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首页> 外文期刊>Nuclear engineering and technology >Improvement of the Reliability Graph with General Gates to Analyze the Reliability of Dynamic Systems That Have Various Operation Modes
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Improvement of the Reliability Graph with General Gates to Analyze the Reliability of Dynamic Systems That Have Various Operation Modes

机译：具有通用门的可靠性图的改进，以分析具有多种操作模式的动态系统的可靠性

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摘要

The safety of nuclear power plants is analyzed by a probabilistic risk assessment, and the fault tree analysis is the most widely used method for a risk assessment with the event tree analysis. One of the well-known disadvantages of the fault tree is that drawing a fault tree for a complex system is a very cumbersome task. Thus, several graphical modeling methods have been proposed for the convenient and intuitive modeling of complex systems. In this paper, the reliability graph with general gates (RGGG) method, one of the intuitive graphical modeling methods based on Bayesian networks, is improved for the reliability analyses of dynamic systems that have various operation modes with time. A reliability matrix is proposed and it is explained how to utilize the reliability matrix in the RGGG for various cases of operation mode changes. The proposed RGGG with a reliability matrix provides a convenient and intuitive modeling of various operation modes of complex systems, and can also be utilized with dynamic nodes that analyze the failure sequences of subcomponents. The combinatorial use of a reliability matrix with dynamic nodes is illustrated through an application to a shutdown cooling system in a nuclear power plant. Copyright (C) 2015, Published by Elsevier Korea LLC on behalf of Korean Nuclear Society.
机译：核电厂的安全性通过概率风险评估进行分析，而故障树分析是使用事件树分析进行风险评估的最广泛使用的方法。故障树的众所周知的缺点之一是为复杂系统绘制故障树是非常繁琐的任务。因此，已经提出了几种图形化建模方法来对复杂系统进行方便和直观的建模。本文对基于贝叶斯网络的直观图形建模方法之一的通用门可靠性图（RGGG）方法进行了改进，以分析具有多种运行模式的动态系统的可靠性。提出了可靠性矩阵，并说明了如何在RGGG中将可靠性矩阵用于各种运行模式变化情况。所提出的带有可靠性矩阵的RGGG，为复杂系统的各种操作模式提供了方便，直观的建模，并且还可以与分析子组件故障序列的动态节点一起使用。通过应用到核电站的停机冷却系统中，说明了可靠性矩阵与动态节点的组合使用。版权所有（C）2015，由Elsevier Korea LLC代表韩国核协会出版。

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