聚变堆中子对第一壁辐照损伤的计算机模拟研究

计算物理 ›› 1994, Vol. 11 ›› Issue (2): 172-178.

聚变堆中子对第一壁辐照损伤的计算机模拟研究

李融武¹, 潘正瑛¹, 邵其¹, 高兴华²

1. 复旦大学, 物理二系, 上海 200433;
2. 中国科学院等离子体物理研究所, 合肥 230031

收稿日期:1992-07-28 修回日期:1993-08-13 出版日期:1994-06-25 发布日期:1994-06-25
基金资助:
国家自然科学基金

COMPUTER SIMULATION OF RADIATION DAMAGE IN THE FIRST WALL CAUSED BY FUSION NEUTRON

Li Rongwu¹, Pan Zhengying¹, Shao Qigun¹, Gao Xinghua²

1. Department of Nuclear Science, Fudan University, Shanghai 200433;
2. Institute of Plasma Physics, Hefei 230031

Received:1992-07-28 Revised:1993-08-13 Online:1994-06-25 Published:1994-06-25

摘要/Abstract

摘要： 用蒙特卡罗方法建立了适用于静态复成分非晶态靶的中子输运和带电粒子辐照损伤连接模拟程序。在模拟带电粒子级联碰撞时,特别考虑了替位碰撞,修正后的DPA(Displacement Per Atom)值比未考虑时减少了10%~20%;同时统计了DPA中反常替位所占的比例。用此程序模拟研究了聚变堆中子对两种第一壁候选材料的辐照损伤,计算了中子辐照在材料中引起的PKA(Primary Knock-on Atom)、气体产生率、DPA以及它们的深度分布。计算结果表明,中子引起的辐照损伤基本上为均匀的体损伤;计算的PE-16材料的DPA值比SS316的稍高,氢气体产生率近似为SS316的两倍;氦气体产生率为SS316的1.45倍;所用聚变堆第一壁中子对PE-16材料的辐照损伤比对SS316的严重。计算中使用的核数据来自MC(87)n数据库。

关键词: 辐照损伤, PKA, DPA, 氢和氦的产生率, 替位碰撞, 反常替位

Abstract: A neutron transport code and a charged-ion radiation damage code have been linked to simulate neutron induced defects in the static, multi-component amorphous target. In simulating collision cascades, replacement collisions have been taken into account, especially. It corrected the value of DPA about 10%~20%. Improper replacements were recorded also. The radiation damage in two kinds of materials candidated for the first wall in fusion reactor is calculated. Calculation gives the production rates of PKA and DPA, gas production rates and their depth distributions. The results show that damage distributions are almost uniform body distributions, the DPA value of PE-16 is a little larger than that of SS316, the hydrogen production rates is nearly two times as much as that of SS316, the helium production rates is 1.45 times as much as that of SS316. It means that the radiation damage of PE-16 is more serious than that of SS316. The cross section data from MC(87) n library is used in the calculation.

Key words: radiation damage, primary knock-on atom, displacement per atom, helium and hydrogen production rates, replacement collision, improper replacement

中图分类号:

O483

李融武, 潘正瑛, 邵其, 高兴华. 聚变堆中子对第一壁辐照损伤的计算机模拟研究[J]. 计算物理, 1994, 11(2): 172-178.

Li Rongwu, Pan Zhengying, Shao Qigun, Gao Xinghua. COMPUTER SIMULATION OF RADIATION DAMAGE IN THE FIRST WALL CAUSED BY FUSION NEUTRON[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 1994, 11(2): 172-178.

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