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Reliability Prediction of Acrylonitrile O-Ring for Nuclear Power Applications Based on Shore Hardness Measurements

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dc.contributor.authorPrimera, Ernesto
dc.contributor.authorFrigione, Maríaenrica
dc.contributor.authorRodríguez Prieto, Álvaro
dc.contributor.authorCamacho López, Ana María
dc.date.accessioned2024-05-20T11:38:59Z
dc.date.available2024-05-20T11:38:59Z
dc.date.issued2021-03-19
dc.description.abstractThe degradation of polymeric components is of considerable interest to the nuclear industry and its regulatory bodies. The objective of this work was the development of a methodology to determine the useful life—based on the storage temperature—of acrylonitrile O-rings used as mechanical sealing elements to prevent leakages in nuclear equipment. To this aim, a reliability-based approach that allows prediction of the use-suitability of different storage scenarios (that involve different storage times and temperatures) considering the further required in-service performance, is presented. Thus, experimental measurements of Shore A hardness have been correlated with storage variables (temperature and storage time). The storage (and its associated hardening) was proved to have a direct effect on in-service durability, reducing this by up to 60.40%. Based on this model, the in-service performance was predicted; after the first three years of operation the increase in probability of failure (POF) was practically insignificant. Nevertheless, from this point on, and especially, from 5 years of operation, the POF increased from 10% to 20% at approximately 6 years (for new and stored). From the study, it was verified that for any of the analysis scenarios, the limit established criterion was above that of the storage time premise considered in usual nuclear industry practices. The novelty of this work is that from a non-destructive test, like a Shore A hardness measurement, the useful life and reliability of O-rings can be estimated and be, accordingly, a decision tool that allows for improvement in the management of maintenance of safety-related equipment. Finally, it was proved that the storage strategies of our nuclear power plants are successful, perfectly meeting the expectations of suitability and functionality of the components when they are installed after storage.en
dc.description.versionversión original
dc.identifier.doi10.3390/polym13060943
dc.identifier.issn2073-4360
dc.identifier.urihttps://hdl.handle.net/20.500.14468/12364
dc.journal.issue6
dc.journal.titlePolymers
dc.journal.volume13
dc.language.isoen
dc.publisherMDPI
dc.relation.centerE.T.S. de Ingenieros Industriales
dc.relation.departmentIngeniería de Construcción y Fabricación
dc.rightsAtribución-CompartirIgual 4.0 Internacional
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-sa/4.0
dc.subject.keywordsreliability
dc.subject.keywordsprognostics
dc.subject.keywordsdesign-for-reliability
dc.subject.keywordsaging
dc.subject.keywordselastomers
dc.subject.keywordsdurability
dc.subject.keywordsharsh environments
dc.titleReliability Prediction of Acrylonitrile O-Ring for Nuclear Power Applications Based on Shore Hardness Measurementses
dc.typeartículoes
dc.typejournal articleen
dspace.entity.typePublication
relation.isAuthorOfPublicationebbef81e-9b79-4d38-ac0b-2069afa400b8
relation.isAuthorOfPublication45331d02-189c-4439-a246-1a0944b2185a
relation.isAuthorOfPublication.latestForDiscoveryebbef81e-9b79-4d38-ac0b-2069afa400b8
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