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Measurement of the gamma dose rate distribution in a spent fuel assembly with a thermoluminescent detector

Journal Article · · Nucl. Technol.; (United States)
OSTI ID:5335615
Thermoluminescent detectors (TLDs) were applied to measurements of gamma dose rates and their distributions in spent fuel assemblies irradiated in a boiling water reactor, the Japan Power Demonstration Reactor (JPDR). Materials used for the TLD were Mg/sub 2/SiO/sub 4/:Tb and LiF. Feasibility of the technique was confirmed by an on-site measurement in a spent fuel pond of the JPDR. The highest gamma dose rate calibrated to a /sup 60/Co gamma field was 4 x 10/sup 3/ R/h in the measured positions in a spent fuel assembly, with an average burnup of 5639 MWd/MTM and a cooling time of 8 yr. Reliability of the measurement by means of a TLD was tested via duplicate measurements on a fuel assembly. In the fields of nuclear safeguards and fuel management, application of TLDs will be effective in obtaining inside information of a spent fuel assembly nondestructively.
Research Organization:
Japan Atomic Energy Research Inst., Tokai Ibaraki, Japan
OSTI ID:
5335615
Journal Information:
Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 47:3; ISSN NUTYB
Country of Publication:
United States
Language:
English