Monitoring of the ductile to brittle transition temperature of reactor pressure vessel steels by means of small specimens

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dc.contributor.authorANDRADE, ARNALDO H.P. dept_BR
dc.contributor.authorMIRANDA, CARLOS A.J.pt_BR
dc.contributor.authorLOBO, RAQUEL de M.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL NUCLEAR ATLANTIC CONFERENCEpt_BR
dc.date.accessioned2020-01-15T17:52:48Z
dc.date.available2020-01-15T17:52:48Z
dc.date.eventoOctober 21-25, 2019pt_BR
dc.description.abstractNeutron irradiation in nuclear power plants (NPPs) lead to microstructural changes in structural materials which induce a shift of the ductile to brittle transition temperature (DBTT) towards higher temperatures. Monitoring of the DBTT in NPP components receives therefore considerable attention. Small specimen testing techniques are developed for characterizing structural components with a limited amount of materials. One of the most used of these miniature testing is the small punch test (SPT) which is based on disc or square shaped specimens. SPTs may be performed from room to cryogenic temperatures, plotting the absorbed energy until rupture, against the test temperature. A ductile region (high energy) and a brittle region (low energy) with a transition between both zones are usually reported. The transition temperature thus obtained, DBTTSPT, is also related through empirical expressions to the transition temperature obtained in CVN tests, DBTTCVN, or in fracture toughness testing. Linear expressions such as DBTTSPT = α DBTTCVN have been used where α is a material characteristic constant. In all cases, the DBTTSPT temperature is much lower than that obtained in the CVN tests. In this paper, we present a short review of the literature on the determination of the DBTT for nuclear reactors pressure vessels steels by those two techniques analyzing the reason for the difference in their value as mentioned before. In dealing with irradiated materials, is a high priority to limit the exposure of the professional to irradiation. Therefore, the use of miniature specimens receives significant attention in the nuclear community. The high cost of irradiation experiments is a further incentive for using small specimen testing techniques.pt_BR
dc.event.siglaINACpt_BR
dc.format.extent5322-5338pt_BR
dc.identifier.citationANDRADE, ARNALDO H.P. de; MIRANDA, CARLOS A.J.; LOBO, RAQUEL de M. Monitoring of the ductile to brittle transition temperature of reactor pressure vessel steels by means of small specimens. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. <b>Proceedings...</b> Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 5322-5338. Disponível em: http://repositorio.ipen.br/handle/123456789/30718.
dc.identifier.orcid0000-0001-5407-4521pt_BR
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/30718
dc.localRio de Janeiropt_BR
dc.local.eventoSantos, SPpt_BR
dc.publisherAssociação Brasileira de Energia Nuclear
dc.rightsopenAccesspt_BR
dc.subjectductile-brittle transitions
dc.subjectembrittlement
dc.subjectfracture properties
dc.subjectirradiation
dc.subjectmaterials testing
dc.subjectminiaturization
dc.subjectmonitoring
dc.subjectreactor vessels
dc.subjectsteels
dc.titleMonitoring of the ductile to brittle transition temperature of reactor pressure vessel steels by means of small specimenspt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorRAQUEL DE MORAES LOBO
ipen.autorCARLOS ALEXANDRE DE JESUS MIRANDA
ipen.autorARNALDO HOMOBONO PAES DE ANDRADE
ipen.codigoautor466
ipen.codigoautor1106
ipen.codigoautor1153
ipen.contributor.ipenauthorRAQUEL DE MORAES LOBO
ipen.contributor.ipenauthorCARLOS ALEXANDRE DE JESUS MIRANDA
ipen.contributor.ipenauthorARNALDO HOMOBONO PAES DE ANDRADE
ipen.date.recebimento20-01
ipen.event.datapadronizada2019pt_BR
ipen.identifier.ipendoc26371pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication069d6fa7-19a7-4434-ba9c-8f0f413c7568
relation.isAuthorOfPublicatione93afc86-5e33-4b1d-8c5c-5aea2c3bad6b
relation.isAuthorOfPublication4a03d276-d7a5-47e8-a8e8-5ecd715baa7b
relation.isAuthorOfPublication.latestForDiscovery4a03d276-d7a5-47e8-a8e8-5ecd715baa7b
sigepi.autor.atividadeLOBO, RAQUEL de M.:466:450:Npt_BR
sigepi.autor.atividadeMIRANDA, CARLOS A.J.:1106:420:Npt_BR
sigepi.autor.atividadeANDRADE, ARNALDO H.P. de:1153:730:Spt_BR
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