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核动力反应堆一回路水燃料元件破损监测对于反应堆运行安全十分重要。本课题拟对相关监测装置开展校准技术研究。课题建立了一套LaBr3(Ce)γ谱仪测量系统,该系统包括:取样系统、LaBr3(Ce)探测器、数据获取系统和γ谱分析软件,该系统对137Cs 661.7 keVγ射线能量分辨率为4.5%。课题研制了4组标准液体源用于探测器效率校准。第1组(60Co、137Cs和133Ba)和第3组标准源(241Am和152Eu)由放射性标准溶液制备。第2组标准源(109Cd、57Co和88Y)由低本底反康普顿γ谱仪标准装置定值。第4组为24Na液体源,使用含活化24Na的原子能院492反应堆一回路水,并添加NaCl,由低本底反康普顿γ谱仪标准装置定值。
Nuclear power reactor first-line water fuel component damage monitoring reactor operation and safety is very important. This subject intends to carry out calibration of the relevant monitoring device technology research. A LaBr3 (Ce) γ spectrometer measuring system was established in this paper. The system consists of a sampling system, a LaBr3 (Ce) detector, a data acquisition system and a gamma spectrum analysis software. The energy resolution of 661.7 keV γ- %. The subject developed four standard liquid sources for detector efficiency calibration. Group 1 (60Co, 137Cs and 133Ba) and Group 3 standard sources (241Am and 152Eu) were prepared from radioactive standard solutions. The second set of standard sources (109Cd, 57Co, and 88Y) is set by a low background inverse Compton gamma spectrometer standard set. The fourth group is a 24Na source of liquid using a 494 Reactor primary loop water containing activated 24Na and NaCl added, as determined by a low background Reverse Compton gamma spectrometer standard setup.