基于COMSOL的CFETR TEP手套箱内氚输运模拟研究

Simulation Study of Tritium Transport in CFETR TEP Glove Box based on COMSOL

手套箱是托卡马克排灰气处理系统中减少氚泄漏的重要安全包容体,研究氚在TEP手套箱内的输运过程对氚安全包容系统的详细设计具有重要意义。本文首先基于COMSOL软件建立了物理模型,以日本量子科学技术研究开发机构的涉氚实验对该模型进行了验证,表明COMSOL软件能够很好地模拟氚在空间中的输运过程。然后根据中国聚变工程实验堆TEP最新设计参数开展了运行事件的模拟分析。结果表明:事件开始10 s后,手套箱内氚的浓度基本稳定在7×1014 Bq·m-3水平;应急系统启动后,需要277 s才能将氚的浓度降低至报警设定值以下。该模拟结果可以为CFETR TEP安全包容系统的详细设计提供数据支持。

The glove box is an important safety confinement for reducing tritium leakage in Tokamak Exhaust Processing(TEP)system.The study on tritium transport process in TEP glove box is of great importance to the detailed conceptual design of tritium safety confinement system.In this paper,a physical model is established based on COMSOL software,and the model is verified by comparing the simulation results of COMSOL software with the tritium experimental results of National Institutes for Quantum Science and Technology(QST).The comparison results prove that COMSOL software can simulate the tritium transport process well.According to the latest design parameters of China Fusion Engineering Test Reactor(CFETR),tritium transport process in glove box throughout the TEP typical incident is simulated and analyzed.The results show that:After 10 s of tritium leakage,the tritium concentration in glove box basically stabilized at 7×1014 Bq·m-3;After the emergency system is activated,it takes 277 s to ensure that the tritium concentration in the glove box is reduced below the alarm set value.The simulation results can provide data support for the detailed design of CFETR TEP safety confinement system.