Computational Fluid Dynamics Applied to Study CoolantLoss Regimes in Very High Temperature Reactors
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| Natura: | Artículo científico |
| Lingua: | en |
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Sociedade Brasileira de Proteção Radiológica - SBPR
2021
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| _version_ | 1876430150140166144 |
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| author | U. G. Moreira |
| author_facet | U. G. Moreira |
| contents | Computational Fluid Dynamics Applied to Study CoolantLoss Regimes in Very High Temperature Reactors U. G. Moreira D. S. Dominguez L. Y. R. Mazaira C. A. B. O. Lira C. R. G Hernandéz Biología 10 HTR CFD VHTR Pebble Bed Reactor The nuclear energy is a good alternative to meet the continuous increase in world energy demand. In this perspective, VHTRs (Very High Temperature Reactors) are serious candidates for energy generation due to itsinherently safe performance, low power density and high conversion efficiency. However, the viability of thesereactors depends on an efficient safety system in the operation of nuclear plants. The HTR (High TemperatureReactor)-10 model, an experimental reactor of the pebble bed type, is used as a case study in this work toperform the thermohydraulic simulation. Due to the complex patterns flow that appear in the pebble bed reactorcore CFD (Computational Fluid Dynamics) techniques are used to simulate these reactors. A realistic approachis adopted to simulate the central annular column of the reactor core. As geometrical model of the fuel elementswas selected the BCC (Body Centered Cubic) arrangement. Parameters considered for reactor design areavailable in the technical report of benchmark issues by IAEA (TECDOC-1694). We obtain the temperature profile distribution in the core for regimes where the coolant flow rate is smaller than recommended in a normaloperation. In general, the temperature distributions calculated are consistent with phenomenological behavior.Even without considering the reactivity changes to reduce the reactor power or other safety mechanisms, themaximum temperatures do not exceed the recommended limits for TRISO fuel elements. 2021 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280948008 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.9 |
| format | Artículo científico |
| id | redalyc_722280948008 |
| institution | Redalyc |
| language | en |
| publishDate | 2021 |
| publisher | Sociedade Brasileira de Proteção Radiológica - SBPR |
| spellingShingle | Computational Fluid Dynamics Applied to Study CoolantLoss Regimes in Very High Temperature Reactors U. G. Moreira Biología 10 HTR CFD VHTR Pebble Bed Reactor Computational Fluid Dynamics Applied to Study CoolantLoss Regimes in Very High Temperature Reactors U. G. Moreira D. S. Dominguez L. Y. R. Mazaira C. A. B. O. Lira C. R. G Hernandéz Biología 10 HTR CFD VHTR Pebble Bed Reactor The nuclear energy is a good alternative to meet the continuous increase in world energy demand. In this perspective, VHTRs (Very High Temperature Reactors) are serious candidates for energy generation due to itsinherently safe performance, low power density and high conversion efficiency. However, the viability of thesereactors depends on an efficient safety system in the operation of nuclear plants. The HTR (High TemperatureReactor)-10 model, an experimental reactor of the pebble bed type, is used as a case study in this work toperform the thermohydraulic simulation. Due to the complex patterns flow that appear in the pebble bed reactorcore CFD (Computational Fluid Dynamics) techniques are used to simulate these reactors. A realistic approachis adopted to simulate the central annular column of the reactor core. As geometrical model of the fuel elementswas selected the BCC (Body Centered Cubic) arrangement. Parameters considered for reactor design areavailable in the technical report of benchmark issues by IAEA (TECDOC-1694). We obtain the temperature profile distribution in the core for regimes where the coolant flow rate is smaller than recommended in a normaloperation. In general, the temperature distributions calculated are consistent with phenomenological behavior.Even without considering the reactivity changes to reduce the reactor power or other safety mechanisms, themaximum temperatures do not exceed the recommended limits for TRISO fuel elements. 2021 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280948008 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.9 |
| title | Computational Fluid Dynamics Applied to Study CoolantLoss Regimes in Very High Temperature Reactors |
| topic | Biología 10 HTR CFD VHTR Pebble Bed Reactor |
| url | https://www.redalyc.org/articulo.oa?id=722280948008 |