Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Evaluation of the Decontamination Efficiency of Radioactive Wastes Generated during the Production of 201Tl

201Tl의 생산과정에서 발생한 방사성 폐기물의 제염 효율 평가

  • Heo, Jae-Seung (Radiation Safety & Section, Korea Institute Radiological & Medical Sciences) ;
  • Kim, Sang-Rok (Radiation Safety & Section, Korea Institute Radiological & Medical Sciences) ;
  • Kim, Gi-Sub (Radiation Safety & Section, Korea Institute Radiological & Medical Sciences) ;
  • Ahn, Yun-jin (Radiation Safety & Section, Korea Institute Radiological & Medical Sciences) ;
  • Kim, Jung-Min (Department of Health & Safety Convergence Science, Korea University)
  • 허재승 (한국원자력의학원 방사선안전관리팀) ;
  • 김상록 (한국원자력의학원 방사선안전관리팀) ;
  • 김기섭 (한국원자력의학원 방사선안전관리팀) ;
  • 안윤진 (한국원자력의학원 방사선안전관리팀) ;
  • 김정민 (고려대학교 보건안전융합과학과)
  • Received : 2021.08.24
  • Accepted : 2021.10.04
  • Published : 2021.10.31
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Abstract

This study was conducted for the purpose of efficient radioactive waste disposal and management. Experiment was evaluated the decontamination efficiencies of the four types decontamination materials(Water, Alcohol, Decontamination Water, Decontamination Gel) with radioactive wastes generated during radio-pharmaceutical production process at Korea Institute Radiological and Medical Sciences(KIRAMS). The radioactive waste sample used in experiment is a lead plate of the fume hood that was disposed in April, 2019. In the experimental method, radioactive waste was measured before and after decontamination using a HPGe semiconductor detector and Gamma survey meter. The measured values before and after decontamination were evaluated for decontamination efficiency as a percentage. As a result, it was confirmed that a lot of specific activity and surface dose rate was removed from the radioactive wastes. In particular, when decontamination water was used, most of the radioactivity of radioactive wastes was removed. Considering these results, if decontamination water is used in decontamination of radioactive waste, decontamination efficiency equivalent to the disposition criteria can be expected with just one decontamination treatment. In addition, in the case of water and alcohol, only on decontamination was effective in approximately 75% and 95%. Otherwise, when decontamination gel was used, it was confirmed that the largest deviation occurred among all experimental results.

Keywords

Acknowledgement

This study was supported by a grant of the Korea Institute of Rradiological and Medical Sciences(KIRAMS), funded by Ministry of Science and ICT(MIST). Republic of Korea(No.50422-2021)

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