论文标题
高级核电站中数字仪器和控制系统危害分析的冗余引导方法
A Redundancy-Guided Approach for the Hazard Analysis of Digital Instrumentation and Control Systems in Advanced Nuclear Power Plants
论文作者
论文摘要
数字仪器和控制（I＆C）升级是核工业的重要研究领域。尽管其性能优势，但数字I＆C在核电站（NPP）的部署仍有限。数字I＆C系统表现出复杂的故障模式，包括常见原因失败（CCF），可能难以识别。本文介绍了系统理论过程分析（STPA）和故障树分析（FTA）的冗余引导的开发，用于高级NPP中数字I＆C的危害分析。所得的冗余引导系统理论危害分析（RESHA）用于代表性最先进的数字反应堆跳闸系统的案例研究。该分析在定性和系统上确定了数字I＆C系统的最关键的CCF和其他危害。最终，RESHA可以帮助研究人员对诸如冗余，多样性和深度防御等的防御措施的方式以及在多大程度上进行明智的决定，以减轻或消除数字I＆C系统的潜在危害。
Digital instrumentation and control (I&C) upgrades are a vital research area for nuclear industry. Despite their performance benefits, deployment of digital I&C in nuclear power plants (NPPs) has been limited. Digital I&C systems exhibit complex failure modes including common cause failures (CCFs) which can be difficult to identify. This paper describes the development of a redundancy-guided application of the Systems-Theoretic Process Analysis (STPA) and Fault Tree Analysis (FTA) for the hazard analysis of digital I&C in advanced NPPs. The resulting Redundancy-guided System-theoretic Hazard Analysis (RESHA) is applied for the case study of a representative state-of-the-art digital reactor trip system. The analysis qualitatively and systematically identifies the most critical CCFs and other hazards of digital I&C systems. Ultimately, RESHA can help researchers make informed decisions for how, and to what degree, defensive measures such as redundancy, diversity, and defense-in-depth can be used to mitigate or eliminate the potential hazards of digital I&C systems.
