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Importance Analysis of Radiological Exposure by Ground Deposition in Potential Accident Consequences for the Licensing Approval of a Nuclear Power Plant
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 Title & Authors
Importance Analysis of Radiological Exposure by Ground Deposition in Potential Accident Consequences for the Licensing Approval of a Nuclear Power Plant
Hwang, Won Tae; Jeong, Hae Sun; Jeong, Hyo Joon; Kim, Eun Han; Han, Moon Hee;
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 Abstract
In potential accident consequence assessments for the licensing approval of LWRs, the ground deposition of radionuclides released into the environment is not allowed into the models, as recommended in the U. S. Nuclear Regulatory Commission's regulatory guide. Meanwhile, it is allowed into the assessment models for the licensing approval of PHWRs with consideration of more detailed physical processes of radionuclides in the atmosphere. Under these backgrounds, importance of exposure dose by ground deposition was quantitatively evaluated and comprehensively discussed. For potential accidental releases of and , total exposure doses were more conservative in case of without consideration of ground deposition than in case of with its consideration. It was because of that the depletion of air concentration resulting from ground deposition is more influential in the contribution to total exposure doses than additional doses from contaminated ground. The exposure doses by the inhalation of contaminated air showed the contribution of more than 90% in total exposure doses, depending on atmospheric stability, release period of radionuclides and distance from a release point. The exposure doses from contaminated ground showed less than 10% at most in contribution of total exposure doses. The ratios of total exposure doses in case of with consideration of deposition to without its consideration for were distinct than those for . As the atmosphere is more stable, release duration of radionuclides is longer, distance from a release point is longer, it was more distinct.
 Keywords
Accident consequence assessment;Regulatory guide;Ground deposition;Air concentration;Exposure dose;
 Language
Korean
 Cited by
 References
1.
U. S. Nuclear Regulatory Commission (NRC). Atmospheric Dispersion Models for Potential Accident Consequence Assessments at Nuclear Power Plants. Regulatory Guide 1.145 Revision 1. 1979.

2.
U. S. Nuclear Regulatory Commission (NRC). Assumption Used for Evaluating the Potential Radiological Consequences of a Loss of Coolant Accident for Pressurized Water Reactors. Regulatory Guide 1.4 Revision 2. 1974.

3.
Canadian Standards Association. Guidelines for Calculating Radiation Doses to the Public from a Release of Airborne Radioactive Material under Hypothetical Accident Conditions in Nuclear Reactors. CAN/CSA-N288.2-M91. 1991.

4.
원자력안전위원회. 원자력시설 부지의 기상조건에 관한 조사.평가 기준. 원자력안전위원회고시 제2012-19호 (원자로29). 2012.

5.
Oak Ridge National Laboratory. CRRIS : Computerized Radiological Risk Investigation System for Assessing Doses and Health Risks from Atmospheric Releases of Radionuclides. ORNL/TM-8573. 1985.

6.
John E. Till and H. Robert Meyer. Radiological Assessment : A Textbook on Environment Dose Analysis. U. S. Nuclear Regulatory Commission. NUREG/CR-3332. ORNL-5968. 1983.

7.
Postma AK. Effect of Solubilities of Gases on Their Scavenging by Raindrops. U. S. Atomic Energy Commission Report Conf-700601. 1970.

8.
International Atomic Energy Agency (IAEA). International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources. Safety Series No. 115. 1996.