AP1000核电厂甩负荷工况下快速降功率系统棒组选择研究

Study on Selection of Rapid Power ReductionSystem Banks for Load Rejection for AP1000 NPP

为了使AP1000快速降功率系统(RPR系统)实现完全甩负荷工况下停机不停堆的目标,必须选择适合于机组当前工况的RPR系统棒组。以AP1000机组调试过程中75%电功率甩负荷和100%RTP(RTP表示反应堆额定功率)甩负荷试验为基础,对RPR系统棒组的选择标准及计算方法进行分析,结果表明,棒组选择方案能够实现RPR系统的设计目标。根据试验经验反馈和AP1000堆芯装载特点,对运行后RPR系统棒组的选择提出建议。

In order to avoid the reactor trip after turbine trip,the right Rapid Power Reduction System should be selected based on the current plant condition.This paper studies on the selection of the control rods which used in Rapid Power Reduction System on the basis of 75%electric power load rejection and 100%RTP load rejection during commissioning phase.The test result confirms that the solution of control rod used in the Rapid Power Reduction System can meet the design requirement.Suggestion for the selection of Rapid Power Reduction banks after plant operation is provided based on the commissioning test experience and AP1000 core loading feature.