CNP600堆芯调峰运行时轴向功率偏差影响因素及控制策略研究

Study on Influence Factor and Control Strategy of Axial Power Difference in Peak Load Operation of CNP600 Core

摘要: 随着我国能源的发展，核电将面临着越来越多的调峰运行压力，如采用CNP600堆型的海南昌江核电站，轴向功率偏差ΔI是调峰运行中堆芯功率控制的难点之一。针对CNP600堆芯，分析了慢化剂温度、控制棒棒位、可溶硼浓度等参数对ΔI的影响规律。以此为基础，采用程序模拟了CNP600 3种可能的调峰运行方案，提出了ΔI的控制策略，给出了功率变化过程中ΔI的具体控制方案。研究结果可为CNP600堆芯调峰运行时的堆芯ΔI的控制提供技术支持。

Abstract: With the development of Chinese energy, nuclear power will face more pressure of peak load operation, such as the Hainan Changjiang Nuclear Power Plant which uses the CNP600 technology. The control of axial power difference ΔI is one of the most difficult technical problems in peak load operation. The influences of moderator temperature, rod position of control rod, and concentration of soluble boron on ΔI were analyzed. Based on the influence law, 3 possible schemes of peak load operation were simulated. The ΔI control strategies were put forward, and the detail control scheme with the variety of power was supplied. The results can provide technical support for ΔI control in peak load operation of CNP600.