Published February 2012 | Version v1
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Performance evaluation of multiple gamma-ray detection instrument by non-destructive measurement of radioactive waste sample

Creators

  • 1. Japan Atomic Energy Agency, Nuclear Cycle Backend Directorate, Tokai, Ibaraki (Japan)

Description

Radioanalytical method and measuring technique have been developed for the effective analysis of large number of radioactive waste, in order to accumulate radioactivity data of radioactive waste required to establish reasonable evaluation method of radioactive waste. As one of the method, nondestructive measurement of gamma-ray emitting nuclides has been studied and Multiple Gamma-ray Detection Instrument is newly constructed with 4 detection units consisting of Ge and BGO detectors. The counts coming from Compton scattering were decreased by the combination of Ge and BGO detectors. This instrument can detect multiple gamma-rays continuously emitted by cascade decay simultaneously and determine nuclides with the combination of gamma-ray energy. This instrument was applied to the detection of interested nuclides in radioactive waste sample, which contained significant amount of Co-60, and detection limits of the interested gamma-ray emitting nuclides were improved by a factor of 4 to 12 times than single gamma-ray spectrometer. As for Nb-94, the radioactivity determined from measurements using Multiple Gamma-ray Detection Instrument in this sample was agreed with that determined by radiochemical analysis within 15%. It was confirmed that the instrument was useful for radioactivity determination of gamma-ray emitting nuclides in radioactive waste. (author)

Availability note (English)

Available from JAEA; DOI: https://doi.org/10.11484/jaea-technology-2011-038

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Additional details

Identifiers

DOI
10.11484/jaea-technology-2011-038;

Publishing Information

Imprint Pagination
36 p.
Report number
JAEA-Technology--2011-038

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
43119262
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Descriptors DEI
BGO DETECTORS; COBALT 60; COMPARATIVE EVALUATIONS; GAMMA DETECTION; GE SEMICONDUCTOR DETECTORS; MEASURING METHODS; NIOBIUM 94; NONDESTRUCTIVE ANALYSIS; PERFORMANCE TESTING; RADIOACTIVE WASTE MANAGEMENT
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHEMICAL ANALYSIS; COBALT ISOTOPES; DETECTION; EVALUATION; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MANAGEMENT; MEASURING INSTRUMENTS; MINUTES LIVING RADIOISOTOPES; NIOBIUM ISOTOPES; NUCLEI; ODD-ODD NUCLEI; RADIATION DETECTION; RADIATION DETECTORS; RADIOISOTOPES; SCINTILLATION COUNTERS; SEMICONDUCTOR DETECTORS; SOLID SCINTILLATION DETECTORS; TESTING; WASTE MANAGEMENT; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
10 refs., 12 figs., 5 tabs.