This paper describes a method of calibrating the efficiency of an on-line detection device for fuel rod failure in a pressurized water reactor.
214Am, 137Cs, 60Co and 24Na were selected to produce 4 sets of liquid calibration sources, and a calibration system that could simulate the on-site measurement of the on-line detection device was established. Efficiency calibration was performed against γ-ray lines, which could be identified by a LaBr3(Ce) detector. After a true coincidence summing correction, an efficiency curve of the on-line detection device for fuel rod failure was obtained, with a calibration uncertainty of 3.5%.
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This work was supported by the Nature Science Foundation of China Program (No. 41804114) and Engineering Research Center of Nuclear Technology Application (Ministry of Education No. 1410600030). The authors would like to express thanks to the China Institute of Atomic Energy for its support of this work.
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