Thermalhydraulics of advanced 37-element fuel bundle in crept pressure tubes
A CANDU-6 reactor, which has 380 fuel channels of a pressure tube type, is suffering from aging or creep of the pressure tubes. Most of the aging effects for the CANDU primary heat transport system were originated from the horizontal crept pressure tubes. As the operating years of a CANDU reactor pr...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2016-01-01
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| Series: | EPJ Nuclear Sciences & Technologies |
| Online Access: | http://dx.doi.org/10.1051/epjn/2016010 |
| _version_ | 1818351646171725824 |
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| author | Park Joo Hwan Song Yong Mann |
| author_facet | Park Joo Hwan Song Yong Mann |
| author_sort | Park Joo Hwan |
| collection | DOAJ |
| description | A CANDU-6 reactor, which has 380 fuel channels of a pressure tube type, is suffering from aging or creep of the pressure tubes. Most of the aging effects for the CANDU primary heat transport system were originated from the horizontal crept pressure tubes. As the operating years of a CANDU reactor proceed, a pressure tube experiences high neutron irradiation damage under high temperature and pressure. The crept pressure tube can deteriorate the Critical Heat Flux (CHF) of a fuel channel and finally worsen the reactor operating performance and thermal margin. Recently, the modification of the central subchannel area with increasing inner pitch length of a standard 37-element fuel bundle was proposed and studied in terms of the dryout power enhancement for the uncrept pressure tube since a standard 37-element fuel bundle has a relatively small flow area and high flow resistance at the central region. This study introduced a subchannel analysis for the crept pressure tubes loaded with the inner pitch length modification of a standard 37-element fuel bundle. In addition, the subchannel characteristics were investigated according to the flow area change of the center subchannels for the crept pressure tubes. Also, it was discussed how much the crept pressure tubes affected the thermalhydraulic characteristics of the fuel channel as well as the dryout power for the modification of a standard 37-element fuel bundle. |
| first_indexed | 2024-12-13T18:41:03Z |
| format | Article |
| id | doaj.art-d85114213c6349cbba7ccf9aadd39afe |
| institution | Directory Open Access Journal |
| issn | 2491-9292 |
| language | English |
| last_indexed | 2024-12-13T18:41:03Z |
| publishDate | 2016-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Nuclear Sciences & Technologies |
| spelling | doaj.art-d85114213c6349cbba7ccf9aadd39afe2022-12-21T23:35:14ZengEDP SciencesEPJ Nuclear Sciences & Technologies2491-92922016-01-0121610.1051/epjn/2016010epjn150062Thermalhydraulics of advanced 37-element fuel bundle in crept pressure tubesPark Joo HwanSong Yong MannA CANDU-6 reactor, which has 380 fuel channels of a pressure tube type, is suffering from aging or creep of the pressure tubes. Most of the aging effects for the CANDU primary heat transport system were originated from the horizontal crept pressure tubes. As the operating years of a CANDU reactor proceed, a pressure tube experiences high neutron irradiation damage under high temperature and pressure. The crept pressure tube can deteriorate the Critical Heat Flux (CHF) of a fuel channel and finally worsen the reactor operating performance and thermal margin. Recently, the modification of the central subchannel area with increasing inner pitch length of a standard 37-element fuel bundle was proposed and studied in terms of the dryout power enhancement for the uncrept pressure tube since a standard 37-element fuel bundle has a relatively small flow area and high flow resistance at the central region. This study introduced a subchannel analysis for the crept pressure tubes loaded with the inner pitch length modification of a standard 37-element fuel bundle. In addition, the subchannel characteristics were investigated according to the flow area change of the center subchannels for the crept pressure tubes. Also, it was discussed how much the crept pressure tubes affected the thermalhydraulic characteristics of the fuel channel as well as the dryout power for the modification of a standard 37-element fuel bundle.http://dx.doi.org/10.1051/epjn/2016010 |
| spellingShingle | Park Joo Hwan Song Yong Mann Thermalhydraulics of advanced 37-element fuel bundle in crept pressure tubes EPJ Nuclear Sciences & Technologies |
| title | Thermalhydraulics of advanced 37-element fuel bundle in crept pressure tubes |
| title_full | Thermalhydraulics of advanced 37-element fuel bundle in crept pressure tubes |
| title_fullStr | Thermalhydraulics of advanced 37-element fuel bundle in crept pressure tubes |
| title_full_unstemmed | Thermalhydraulics of advanced 37-element fuel bundle in crept pressure tubes |
| title_short | Thermalhydraulics of advanced 37-element fuel bundle in crept pressure tubes |
| title_sort | thermalhydraulics of advanced 37 element fuel bundle in crept pressure tubes |
| url | http://dx.doi.org/10.1051/epjn/2016010 |
| work_keys_str_mv | AT parkjoohwan thermalhydraulicsofadvanced37elementfuelbundleincreptpressuretubes AT songyongmann thermalhydraulicsofadvanced37elementfuelbundleincreptpressuretubes |