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Numerical approach for containment assessment of transport packages under regulatory thermal test conditions

  • The requirements of the IAEA safety standards for Type B(U) packages include the thermal test as part of test sequences that represents accident conditions of transport. In comparison to mechanical tests, e.g., 9 m drop onto an unyielding target with short impact durations in a range of approximately 10 ms to 30 ms, the extended period of 30 min is defined in regulations for exposure of a package to a fire environment. Obviously, the required containment capability of the package has to be ensured not only after completing the test sequence but also over the course of the fire test scenario. Especially, deformations in the sealing area induced by the non-uniform thermal dilation of the package can affect the capability of the containment system. Consequently, thermo-mechanical analyses are required for the assessment. In this paper some aspects of finite element analysis (FEA) of transport packages with bolted closure systems under thermal loading are discussed. A generic FE model ofThe requirements of the IAEA safety standards for Type B(U) packages include the thermal test as part of test sequences that represents accident conditions of transport. In comparison to mechanical tests, e.g., 9 m drop onto an unyielding target with short impact durations in a range of approximately 10 ms to 30 ms, the extended period of 30 min is defined in regulations for exposure of a package to a fire environment. Obviously, the required containment capability of the package has to be ensured not only after completing the test sequence but also over the course of the fire test scenario. Especially, deformations in the sealing area induced by the non-uniform thermal dilation of the package can affect the capability of the containment system. Consequently, thermo-mechanical analyses are required for the assessment. In this paper some aspects of finite element analysis (FEA) of transport packages with bolted closure systems under thermal loading are discussed. A generic FE model of a cask is applied to investigate the stress histories in the bolts, lid, and cask body as well as the deformations in the sealing area and the compression conditions of the gasket. Based on the parameter variations carried out, some recommendations in regard to modeling technique and results interpretation for such kind of analyses are finally given.zeige mehrzeige weniger

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Metadaten
Autor*innen:Jens Sterthaus, Viktor Ballheimer, Claus Wilhelm Bletzer, Konrad Linnemann, Marko Nehrig, Frank Wille
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):PVP2014 - ASME 2014 Pressure vessels & piping division conference (Proceedings)
Jahr der Erstveröffentlichung:2014
Herausgeber (Institution):American Society of Mechanical Engineers (ASME)
Jahrgang/Band:3
Erste Seite:28199, 1
Letzte Seite:14
Freie Schlagwörter:Containment; FEA; Gasket; Thermo-mechanical analyses; Transport packages
Veranstaltung:PVP2014 - ASME 2014 Pressure vessels & piping division conference
Veranstaltungsort:Anaheim, CA, USA
Beginndatum der Veranstaltung:2014-07-20
Enddatum der Veranstaltung:2014-07-24
DOI:10.1115/PVP2014-28199
ISBN:978-0-7918-4600-1
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:08.01.2015
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