Condition of 137Cs Activity in Karimunjawa Waters and its Distribution When an NPP Jepara is Operated
Karimunjawa islands are located in the middle of the Java Sea, approximately 83 km northwest of Jepara city. These islands have become an Indonesian marine tourism destination and since 2001 had been designated as a national park. The Indonesian government has chosen Muria peninsula in the district...
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| Format: | Article |
| Language: | English |
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Diponegoro University; Association of Indonesian Coastal Management Experts
2016-09-01
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| Series: | Ilmu Kelautan |
| Online Access: | http://ejournal.undip.ac.id/index.php/ijms/article/view/11315 |
| _version_ | 1819177056535052288 |
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| author | Muslim Muslim Heny Suseno Siti Saodah |
| author_facet | Muslim Muslim Heny Suseno Siti Saodah |
| author_sort | Muslim Muslim |
| collection | DOAJ |
| description | Karimunjawa islands are located in the middle of the Java Sea, approximately 83 km northwest of Jepara city. These islands have become an Indonesian marine tourism destination and since 2001 had been designated as a national park. The Indonesian government has chosen Muria peninsula in the district of Jepara, Indonesia as a site for a potential nuclear power plant (NPP). The purpose of this study was to determine the current level of radiocesium (137Cs) activity and forecast its spread if an NPP is operated at Jepara. To determine the distribution of 137Cs in Karimunjawa waters, a sampling of water was done in six stations. Simulation modeling was used to map the distribution of 137Cs should an NPP be constructed in Jepara. The results showed that 137Cs activity in Karimunjawa waters ranges from 0.12 to 0.39 mBq.L-1 with an average of 0.24 mBq.L-1. This value is slightly higher than previous studies in the coastal waters of Gresik, which had an average activity of 0.200 mBq.L-1 because the waters around Karimunjawa have a lower dilution rate than the coastal waters of Gresik. However, these values were considerably lower than those in the waters of Northeast Japan before the Fukushima nuclear power plant accident which registered 137Cs activity at 2-3 mBq.L-1.This indicates that 137Cs in Karimunjawa is not entirely from Fukushima rather from the global fallout. The 137Cs distribution model suggests that after 15 days, a leakage in the Muria Peninsula nuclear plant will not contaminate Karimunjawa waters because the current in the Java Sea is relatively weak and dominant in the westward direction. Thus, when an NPP leak only runs for 15 days, Karimunjawa waters remain safe.
Keyword: 137Cs, Karimunjawa, NPP, modeling, Muria Peninsula |
| first_indexed | 2024-12-22T21:20:35Z |
| format | Article |
| id | doaj.art-b2b45e04576e47029c47d418758e86d6 |
| institution | Directory Open Access Journal |
| issn | 0853-7291 2406-7598 |
| language | English |
| last_indexed | 2024-12-22T21:20:35Z |
| publishDate | 2016-09-01 |
| publisher | Diponegoro University; Association of Indonesian Coastal Management Experts |
| record_format | Article |
| series | Ilmu Kelautan |
| spelling | doaj.art-b2b45e04576e47029c47d418758e86d62022-12-21T18:12:13ZengDiponegoro University; Association of Indonesian Coastal Management ExpertsIlmu Kelautan0853-72912406-75982016-09-0121314315010.14710/ik.ijms.21.3.143-1509883Condition of 137Cs Activity in Karimunjawa Waters and its Distribution When an NPP Jepara is OperatedMuslim Muslim0Heny Suseno1Siti Saodah2Oceanography Study Program, Diponegoro University,Marine Radioecology Group, Center for Radiation Safety Technology and Metrology - National Nuclear Energy AgencyOceanography Study Program, Diponegoro University,Karimunjawa islands are located in the middle of the Java Sea, approximately 83 km northwest of Jepara city. These islands have become an Indonesian marine tourism destination and since 2001 had been designated as a national park. The Indonesian government has chosen Muria peninsula in the district of Jepara, Indonesia as a site for a potential nuclear power plant (NPP). The purpose of this study was to determine the current level of radiocesium (137Cs) activity and forecast its spread if an NPP is operated at Jepara. To determine the distribution of 137Cs in Karimunjawa waters, a sampling of water was done in six stations. Simulation modeling was used to map the distribution of 137Cs should an NPP be constructed in Jepara. The results showed that 137Cs activity in Karimunjawa waters ranges from 0.12 to 0.39 mBq.L-1 with an average of 0.24 mBq.L-1. This value is slightly higher than previous studies in the coastal waters of Gresik, which had an average activity of 0.200 mBq.L-1 because the waters around Karimunjawa have a lower dilution rate than the coastal waters of Gresik. However, these values were considerably lower than those in the waters of Northeast Japan before the Fukushima nuclear power plant accident which registered 137Cs activity at 2-3 mBq.L-1.This indicates that 137Cs in Karimunjawa is not entirely from Fukushima rather from the global fallout. The 137Cs distribution model suggests that after 15 days, a leakage in the Muria Peninsula nuclear plant will not contaminate Karimunjawa waters because the current in the Java Sea is relatively weak and dominant in the westward direction. Thus, when an NPP leak only runs for 15 days, Karimunjawa waters remain safe. Keyword: 137Cs, Karimunjawa, NPP, modeling, Muria Peninsulahttp://ejournal.undip.ac.id/index.php/ijms/article/view/11315 |
| spellingShingle | Muslim Muslim Heny Suseno Siti Saodah Condition of 137Cs Activity in Karimunjawa Waters and its Distribution When an NPP Jepara is Operated Ilmu Kelautan |
| title | Condition of 137Cs Activity in Karimunjawa Waters and its Distribution When an NPP Jepara is Operated |
| title_full | Condition of 137Cs Activity in Karimunjawa Waters and its Distribution When an NPP Jepara is Operated |
| title_fullStr | Condition of 137Cs Activity in Karimunjawa Waters and its Distribution When an NPP Jepara is Operated |
| title_full_unstemmed | Condition of 137Cs Activity in Karimunjawa Waters and its Distribution When an NPP Jepara is Operated |
| title_short | Condition of 137Cs Activity in Karimunjawa Waters and its Distribution When an NPP Jepara is Operated |
| title_sort | condition of 137cs activity in karimunjawa waters and its distribution when an npp jepara is operated |
| url | http://ejournal.undip.ac.id/index.php/ijms/article/view/11315 |
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