보고서 정보
주관연구기관 |
한국원자력안전기술원 Korea Institute of Nuclear Safety |
보고서유형 | 1단계보고서 |
발행국가 | 대한민국 |
언어 |
한국어
|
발행년월 | 2013-04 |
과제시작연도 |
2012 |
주관부처 |
미래창조과학부 Ministry of Science, ICT and Future Planning |
등록번호 |
TRKO201400011531 |
과제고유번호 |
1345175776 |
사업명 |
방사선안전기술개발사업 |
DB 구축일자 |
2014-07-05
|
키워드 |
동해.방사능.해수.해저퇴적물.중간수역.방사성폐기물.East Sea.Radioactivity.Seawater.Sediment.Intermediate Zone.Radioactive Waste.
|
초록
- 한국과 일본의 중간수역에서 해수 채수 및 해저퇴적물 채취
- 시료의 전처리 및 방사능(137Cs 60Co, 90Sr, 239+240Pu) 분석
- 해수증 방사능 농도의 핵종별, 연직별 특성조사
- 해저퇴적물중 방사능농도의 핵종별 특성조사
- 과거 방사능 조사결과와 비교하여 러시아가 투기한 방사성 핵폐기물의 영향 확인
- 방사능조사자료는 국가환경방사능자료관리시스템에서 관리
Abstract
▼
IV. Results
Radioactivity in Seawater and Seabed Sediment
Waters and sediments were collected on board by the Research Vessel "Haeyang 2000" of the Korea Hydrographic and Oceanographic Administration (KHOA) in Korea from September, 2010 to October, 2011. Korea Institute of Nuclear Safety (KINS
IV. Results
Radioactivity in Seawater and Seabed Sediment
Waters and sediments were collected on board by the Research Vessel "Haeyang 2000" of the Korea Hydrographic and Oceanographic Administration (KHOA) in Korea from September, 2010 to October, 2011. Korea Institute of Nuclear Safety (KINS) received the samples from KHOA and analyzed the radionuclide concentration in the samples.
In 2010 year, 137Cs, 60Co, 90Sr, 239+240Pu concentrations in seawaters were founded to be in range of 0.218~1.87 mBq/L, <0.964 mBq/L, 0.322~1.51 mBq/L, 1.76~26.9 μBq/L, respectively. The mean of concentrations 239+240Pu were lower than that of 137Cs and 90Sr. In case of depth profile of radionuclides, the concentration of 230+240Pu showed the lowest value at the surface layer, followed by a increasing trend with depth from surface to 1000 m, the maximum value at 1000 m depth, and a slight decreasing trend with depth below 1000 m depth, whereas the concentrations of 137Cs and 90Sr showed decreasing trends with depth. These trends of the depth profile of the radionuclide were similar in all sampling stations.
137Cs, 60Co, 90Sr, 239+240Pu concentrations in sediments was found to be in the range of 3.36~6.03 Bq/kg·dry, <2.05 Bq/kg·dry, 0.447~1.01 Bq/kg·dry, 0.801~1.44 Bq/kg·dry, respectively. 137Cs concentrations were higher than 90Sr and 239+240Pu concentrations.
137Cs, 90Sr and 239+240Pu concentrations at the station 6 are higher than those of station at 1, 3, 5.
In 2011 year, 137Cs, 60Co, 90Sr, 239+240Pu concentrations in seawaters was founded to be in range of 0.335~2.38 mBq/L, <0.786 mBq/L, 0.170~1.25 mBq/L, 1.98~25.1 μBq/L, respectively. The mean of concentrations 137Cs, 90Sr and 239+240Pu from 38 samples were 1.13 mBq/L, 0.805 mBq/L, and 17.2 μBq/L, respectively. The concentrations of 60Co in all samples were below the detection limits. In the depth profile of 137Cs, 90Sr concentrations are high the upper (0~500 m depth) and decreased with increasing depth. 239+240Pu concentration by depth in 2010 was similar to the pattern of variation. The depth distributions of radionuclide concentration were similar to those observed in all stations. 137Cs, 60Co, 90Sr, 239+240Pu concentrations in sediments was found to be in the range of 2.56~6.35 Bq/kg·dry, <1.60 Bq/kg·dry, 0.110~0.397Bq/kg·dry, 0.488~1.38 Bq/kg·dry, respectively. 137Cs concentrations were higher than 90Sr, 239+240Pu concentrations.
