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ACCELERATED PARAMETERIZED COMPUTATION OF THE THERMAL BEHAVIOUR OF DUAL PURPOSE CASKS

Published online by Cambridge University Press:  27 July 2021

Matthias Roppel*
Affiliation:
University of Bayreuth
Christopher Lange
Affiliation:
University of Bayreuth
Bernd Roith
Affiliation:
Swiss Federal Nuclear Safety Inspectorate ENSI
Frank Rieg
Affiliation:
University of Bayreuth
*
Roppel, Matthias Oliver, University of Bayreuth, Chair of Engineering Design and CAD, Germany, matthias.roppel@uni-bayreuth.de

Abstract

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One of the fundamental requirements for dual purpose casks, which are used for the transport and interim storage of spent fuel assemblies, is the safe removal of the resulting decay heat. To ensure this the temperature fields are determined using numerical methods. However, their modelling is complex and the computation time-consuming.

In order to accelerate this thermal assessment, we have developed z88ENSI, an independent simulation tool based on finite element analysis. With regard to the modelling, various parameters can be varied quickly with our newly designed mesh manipulation procedure. Concerning the computation time, we developed and implemented an approach for calculating three-dimensional temperature fields, based on an already existing two-dimensional method which lacked precision. We accelerate the calculation by using extended thermal gap constraints, which depict the thermal behaviour of the non-meshed, gas-filled gaps inside the cask. We validate the results of our calculation tool by comparing them with those generated with Ansys. The results of the comparison temperatures differ between −0.8% and 3.7%. The speedup of z88ENSI for the specific validation setting is between 6.9 and 15.0.

Type
Article
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
The Author(s), 2021. Published by Cambridge University Press

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ACCELERATED PARAMETERIZED COMPUTATION OF THE THERMAL BEHAVIOUR OF DUAL PURPOSE CASKS
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