Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Study on Effective Shielding of Secondary Radiation Generated by High Energy Proton Accelerator

고 에너지 양성자 가속기에서 생성되는 2차 방사선의 효과적인 차폐에 관한 연구

  • Bae, Sang-Il (Dept. of Radiation Oncology, Dongnam Institute of Radiological & Medical Science) ;
  • Kim, Jung-Hoon (Dept. of Radiological Science, College of Health Sciences, Catholic University)
  • 배상일 (동남권원자력의학원 방사선종양학과) ;
  • 김정훈 (부산가톨릭대학교 방사선학과)
  • Received : 2020.08.21
  • Accepted : 2020.10.17
  • Published : 2020.10.31
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Abstract

High-energy proton accelerators continue to be increasingly used in medical, research and industrial settings. However, due to the high energy of protons, a large number of secondary radiation occurs. Among them, neutrons are accompanied by difficulties of shielding due to various energy distribution and permeability. So In this study, we propose a shielding method that can shield neutrons most efficiently by using multiple-shielding material used as a decelerating agent or absorbent as well as a single concrete shielding. The flux of secondary neutrons showed a greater decrease in the flux rate when heavy concrete was used than in the case of ordinary concrete, and the maximum flux reduction was observed at the front position when using multiple shields. Multiple shielding can increase shielding efficiency more than single shielding however, As the thickness of the multiple shielding materials increased, the decline in flux was saturated. The mixture material showed higher shielding results than the polyethylene when using boron carbonate.

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