CFD Recombiner Modelling and Validation on the H2-Par and Kali-H2 Experiments
A large amount of Hydrogen gas is expected to be released within the dry containment of a pressurized water reactor (PWR), shortly after the hypothetical beginning of a severe accident leading to the melting of the core. According to local gas concentrations, the gaseous mixture of hydrogen, air and...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2011/574514 |
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| author | Stéphane Mimouni Namane Mechitoua Mehdi Ouraou |
| author_facet | Stéphane Mimouni Namane Mechitoua Mehdi Ouraou |
| author_sort | Stéphane Mimouni |
| collection | DOAJ |
| description | A large amount of Hydrogen gas is expected to be released within the dry containment of a pressurized water reactor (PWR), shortly after the hypothetical beginning of a severe accident leading to the melting of the core. According to local gas concentrations, the gaseous mixture of hydrogen, air and steam can reach the flammability limit, threatening the containment integrity. In order to prevent mechanical loads resulting from a possible conflagration of the gas mixture, French and German reactor containments are equipped with passive autocatalytic recombiners (PARs) which preventively oxidize hydrogen for concentrations lower than that of the flammability limit. The objective of the paper is to present numerical assessments of the recombiner models implemented in CFD solvers NEPTUNE_CFD and Code_Saturne. Under the EDF/EPRI agreement, CEA has been committed to perform 42 tests of PARs. The experimental program named KALI-H2, consists checking the performance and behaviour of PAR. Unrealistic values for the gas temperature are calculated if the conjugate heat transfer and the wall steam condensation are not taken into account. The combined effects of these models give a good agreement between computational results and experimental data. |
| format | Article |
| id | doaj-art-3e75596298324cd49621d01c22605e12 |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-3e75596298324cd49621d01c22605e122025-02-03T01:12:14ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832011-01-01201110.1155/2011/574514574514CFD Recombiner Modelling and Validation on the H2-Par and Kali-H2 ExperimentsStéphane Mimouni0Namane Mechitoua1Mehdi Ouraou2R&D Division, Electricité de France, 6 Quai Watier, 78400 Chatou, FranceR&D Division, Electricité de France, 6 Quai Watier, 78400 Chatou, FranceINCKA, 85 avenue Pierre Grenier, 92100 Boulogne, FranceA large amount of Hydrogen gas is expected to be released within the dry containment of a pressurized water reactor (PWR), shortly after the hypothetical beginning of a severe accident leading to the melting of the core. According to local gas concentrations, the gaseous mixture of hydrogen, air and steam can reach the flammability limit, threatening the containment integrity. In order to prevent mechanical loads resulting from a possible conflagration of the gas mixture, French and German reactor containments are equipped with passive autocatalytic recombiners (PARs) which preventively oxidize hydrogen for concentrations lower than that of the flammability limit. The objective of the paper is to present numerical assessments of the recombiner models implemented in CFD solvers NEPTUNE_CFD and Code_Saturne. Under the EDF/EPRI agreement, CEA has been committed to perform 42 tests of PARs. The experimental program named KALI-H2, consists checking the performance and behaviour of PAR. Unrealistic values for the gas temperature are calculated if the conjugate heat transfer and the wall steam condensation are not taken into account. The combined effects of these models give a good agreement between computational results and experimental data.http://dx.doi.org/10.1155/2011/574514 |
| spellingShingle | Stéphane Mimouni Namane Mechitoua Mehdi Ouraou CFD Recombiner Modelling and Validation on the H2-Par and Kali-H2 Experiments Science and Technology of Nuclear Installations |
| title | CFD Recombiner Modelling and Validation on the H2-Par and Kali-H2 Experiments |
| title_full | CFD Recombiner Modelling and Validation on the H2-Par and Kali-H2 Experiments |
| title_fullStr | CFD Recombiner Modelling and Validation on the H2-Par and Kali-H2 Experiments |
| title_full_unstemmed | CFD Recombiner Modelling and Validation on the H2-Par and Kali-H2 Experiments |
| title_short | CFD Recombiner Modelling and Validation on the H2-Par and Kali-H2 Experiments |
| title_sort | cfd recombiner modelling and validation on the h2 par and kali h2 experiments |
| url | http://dx.doi.org/10.1155/2011/574514 |
| work_keys_str_mv | AT stephanemimouni cfdrecombinermodellingandvalidationontheh2parandkalih2experiments AT namanemechitoua cfdrecombinermodellingandvalidationontheh2parandkalih2experiments AT mehdiouraou cfdrecombinermodellingandvalidationontheh2parandkalih2experiments |