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Configuration determination for k-out-of-n partially redundant systems

机译:n出n的部分冗余系统的配置确定

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The k-out-of-n configuration is a widely adopted structure for partially redundant safety systems. This configuration ensures a high level of reliability and safety with limited financial and space resources. It also facilitates on-line Test and Maintenance (T&M) without having to shut the system down. One question a decision maker needs to answer when adopting k-out-of-n systems is: what is the best configuration for the application, i.e. how many channels in total need to be utilized and among these channels, how many channels need to function simultaneously in order for the system to function. There are various factors to consider in order to make this decision. This paper looks at this problem from a reliability engineers point of view. A quantitative analysis is performed for both unavailability and probability of spurious operation due to independent failure. In particular, the relative gain and/or loss of these quantities that occurs due to changing from one configuration to another are compared through rigorous mathematical analysis. The results provide important information that can be used when choosing system configurations to meet regulatory requirements and financial constraints. The two different configurations for shutdown systems in Nuclear Power Plants, the 2-out-of-3 system and the 2-out-of-4 system, are utilized as an example to illustrate the theoretical results.
机译:n出k的配置是用于部分冗余安全系统的广泛采用的结构。这种配置可确保在有限的财务和空间资源下实现高度的可靠性和安全性。它还有助于进行在线测试和维护(T&M),而无需关闭系统。决策者在采用k-out-of-n系统时需要回答的一个问题是:最适合该应用程序的配置是什么,即,总共需要利用多少个通道,这些通道中有多少个通道需要工作?同时使系统运行。为了做出此决定,需要考虑多种因素。本文从可靠性工程师的角度研究此问题。对不可用性和由于独立故障而导致的伪操作的可能性进行了定量分析。特别地,通过严格的数学分析来比较由于从一种配置改变为另一种配置而发生的这些量的相对增益和/或损耗。结果提供了重要信息,可在选择系统配置以满足法规要求和财​​务限制时使用。以核电厂关闭系统的两种不同配置为例,即三选二系统和四选二系统,以举例说明理论结果。

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