反应堆堆芯积存量算法比较  

Comparison of the Reactor Core Inventory Calculation Methods

作　　者：陈海英[1] 侯秦脉[1] 马帅[1] 陈妍[1] 郑洁 CHEN Hai-ying;HOU Qin-mai;MA Shuai;CHEN Yan;ZHENG Jie(Nuclear and Radiation Safety Center,MEP,Beijing 100082,China)

机构地区：[1]环境保护部核与辐射安全中心,北京100082

出　　处：《核电子学与探测技术》2020年第2期293-297,共5页Nuclear Electronics & Detection Technology

基　　金：重大专项CAP1400安全审评关键技术研究(2013ZX06002001)。

摘　　要：对压水反应堆分别采用反应堆平衡循环寿期末和燃耗包络两种计算方法计算堆芯积存量,对比结果的差异。结果表明:各种核素受计算方法的影响程度不同,83mKr、135Xe和138Cs等10余个核素受影响较大,燃耗包络法计算结果更为保守,其余核素受影响较小。核素放射性活度随着反应堆运行时间的增长可分为核素活度逐渐增加、核素活度先增大后趋于稳定、核素活度逐渐减小和核素活度先增大后减小等不同的变化规律。The PWR core inventory was calculated by two calculation methods of the end of the reactor equilibrium cycle life and fuel burnup envelope and the differences of the results were compared.The results showed that the calculation methods had different effects on the radioactivity of nuclides in the reactor.More than 10 nuclides,such as 83mKr,135Xe,138Cs and so on,were greatly affected.The burnup envelope calculation method was more conservative.The other nuclides were less affected by the calculation method.The nuclides radioactivity varied with the operation of the reactor,which could be divided into four categories.With the increasing of operating time,the activity of nuclide gradually increased,the activity of nuclide first increased and then stabilized,the activity of nuclide gradually decreased,and the activity of nuclide first increased and then decreased.

关 键 词：堆芯积存量 计算方法 燃耗 放射性核素 SCALE 

分 类 号：TL7[核科学技术—辐射防护及环境保护]