针对EPR核电厂ARE主给水调节阀由同一个FUM280卡件控制有跳堆风险的问题,本文研究了一种FUM280卡件冗余配置的方式,单一FUM280故障后切换至备用卡,提升ARE流量调节阀门的稳定性,防止单一卡件故障导致的ARE阀门意外关闭,进而导致的机组...针对EPR核电厂ARE主给水调节阀由同一个FUM280卡件控制有跳堆风险的问题,本文研究了一种FUM280卡件冗余配置的方式,单一FUM280故障后切换至备用卡,提升ARE流量调节阀门的稳定性,防止单一卡件故障导致的ARE阀门意外关闭,进而导致的机组跳堆。后续可根据现场使用经验大范围推广,从而保证核电厂给水流量调节系统的安全稳定运行,有效减少由于设备尤其是重大关键设备故障导致的停机或停堆次数及相关损失,降低机组运行和维修工作量及成本。In this paper, in order to solve the problem of main feed water supply regulating valve of ARE in EPR nuclear power plant controlled by same FUM280 card with the risk of reactor jump-off, a redundant configuration of FUM280 card is studied. After a single FUM280 failure, the standby card is switched to improve the stability of the ARE flow regulating valve and prevent the accidental closure of ARE valve caused by the failure of a single card unit jump-off. The follow-up can be widely promoted according to the field use experience, so as to ensure the safe and stable operation of the regulating system in water supply of the nuclear power plant and effectively reduce the shutdown times and related losses caused by the failure of equipment, especially major key equipment, and reduce the workload and cost of unit operation and maintenance.展开更多
针对某超(超)临界主给水调节阀在运行工况条件下出现的空化汽蚀现象,结合多级节流降压原理与多相流理论,采用Schnerr and Sauer空化模型和Mixture两相流模型,对调节阀内部流场进行数值模拟,研究了笼罩层数与导流槽宽度对流场空化的影响...针对某超(超)临界主给水调节阀在运行工况条件下出现的空化汽蚀现象,结合多级节流降压原理与多相流理论,采用Schnerr and Sauer空化模型和Mixture两相流模型,对调节阀内部流场进行数值模拟,研究了笼罩层数与导流槽宽度对流场空化的影响。结果表明,随着笼罩层数的增加,调节阀内的最低压强由0.015MPa上升至0.717 MPa,最大流速由147.1 m/s降至49.36 m/s,空化的汽相最大体积分数由0.979降至0.160,多级笼罩有助于实现逐级降压、限制流速及抑制空化的目的;同时在阀门结构尺寸允许条件下,适当增加导流槽宽度也有利于抑制空化。研究结果为该类调节阀的设计提供了参考。展开更多
文摘针对EPR核电厂ARE主给水调节阀由同一个FUM280卡件控制有跳堆风险的问题,本文研究了一种FUM280卡件冗余配置的方式,单一FUM280故障后切换至备用卡,提升ARE流量调节阀门的稳定性,防止单一卡件故障导致的ARE阀门意外关闭,进而导致的机组跳堆。后续可根据现场使用经验大范围推广,从而保证核电厂给水流量调节系统的安全稳定运行,有效减少由于设备尤其是重大关键设备故障导致的停机或停堆次数及相关损失,降低机组运行和维修工作量及成本。In this paper, in order to solve the problem of main feed water supply regulating valve of ARE in EPR nuclear power plant controlled by same FUM280 card with the risk of reactor jump-off, a redundant configuration of FUM280 card is studied. After a single FUM280 failure, the standby card is switched to improve the stability of the ARE flow regulating valve and prevent the accidental closure of ARE valve caused by the failure of a single card unit jump-off. The follow-up can be widely promoted according to the field use experience, so as to ensure the safe and stable operation of the regulating system in water supply of the nuclear power plant and effectively reduce the shutdown times and related losses caused by the failure of equipment, especially major key equipment, and reduce the workload and cost of unit operation and maintenance.
