发布时间：2025-04-30

论文名称：Numerical method improvement for a subchannel code

发表刊物：Kerntechnik

摘要：Previous studies showed that the subchannel codes needs most CPU time to solve the matrix formed by the conservation equations. Traditional matrix solving method such as Gaussian elimination method and Gaussian-Seidel iteration method cannot meet the requirement of the computational efficiency. Therefore, a new algorithm for solving the block penta-diagonal matrix is designed based on Stone’s incomplete LU (ILU)
decomposition method. In the new algorithm, the original block penta-diagonal matrix will be decomposed into a block upper triangular matrix and a lower block triangular matrix as well as a nonzero small matrix. After that, the LU algorithm is applied to solve the matrix until the convergence. In order to compare the computational efficiency, the new designed algorithm is applied to the ATHAS code in this paper. The calculation results show that more than 80% of the total CPU time can be saved with the new designed ILU algorithm for a 324- channel PWR assembly problem, compared with the original ATHAS code.

合写作者：Wenjie Ding, Junli Gou, Jianqiang SHAN

卷号：8(2016)

页面范围：1-8

是否译文：否

发表时间：2016-04-26