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首页> 外文期刊>Annals of nuclear energy >Unavailability analysis of safety systems under aging by supplementary variables with imperfect repair
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Unavailability analysis of safety systems under aging by supplementary variables with imperfect repair

机译：具有不完善修复的补充变量对老化条件下安全系统的不可用性分析

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摘要

A method was developed for the reliability analysis of systems of components whose failure rates may be time-dependent. A special case of such systems is the one whose components are under aging. The hypothesis of minimum repair is adequate in many cases, especially in heavy industries, such as the nuclear industry. The method employs the technique of supplementary variables to cast the modeled Nonmarkovian systems into Markovian ones. Use is made of the Laplace transform technique, in order to reduce the number of equations, which are then solved by numerical methods. The inverse Laplace transforms to obtain the final solution of the set of differential equations is also done by using the Gauss-Legendre quadrature method which is very fast. Applications to safety systems, like the auxiliary feedwater system of a typical PWR plant show that the method is very fast and accurate as compared to other simulation methods.
机译：开发了一种用于故障率可能与时间有关的组件系统可靠性分析的方法。这种系统的一种特殊情况是组件老化。在许多情况下，最低维修的假设就足够了，尤其是在核工业等重工业中。该方法采用补充变量技术将建模的非马尔可夫系统转化为马尔可夫系统。为了减少方程式的数量，使用了拉普拉斯变换技术，然后通过数值方法对其进行求解。拉普拉斯逆变换以获得微分方程组的最终解，也可以使用非常快的高斯-勒格朗德正交方法来完成。在安全系统中的应用，例如典型压水堆电厂的辅助给水系统，表明该方法与其他模拟方法相比非常快速且准确。

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