Model Establishment for Small Modular Reactor Using MAAP Code and Study on Fission Product Release Characteristics under Severe Accident
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摘要: 建立模块式小型堆(ACP100)严重事故分析程序(MAAP)电厂模型,并经过稳态调试,各稳态运行参数与设计参数的误差在1%左右,表明所建立模型准确度较高。采用所建MAAP模型对ACP100严重事故进行了模拟,给出了事故进程及裂变产物向环境释放变化趋势,结果表明:在安全壳保持完整的条件下,惰性气体向环境的累积释放份额与时间成线性关系,随时间增加而增大;其他元素组向环境的累积释放份额在一段时间后达到最大,之后保持不变。该分析结果为ACP100严重事故条件下放射性释放和场外剂量分析奠定了基础。Abstract: Using MAAP code, a plant model was established for the small modular reactor（ACP100）. The behaviors of the model were tested on the steady state condition. It shows good consistency and the errors were 1% between the calculated values and designation values. Based on the model, a simulation was conducted in the case of severe accident, and the development process and source terms released into the environment are analyzed. It can be seen that the cumulative release fraction of nobles is liner with the time and increased with time. Other groups release fraction reach a maximum after a period of time and keep constants after that. The analysis results are provided as the essential input data for quantifying the release of ACP100 and the offsite dose analysis.
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Key words:
- ACP100 /
- MAAP model /
- Severe accident simulation
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