제주지역에서 소비되는 식품중 137Cs과 40K 방사능 농도
137Cs and 40K Activities of Foodstuffs Consumed in Jeju
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본 연구는 제주지역에서 소비되는 식품류 중의 137Cs과 40K 방사능 농도를 조사하여, 식품 섭취에 따른 137Cs와 40K에 의한 내부피폭 선량의 값을 평가함으로써 만일의 원자력 사고로 인한 방사능 오염에 대처할 수 있는 기초 자료를 확보하고자 수행하였다. 시료로 채취한 식품류는 농산물 31, 축산물 6, 수산물 12, 임산물 4 그리고 가공식품(차류)이 3종류였고, 방사능 분석은 고순도 게르마늄검출기가 장착된 감마선분광계로 수행하였다. 시료 중 137Cs 방사능 농도범위는 농산물이 MDA이하～650 mBq/kgfresh, 축산물 MDA이하～131 mBq/kgfresh, 임산물 MDA이하～834 mBq/kgfresh, 수산물 MDA이하～253 mBq/kgfresh, 그리고 가공식품은 32.0～483 mBq/kgfresh 이었다. 40K의 경우는 농산물 16.6～542 Bq/kgfresh, 축산물 39.1～294 Bq/kgfresh, 임산물 85.5～116 Bq/kgfresh, 수산물 50.1～657 Bq/kgfresh 그리고 가공식품 33.6～1,065 Bq/kgfresh 범위였다. 시료 중 137Cs 방사능 농도가 가장 높은 것은 표고버섯으로 834 mBq/kgfresh 이었으며, 40K은 커피가 1,065 Bq/kgfresh로 가장 높았다.각 식품류 중 137Cs와 40K에 의한 연간 유효선량은 농산물이 66,543 nSv로 가장 높았고, 축산물 19,311, 가공식품(차류) 6,648, 수산물 6,579 그리고 임산물 860 nSv 순으로 낮았으며, 이것을 모두 합한 총 연간 유효선량 값은 99,941 nSv 이었다. 본 연구에 포함된 식품의 1인당 연간 섭취량이 연간 총 식품 섭취량의 60%임을 감안해도 자연환경 중에서 이루어지는 외부피폭에 의한 연간 유효선량인 2,400,000 nSv에 비하면 무시할 정도여서 평상시 식품섭취에 의한 방사선 내부피폭은 매우 미량이었다.이상의 자료는 유사시 방사선에 의한 식품류 오염정도를 식별하는데 필수불가결할 것으로 사료된다.
Abstract
This work was conducted to provide the reference data of radioactivity in the foodstuffs at a radiological emergency situation in Jeju Island. The sampled foodstuffs were agricultural (31), livestock (6), marine (12) and forest products (4), and processed foods (3) consumed by Jeju Islanders. 137Cs and 40K activi- ties were determined by HPGe γ-ray spectrometry. The activity ranges of 137Cs was <MDA (less than mini- mum detectable activity)～650 mBq/kgfresh in the agricultural products, <MDA～131 mBq/kgfresh in the livestock, <MDA～834 mBq/kgfresh in the forest, <MDA～253 mBq/kgfresh in the marine and 32.0～483 mBq/kgfresh in the processed foods (tea). In case of 40K, the activity was 16.6～542 Bq/kgfresh in the agricultural products, 39.1～294 Bq/kgfresh in the livestock, 85.5～116 Bq/kgfresh in the forest, 50.1～657 Bq/kgfresh in the marine, and 33.6～1,065 Bq/kgfresh in the processed foods (tea). The highest activity of 137Cs, 834 mBq/kgfresh was observed in oak mushroom and 40K, 1,065 Bq/kgfresh in coffee. Annual effec- tive doses of 137Cs and 40K by intake of foodstuffs per capita were the following order; agricultural products (66,543 nSv) > livestock products (19,311 nSv) > processed foods (6,648 nSv) > marine products (6,579 nSv) > forest products (860 nSv). Therefore, total annual effective dose was summed 99,941 nSv which is quite low level comparing to the annual effective dose by external exposure, 2,400,000 nSv. The data obtained in this study can be useful for monitoring whether the foodstuffs are contaminated or not at an emergency radiation accident, and showed that the foodstuffs consumed in Jeju are safe in terms of annual effective dose of 137Cs and 40K.
참고문헌 (21)
- New York, "United Nations Scientific Committee on the Effects of Atomic Radiations" (1982), United Nations
- Oxford, "International Commission on Radiological Protection Radionuclide release into the environment Assessment of doses to man", pp.2~10 (1978), Pergamon Press
- Safety Series No. 57, "Genetic models and parameters for assessing the environmental transfer of radionuclides from routine release", pp.61~65 (1982)
- "Handbook of parameter values for the prediction of radionuclide tra- nsfer in temperate environments", pp.14~26 (1994)
- United Nations Scientific Committee on the Effects of Atomic Radiation, "UNSCEAR 2000 report to the general assembly, with scientific annexes", 1 (2000), United Nat- ions
- Carpenter R. C, "The determ- ination of low levels of radiocaesium and fadioruth- enium in foodstuffs", 173, pp.169~178 (1995)
- 보건복지부, "2001년도 국민건강영양조사", pp.105~ (2002), 보건복지부
- Oxford, "International Commission on Radiological Protection Dose coefficients for intakes of radionuclides by work- ers" (1994), Pergamon Press
- Japan Analysis Chemistry Agency, "Foodstuff radio- activity survey." (1997), Japan Analysis Chemistry Agency
- Djingova R, "Concentration of caes- ium-137, cobalt-60 and potassium-40 in some wild and edible plants around the nuclear power plant in Bulg- aria", 59, pp.61~73 (2002)
- Gomaa. M. A, "Radioactivity in foodstuffs in Egypt.", 46(6), pp.607~608 (1995)
- Badran H. M, "Levels of 137Cs and 40K in edible parts of some vegetables cons- umed in Egypt", 67, pp.181~190 (2003)
- Haselwandter, "Accumulation of the radioactive nuclide 137Cs in fruitbodies of basidiomycetes", pp.713~715 (1978)
- Eckl, "Uptake of natural and man-made radionuclides by lichens and mushrooms", 25, pp.43~54 (1986)
- Wang J. J, "Radioactivity concentrations of 137Cs and 40K in basidiomycetes collected in Taiwan", 49(1), pp.29~34 (1998)
- Muramatsu, "Conce- ntrations of radiocesium and potassium in basidiomy- cetes collected in Japan", 105, pp.29~39 (1991)
- Kim W. J, "Radioactivecontamination of the coastal marine product of Korea", 13(2), pp.917~927 (1998)
- Yu K. N, "A study of radioactivities in six types of fish consumed in Hong Kong", 48(4), pp.515~519 (1997)
- National Institute of Radiological Science, "Radi- oactivity survey data in Japan", pp.48~112 (1997)
- Kim K. H, "Distrib- ution of Cs-137 and K-40 in Korean soils", 28(1), pp.33~40 (1995)
- Korean Institute Nuclear Safety, "Environmental radio- activity survey data in Korea", 34 (2002)