DETERMINATION OF NP, PU AND AM IN HIGH-LEVEL RADIOACTIVE-WASTE WITH EXTRACTION LIQUID SCINTILLATION-COUNTING

被引：23

作者：

YANG, DZ

ZHU, YJ

JIAO, RZ

机构：

[1] Institute of Nuclear Energy Technology, Tsinghua University, Beijing

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1994年 / 183卷 / 02期

关键词：

Fission products - Radioactive wastes - Radioactivity - Scintillation - Scintillation counters;

D O I：

10.1007/BF02037994

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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 (Sr-90, Cs-137 etc.) are 10(4)-10(6). Pulse shape discrimination (PSD) technique has been introduced to liquid scintillation counting, by which the counting efficiency of alpha-activity is > 99% and the rejection of beta-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.

引用

页码：245 / 260

页数：16

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