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MODELING THE IMPACT OF DIGITAL SYSTEM FAILURE INTO PROBABILISTIC SAFETY ASSESSMENT

机译:模拟数字系统故障对概率安全评估的影响

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Nuclear power plants (NPPs) traditionally relied upon analog instrumentation and control (I&C) systems for monitoring, control, and protection functions. With a shift in technology from analog systems to digital systems with their functional advantages, plants have begun such replacement, while new plant designs fully incorporate digital I&C systems. However, digital systems have some unique characteristics, such as using software, and may have different failure causes and/or modes than the analog systems; hence, their incorporation into NPP probabilistic safety assessments (PSA) entails special challenges. This paper highlights our recent work in incorporating contribution of software in digital I&C reliability analysis.
机译:核电厂(NPPS)传统上依赖于模拟仪器和控制(I&C)系统,用于监控,控制和保护功能。随着技术从模拟系统转移到数字系统,具有功能优势,植物已经开始如此替代,而新工厂设计完全包含数字I&C系统。然而,数字系统具有一些独特的特性,例如使用软件,并且可能具有不同的故障原因和/或模式而不是模拟系统;因此,他们纳入NPP概率安全评估(PSA)需要特殊的挑战。本文突出了我们最近在数字I&C可靠性分析中融入软件贡献的工作。

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