反应堆内置式控制棒水压驱动回路技术研究

Studies on Design of Internal Hydraulic Control Rod Drive System Loop for Nuclear Reactors

根据内置式控制棒水压驱动技术的特点,提出离心泵连续运行和隔膜泵间歇运行2种驱动回路设计方案,并从振动噪声和耗功的角度对2种方案进行计算、分析和比较。针对隔膜泵间歇运行方案,以某反应堆冷态调试工况为例,计算分析驱动机构水压缸泄漏流量和控制棒动作间隔时间对充水间隔时间和泵运行时间的影响。结果表明,离心泵连续运行方案适用于控制棒数目较多、泄漏流量较大的工况;当泄漏流量较小时,采用隔膜泵间歇运行方案,通过选择合适的隔膜泵流量和储水箱气水比,可减少泵运行时间、增加储水箱充水间隔时间,并减小振动、噪声以及降低功耗。

Based on the characteristics of the internal hydraulic control rod drive technology, two kinds of drive system loop schemes, the centrifugal pump continuous operation scheme and the membrane pump intermittent operation scheme are proposed and compared from the perspective of vibration, noise and energy consumption. The membrane pump intermittent operation scheme is especially calculated and discussed for a typical reactor cold commissioning case. The effects of the hydraulic cylinder leak flow rate and the control rod action interval time on the pump intermittent time and pump operation time are analyzed. Results show that the centrifugal pump continuous operation scheme applies to cases in which the control rod number and hydraulic cylinder leak flow rate are relative large. When the leak flow rate is relative small, the membrane pump intermittent operation scheme is a better choice and the pump intermittent time could be elongated and pump operation time could be shortened by selecting proper pump flow rate and the ratio of the gas to water in the water tank, which is of great help in reducing vibration, noise and energy consumption.