【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%。更多还原

【Abstract】 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%.更多还原