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  • 한국과학기술정보연구원(KISTI) 서울분원 대회의실(별관 3층)
  • 2024년 07월 03일(수) 13:30
 

  • P-ISSN1225-0163
  • E-ISSN2288-8985
  • SCOPUS, ESCI, KCI

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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

남한강수계 하천 퇴적물 시료 중 137Cs 분포

The distribution of 137Cs activities in sediment samples of South-Han River basin

분석과학 / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2016, v.29 no.6, pp.293-299
https://doi.org/10.5806/AST.2016.29.6.293
김지유 (국립환경과학원 물환경평가연구과)
강태우 (국립환경과학원 영산강물환경연구소)
홍정기 (국립환경과학원 물환경평가연구과)
안미정 (국립환경과학원 물환경평가연구과)
장채원 (국립환경과학원 물환경평가연구과)
김경현 (국립환경과학원 물환경평가연구과)
한영운 (국립환경과학원 영산강물환경연구소)
강태구 (국립환경과학원)
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초록

본 연구는 남한강 수계 하천 퇴적물 중 137Cs의 방사능 농도 분포 실태를 조사하고, 국외 연구사례와 비교하여 국내 하천퇴적물 중 137Cs의 농도수준을 평가하였다. 감마선분광분석기를 이용하여 퇴적물중 137Cs의 방사능 농도를 분석한 결과, 농도범위는 <MDA~3.80 ± 0.14 Bq/kg·dry로 국내 토양 중 137Cs 농도와 비슷한 수준을 보였다. 국외 연구사례를 조사한 결과, 원전사고나 방사성물질 유출 등에 의한 오염원이 존재할 경우 137Cs의 농도범위는 3.7~15,396 Bq/kg·dry로 국가별, 오염원 발생시기, 조사시점 등에 따라다양한 농도 분포를 보였다. 또한, 오염원이 없는 국외 하천·호소 퇴적물 중 137Cs의 농도는 대부분 10 Bq/ kg·dry 미만으로 본 연구결과와 유사한 수준으로 나타났다. 본 연구결과는 우리나라 하천퇴적물 중 137Cs의배경농도를 제공하고, 하천의 137Cs 오염여부를 판단하는 기초자료로 활용할 수 있을 것으로 사료된다.

keywords
137Cs, Artificial radionuclides, River sediment, Gamma-ray spectrometry

Abstract

137Cs was investigated in river bottom sediments located in South-Han River basin and it was compared with international case studies to estimate the concentration level of 137Cs in river sediment of Korea. The obtained values of 137Cs which was analyzed by gamma-ray spectrometry were in the range of <MDA~ 3.80 ± 0.14 Bq/kg·dry and similar to the 137Cs activities in soil of Korea. According to international case studies, 137Cs activities were between 3.7 to 15,396 Bq/kg·dry, when pollutants such as nuclear power plant accidents and radiation leaks were present near the rivers. The 137Cs activities showed a variety of distribution depending on the country, when pollution occurs and survey time. Also, 137Cs activities of river sediments without pollution sources were mostly less than 10 Bq/kg·dry in other countries. It was comparable with the obtained 137Cs activities in this study. The obtained values provide useful information on the background concentration of 137Cs in river sediment and will be able to use a basis for determining contamination of 137Cs in the river.

keywords
<TEX>$^{137}Cs$</TEX>, Artificial radionuclides, River sediment, Gamma-ray spectrometry


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