Journal of Radiation Protection and Research

The Korean Association for Radiation Protection (대한방사선방어학회)
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Characteristic Evaluation of Exposed Dose with NORM added Consumer Product based on ICRP Reference Phantom

ICRP 기준팬텀 기반의 천연방사성핵종이 포함된 가공제품 사용으로 인한 피폭선량 특성 평가

  • Yoo, Do Hyeon (Department of Radiation Convergence Engineering, Yonsei University) ;
  • Lee, Hyun Cheol (Department of Radiation Convergence Engineering, Yonsei University) ;
  • Shin, Wook-Geun (Department of Radiation Convergence Engineering, Yonsei University) ;
  • Choi, Hyun Joon (Department of Radiation Convergence Engineering, Yonsei University) ;
  • Min, Chul Hee (Department of Radiation Convergence Engineering, Yonsei University)
  • 유도현 (연세대학교 방사선융합공학과) ;
  • 이현철 (연세대학교 방사선융합공학과) ;
  • 신욱근 (연세대학교 방사선융합공학과) ;
  • 최현준 (연세대학교 방사선융합공학과) ;
  • 민철희 (연세대학교 방사선융합공학과)
  • Received : 2014.08.17
  • Accepted : 2014.11.10
  • Published : 2014.12.30
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Abstract

In Korea, July 2012, the law as called 'Act on Safety Control of Radioactive Rays Around Living Environment' was implemented to control the consumer product containing Naturally Occurring Radioactive Material (NORM), but, there are no appropriate database and effective dose calculation system. The aim of this study was to develop evaluation technique of the exposure dose with the use of the consumer products containing NORM and to understand the characteristics of the exposed dose according to the radiation type and energy. For the evaluate of exposure dose, the ICRP reference phantom was simulated by the MCNPX code based on Monte Carlo method, and the minimum, medium, maximum energy of alphas, betas, gammas from the representative NORM of Uranium decay series were used as the source term in the simulation. The annual effective doses were calculated by the exposure scenario of the consumer product usage time and position. Short range of the alpha and beta rays are mostly delivered the dose to the skin. On the other hand, the gamma rays mostly delivered the similar dose to all of the organs. The results of the annual effective dose with $1Bq{\cdot}g^{-1}$ radioactive stone-bed and 10% radioactive concentration were employed with the usage time of 7 hours 50 minute per day, the maximum annual effective dose of alphas, betas, gammas were calculated 0.0222, 0.0836, $0.0101mSv{\cdot}y^{-1}$, respectively.

국내에서는 2012년 천연방사성핵종이 포함된 가공제품의 규제를 위해 생활주변방사선 안전관리법이 시행되었지만, 해당 가공제품 사용에 대한 인체 피폭선량을 평가할 수 있는 기초자료나 피폭선량 평가기술이 미비하다. 따라서 본 연구는 사용자 피폭선량을 정량적으로 평가하기 위한 방법을 제안하고, 방사선의 종류 및 에너지에 따른 피폭선량 특성의 확인을 목적으로 한다. 피폭선량 평가를 위해서 몬테칼로 방법을 사용한 Monte Carlo N-Particle Extended (MCNPX) 코드를 통해 International Commission on Radiological Protection (ICRP)의 기준팬텀이 전산모사 되었으며, 대표적 천연방사성핵종인 우라늄 계열에서 발생되는 알파선, 베타선, 감마선의 최소, 중간, 최대 에너지가 선원항으로 사용되었다. 연간 유효선량은 가공제품 사용시간 및 사용위치를 고려한 피폭시나리오를 기반으로 평가되었다. 짧은 비정의 알파선 및 베타선은 대부분의 선량을 피부에 전달한 반면, 감마선은 대부분의 장기에 유사한 선량을 전달하였다. 방사능이 $1Bq{\cdot}g^{-1}$ 인 돌침대에 포함된 천연방사성핵종의 함유율이 10%라고 가정하고 한국인 평균 수면시간인 7시간 50분간 돌침대를 사용하였을 때 최대 연간 유효선량은 알파선, 베타선, 감마선에 대해서 각각 0.0222, 0.0836, $0.0101mSv{\cdot}y^{-1}$로 평가되었다.

Keywords

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  2. An effective dose assessment technique with NORM added consumer products using skin-point source on computational human phantom vol.118, 2016, https://doi.org/10.1016/j.apradiso.2016.08.014
  3. 가공제품에 대한 생활주변방사선 실태조사 자료를 활용한 통계분석 vol.43, pp.2, 2014, https://doi.org/10.17946/jrst.2020.43.2.123