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Assessment of Defence in Depth for Nuclear Power Plants

Safety Reports Series No. 46 (Rev.1)

English STI/PUB/2008 ¦ 978-92-0-144923-8

96 pages ¦ 5 figures ¦ € 50.00 ¦ Date published: 2024

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Description

This publication describes the updated version of the method for the assessment of comprehensiveness of defence in depth and demonstrates the overall improvement in assessment results when using it. For assessment of comprehensiveness, five levels of defence in depth are considered. To ensure that safety objectives are met at each level of defence in depth, the integrity of relevant fission product barriers is maintained by the safety functions. A set of challenges to the performance of safety functions and the mechanisms leading to the challenges are specified by the method. Finally, a comprehensive list of safety provisions, which contribute to preventing these mechanisms from occurring, is specified. These provisions encompass the inherent safety features, equipment, procedures, personnel availability, personnel training and safety culture aspects. The challenges, mechanisms and provisions for all levels of defence in depth are presented in the assessment method in the form of objective trees.

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Keywords

Safety Reports, Defence in Depth, Nuclear Power Plant Safety, Defence in Depth Assessment, Safety Objectives, Fission Product Barriers, Safety Functions, Safety Function Challenges, Mechanisms of Challenges, Safety Provisions, Inherent Safety Features, Safety Equipment, Safety Procedures, Personnel Availability, Personnel Training, Safety Culture, Objective Trees, Defence in Depth Levels, Comprehensive Safety Assessment, Nuclear Plant Integrity, Safety Improvement, Assessment Methodology, Nuclear Safety Functions, Defence in Depth Mechanisms, Safety Provision List, Safety Culture Aspects, Nuclear Plant Challenges, Safety Function Performance, Defence in Depth Method, Nuclear Safety Measures, Safety Objective Trees, Nuclear Plant Defence, Fission Product Integrity, Safety Barrier Maintenance, Safety Assessment Techniques, Nuclear Plant Security, Defence in Depth Principles, Comprehensive Defence Methods, Nuclear Plant Operations, Safety Function Integrity, Defence in Depth Strategies

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