Planning of Optimal Work Path for Minimizing Exposure Dose During Radiation Work in Radwaste Storage

방사성 폐기물 저장시설에서의 방사선 작업 중 피폭선량 최소화를 위한 최적 작업경로 계획

  • Park, Won-Man (College of Advanced Technology, Kyung Hee University) ;
  • Kim, Kyung-Soo (Impedance Imaging Research Center, Kyung Hee University) ;
  • Whang, Joo-Ho (Dept. of Nuclear Engineering, Kyung Hee University)
  • 박원만 (경희대학교 테크노 공학대학) ;
  • 김경수 (경희대학교 임피던스 영상 신기술 연구센터) ;
  • 황주호 (경희대학교 원자력 공학과)
  • Published : 2005.03.30

Abstract

Since the safety of nuclear power plant has been becoming a big social issue the exposure dose of radiation for workers has been one of the important factors concerning the safety problem. The existing calculation methods of radiation dose used in the planning of radiation work assume that dose rate does not depend on the location within a work space thus the variation of exposure dose by different work path is not considered. In this study, a modified numerical method was presented to estimate the exposure dose during radiation work in radwaste storage considering the effects of the distance between a worker and sources. And a new numerical algorithm was suggested to search the optimal work path minimizing the exposure dose in pre-defined work space with given radiation sources. Finally, a virtual work simulation program was developed to visualize the exposure dose of radiation doting radiation works in radwaste storage and provide the capability of simulation for work planning. As a numerical example, a test radiation work was simulated under given space and two radiation sources, and the suggested optimal work path was compared with three predefined work paths. The optimal work path obtained in the study could reduce the exposure dose for the given test work. Based on the results, tile developed numerical method and simulation program could be useful tools in the planning of radiation work.

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