CAJ | 학술논문

针对核电站废气处理系统对所排含氢废气的放射性监测要求，提出了一种在线监测方案，有效地解决了废气处理系统含氢废气中85 Kr、133 Xe核素放射性监测的问题。并利用模拟程序对监测仪的探测效率、环境γ本底影响等进行了蒙特卡罗模拟计算，为设备的研制生产提供了重要的理论参考和依据。计算结果表明：采用尺寸为φ15 mm ×0．5 mm的圆形薄片塑料闪烁体，基于在线监测方案，在理论设计上可满足AP1000核电站废气处理系统对所排含氢废气的放射性监测要求，在γ环境本底小于10μGy/h条件下无需增加铅屏蔽体。
침대핵전참폐기처리계통대소배함경폐기적방사성감측요구，제출료일충재선감측방안，유효지해결료폐기처리계통함경폐기중85 Kr、133 Xe핵소방사성감측적문제。병이용모의정서대감측의적탐측효솔、배경γ본저영향등진행료몽특잡라모의계산，위설비적연제생산제공료중요적이론삼고화의거。계산결과표명：채용척촌위φ15 mm ×0．5 mm적원형박편소료섬삭체，기우재선감측방안，재이론설계상가만족AP1000핵전참폐기처리계통대소배함경폐기적방사성감측요구，재γ배경본저소우10μGy/h조건하무수증가연병폐체。
According to the radioactivity monitoring requirements for exhaust air with the hydrogen waste gas from the waste gas processing system of the nuclear power plant , a kind of on-line monitoring scheme is de-signed to efficiently solve the problem of radiation monitoring of 85 Kr and 133 Xe in waste gas containing hydro-gen.The detection efficiency and the influences of the environmental gamma background for the monitor have been calculated by Monte Carlo code .Thereby , important theoretical references are provided for the equipment development and production .The calculated results show that plastic scintillator with the size of φ10 ×0.5mm that is based on the on -line monitoring scheme fully meets the radioactivity monitoring requirements for exhaust air with the hydrogen waste gas from the waste gas processing system of AP 1000 nuclear power plant .If the gamma environmental background is smaller than 10μGy/h, the lead shielding is not needed .