Probabilistic Safety Assessment for Instrumentation and Control Systems in Nuclear Power Plants: An Overview

Lixuan Lu · Jin Jiang

18 citations0/0 files storedJournal of Nuclear Science and Technology

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Risk and Safety Analysis Nuclear and radioactivity studies Nuclear Engineering Thermal-Hydraulics

Abstract

Deregulation in the electricity market has resulted in a number of challenges in the nuclear power industry. Nuclear power plants must find innovative ways to remain competitive by reducing operating costs without jeopardizing safety. Instrumentation and Control (I&C) systems not only play important roles in plant operation, but also in reducing the cost of power generation while maintaining and/or enhancing safety. Therefore, it is extremely important that I&C systems are managed efficiently and economically. With the increasing use of digital technologies, new methods are needed to solve problems associated with various aspects of digital I&C systems. Probabilistic Safety Assessment (PSA) has proved to be an effective method for safety analysis and risk-based decisions, even though challenges are still present. This paper provides an overview of PSA applications in three areas of digital I&C systems in nuclear power plants. These areas are Graded Quality Assurance, Surveillance Testing, and Instrumentation and Control System Design. In addition, PSA application in the regulation of nuclear power plants that adopt digital I&C systems is also investigated.

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References

1996Probabilistic Risk Assessment and Management for Engineers and Scientists 1997Probabilistic Risk Assessment of Engineering Systems 2001An overview of PSA importance measures 1997System Safety Engineering And Risk Assessment: A Practical Approach 2009Probabilistic Risk Assessment 1999On the use of probabilistic and deterministic methods in risk analysis 1988Probabilistic Risk Assessment in the Nuclear Power Industry: Fundamentals and Applications 2002An analysis of safety-critical digital systems for risk-informed design

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2007Methodologies for the Probabilistic Risk Assessment of Digital Reactor Protection and Control Systems 2008A Quantitative Study on Risk Issues in Safety Feature Control System Design in Digitalized Nuclear Power Plant 2014Three suggestions on the definition of terms for the safety and reliability analysis of digital systems 2007Plant Risk Effect Analysis Focusing on Digital I&C Equipment Failures

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