Analysis of Shutdown Heat-sink Nuclear Safety Requirements for Qinshan Phase III CANDU 6
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摘要: 对秦山三期CANDU 6机组停堆大修时堆芯燃料过热的敏感性进行了分析,介绍了秦山三期CANDU 6核电站1#机组101大修期间热阱的安全原则、管理细则。对停堆期间不同的堆芯余热情况下,失去冷却热阱后燃料达到过热前允许的恢复热阱时间进行了分析计算;并结合首次大修对大修期间低水位工况下停堆冷却泵连续运行、失去四级电源、临时盖板的使用等问题进行了分析,提出了具体建议。Abstract: This paper generally introduced the sensitivity analysis of core overheating during the outage of CANDU 6 unit,and explained the specific heat sink requirements of TQNPP Unit 1 during Outage 101.It also discussed several actual implementation cases and issues during Outage 101,i.e.stop of SDC pump,refill upon loss of Class IV power and use of temporary cover,to which some recommendations are also given.
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Key words:
- CANDU6 /
- Overhauling /
- Heat sink /
- Nuclear safety
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