Abstract
This paper presents a three steps based approach for the evaluation of risk impact of changes to Surveillance Requirements based on the use of the Probabilistic Risk Assessment and addressing identification, treatment and analysis of model and parameter uncertainties in an integrated manner. The paper includes also an example of application that focuses on the evaluation of the risk impact of a Surveillance Frequency change for the Reactor Protection System of a Nuclear Power Plant using a level 1 Probabilistic Risk Assessment. Surveillance Requirements are part of Technical Specifications that are included into the Licensing Basis for operation of Nuclear Power Plants. Surveillance Requirements aim at limiting risk of undetected downtimes of safety related equipment by imposing equipment operability checks, which consist of testing of equipment operational parameters with established Surveillance Frequency and Test Strategy.
| Original language | English |
|---|---|
| Pages (from-to) | 153-165 |
| Number of pages | 13 |
| Journal | Reliability Engineering and System Safety |
| Volume | 126 |
| DOIs | |
| State | Published - Jun 2014 |
| Externally published | Yes |
Bibliographical note
Funding Information:Authors are grateful to the Spanish Ministry of Science and Innovation for the financial support of this work (Research Project ENE2010-17449 ).
Keywords
- Model and parameter uncertainty
- PRA
- Risk evaluation
- Surveillance requirements
- Technical specifications