对SGTR事故基于征兆的处理策略分析

The Symptom Emergency Operation Strategy Analysis on SGTR

电厂正常运行时发生蒸汽发生器传热管破裂(SGTR)事故,考虑到燃料棒破损,反应堆冷却剂被裂变产物污染。由于该事故使放射性冷却剂从一回路向二回路系统泄漏,进而导致二回路系统放射性增加,另外如果破损蒸汽发生器发生满溢将对环境造成严重影响。本文基于SGTR事故征兆及后果等分析,确定适用于国内某百万千瓦级核电厂的基于征兆的SGTR事故处理策略,并通过最佳估算模型计算,分析评估基于征兆的SGTR事故处理策略的效果并最终确定该事故处理策略。

During NPP normal operation,the fission production from ruptured fuel will pollute the reactor coolant.Steam generator tube rupture(SGTR)will cause the leakage from primary system to second system,and induce the radioactive of second increase.If steam generator overfill during SGTR,the environment atmosphere radiation level may be raised.This article make a SGTR emergency operation strategy for a 1000 MW NPP base on the analysis of the symptom of the SGTR,and validate the strategy by best estimate model.