Study on Reliability of Redundant Standby Pumps in Nuclear-Powered Systems
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摘要: 根据核动力系统中设备冷却泵的工作状态,将冗余泵组的中止回阀看成两个冗余阀,得出简化的可靠性分析框图,并建立泵组的可靠性分析模型。以核动力装置设备冷却泵组为例,分别计算泵组在3种情况下的可靠度。计算结果表明,冗余泵组比单个泵工作的可靠性高,但冗余泵组中泵和阀之间的相关失效削弱了泵组的可靠性。Abstract: According to the work conditions of the component cooling pumps in nuclear-powered sys-tems, the check valve in redundant pumps is taken as two redundant valves. Reliability chart was drawn and reliability analysis model was built up. Based on the example of equipment cooling pumps in nuclear-powered systems, the reliability of pumps in three conditions was separately calculated. Final results show that the re-liability of two-component redundancy is much higher than that of single component, but the dependent fail-ures between pumps and valves in redundancy decrease the reliability.
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Key words:
- Redundant pump group /
- Equipment cooling pumps /
- Reliability /
- Dependent failure
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