海上核应急辐射场计算评估方法  

Radiation field calculation for maritime nuclear emergency

作　　者：钱永柏 党同强 王鑫 汪进[2] 何桃[2] 龙鹏程[2] 胡丽琴[2] QIAN Yongbai;DANG Tongqiang;WANG Xin;WANG Jin;HE Tao;LONG Pengcheng;HU Liqin(Naval Academy,Beijing 100161,China;Key Laboratory of Neutronics and Radiation Safety,Institute of Nuclear Energy Safety Technology,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]海军研究院,北京100161 [2]中国科学院核能安全技术研究所中子输运理论与辐射安全重点实验室,合肥230031

出　　处：《辐射研究与辐射工艺学报》2019年第2期58-64,共7页Journal of Radiation Research and Radiation Processing

基　　金：中国科学院合肥物质科学研究院"十三五"规划重点支持项目(CXJJ);中国科学院信息化专项项目(XXH13506-104);安徽省军民融合引导资金项目;国家科技部国家科技基础条件平台项目(DKA2017-12-02-17)资助~~

摘　　要：源项估算是核应急决策的关键技术之一。针对海上核事故情况下,海面上放射性源项和探测器不断移动这一特殊问题,提出了基于高斯烟团模型和集合卡尔曼滤波的时空修正方法,实现海上核事故源项的反演。以大亚湾核电站假想事故下不同位置处放射性核素浓度作为输入条件,反演得到核事故源强,结果与假想事故源强相差18.4%。Source term estimation is the primary technology employed for decision-making during nuclear emergencies.Maritime nuclear accidents have the issue of the movement of radioactive source terms and detectors.In this paper,a technical solution is proposed for the source term inversion of a marine nuclear accident,which is based on the time-spatial correction of the Gaussian cloud model and ensemble Kalman filter.Radionuclide concentrations at different positions under the Daya Bay nuclear power plant were incorporated for modeling a hypothetical nuclear accident,and the nuclear accident source strength was thereby obtained through the modified inversion method.The obtained result is found to differ from the hypothetical accident source strength by a margin of 18.4%.

关 键 词：海上核应急 源项反演 辐射场计算与剂量评估系统 

分 类 号：TL71[核科学技术—辐射防护及环境保护]