Shielding performance evaluation according to grid particle dispersion method for manufacturing medical radiation thin film shielding sheet

서지정보

· 발행기관 : 한국산학기술학회
· 수록지 정보 : 한국산학기술학회논문지 / 23권 / 10호 / 525 ~ 532페이지
· 저자명 : 김선칠

초록

Shielding clothing used as medical radiation shielding requires weight and flexibility so that it does not restrict the activities of the medical staff or patients. Lead is mainly used as the existing shielding material, and flexibility is secured by mixing lead powder and rubber powder to make a rubber sheet. However, there are problems due to the risk and weight of lead. Although some eco-friendly shielding materials such as tungsten, barium sulfate, and bismuth oxide have solved the lightweight problem, it has not reached a level of medical personnel satisfaction. The manufacturing of lightweight shielding sheets focuses on dispersing the shielding material. The uniform dispersion of particles leads to density enhancement, which is an important factor in attenuating the radiation energy intensity by increasing the probability of interaction between particles and radiation. This study evaluates the difference in particle distribution and radiation shielding performance of the grid coating method and the conventional unidirectional coating method in the thin film sheet manufacturing process. The 0.3 mm laminated sheet produced by applying the grid method showed a lead equivalent of 0.033 mmPb, and the sheet of the conventional method showed 0.023 mmPb, indicating that the effect of the grid particle dispersion method was better. Therefore, the grid method is a potentially effective process technology for the future manufacturing of thin film sheets such as shielding gloves and hats.

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