Containment Depressurization Capabilities of Filtered Venting System in 1000 MWe PWR with Large Dry Containment
After the Fukushima Daiichi nuclear power plant accident, the Korean government and nuclear industries performed comprehensive safety inspections on all domestic nuclear power plants against beyond design bases events. As a result, a total of 50 recommendations were defined as safety improvement act...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2014/841895 |
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| _version_ | 1832548062023647232 |
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| author | Sang-Won Lee Tae-Hyub Hong Yu-Jung Choi Mi-Ro Seo Hyeong-Taek Kim |
| author_facet | Sang-Won Lee Tae-Hyub Hong Yu-Jung Choi Mi-Ro Seo Hyeong-Taek Kim |
| author_sort | Sang-Won Lee |
| collection | DOAJ |
| description | After the Fukushima Daiichi nuclear power plant accident, the Korean government and nuclear industries performed comprehensive safety inspections on all domestic nuclear power plants against beyond design bases events. As a result, a total of 50 recommendations were defined as safety improvement action items. One of them is installation of a containment filtered venting system (CFVS) or portable backup containment spray system. In this paper, the applicability of CFVS is examined for OPR1000, a 1000 MWe PWR with large dry containment in Korea. Thermohydraulic analysis results show that a filtered discharge flow rate of 15 [kg/s] at 0.9 [MPa] is sufficient to depressurize the containment against representative containment overpressurization scenarios. Radiological release to the environment is reduced to 10-3 considering the decontamination factor. Also, this cyclic venting strategy reduces noble gas release by 50% for 7 days. The probability of maintaining the containment integrity in level 2 probabilistic safety assessment (PSA) initiating events is improved twofold, from 43% to 87%. So, the CFVS can further improve the containment integrity in severe accident conditions. |
| format | Article |
| id | doaj-art-690d5ed63821441fa56d53e56945347a |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-690d5ed63821441fa56d53e56945347a2025-02-03T06:42:24ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832014-01-01201410.1155/2014/841895841895Containment Depressurization Capabilities of Filtered Venting System in 1000 MWe PWR with Large Dry ContainmentSang-Won Lee0Tae-Hyub Hong1Yu-Jung Choi2Mi-Ro Seo3Hyeong-Taek Kim4Korea Hydro and Nuclear Power, Central Research Institute, 70 Gil, Yuseong-Daero 1312, Yuseong-Gu, Daejeon 305-343, Republic of KoreaKorea Hydro and Nuclear Power, Central Research Institute, 70 Gil, Yuseong-Daero 1312, Yuseong-Gu, Daejeon 305-343, Republic of KoreaKorea Hydro and Nuclear Power, Central Research Institute, 70 Gil, Yuseong-Daero 1312, Yuseong-Gu, Daejeon 305-343, Republic of KoreaKorea Hydro and Nuclear Power, Central Research Institute, 70 Gil, Yuseong-Daero 1312, Yuseong-Gu, Daejeon 305-343, Republic of KoreaKorea Hydro and Nuclear Power, Central Research Institute, 70 Gil, Yuseong-Daero 1312, Yuseong-Gu, Daejeon 305-343, Republic of KoreaAfter the Fukushima Daiichi nuclear power plant accident, the Korean government and nuclear industries performed comprehensive safety inspections on all domestic nuclear power plants against beyond design bases events. As a result, a total of 50 recommendations were defined as safety improvement action items. One of them is installation of a containment filtered venting system (CFVS) or portable backup containment spray system. In this paper, the applicability of CFVS is examined for OPR1000, a 1000 MWe PWR with large dry containment in Korea. Thermohydraulic analysis results show that a filtered discharge flow rate of 15 [kg/s] at 0.9 [MPa] is sufficient to depressurize the containment against representative containment overpressurization scenarios. Radiological release to the environment is reduced to 10-3 considering the decontamination factor. Also, this cyclic venting strategy reduces noble gas release by 50% for 7 days. The probability of maintaining the containment integrity in level 2 probabilistic safety assessment (PSA) initiating events is improved twofold, from 43% to 87%. So, the CFVS can further improve the containment integrity in severe accident conditions.http://dx.doi.org/10.1155/2014/841895 |
| spellingShingle | Sang-Won Lee Tae-Hyub Hong Yu-Jung Choi Mi-Ro Seo Hyeong-Taek Kim Containment Depressurization Capabilities of Filtered Venting System in 1000 MWe PWR with Large Dry Containment Science and Technology of Nuclear Installations |
| title | Containment Depressurization Capabilities of Filtered Venting System in 1000 MWe PWR with Large Dry Containment |
| title_full | Containment Depressurization Capabilities of Filtered Venting System in 1000 MWe PWR with Large Dry Containment |
| title_fullStr | Containment Depressurization Capabilities of Filtered Venting System in 1000 MWe PWR with Large Dry Containment |
| title_full_unstemmed | Containment Depressurization Capabilities of Filtered Venting System in 1000 MWe PWR with Large Dry Containment |
| title_short | Containment Depressurization Capabilities of Filtered Venting System in 1000 MWe PWR with Large Dry Containment |
| title_sort | containment depressurization capabilities of filtered venting system in 1000 mwe pwr with large dry containment |
| url | http://dx.doi.org/10.1155/2014/841895 |
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