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Development of a component-level hydrogen transport model with openfoam and application to tritium transport inside a demo hcpb breeder

Pasler, Volker; Arbeiter, Frederik; Klein, Christine; Klimenko, Dmitry; Schlindwein, Georg; Weth, Axel von der

Abstract:
This work continues the development of a numerical model to simulate transient tritium transport on the breeder zone (BZ) level for the EU helium-cooled pebble bed (HCPB) concept for DEMO. The basis of the model is the open-source field operation and manipulation framework, OpenFOAM. The key output quantities of the model are the tritium concentration in the purge gas and in the coolant and the tritium inventory inside the BZ structure. New model features are briefly summarized. As a first relevant application a simulation of tritium transport for a single pin out of the KIT HCPB design for DEMO is presented. A variety of scenarios investigates the impact of the permeation regime (diffusion-limited vs. surface-limited), of an additional hydrogen content of 300 Pa H2 in the purge gas, of the released species (HT vs. T$_{2}$), and of the choice of species-specific rate constants (recombination constant of HT set twice as for H$_{2}$ and T$_{2}$). The results indicate that the released species plays a minor role for permeation. Both permeation and inventory show a considerable dependence on a possible hydrogen addition in the purge gas. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000131880
Veröffentlicht am 30.04.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2076-3417
KITopen-ID: 1000131880
Erschienen in Applied Sciences (Switzerland)
Verlag MDPI
Band 11
Heft 8
Seiten Art.-Nr.: 3481
Schlagwörter tritium transport; hydrogen permeation; safety; OpenFOAM; DEMO; HCPB
Nachgewiesen in Scopus
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