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Development of a simulation tool for the thermal evaluation of transport and storage casks


Dinkel, Christian ; Frisch, Michael ; Billenstein, Daniel ; Roith, Bernd ; Rieg, Frank:
Development of a simulation tool for the thermal evaluation of transport and storage casks.
In: PATRAM 2016. - Tokyo , 2017
ISBN 978-4-88898-270-2


Basically, the safe dissipation of heat is among others an important protection objective of transport and storage casks (T/S-casks). High temperature within the cask can lead to significant decrease in strength of the used materials and to thermal stresses due to different thermal expansion. Gas-filled gaps between various components play a major role for the thermal behavior of casks because they act as thermal barriers due to the lower heat conductivity of gaseous fluids in comparison to metallic materials. However, additional heat transmission mechanisms, such as natural convection and radiation can also occur in a gaseous medium. For the evaluation of the thermal cask behavior within a Finite-Element-Analysis (FEA), every important thermal transfer mechanism has to be considered in each gap for a precise simulation. This leads to both an expanded modelling and a prolonged computing time. Within the scope of a research project the Chair of Engineering Design and CAD of the University of Bayreuth in cooperation with the Swiss Federal Nuclear Safety Inspectorate ENSI developed a simulation tool for the fast thermal evaluation of T/S-casks which combines analytical methods and FEA. The innovation thereby is that gas-filled gaps are not meshed. Their influence on thermal processes is rather considered by using analytical equations. By means of the Lagrange multiplier method, additional mathematical functions between nodes can be applied, even though these nodes are not connected by a finite element. These functions act like boundary conditions and are referred to as thermal gap conditions (TGC). By the use of TGC, significant advantages like modelling efforts and reduced computing time can be achieved.

Weitere Angaben

Publikationsform: Aufsatz in einem Buch
Begutachteter Beitrag: Ja
Keywords: FEA; Transportbehälter; ENSI
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Konstruktionslehre/CAD
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Konstruktionslehre/CAD > Lehrstuhl Konstruktionslehre/CAD - Univ.-Prof. Dr.-Ing. Frank Rieg
Forschungseinrichtungen > Forschungsstellen > ZET - Zentrum für Energietechnik
Fakultäten > Fakultät für Ingenieurwissenschaften
Forschungseinrichtungen > Forschungsstellen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 31 Mär 2017 06:37
Letzte Änderung: 31 Mär 2017 06:37
URI: https://eref.uni-bayreuth.de/id/eprint/36703