137Cs, 90Sr, 239+240Pu concentrations at the station 6 are higher than those of station at 1, 3, 5.
Evaluation the Impacts for the Radioactive Wastes
137Cs, 90Sr, 239+240Pu concentrations in seawater from 2010 to 2011 were 0.218~2.38 mBq/L, 0.170~1.51 mBq/L, 1.76~26.9 μBq/L, respectively. 137Cs, 90Sr, 239+240Pu concentrations in seawater in the 3-nations joint investigation from 1994 to 1995 were found to be in the range of 0.53~3.72 mBq/L, 0.40~2.75 mBq/L, 2.0~39.8 μBq/L, respectively. 137Cs, 90Sr, 239+240Pu concentrations in Korean-Japanese joint investigation between 2006 and 2009 were 0.310~2.52 mBq/L, 0.082~1.53 mBq/L, 2.20~33.4 μBq/L, respectively. The concentrations of radionuclides have been obtained to be lower than those reported on the previous studies of 3-nations joint expedition and 2-nations joint expedition.
137Cs, 90Sr, 239+240Pu concentrations in sediment from 2010 to 2011 were 2.56~6.35 Bq/kg·dry, 0.110~1.01 Bq/kg·dry, 0.488~1.44 Bq/kg·dry, respectively. 137Cs, 90Sr, 239+240Pu concentrations in seawater in the 3-nations joint investigation were found to be in the range of <0.97~2.76 Bq/kg·dry, <0.14~0.75 Bq/kg·dry, 0.323~1.81 Bq/kg'dry, respectively. 137Cs, 90Sr and 239+240Pu concentrations in 2-nations joint investigation were 0.71~5.67 Bq/kg·dry, 0.182~0.985 Bq/kg·dry, 0.00899~1.76 Bqlkg·dry, respectively. The concentrations of radionuclides have been obtained to be similar to those reported on the previous studies of 3-nations joint expedition and 2-nations joint expedition.
The radionuclide inventories estimated from vertical profiles and sediment data indicate the absences of any significant anthropogenic other than global fallout. This results showed that the radionuclide concentrations in seawater and seabed sediment samples collected between 2010 and 2011 were not significantly different compared to those of previous survey.
Control for the results of the radionuclides analysis
Seawater and seabed sediment were collected on board by research vessel in KHOA. The sampling process was observed by staffs of Japan Coast Guard on board. The sampling process by Japan was also observed by staffs of KINS. Sample preparation and analysis procedures used in this study were equal to radioactive analysis procedures used in 3-nations and 2-nations joint expedition by KINS. There was no difference of radioactive concentrations performed by Korea and Japan if considering measurement uncertainty. Environmental radioactivity data was managed with a database(D/B) in CLEAN System to maintain and control the quality.
목차 Contents
- 표지 ... 1
- 제 출 문 ... 5
- 보고서 요약서 ... 7
- 요 약 문 ... 9
- SUMMARY ... 13
- Contents ... 17
- 목차 ... 19
- 표 목차 ... 21
- 그림 목차 ... 23
- 제1장 연구개발과제의 개요 ... 25
- 제2장 국내외 기술개발현황 ... 26
- 제1절 국내 현황 ... 26
- 제2절 국외 현황 ... 26
- 제3장 연구개발 수행 내용 및 결과 ... 27
- 제1절 서론 ... 27
- 제2절 조사개요 ... 29
- 제3절 시료 채취 및 전처리 ... 31
- 제4절 방사능 분석방법 ... 32
- 제5절 조사결과 ... 35
- 제6절 결론 ... 49
- 제4장 목표 달성도 및 관련분야 기여도 ... 50
- 제5장 연구개발 결과의 활용계획 ... 51
- 제6장 참고 문헌 ... 52
- RESULT OF 5th KOREAN-JAPANESE JOINT EXPEDITION ... 53
- RESULT OF 6th KOREAN-JAPANESE JOINT EXPEDITION ... 72
- 끝페이지 ... 94
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