Monitoring and Analytical Techniques for the Discharged Radiocarbon from Nuclear Facility

핵시설로부터 발생되는 방사성탄소 분석기술 및 감시

  • Chun, Sang-Ki (Korea Institute of Geology Mining and Materials, Earth & Environmental Division) ;
  • Kim, Nak-Bae (Korea Institute of Geology Mining and Materials, Earth & Environmental Division) ;
  • Kim, Kun-Han (Korea Institute of Geology Mining and Materials, Earth & Environmental Division) ;
  • Choi, Su-Young (Korea Institute of Geology Mining and Materials, Earth & Environmental Division) ;
  • Park, Chan-Jo (Korea Research Institute of Chemical Technology, Chemical Analysis Research Division) ;
  • Lee, Joung-Dae (Department of Chemical Engineering, Chung-Buk National University) ;
  • Shin, Jang-Sik (Department of Chemical Engineering, Chung-Buk National University)
  • Received : 2000.05.12
  • Published : 2000.12.25

Abstract

The object of this series of experiments was aimed for the systematic and long-term radioactivity monitoring through indirect search of C-14 concentration level changes in the natural conditions around the operating nuclear facilities. The result of environmental radioactivity level through tree-ring analysis is increased after operating nuclear facilities and such a level can be proved to relate power generation closely. The measured result of ${\delta}^{13}C$ through the treatment of cellulose can be showed the level -30‰. This figure is very different from one which is measured the -17‰ of air sample by passive air sampling and -8‰ of air sample by active air sampling. And these differences can be assumed as isotope fractionation by photosynthesis, but the problem is more study as needed.

본 일련의 실험은 가동중인 핵시설 주위의 자연환경내 방사성탄소 농도준위 변화의 간접적인 추적을 통하여 체계적이고 장기간에 걸친 환경감시 목적으로 수행되었다. 나무 나이테 분석을 이용한 방사성탄소 농도 측정 결과는 핵시설 가동 후 농도 준위가 증가한 것을 나타내었으며, 그 변화는 발전량과 밀접한 상관관계가 있음을 알 수 있었다. 한편 섬유소 처리를 통한 안정 동위원소비, ${\delta}^{13}C$을 측정한 결과는 -30‰을 나타내었으며, 이 값은 수동법 및 능동법으로 채취한 대기 시료중의 $^{13}C$값 -17‰ 및 -8‰과는 매우 다른 결과를 나타내었다. 이런 차이는 광합성에 의한 동위원소 분별효과라고 가정할 수 있으나, 이 문제는 심도있는 연구가 필요하다.

Keywords

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