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http://dx.doi.org/10.7742/jksr.2011.5.1.005

A Study on Minimum Detection Limit of Environmental Radioactivity in HPGe Detector  

Jang, Eun-Sung (Pusan National University Nuclear Physics and Radiation Technology Research Center)
Publication Information
Journal of the Korean Society of Radiology / v.5, no.1, 2011 , pp. 5-10 More about this Journal
Abstract
Based on basic concept of detection limit, sample measurement time & background measurement time was considered, and MDA values according to background measurement time and sample measurement time in land samples(river soil, surface soil, drinking water, underground water, surface water, pine leaf, mugwort) analysis among environmental samples were compared. Seeing the water sample analysis result, it was shown that most of the samples were not detected, and most of the samples in land specimen analysis showed to be below the detection limit of "Ministry of Education, Science and Technology Announcement Je-2008-28-ho", but $^{137}Cs$ which is one of artificial radioactive nuclide was detected in some samples. It can be traced back to 1950s and 1960s when nuclear tests were carried out in atmosphere and catastrophic Chernobyl atomic power station accident that caused fallouts in the sky, and this is common level of detection that can be observed worldwide. Seeing the result that the $^{134}Cs$(which is a isotope of $^{137}Cs$, and it has relatively short half life) was not detected in all samples, it can be considered it doesn't affect to the operation of atomic power station.
Keywords
Minimum Detectable Activity(MDA); soil sample; artificial radioactive nuclide; gamma nuclide analyzer;
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  • Reference
1 National Council on Radiation Protection and Measurement(NCRP), "A handbook of radioactivity measurements procedure", Bethesda, MD,NCRP Report No 58, 1985.
2 A. Brodsky, R.G. Gallaghar, Radiat. Protect. Mgt,. Vol 8, pp 64-78, 1991.
3 H. Friedmann,, Health Physics , Vol 77, pp 309-312, 1999.   DOI   ScienceOn
4 R. Seymour, F. Sergent, K.Knight and B Kyker. Radioactivity & Radiochemistry, Vol 3, pp 14-28, 1992.
5 A.C. Donald, S.D. Stephanie and L.S. Edwin, Health Physics. Vol 63, pp 338-340, 1992.   DOI   ScienceOn
6 J.S. Daniel and S.S.Paul, Health Physics, Vol 63, pp 360-361, 1992.   DOI   ScienceOn
7 D.Mayer and L. Dauer, Health Physics,Vol 65, pp 89-91, 1993.   DOI   ScienceOn
8 B.S. Pusternack and N.H. Harley, Nucl. Instr and Meth, Vol 91, pp 553-540, 1971
9 B.Altschuler and B. Pasternak, health Physics,Vol 9, pp 293-298, 1963.   DOI   ScienceOn
10 L.A. Currie, Anal, Chem, Vol 4,, pp 586-593, 1968.
11 J. H. Head , Nucl. Instr and Meth,Vol 98, pp 419-428, 1972.   DOI   ScienceOn
12 H.F show and L.A. Joseph, health Physics, Vol 92, pp 282-285, 1977.
13 J.D. Jack and L.W. Robert, Health Physics, Vol 32, pp 1-14, 1977.   DOI   ScienceOn
14 U.S. Environmental Protection Agency(EPA), "Upgrading environmental radiation data", Heath Physics Society Committee Repoty-1, Washington D.C. U.S.A., 1980.
15 J.A.Roderick, Health Physics, Vol 42, pp 230-231, 1982.
16 J.A.Roderick, Health Physics, Vol 43, pp 693-7031, 1982.   DOI   ScienceOn
17 한국원자력안전기술원, 원자력시설주변 환경조사 및 평가보고서, KINS/AR-730, 2008.
18 이재기 ," 환경방사능 감시 워크샆: 환경방사능 검출 한계에 대한 과찰", 한국원자력안전기술원, 1996.
19 F.M. Cox and C.F. Guenther, Health Physics, Vol 69, pp 121-129, 1995.   DOI   ScienceOn
20 이명호,신현상,홍광희,저영현,이창우, 대한방사선방어학회, Vol 24, pp 171-184, 1999.
21 한국원자력안전기술원, 전국환경방사능조사, Vol 31, pp KINS/AR-409, 2008.