Probabilistic and Deterministic Safety Assessment Quantification Methods

This chapter addresses safety assessment methods in relation to ageing effects. After a short summary with definitions and framework, a reference Plant Life Management (PLIM) model is discussed, as background for a detailed analysis of the main issues related to a Probabilistic Safety Assessment (PSA) where time dependent, ageing effects are considered. The relevant safety issues are also discussed: the evaluation of time dependent component reliabilities give a chance to the whole PSA to support periodic safety assessment of the plant, informing operational decisions on optimised maintenance, in-service inspections, changes in operational limits and conditions and component replacement. The chapter presents the different PSA phases through case studies where ageing considerations have a strong impact, such as: selection of SSCs to be considered, reliability and data analysis for active components and incorporation of age-dependent reliability parameters and data into PSA models.

CONTRI Paolo;  RODIONOV Andriy; 

2010-08-24

Woodhead Publishing

JRC50672

978-1-84569-511-8,   

www.woodheadpublishing.com,    https://publications.jrc.ec.europa.eu/repository/handle/JRC50672,