Determination of Np, Pu and Am in high level radioactive waste with extraction-liquid scintillation counting
Description
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. (author) 7 refs.; 7 figs.; 4 tabs
Additional details
Publishing Information
- Journal Title
- Journal of Radioanalytical and Nuclear Chemistry
- Journal Volume
- 183
- Journal Issue
- 2
- Journal Page Range
- p. 245-260.
- ISSN
- 0236-5731
- CODEN
- JRNCDM
INIS
- Country of Publication
- Hungary
- Country of Input or Organization
- Hungary
- INIS RN
- 26028035
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- AMERICIUM; FISSION PRODUCTS; FLOWSHEETS; HIGH-LEVEL RADIOACTIVE WASTES; LIQUID SCINTILLATION DETECTORS; NEPTUNIUM; PLUTONIUM; PULSE DISCRIMINATORS; RADIOMETRIC ANALYSIS; SAMPLE PREPARATION; SEPARATION PROCESSES
- Descriptors DEC
- ACTINIDES; CHEMICAL ANALYSIS; DIAGRAMS; DISCRIMINATORS; ELECTRONIC CIRCUITS; ELEMENTS; INFORMATION; ISOTOPES; MATERIALS; MEASURING INSTRUMENTS; METALS; PULSE CIRCUITS; QUANTITATIVE CHEMICAL ANALYSIS; RADIATION DETECTORS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; SCINTILLATION COUNTERS; TRANSPLUTONIUM ELEMENTS; TRANSURANIUM ELEMENTS; WASTES