Development of a Component-Level Hydrogen Transport Model with OpenFOAM and Application to Tritium Transport Inside a DEMO HCPB Breeder
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...
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MDPI AG
2021-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/8/3481 |
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| author | Volker Pasler Frederik Arbeiter Christine Klein Dmitry Klimenko Georg Schlindwein Axel von der Weth |
| author_facet | Volker Pasler Frederik Arbeiter Christine Klein Dmitry Klimenko Georg Schlindwein Axel von der Weth |
| author_sort | Volker Pasler |
| collection | DOAJ |
| description | 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 H<sub>2</sub> in the purge gas, of the released species (HT vs. T<sub>2</sub>), and of the choice of species-specific rate constants (recombination constant of HT set twice as for H<sub>2</sub> and T<sub>2</sub>). 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. An enhanced HT recombination constant reduces steel T inventories and, in the diffusion-limited case, also permeation significantly. Scenarios with 80 bar vs. 2 bar purge gas pressure indicate that purge gas volumetric flow is decisive for permeation. |
| first_indexed | 2024-03-10T12:22:33Z |
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| id | doaj.art-c3f773d9bdd54b008337f4afb34b7258 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T12:22:33Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-c3f773d9bdd54b008337f4afb34b72582023-11-21T15:23:35ZengMDPI AGApplied Sciences2076-34172021-04-01118348110.3390/app11083481Development of a Component-Level Hydrogen Transport Model with OpenFOAM and Application to Tritium Transport Inside a DEMO HCPB BreederVolker Pasler0Frederik Arbeiter1Christine Klein2Dmitry Klimenko3Georg Schlindwein4Axel von der Weth5Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, GermanyKarlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, GermanyKarlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, GermanyKarlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, GermanyKarlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, GermanyKarlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, GermanyThis 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 H<sub>2</sub> in the purge gas, of the released species (HT vs. T<sub>2</sub>), and of the choice of species-specific rate constants (recombination constant of HT set twice as for H<sub>2</sub> and T<sub>2</sub>). 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. An enhanced HT recombination constant reduces steel T inventories and, in the diffusion-limited case, also permeation significantly. Scenarios with 80 bar vs. 2 bar purge gas pressure indicate that purge gas volumetric flow is decisive for permeation.https://www.mdpi.com/2076-3417/11/8/3481tritium transporthydrogen permeationsafetyOpenFOAMDEMOHCPB |
| spellingShingle | Volker Pasler Frederik Arbeiter Christine Klein Dmitry Klimenko Georg Schlindwein Axel von der Weth Development of a Component-Level Hydrogen Transport Model with OpenFOAM and Application to Tritium Transport Inside a DEMO HCPB Breeder Applied Sciences tritium transport hydrogen permeation safety OpenFOAM DEMO HCPB |
| title | Development of a Component-Level Hydrogen Transport Model with OpenFOAM and Application to Tritium Transport Inside a DEMO HCPB Breeder |
| title_full | Development of a Component-Level Hydrogen Transport Model with OpenFOAM and Application to Tritium Transport Inside a DEMO HCPB Breeder |
| title_fullStr | Development of a Component-Level Hydrogen Transport Model with OpenFOAM and Application to Tritium Transport Inside a DEMO HCPB Breeder |
| title_full_unstemmed | Development of a Component-Level Hydrogen Transport Model with OpenFOAM and Application to Tritium Transport Inside a DEMO HCPB Breeder |
| title_short | Development of a Component-Level Hydrogen Transport Model with OpenFOAM and Application to Tritium Transport Inside a DEMO HCPB Breeder |
| title_sort | development of a component level hydrogen transport model with openfoam and application to tritium transport inside a demo hcpb breeder |
| topic | tritium transport hydrogen permeation safety OpenFOAM DEMO HCPB |
| url | https://www.mdpi.com/2076-3417/11/8/3481 |
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