

  • Dazhu Yang
    • 1
  • Yongjun Zhu
    • 1
  • Rongzhou Jiao
    • 1
  1. 1.Institute of Nuclear Energy TechnologyTsinghua UniversityBeijing(P. R. China)

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