TBM TES手套箱泄漏事故下氚浓度与通风关系研究

Study on Relation of Tritium Concentration and Ventilation Under Leakage Accident of Glove Box in TES of TBM

为了分析TBM TES室内通风是否能在手套箱发生氚泄漏时控制室内氚浓度在安全剂量值,采用Fluent对手套箱的氚泄漏和扩散进行模拟,得到不同通风下手套箱泄漏时的氚泄漏速率以及室内氚浓度分布,并对比分析了模拟数据与理论数据。结果表明TES手套箱泄漏速率为1.41×10^(-5)g/s和1.02×10^(-5)g/s时,分别为5次/h和8次/h的换气通风能控制室内氚浓度在安全剂量值2.0×10^(10)Bq/m^3内;而氚泄漏速率为1.56×10^(-5)g/s时,3次/h的换气通风不能控制室内氚浓度在安全剂量值内;模拟结果与理论结果相一致。结果为TES通风除氚设计提供了理论依据。

In order to analyze that whether ventilation in TES of TBM can control safe tritium room concentration when tritium of the glove box happen to leak, tritium leakage release and diffusion of glove box was simulated by Fluent in this paper, and tritium leakage rate of glove box and distribution of tritium concentration in room under different ventilation flow rate have been obtained, and then the data of simulation and theory was analyzed by comparison. The results shown that ventilation of flow rate of 5 times/h and 8 times/h were able to control room tritium concentration at a safe value of 2.0 10 10Bq/m3 when tritium leakage rate is 1.41 10-5g/s and 1.02 10-5g/s respectively. However, when the tritium leakage rate is 1.56 10-5g/s, the ventilation of the 3/h can not control the tritium concentration under the safe value, and the simulation results are consistent with the the- oretical results. These results provide a theoretical basis for the design of ventilation and detritiation in TES.