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Enhancing Tehran research reactor safety using a core differential pressure measuring system
Annals of Nuclear Energy ( IF 1.9 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.anucene.2020.107306
Ebrahim Abedi , Amin Davari , Seyed Mohammad Mirvakili

Abstract Flapper Spurious opening during reactor operation is one of the most perilous accidents for pool-type research reactors. In TRR during such event, if none of SCRAMs could shut-down reactor, partially fuel elements burn-out is occurred. To avoid that, a core cooling condition monitoring system is developed. There are also other PIEs, i.e. fuel element coolant inlet blockage or unintended fuel withdrawal, which can be detected by core DP. In flapper opening scenario, the experiments show core DP response is very tangible. About two other scenarios, results indicate core DP is capable to detect the abnormality in the core flow, but maybe some other supplementary data and signal are required to distinguish the accident. Preliminary data from the system exploitation during reactor operation are analyzed to take into account the uncertainties of various normal operation conditions and determine a minimum allowed working window for the system safety signal.

中文翻译:

使用堆芯压差测量系统提高德黑兰研究堆的安全性

摘要 反应堆运行过程中的挡板误开是池式研究堆最危险的事故之一。在此类事件期间的 TRR 中,如果没有一个 SCRAM 可以关闭反应堆,则会发生部分燃料元件烧毁。为了避免这种情况,开发了一个核心冷却状态监测系统。还有其他 PIE,即燃料元件冷却剂入口堵塞或燃料意外退出,这些都可以通过堆芯 DP 检测到。在挡板打开场景中,实验表明核心 DP 响应非常明显。关于另外两种情况,结果表明堆芯DP能够检测到堆芯流程中的异常,但可能需要一些其他补充数据和信号来区分事故。
更新日期:2020-06-01
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