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核聚变与等离子体物理 ›› 2012, Vol. 32 ›› Issue (1): 70-75.

• 核聚变工程技术 • 上一篇    下一篇

ITER聚变装置中灰尘带来氢气风险的初步分析

程 坤,佟立丽,曹学武   

  1. (上海交通大学机械与动力工程学院,上海 200240)
  • 收稿日期:2011-07-11 修回日期:2011-09-05 出版日期:2012-03-15 发布日期:2012-03-14
  • 作者简介:程坤(1987-),男,山东省博兴县人,硕士研究生,核能科学与工程专业。
  • 基金资助:

    国际热核聚变实验堆(ITER)计划专项(2009GB106006)

Preliminary analysis of hydrogen risk caused by dust in ITER

CHENG Kun, TONG Li-li, CAO Xue-wu   

  1. (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240)
  • Received:2011-07-11 Revised:2011-09-05 Online:2012-03-15 Published:2012-03-14

摘要:

ITER聚变装置在运行过程中会产生大量的灰尘,当发生事故冷却水进入时,与热的灰尘发生反应产生氢气。氢气聚集后可能会燃烧甚至爆炸,对装置产生破坏。运用CFD的方法对“Wet Bypass”事故后反应产生的氢气风险进行了分析评价,得出在事故的初始阶段氢气达到了燃爆的风险,不同流量的冷却水泄漏进入真空室内会带来不同的氢气风险强度,在冷却水进入量十分大的情况下会惰化灰尘产生的氢气风险。并对注入二氧化碳惰化真空室气体空间的措施进行了分析,在事故发生的初期以较大速率充入二氧化碳能够降低氢气带来的风险。

关键词: ITER, 灰尘, 氢气, Wet Bypass事故

Abstract:

A lot of dust will be generated during ITER operation, and hydrogen will be produced by the interaction of hot dust with water in the case of coolant ingress accident. The accumulated hydrogen will bring risk of combustion and explosion, which will damage the device. CFD method has been used to analyze the produced hydrogen in “wet bypass” scenario, and come to the results that hydrogen will burn and explode at the beginning of the accident, different hydrogen risk will be brought by different coolant leakage, and hydrogen risk will be inert if the leakage is massive. Injecting CO2 to inert the vacuum vessel has also been discussed, the risk of hydrogen will be suppressed by injecting CO2 with a large rate at the beginning of accident.

Key words: ITER, Dust, Hydrogen, Wet bypass

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