核电厂气载放射性物质源通用归一化快速建模方法研究

摘要

气载放射性物质源模型是核电厂安全分析和审查中的关键点之一。但是，目前传统的气载放射性物质源模型是一个通用假设模型，针对不同的应用环境需要重新进行推导，当应用环境中放射性核素的迁移与时变过程复杂多样时，推导过程是非常复杂耗时的，同时易疏漏某些产生项和消失项等关键因素。因此，提出了一种快速准确的气载放射性物质源通用归一化建模方法，该方法适用于核电厂各种空间内的气载放射性物质源浓度计算。初步实验结果表明了方法的准确性。相信该研究成果将对核电厂气载放射性物质源模型的设计及校核工作，特别针对事故应急等需要快速进行气载源项响应的情况具有借鉴意义。%The model of airborne source term is one of the key points for NPPs ’ safety analysis and review . However , currently , the traditional model of the airborne source term is a universal simplified model .In differ-ent conditions , the models should be deduced again .When the modeling conditions are very complicated , more time would be needed during the process of modeling .Meanwhile, lots of mistakes would be appeared .Hence, in this paper , we proposed a universal normalization rapid and exact modeling method which can be used to concentration of airborne source terms in different spaces .The preliminary results demonstrate our method is ef-fective .Believed this rapid and exact modeling method will play a significant role in NPPs ’ safety design and review , especially in nuclear accident emergency cases .