A PSA Level-1 method with repairable components: An application to ASTRID Decay Heat Removal systems
2015 (English)In: Safety and Reliability: Methodology and Applications - Proceedings of the European Safety and Reliability Conference, ESREL 2014, 2015, 1611-1617 p.Conference paper (Refereed)
Technological advancements in area of sensor-based online maintenance systems have made the possibility of repairing some failed safety support systems of Nuclear Power Plants (NPP) such as electrical supply, I&C systems, ventilation systems. However, the possibility of repair during accident situation is yet to be included into PSA level-1. Therefore, this paper presents a scheme of PSA level-1 by implementing an integrated method of Repairable Event Tree (RET) and Repairable Fault Tree (RFT) analysis. The Core Damage Frequency (CDF) is calculated from consequence probabilities of the RET. An initiating event of Decay Heat Removal (DHR) systems of ASTRID reactor is analyzed. The proportionate CDFs estimated with repair and without repair have been compared and found that the recoveries can reduce CDF. In sum, this paper attempts to deal with the possibility of repair of some safety systems in PSA and its impacts on CDF of the NPP.
Place, publisher, year, edition, pages
2015. 1611-1617 p.
Nuclear power plants, Online systems, Reliability, Ventilation, Accident situation, Core damage frequency, Decay heat removal, Decay heat removal systems, Online maintenance, Safety support systems, Technological advancement, Ventilation systems, Repair
Other Engineering and Technologies
IdentifiersURN: urn:nbn:se:kth:diva-167393DOI: 10.1201/b17399-219ISI: 000380543400207ScopusID: 2-s2.0-84906679503ISBN: 9781138026810OAI: oai:DiVA.org:kth-167393DiVA: diva2:815577
European Safety and Reliability Conference, ESREL 2014, 14 September 2014 through 18 September 2014, Wroclaw
QC 201506012015-06-012015-05-222016-09-05Bibliographically approved