Study on Level 2 PSA Source Terms Analysis of 1000 MW PWR
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摘要: 为解决源项分析中存在的问题,使用严重事故一体化软件进行详细的计算分析,给出百万千瓦级压水堆核电机组各释放类的源项释放结果。针对代表性事故序列选取这一关键技术问题,进行敏感性分析,结果表明,代表性事故序列的选取方法应尽可能从概率代表性的角度,选取释放类中发生概率最高的事故序列。此外,释放途径模拟、水洗对放射性产物的去除作用对计算结果影响较大,应进行详细模拟。Abstract: In order to resolve the key problem in the severe accident source term calculation technique, the release category of 1000 MWe PWRs and the release fraction of typical accident sequence are calculated by integral code. How to choose the typical scenario is a key problem. The sensitivity analysis and comparison result show that the typical scenario should come from the probability analysis rather than the experience judgement. Other key techniques which have influence on the PSA result have been studied. In order to get reasonable results, the model of the release pass and the water purify effect must be simulated in detail.
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Key words:
- Level 2 PSA /
- Severe accident /
- Source term analysis
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