中国工程试验堆严重事故辐射后果研究

Research on Radioactive Consequences of Severe Accident of China Engineering Test Reactor

为保证中国工程试验堆(CENTER)在严重事故工况下辐射后果满足安全监管要求,且不必采取场外应急措施,需对严重事故工况下放射性物质排放方案进行设计。本文从密闭厂房泄漏率、应急通风系统排风量、密闭方式等方面开展分析,对辐射后果的变化规律进行了研究。结果表明,CENTER密闭厂房泄漏率应采用2%/d,并应采取"严重事故初期密闭,8 h后开启应急通风系统"的排风方案。

In order to ensure that the radioactive consequences of China Engineering Test Reactor meet the requirements of safety supervision under the severe accident condition and that no out-of-site intervention measures are required, it is necessary to design the discharging scheme of radioactive substances under the severe accident condition. This paper mainly analyzes the leakage rate, the air exhaust volume and the sealed mode, and studies the change rules of radioactive consequences. The results show that the airtight building leakage rate of 2%/d and the discharging scheme of 'the emergency ventilation system is closed during the preliminary stage and opened after the 8 h sealed time' should be adopted for China Engineering Test Reactor.