우물형 감마검출기를 이용한 대기 낙진 중 극저준위 137Cs 측정
Measurement of ultra-low-level of 137Cs in the fallout usinga well-type gamma spectrometry
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초록
The Korea Institute of Nuclear Safety (KINS) has been monitoring the radioactivity in the atmospheric fallout for a long time. Results show that 137Cs was always below the Minimum Detectable Activity (MDA) except when the Fukushima Nuclear Power Plant accident occurred. The Ionizing Radiation Center at Korea Research Institute of Standards and Science (KRISS) also collected the atmospheric fallouts at the end of each month and measured 137Cs using a well-type HPGe detector (GWL-300-15-s) since 2012. The annual 137Cs depositions ranged from 79 to 225 mBq/m2/year. 137Cs detected in the present atmospheric fallout is considered to be originated from the atmospheric nuclear bomb tests conducted by the USA and the former Soviet Union in the 1950s and early 1960s. The results of this study indicate that the well-type HPGe detector is more suitable for small size environmental samples (i.e., 0.5 - a few grams) and extreme low activity levels compared with the conventional detector (GEM90P4-95).
Abstract
The Korea Institute of Nuclear Safety (KINS) has been monitoring the radioactivity in the atmospheric fallout for a long time. Results show that 137Cs was always below the Minimum Detectable Activity (MDA) except when the Fukushima Nuclear Power Plant accident occurred. The Ionizing Radiation Center at Korea Research Institute of Standards and Science (KRISS) also collected the atmospheric fallouts at the end of each month and measured 137Cs using a well-type HPGe detector (GWL-300-15-s) since 2012. The annual 137Cs depositions ranged from 79 to 225 mBq/m2/year. 137Cs detected in the present atmospheric fallout is considered to be originated from the atmospheric nuclear bomb tests conducted by the USA and the former Soviet Union in the 1950s and early 1960s. The results of this study indicate that the well-type HPGe detector is more suitable for small size environmental samples (i.e., 0.5 - a few grams) and extreme low activity levels compared with the conventional detector (GEM90P4-95).
참고문헌 (20)
- "Laboratories National Henri Becquerel"[URL]
- United Nations Scientific Committee on the Effects of Atomic Radiation, "Sources and Effects of Ionizing Radiation" (2000)
- United Nations Scientific Committee on the Effects of Atomic Radiation, "Sources and Effects of Ionizing Radiation" (2013)
- S. H. Lee, "Distribution of 131I, 134Cs, 137Cs and 239,240Pu concentrations in Korean rainwater after the Fukushima nuclear power plant accident", Journal of Radioanalytical and Nuclear Chemistry, 296, pp.727~731 (2013)
- J. S. Oh, "Atmospheric input of 137Cs and 239,240Pu isotopes in Korea after the Fukushima nuclear power plant accident", Applied Radiation and Isotopes, 87, pp.53~56 (2014)
- S. H. Lee, "Evaluation of abundance of artificial radionuclides in food products in South Korea and sources", Journal of Environmental Radioactivity, 184-185, pp.45~52 (2018)
- D. Delacroix, "RADIONUCLIDE AND RADIATION PROTECTION DATA HANDBOOK", ~ (2002)
- S. V. Avery, "Caesium accumulation by microorganisms: uptake mechanisms, cation competition, compartmentalization and toxicity", Journal of Industrial Microbiology and Biotechnology, 14, pp.76~84 (1995)
- Radioactivity survey data in Japan, "National Institute of Radiological Sciences", ~ (2011)
- "Nuclear Regulatory Authority"[URL]
- 김창규, "대전지역 대기부 유진, 낙진 및 강수 중 7Be 및 137Cs 방사능 농도의 계절별 변화", 방사선방어학회지, 27, pp.11~19 (2002)
- 전국환경방사능조사, "한국원자력안전기술원", ~ (2018)
- 한정희, "동해 남서부 해역에서 210Pb를 이용한 퇴적속도 추정", 바다, 12(4), pp.273~279 (2007), 한국해양학회
- M. Aoyama, "Low level 137Cs measurements in deep seawater samples", Applied Radiation and Isotopes, 53, pp.159~162 (2000)
- Saı¨dou, "A comparison of alpha and gamma spectrometry for environmental natural radioactivity surveys", Applied Radiation and Isotopes, 66, pp.215~222 (2007)
- P. G. Appleby, "Efficiency corrections for variable sample height in well-type germanium gamma detectors", Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 225, pp.423~433 (2004)
- L. A. Currie, "Limits for Qualitative Detection and Quantitative Determination", Journal of Analytical Chemistry, 40, pp.586~593 (1968)
- G. H. Hong, "Radioactive impact in South Koreafrom the damaged nuclear reactors in Fukushima: evidence of long and short range transport", Journal of Radiological Protection, 32, pp.397~411 (2012)[DOI]
- C. K. Kim, "Radiological impact in Korea following the Fukushima nuclear accident", Journal of Environmental Radioactivity, 111, pp.70~82 (2012)
- K. H. Park, "134Cs and 137Cs radioactivity in soil and moss samples of Jeju Island after Fukushima nuclear reactor accident", Applied Radiation and Isotopes, 81, pp.379~382 (2013)