Dynamic Reliability Modeling of Digital Instrumentation and Control Systems in Nuclear Power Plants
نویسندگان
چکیده
Two dynamic methodologies, dynamic flowgraph methodology (DFM) and the Markov/cellto cell mapping technique (CCMT), are implemented on the benchmark digital feedwater control system (DFWCS) specified in NUREG-6942 (Dynamic Reliability Modeling of Digital Instrumentation and Control Systems for Nuclear Reactor Probabilistic Risk Assessments) [1], to demonstrate how an existing nuclear power plant probabilistic risk assessment (PRA) can
منابع مشابه
Review of Various Dynamic Modeling Methods and Development of an Intuitive Modeling Method for Dynamic Systems
When a new system is developed, an evaluation of the system reliability should be carried out in order to determine whether the system is acceptable for an actual spot. Reliability of systems in a nuclear power plant is also analyzed to compare with regulatory criteria designed to ensure the availability of high-quality qualifications. There are several reliability analysis methods: the fault t...
متن کاملInstrumentation and Control (I&C) Systems in Nuclear Power Plants: A Time of Transition - NTR2008 Supplement
Progress in electronics and information technology (IT) has created incentives to replace traditional analog instrumentation and control (I&C) systems in nuclear power plants with digital I&C systems, i.e. systems based on computers and microprocessors. Digital systems offer higher reliability, better plant performance and additional diagnostic capabilities. Analog systems will gradually become...
متن کاملA Cyber Security Risk Assessment for the Design of I&c Systems in Nuclear Power Plants
The instrumentation and control (I&C) systems in nuclear power plants (NPPs) collect signals from sensors measuring plant parameters, integrate and evaluate sensor information, monitor plant performance, and generate signals to control plant devices for a safe operation of NPPs. Although the application of digital technology in industrial control systems (ICS) started a few decades ago, I&C sys...
متن کاملUse of STPA in digital instrumentation and control systems of nuclear power plants
Nuclear power plant operators increasingly face the task of replacing their instrumentation and control systems with modern (digital) systems. In this work the "System Theoretic Process Analysis" (STPA) risk analysis method was adapted and amended to enable it to be used in digital instrumentation and control systems. 1 Background Information Nuclear power plant operators increasingly face the ...
متن کاملStudy on Operator Reliability of Digital Control System in Nuclear Power Plants Based on Boolean Network
The current human reliability analysis method of analyzing system operator’s reliability, carried out from the perspective of operators themselves, is relatively static, for it hasn’t taken the effect of system evolution on the operators’ performance into consideration. In view of operator reliability in digital control system in nuclear power plant, this paper, based on boolean network theory,...
متن کامل