基于自适应卡尔曼滤波和深度前馈神经网络的氚源项反演

Inversion of tritium source term based on adaptive Kalman filter and deep feedforward neural network

氘氚聚变反应被认为是能够最先实现商业发电的聚变反应,但氚的使用也带来了放射性安全问题。为探究适用于聚变堆事故后的大气释放氚源项反演的计算方法,本研究将自适应卡尔曼滤波与深度前馈神经网络相结合,建立聚变堆事故后的氚释放源项估计算法,对氚的释放高度及释放率进行反演。对神经网络使用滤波前后的观测值作为输入数据时的预测源强进行分析。结果表明,滤波能有效降低神经网络的预测误差。当监测数据误差为20%时,释放高度反演相对误差均值约为3%,释放率反演相对误差均值约为4%。

Deuterium(D)and tritium(T)have been regarded as the first-generation fuels for achieving commercial fusion energy.However,the utilization of the radionuclide tritium introduces concerns related to radioactive safety.This study sought to investigate methods for estimating airborne tritium sources following a fusion reactor incident.An algorithm that combines an adaptive Kalman filter with a deep feedforward neural network was developed to determine the tritium release height and rate.By utilizing observed data both pre-and post-filtering as inputs,the neural network's predictions for the tritium release rate were analyzed.The findings indicate that filtering significantly lowers the prediction errors.Considering a 20% monitoring error,the average relative error for the estimated release height is approximately 3% and that for the release rate is approximately 4%.