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dc.contributor.authorMartínez Cid, Manel
dc.contributor.authorDies Llovera, Javier
dc.contributor.authorTapia Fernández, Carlos
dc.contributor.authorDíaz Bayona, Pedro
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2016-03-31T12:54:36Z
dc.date.available2016-03-31T12:54:36Z
dc.date.issued2015-09-01
dc.identifier.citationMartínez Cid, M., Dies, J., Tapia, C., Diaz, P. Outage Key Safety Functions Configuration risk assessment for a three loops Westinghouse PWR. "Nuclear engineering and design", 01 Setembre 2015, vol. 291, p. 271-276.
dc.identifier.issn0029-5493
dc.identifier.urihttp://hdl.handle.net/2117/84978
dc.description.abstractThe methodology developed provides guidance on the use of Probabilistic Safety Assessment (PSA) for the risk-informed evaluation of Guides which ensure the compliment of Outage Key Safety Functions (OKSFs) in Nuclear Power Plants. The methodology has been applied to the 3rd and 13th Plant Operational States (POSs) as a Pilot experience. These POSs are within the operating mode 4 (Hot Shutdown) of a 3 loops Westinghouse Pressurized Water Reactor. The addressed Guide requires the operability of just one charge pump as boric acid supply source. PSA gives a Core Damage Frequency increase (¿CDF) of 1.19•10-6 year-1 for the unavailability of the charge pump in standby, consequently, the maximum exposure time (time for the increase of Core Damage Probability of the configuration to reach 1.0E-06) for this situation is T= 53.6 hours. Given an average time for the POSs of 40 hours, it is concluded that the charge pumps requirement is correct. However, it could be improved with the inclusion of an additional inventory replacement function. This would limit the effect on Risk of the charge pump unavailability. Furthermore, the need for the external electrical sources to be available during mode 4 is ratified. The procedure requires the operability of both supply sources during the POSs. The unavailability of one of supply sources them involves a ¿CDF equal to 1.64•10-5 year-1 and a maximum exposure time of T= 3.89 hours. This requirement is considered appropriate from the risk-informed regulation point of view.
dc.format.extent6 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Energies::Energia nuclear
dc.subject.lcshNuclear power plants--Safety measures
dc.subject.otherPlant Operational State
dc.subject.otherOutage Key Safety Functions
dc.subject.otherCore Damage Frequency
dc.subject.otherProbabilistic Safety Assessment
dc.subject.otherPerformance Technical Specifications.
dc.titleOutage Key Safety Functions Configuration risk assessment for a three loops Westinghouse PWR
dc.typeArticle
dc.subject.lemacCentrals nuclears -- Mesures de seguretat
dc.contributor.groupUniversitat Politècnica de Catalunya. NERG - Grup de Recerca d'Enginyeria Nuclear
dc.identifier.doi10.1016/j.nucengdes.2015.05.024
dc.rights.accessOpen Access
local.identifier.drac16669202
dc.description.versionPostprint (published version)
local.citation.authorMartínez Cid, M.; Dies, J.; Tapia, C.; Diaz, P.
local.citation.publicationNameNuclear engineering and design
local.citation.volume291
local.citation.startingPage271
local.citation.endingPage276


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