Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems
The behaviour of a parallel-channel natural circulation boiling water reactor under a low-pressure low-power startup condition has been studied numerically (using RELAP5) and compared with its scaled model. The parallel-channel RELAP5 model is an extension of a single-channel model developed and val...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2010-01-01
|
| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2010/574195 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832565222780436480 |
|---|---|
| author | S. P. Lakshmanan Manmohan Pandey |
| author_facet | S. P. Lakshmanan Manmohan Pandey |
| author_sort | S. P. Lakshmanan |
| collection | DOAJ |
| description | The behaviour of a parallel-channel natural circulation boiling water reactor under a low-pressure low-power startup condition has been studied numerically (using RELAP5) and compared with its scaled model. The parallel-channel RELAP5 model is an extension of a single-channel model developed and validated with experimental results. Existence of in-phase and out-of-phase flashing instabilities in the parallel-channel systems is investigated through simulations under equal and unequal power boundary conditions in the channels. The effect of flow resistance on Type-I oscillations is explored. For nonidentical condition in the channels, the flow fluctuations in the parallel-channel systems are found to be out-of-phase. |
| format | Article |
| id | doaj-art-377e81ed69c3474c8c0f1f372ce99658 |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-377e81ed69c3474c8c0f1f372ce996582025-02-03T01:08:55ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832010-01-01201010.1155/2010/574195574195Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling SystemsS. P. Lakshmanan0Manmohan Pandey1Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, IndiaDepartment of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, IndiaThe behaviour of a parallel-channel natural circulation boiling water reactor under a low-pressure low-power startup condition has been studied numerically (using RELAP5) and compared with its scaled model. The parallel-channel RELAP5 model is an extension of a single-channel model developed and validated with experimental results. Existence of in-phase and out-of-phase flashing instabilities in the parallel-channel systems is investigated through simulations under equal and unequal power boundary conditions in the channels. The effect of flow resistance on Type-I oscillations is explored. For nonidentical condition in the channels, the flow fluctuations in the parallel-channel systems are found to be out-of-phase.http://dx.doi.org/10.1155/2010/574195 |
| spellingShingle | S. P. Lakshmanan Manmohan Pandey Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems Science and Technology of Nuclear Installations |
| title | Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems |
| title_full | Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems |
| title_fullStr | Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems |
| title_full_unstemmed | Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems |
| title_short | Numerical Investigation of Startup Instabilities in Parallel-Channel Natural Circulation Boiling Systems |
| title_sort | numerical investigation of startup instabilities in parallel channel natural circulation boiling systems |
| url | http://dx.doi.org/10.1155/2010/574195 |
| work_keys_str_mv | AT splakshmanan numericalinvestigationofstartupinstabilitiesinparallelchannelnaturalcirculationboilingsystems AT manmohanpandey numericalinvestigationofstartupinstabilitiesinparallelchannelnaturalcirculationboilingsystems |