Finite element analysis on plasma-driven transport of tritium in FW of WCCB for CFETR

doi:10.16568/j.0254-6086.201704015

Abstract

Abstract:

Based on the finite element method (FEM), a one-dimensional tritium transport model is set up using COMSOL multiphysics. The model is benchmarked against literature results of hydrogen isotope retention in tungsten. Then a two-dimensional FW model of WCCB for China fusion engineering test reactor (CFETR) is built to analyze the transport of tritium, taking Soret effect into account. The simulation results show that for a single typical blanket, total tritium retention in FW is 0.12mg, and the permeation amount into the coolant is 0.12mg•yr^-1. The retention in RAFM steel will increase by 8.80% while permeation to the coolant by 65.97% when the Soret effect is neglected. Therefore, the Soret effect is significant for the permeation and retention of tritium.

Key words: CFETR, Retention, Permeation, FEM, Soret effect

摘要：

采用多物理场计算程序COMSOL Multiphysics，构建了一维氚输运有限单元模型，并与文献中氢同位素在钨中的滞留实验数据进行模拟验证。基于经过校验的一维模型，并考虑Soret效应，对中国聚变工程实验堆(CFETR)水冷包层第一壁进行了二维氚分析计算。模拟结果表明，氚在单个典型包层第一壁中的总滞留量为0.12mg，进入冷却剂中的总渗透量为0.12mg•yr^-1。若不考虑Soret效应，氚在RAFM钢中的滞留量将增加8.80%，渗透到冷却剂的量增加65.97%。由此可见，Soret效应对于氚的渗透和滞留具有显著的意义。

关键词: 中国聚变工程实验堆, 滞留, 渗透, 有限单元方法, Soret效应

CLC Number:

LAO Ding-yu, HUANG Kai, CHEN Lei, LIU Song-lin. Finite element analysis on plasma-driven transport of tritium in FW of WCCB for CFETR[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2017, 37(4): 457-464.

劳鼎宇, 黄凯, 陈磊, 刘松林. CFETR水冷包层第一壁模块中等离子体注入氚输运有限单元分析[J]. 核聚变与等离子体物理, 2017, 37(4): 457-464.

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