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Dependability Assessment of Software for Safety Instrumentation and Control Systems at Nuclear Power Plants

English STI/PUB/1808 (ISBN: 978-92-0-101218-0)
80 pages ¦ 10 figures ¦ EUR 38.00 ¦ Date published: 2018

Description

This publication defines a framework that represents the state of the art in assessment methodologies for safety and instrumentation and control software used at nuclear power plants. It describes an approach for developing and communicating assessments based on claims, argument and evidence. The assessment of software dependability, which encompasses properties such as safety, reliability, availability, maintainability and security, is an essential and challenging aspect of the safety justification. Guiding principles for a dependability assessment are established to provide the basis for defining an assessment strategy and implementing the assessment process. Sources of evidence for the assessment are provided and lessons learned from past digital instrumentation and control system implementation in areas such as software development, operational usage, regulatory review and platform certification are also described.

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