Analysis of the Natural Convection Flow in the Upper Plenum of the MONJU Reactor with Trio_U
The IAEA has coordinated a benchmark project on natural convection phenomena in the upper plenum of the MONJU reactor. JAEA has provided both detailed geometrical data of the plant and complete thermalhydraulic boundary conditions describing a pump trip transient, accomplished during the start-up ex...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2013-01-01
|
| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2013/987197 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850216861955784704 |
|---|---|
| author | Ulrich Bieder Gauthier Fauchet |
| author_facet | Ulrich Bieder Gauthier Fauchet |
| author_sort | Ulrich Bieder |
| collection | DOAJ |
| description | The IAEA has coordinated a benchmark project on natural convection phenomena in the upper plenum of the MONJU reactor. JAEA has provided both detailed geometrical data of the plant and complete thermalhydraulic boundary conditions describing a pump trip transient, accomplished during the start-up experiments of the reactor. For the initial conditions of the pump trip transient, extensive sensitivity analyses have been made with the CFD code Trio_U. These calculations show a high sensitivity of the global flow pattern in the MONJU upper plenum depending on the initial order of the numerical scheme and the modelling of the geometrically complex upper core structure. During the pump trip, the formation of a thermal stratification within the plenum has been observed which persists for almost two hours. All calculations have shown a homogenization of the temperature in the plenum after about 15 minutes. A slight reduction of the mixing in the upper plenum could have been achieved by modifying the form of the flow holes in the inner barrel (fillets instead of sharp edges) in order to reduce their axial pressure loss. |
| format | Article |
| id | doaj-art-2f2b23bfc4cc430d8bc3eee6b0113c77 |
| institution | OA Journals |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-2f2b23bfc4cc430d8bc3eee6b0113c772025-08-20T02:08:12ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832013-01-01201310.1155/2013/987197987197Analysis of the Natural Convection Flow in the Upper Plenum of the MONJU Reactor with Trio_UUlrich Bieder0Gauthier Fauchet1Commissariat à l’Energie Atomique et aux Energies Alternatives, 91190 Gif-sur-Yvette, FranceCommissariat à l’Energie Atomique et aux Energies Alternatives, 91190 Gif-sur-Yvette, FranceThe IAEA has coordinated a benchmark project on natural convection phenomena in the upper plenum of the MONJU reactor. JAEA has provided both detailed geometrical data of the plant and complete thermalhydraulic boundary conditions describing a pump trip transient, accomplished during the start-up experiments of the reactor. For the initial conditions of the pump trip transient, extensive sensitivity analyses have been made with the CFD code Trio_U. These calculations show a high sensitivity of the global flow pattern in the MONJU upper plenum depending on the initial order of the numerical scheme and the modelling of the geometrically complex upper core structure. During the pump trip, the formation of a thermal stratification within the plenum has been observed which persists for almost two hours. All calculations have shown a homogenization of the temperature in the plenum after about 15 minutes. A slight reduction of the mixing in the upper plenum could have been achieved by modifying the form of the flow holes in the inner barrel (fillets instead of sharp edges) in order to reduce their axial pressure loss.http://dx.doi.org/10.1155/2013/987197 |
| spellingShingle | Ulrich Bieder Gauthier Fauchet Analysis of the Natural Convection Flow in the Upper Plenum of the MONJU Reactor with Trio_U Science and Technology of Nuclear Installations |
| title | Analysis of the Natural Convection Flow in the Upper Plenum of the MONJU Reactor with Trio_U |
| title_full | Analysis of the Natural Convection Flow in the Upper Plenum of the MONJU Reactor with Trio_U |
| title_fullStr | Analysis of the Natural Convection Flow in the Upper Plenum of the MONJU Reactor with Trio_U |
| title_full_unstemmed | Analysis of the Natural Convection Flow in the Upper Plenum of the MONJU Reactor with Trio_U |
| title_short | Analysis of the Natural Convection Flow in the Upper Plenum of the MONJU Reactor with Trio_U |
| title_sort | analysis of the natural convection flow in the upper plenum of the monju reactor with trio u |
| url | http://dx.doi.org/10.1155/2013/987197 |
| work_keys_str_mv | AT ulrichbieder analysisofthenaturalconvectionflowintheupperplenumofthemonjureactorwithtriou AT gauthierfauchet analysisofthenaturalconvectionflowintheupperplenumofthemonjureactorwithtriou |