中国电力 ›› 2015, Vol. 48 ›› Issue (4): 66-70.DOI: 10.11930.2015.4.66

• 发电 • 上一篇    下一篇

AP1000核电厂除氧器暂态分析及防汽蚀控制方案

顾先青1,高志清1,屠攀2,程学庆1   

  1. 1. 国核工程有限公司,上海 200233;
    2. 三门核电有限公司,浙江 三门 317109
  • 收稿日期:2015-01-12 出版日期:2015-04-25 发布日期:2015-12-03
  • 作者简介:顾先青(1981—),男,安徽宿州人,硕士,工程师,从事核电厂调试。E-mail: guxianqing@snpec.com.cn

Transient Calculation of Deaerator and Control Scheme of Cavitation Prevention for AP1000 Nuclear Power Plants

GU Xianqing1, GAO Zhiqing1, TU Pan2, CHENG Xueqing1   

  1. 1. State Nuclear Power Engineering Company, Shanghai 200233, China;
    2. Sanmen Nuclear Power Company, Sanmen 317109, China
  • Received:2015-01-12 Online:2015-04-25 Published:2015-12-03

摘要: 为提出合理的AP1000核电厂甩负荷工况下的净正吸入压头(NPSH)控制方案,有效防止运行中主给水泵组汽蚀,分析了汽蚀原理和除氧器液位控制及压力控制逻辑,并收集数据建立除氧器暂态计算模型,计算结果表明凝结水限流控制在30%及除氧器暂态压力下降率控制为0.001 77 MPa/s整定值时,可以满足主给水泵组防汽蚀控制要求,并由此提出几种典型甩负荷工况防汽蚀控制方案和优化措施,指导系统调试和运行,提高机组运行安全性。

关键词: 核电厂, 除氧器, 暂态分析, 净正吸入压头, 控制优化

Abstract: In order to formulate a reasonable NPSH(net positive suction head) control scheme under load rejection conditions of AP1000 nuclear power plants and effectively prevent cavitation in the main feed water pumps during the operation, the cavitation mechanism and the control logics of deaerator water level and pressure are analyzed and the model for deaerator transient calculation is established based on the collected data. The calculation results show that with the setting value of the condensate flow limit at 30% and the deaerator transient pressure decreasing rate at 0.001 77 MPa/s, the NPSH requirements for the main feed water pumps can be met. Therefore, the cavitation prevention schemes and optimization methods for typical load rejection conditions are proposed as the guidance for commissioning and operation to improve the safety of nuclear power plants.

Key words: nuclear power plant, deaerator, transient calculation, net positive suction head, control optimization

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