反应堆机组停堆检修后重返满功率运行的堆芯控制策略研究

Strategy for Core Control when PWR Returning to Full Power Operation after Shutdown

核电站压水堆(PWR)在寿期末长时间停堆后重返满功率的运行过程中,堆芯控制存在困难,常常不能够安全快速地进入满功率运行。本文通过对影响堆芯控制的各种因素和物理过程进行分析,提出了一套基于临界点状态选择,在升功率期间采用提升功率控制棒和硼浓度稀释相结合的堆芯控制策略,并进行了实际验证。对重返临界点的选择和影响因素的分析直接影响后期操作,是堆芯控制策略的基础。策略对相同状况下的PWR堆芯控制有一定的指导意义。

There are difficulties in the control of reactor core when the reactor returning the full power operation after shutdown during end of cycle.The physics factors and process that with effects on the control have been analyzed,and a strategy,which based on the selection of re-criticality parameters with using of power bank withdraw and boron concentration dilution,is applied.The test results demonstrate the validity of the strategy,which could be used in the same condition of other PWR nuclear power units.