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KMID : 0364920140390010061
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Journal of Radiation Protection and Research
2014 Volume.39 No. 1 p.61 ~ p.64
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Practical Radiation Safety Control: (Ⅱ) Application of Numerical Guidance for the Discharges of Radioactive Gaseous and Liquid Effluents
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Kim Hyun-Gi
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Abstract
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Radioactive materials are in use and have many applications from the generation of electricity to the purposes ofresearch, industry and medicine such as diagnosis and therapy. In the course of their use some of radioactive substancesmay be discharged into the environment from facilities using the unsealed radioactive materials, which are main artificialsources occurring the public exposure. Discharges are in the form of gases, particles or liquids.This paper provides procedures to estimate the level of the public exposure based on the conservative assumptions andsimple calculations in the facility using unsealed liquid sources. They consist of two processes; (1) to calculate maximum concentrationof gaseous effluents discharged through the exhaust pipe and average concentration of liquid effluents dischargedthrough the drain of the storage tank, (2) to compare each of them to numerical guidances for the discharges of radioactivegaseous and liquid effluents mentioned in the related notification. For this purpose followings are assumed properly; dailyusage, form and dispersion rate of radionuclides, daily amount of radioactive liquid waste and exhaust and drainageequipment. The procedures are readily applicable to evaluate environmental effects by planned effluent discharges from facilitiesusing the unsealed radioactive materials. In addition they may be utilized to obtain practical requirements for radiationsafety control necessary for the reductions of the public exposure.
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KEYWORD
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Radiation safety control, Gaseous radioactive effluent, Liquid radioactive effluent Guidance for the discharges ofradioactive effluents Public exposure Radioactive concentration
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