极端事故假设下西安脉冲堆源项计算

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Source Term of Xi’an Pulsed Reactor in Extreme Severe Accident

摘要: 使用ORIGEN2软件计算了西安脉冲堆2 MW满功率连续运行和3种断续运行至燃耗末期的堆芯放射性积存量;选取计算结果中最大积存量4.13×10¹⁶Bq,辅以燃料元件包壳全部破损的极端事故假设和保守地释放模型计算放射性物质环境释放量。结果表明,在1 min内的放射性裂变产物释放高达41.0%,有效释放时间大概持续5 min,最大环境释放量为4.54×10¹²Bq。
- 极端事故 /
- ORIGEN2 /
- 源项 /
- 放射性
Abstract: Inventories of radioactivity in Xi’an Pulsed Reactor（XAPR） are calculated, with the assumption that XAPR is continuously or intermittently operated at full power of 2MW until the fuel rods archive the design burnup. With a conservative releasing model, the biggest inventory 4.13×1016 Bq was selected to evaluate the source term of XAPR in an extreme severe accident, in which all fuel rods are supposed to be ruptured. The result shows that up to 41.0% of radioactive fission products is released in 1minute, the release lasts for about 5 minutes, and the total radioactivity released to environment is 4.54×1012Bq.
- Extreme severe accident /
- ORIGEN2 /
- Source term /
- Radioactivity