泄漏源首次碰撞补偿技术

First Collision Compensation Technique for Leakage Source

提出泄漏源首次碰撞补偿技术,以解决二维/一维中子输运计算收敛不稳定问题。将源项通过首次碰撞方法等效为各个区域的散射源,相当于将局部的孤立源分布到整体的广泛空间中,从而减轻泄漏源加重的射线效应影响,并应用单能修正简化计算方法,提高了二维/一维中子输运计算的收敛性、稳定性和精度。

In order to solve the problem of convergence instability of two-dimensional/one-dimensional neutron transport calculation,the first collision compensation for leakage source technique is proposed.The source term is equivalent to the scattering source of each region by the first collision method,which is equivalent to distributing the local isolated source into the whole wide space,so as to reduce the influence of the radiation effect of the leakage source.The single energy correction method is applied to simplify the calculation,and to improve the convergence,stability and accuracy of the two-dimensional/one-dimensional neutron transport calculation.