秦二厂CNP600堆芯降功率过程轴向功率偏差的控制研究

Study on the Control Strategy of Axial Power Difference in Power Reduction of CNP600 Core of QinshanⅡ

随着我国能源的快速发展,核电机组调峰降功率已成常态。调峰降功率期间,轴向功率偏差ΔI控制存在较大难度,ΔI超带事件时有发生。本文先通过Tulip程序对秦二厂CNP600机组降功率过程实际ΔI和计算ΔI的对比,验证Tulip程序对降功率过程ΔI计算的精度满足要求。然后,通过Tulip程序计算,给出更优化的ΔI控制方案。最后,考虑到实际运行操作和理论计算的差异性,研究分析了几种不同ΔI控制方案对降功率后ΔI的影响。研究结果可为秦二厂CNP600堆芯调峰降功率过程中的ΔI控制提供技术支持。

With the rapid development of energy in China,the peak-load shaving operation of nuclear power plants has become a normal state.During power reduction,the control of axial power deviationΔI is so difficult that events ofΔI deviates from operation band occur frequently.In this paper,Tulip program is verified available by the comparison between actualΔI and calculatedΔI during peak-load shaving operation of CNP600 core of QinshanⅡ.ThenΔI control strategy is optimized by Tulip.Finally,serial different control strategies ofΔI are calculated to study the influence onΔI after power decreasing operation.The study results can provide technical support forΔI control in the peak-load shaving operation of CNP600 core of QinshanⅡ.