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External Exposure Due to Natural Radionuclides in Building Materials in Korean Dwellings
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 Title & Authors
External Exposure Due to Natural Radionuclides in Building Materials in Korean Dwellings
Cho, Yoon Hae; Kim, Chang Jong; Yun, Ju Yong; Cho, Dae-Hyung; Kim, Kwang Pyo;
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 Abstract
Naturally occurring radioactive materials (NORM) in building materials are main sources of external radiation exposure to the general public. The objective of this study was to assess external radiation dose in Korean dwellings due to NORM in concrete walls. Reference room model for dose assessment was made by analyzing room structure and housing scale of Korean dwellings. In addition, dose assessments were made for varying room sizes. Absorbed doses to air and effective dose rates were calculated using radiation transport code MCNPX. Assuming a reference room of , absorbed dose rates in air were 0.80, 0.97, 0.08 nGy per Bq for uranium series, thorium series, and , respectively. Effective dose rates were 0.57, 0.69, 0.058 nSv per Bq , respectively. Radiation dose resulting from concrete of ceiling and floor increased with room area while radiation dose from concrete of walls decreased with room area. Therefore, total radiation doses were almost the same for the varying room area from 5 to . Effective dose in Korean dwellings was calculated based on measurement data of NORM concentration in concrete and occupancy fraction of Korean population by location. Annual effective dose was 0.59 mSv assuming that indoor occupancy fraction was 0.89 and concentrations of uranium series, thorium series and were 26, 39, 596 Bq , respectively. Finally, annual effective dose in Korean dwellings can be calculated by the following equation: Effective dose=indoor occupancy fraction.
 Keywords
Building material;Naturally Occurring Radioactive Material;NORM;External exposure;
 Language
Korean
 Cited by
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생활주변방사선안전관리법 시행에 따른 항목별 선량 분석,정천수;오현지;이지은;조수민;박소현;

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한국산학기술학회논문지, 2014. vol.15. 6, pp.3658-3666 crossref(new window)
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수원시 소재의 한 대학 내 환경방사선량 측정 분석,이인자;정유진;김청경;김희솔;윤현민;박다정;고요한;

대한방사선기술학회지:방사선기술과학, 2014. vol.37. 3, pp.233-238
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Measuring and analyzing the radioactivity released from construction floor materials, Radiation Effects and Defects in Solids, 2017, 172, 5-6, 494  crossref(new windwow)
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