HFETR一回路冷却剂中放射性核素在线监测实验研究

Experimental Investigation on On-line Monitoring of Radionuclides in the Primary Loop of HFETR

为进行反应堆一回路系统放射性核素在线监测技术研究,开展了对高通量试验堆(HFETR)一回路系统γ放射性核素在线监测实验研究。着重研究了探测器的选择、HPGe探测器的适用性及关键核素选择等问题。通过实验及对实验结果的分析,初步确定了在进行一回路系统γ放射性核素在线监测时,HPGe探测器比闪烁体探测器有明显的优势;初步确认了用HPGe探测器对一回路系统中的γ放射性核素进行在线监测是可行的;初步确定了用于燃料元件破损监测的关键核素:^(138)Cs、^(92)Sr、^(135)I、^(89)Rb、^(134)I、^(142)La、^(133)I、^(138)Xe及^(139)Ba。

In order to start researches on online monitoring technology of radionuclides in the primary loop, we carried out Experimental Investigations on online monitoring of γ radionuclides in the primary loop of HFETR. This paper summarizes and analyses the results of the test. The results preliminarily confirm that HPGe detector has obvious advantages over scintillator detector. The results also preliminarily confirm that it has certain feasibility to utilize HPGe detector in conducting online monitoring to γ radionuclides in primary loop. The results also preliminarily confirm the key nuclides for fuel element failure monitoring:138Cs,92Sr,135I,89Rb,134I,142La,133I,138Xe and 139Ba.