A CFD analysis of blockage length on a partially blocked fuel rod
After a loss of coolant accident (LOCA), fuel rods may balloon. The swelling can partially block the flow channel, affecting the coolability during reflood phase. In order to analyze the influence of blockage length, using a radial blockage of 90%, varying just the blockage length, many steady state...
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Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)
2019-06-01
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| Series: | Brazilian Journal of Radiation Sciences |
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| Online Access: | https://bjrs.org.br/revista/index.php/REVISTA/article/view/437 |
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| author | Nikolas Lymberis Scuro Pedro Ernesto Umbehaun Edvaldo Angelo Gabriel Angelo Delvonei Alves de Andrade |
| author_facet | Nikolas Lymberis Scuro Pedro Ernesto Umbehaun Edvaldo Angelo Gabriel Angelo Delvonei Alves de Andrade |
| author_sort | Nikolas Lymberis Scuro |
| collection | DOAJ |
| description | After a loss of coolant accident (LOCA), fuel rods may balloon. The swelling can partially block the flow channel, affecting the coolability during reflood phase. In order to analyze the influence of blockage length, using a radial blockage of 90%, varying just the blockage length, many steady state numerical simulations has been done using Ansys-CFX code to verify thermal-hydraulic properties according to different forced cooled conditions. Temperature peaks are observed on cladding, followed by a temperature drop. A 5x5 fuel assembly, with 9 centered ballooned fuel rod, flow redistribution inside channels can also be captured, indicating an overheating zone. Therefore, this study conclude, for the same boundary conditions, the longer the blockage length originated after LOCA events, the higher are the clad temperatures, indicating the possibility of overheat during transient conditions on reflood. |
| format | Article |
| id | doaj-art-4c691f28300b41ce965daf7c7aa76c06 |
| institution | Kabale University |
| issn | 2319-0612 |
| language | English |
| publishDate | 2019-06-01 |
| publisher | Brazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR) |
| record_format | Article |
| series | Brazilian Journal of Radiation Sciences |
| spelling | doaj-art-4c691f28300b41ce965daf7c7aa76c062025-08-20T03:51:04ZengBrazilian Radiation Protection Society (Sociedade Brasileira de Proteção Radiológica, SBPR)Brazilian Journal of Radiation Sciences2319-06122019-06-0172B (Suppl.)10.15392/bjrs.v7i2B.437334A CFD analysis of blockage length on a partially blocked fuel rodNikolas Lymberis Scuro0Pedro Ernesto Umbehaun1Edvaldo Angelo2Gabriel Angelo3Delvonei Alves de Andrade4Instituto de Pesquisas Energéticas e Nucleares, Avenida Lineu Prestes, 2242, Centro de Engenharia Nuclear, Zip Code 05508-000, São Paulo, SP, BrazilInstituto de Pesquisas Energéticas e Nucleares, Avenida Lineu Prestes, 2242, Centro de Engenharia Nuclear, Zip Code 05508-000, São Paulo, SP, BrazilUniversidade Presbiteriana Mackenzie, Rua da Consolação, 930, Zip Code 01302-907, São Paulo, SP, BrazilCentro Universitário FEI, Avenida Humberto de Alencar Castelo Branco, 3972-B, Zip Code 09850-901, São Bernardo do Campo, SP, Brazil Instituto de Pesquisas Energéticas e Nucleares, Avenida Lineu Prestes, 2242, Centro de Engenharia Nuclear, Zip Code 05508-000, São Paulo, SP, BrazilInstituto de Pesquisas Energéticas e Nucleares, Avenida Lineu Prestes, 2242, Centro de Engenharia Nuclear, Zip Code 05508-000, São Paulo, SP, BrazilAfter a loss of coolant accident (LOCA), fuel rods may balloon. The swelling can partially block the flow channel, affecting the coolability during reflood phase. In order to analyze the influence of blockage length, using a radial blockage of 90%, varying just the blockage length, many steady state numerical simulations has been done using Ansys-CFX code to verify thermal-hydraulic properties according to different forced cooled conditions. Temperature peaks are observed on cladding, followed by a temperature drop. A 5x5 fuel assembly, with 9 centered ballooned fuel rod, flow redistribution inside channels can also be captured, indicating an overheating zone. Therefore, this study conclude, for the same boundary conditions, the longer the blockage length originated after LOCA events, the higher are the clad temperatures, indicating the possibility of overheat during transient conditions on reflood.https://bjrs.org.br/revista/index.php/REVISTA/article/view/437partially blocked fuel rodcfdansys cfx |
| spellingShingle | Nikolas Lymberis Scuro Pedro Ernesto Umbehaun Edvaldo Angelo Gabriel Angelo Delvonei Alves de Andrade A CFD analysis of blockage length on a partially blocked fuel rod Brazilian Journal of Radiation Sciences partially blocked fuel rod cfd ansys cfx |
| title | A CFD analysis of blockage length on a partially blocked fuel rod |
| title_full | A CFD analysis of blockage length on a partially blocked fuel rod |
| title_fullStr | A CFD analysis of blockage length on a partially blocked fuel rod |
| title_full_unstemmed | A CFD analysis of blockage length on a partially blocked fuel rod |
| title_short | A CFD analysis of blockage length on a partially blocked fuel rod |
| title_sort | cfd analysis of blockage length on a partially blocked fuel rod |
| topic | partially blocked fuel rod cfd ansys cfx |
| url | https://bjrs.org.br/revista/index.php/REVISTA/article/view/437 |
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