Prediction of radioactivity releases for a Long-Term Station Blackout event in the VVER-1200 nuclear reactor of Bangladesh
Consequences of an anticipated Beyond Design Basis Accident (BDBA) Long-Term Station Blackout (LTSBO) event with complete loss of grid power in the VVER-1200 reactor of Rooppur Nuclear Power Plant (NPP) of Unit-1 are assessed using the RASCAL 4.3 code. This study estimated the released radionuclides...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573322004685 |
| _version_ | 1797897327665479680 |
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| author | Shafiqul Islam Faisal Md Shafiqul Islam Md Abdul Malek Soner |
| author_facet | Shafiqul Islam Faisal Md Shafiqul Islam Md Abdul Malek Soner |
| author_sort | Shafiqul Islam Faisal |
| collection | DOAJ |
| description | Consequences of an anticipated Beyond Design Basis Accident (BDBA) Long-Term Station Blackout (LTSBO) event with complete loss of grid power in the VVER-1200 reactor of Rooppur Nuclear Power Plant (NPP) of Unit-1 are assessed using the RASCAL 4.3 code. This study estimated the released radionuclides, received public radiological dose, and ground surface concentration considering 3 accident scenarios of International Nuclear and Radiological Event Scale (INES) level 7 and two meteorological conditions. Atmospheric transport, dispersion, and deposition processes of released radionuclides are simulated using a straight-line trajectory Gaussian plume model for short distances and a Gaussian puff model for long distances. Total Effective Dose Equivalent (TEDE) to the public within 40 km and radionuclides contribution for three-dose pathways of inhalation, cloudshine, and groundshine owing to airborne releases are evaluated considering with and without passive safety Emergency Core Cooling System (ECCS) in dry (winter) and wet (monsoon) seasons. Source term and their release rates are varied with the functional duration of passive safety ECCS. In three accident scenarios, the TEDE of 10 mSv and above are confined to 8 km and 2 km for the wet and dry seasons, respectively in the downwind direction. The groundshine dose is the most dominating in the wet season while the inhalation dose is in the dry season. Total received doses and surface concentration in the wet season near the plant are higher than those in the dry season due to the deposition effect of rain on the radioactive substances. |
| first_indexed | 2024-04-10T07:56:50Z |
| format | Article |
| id | doaj.art-d1eb38cbfd544055a11db66b3b48563b |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-04-10T07:56:50Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-d1eb38cbfd544055a11db66b3b48563b2023-02-23T04:30:41ZengElsevierNuclear Engineering and Technology1738-57332023-02-01552696706Prediction of radioactivity releases for a Long-Term Station Blackout event in the VVER-1200 nuclear reactor of BangladeshShafiqul Islam Faisal0Md Shafiqul Islam1Md Abdul Malek Soner2Bangladesh Atomic Energy Regulatory Authority, E-12/A, Shahid Shahabuddin Shorok, Agargaon, Dhaka, 1207, Bangladesh; Department of Nuclear Engineering, University of Dhaka, Curzon Hall, Dhaka, 1000, BangladeshDepartment of Nuclear Engineering, University of Dhaka, Curzon Hall, Dhaka, 1000, Bangladesh; Corresponding author.Bangladesh Atomic Energy Commission, Atomic Energy Research Establishment, Center for Research Reactor, Ganakbari, Savar, Dhaka, 3787, BangladeshConsequences of an anticipated Beyond Design Basis Accident (BDBA) Long-Term Station Blackout (LTSBO) event with complete loss of grid power in the VVER-1200 reactor of Rooppur Nuclear Power Plant (NPP) of Unit-1 are assessed using the RASCAL 4.3 code. This study estimated the released radionuclides, received public radiological dose, and ground surface concentration considering 3 accident scenarios of International Nuclear and Radiological Event Scale (INES) level 7 and two meteorological conditions. Atmospheric transport, dispersion, and deposition processes of released radionuclides are simulated using a straight-line trajectory Gaussian plume model for short distances and a Gaussian puff model for long distances. Total Effective Dose Equivalent (TEDE) to the public within 40 km and radionuclides contribution for three-dose pathways of inhalation, cloudshine, and groundshine owing to airborne releases are evaluated considering with and without passive safety Emergency Core Cooling System (ECCS) in dry (winter) and wet (monsoon) seasons. Source term and their release rates are varied with the functional duration of passive safety ECCS. In three accident scenarios, the TEDE of 10 mSv and above are confined to 8 km and 2 km for the wet and dry seasons, respectively in the downwind direction. The groundshine dose is the most dominating in the wet season while the inhalation dose is in the dry season. Total received doses and surface concentration in the wet season near the plant are higher than those in the dry season due to the deposition effect of rain on the radioactive substances.http://www.sciencedirect.com/science/article/pii/S1738573322004685RadionuclidesLong-term station blackoutTotal effective dose equivalentGroundshine doseRASCAL4.3 |
| spellingShingle | Shafiqul Islam Faisal Md Shafiqul Islam Md Abdul Malek Soner Prediction of radioactivity releases for a Long-Term Station Blackout event in the VVER-1200 nuclear reactor of Bangladesh Nuclear Engineering and Technology Radionuclides Long-term station blackout Total effective dose equivalent Groundshine dose RASCAL4.3 |
| title | Prediction of radioactivity releases for a Long-Term Station Blackout event in the VVER-1200 nuclear reactor of Bangladesh |
| title_full | Prediction of radioactivity releases for a Long-Term Station Blackout event in the VVER-1200 nuclear reactor of Bangladesh |
| title_fullStr | Prediction of radioactivity releases for a Long-Term Station Blackout event in the VVER-1200 nuclear reactor of Bangladesh |
| title_full_unstemmed | Prediction of radioactivity releases for a Long-Term Station Blackout event in the VVER-1200 nuclear reactor of Bangladesh |
| title_short | Prediction of radioactivity releases for a Long-Term Station Blackout event in the VVER-1200 nuclear reactor of Bangladesh |
| title_sort | prediction of radioactivity releases for a long term station blackout event in the vver 1200 nuclear reactor of bangladesh |
| topic | Radionuclides Long-term station blackout Total effective dose equivalent Groundshine dose RASCAL4.3 |
| url | http://www.sciencedirect.com/science/article/pii/S1738573322004685 |
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