强激光与粒子束2017，Vol.29Issue(3)：96-101,6.DOI:10.11884/HPLPB201729.160194
改进的线性子链方法在中子活化计算中的应用
Application of improved transmutation traj ectory analysis in neutron activation calculation
彭奕 1张竞宇 1陈义学1
作者信息
- 1. 华北电力大学 核科学与工程学院,北京 102206
- 折叠
摘要
Abstract
Nuclear reactors will produce a large number of neutrons when the plant is in operation.The neutrons could have strong effect on in-core materials and generate active products which could cause destructive effects on staff.Therefore,the high precision and high efficiency calculation of material neutron activation has a significant value for reactor radiation protection.Based on Bateman equation which is used in traditional Transmutation Traj ectory Analysis (TTA),in this paper,limit operation is used to derive the expression of generalized TTA in which repeated eigenvalues are allowed.In this way,the restriction of similar decay constants are removed.Meanwhile,the backtracking algorithm is included for automatically searching nuclide linear chains and the computational efficiency is improved visibly by using the improved TTA.On this foundation,an activation calculation code named ITACT(Improved TTA ACTIVATION)is developed.Finally,this paper combines ITACT with EAF-2007 database to study the activation of cladding material in PWR reactor and first wall material in fusion reactor.Compared with the European general activation code FISPACT,for long life nuclei,the results are in good agreement with each other.But for short life nuclei, ITACT gets higher calculation accuracy,which verifies its feasibility and accuracy.关键词
广义线性子链方法/回溯算法/中子活化计算/ITACT/FISPACTKey words
generalized TTA/backtracking algorithm/neutron activation calculation/ITACT code/FISPACT code分类
能源科技引用本文复制引用
彭奕,张竞宇,陈义学..改进的线性子链方法在中子活化计算中的应用[J].强激光与粒子束,2017,29(3):96-101,6.
