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KMID : 0364920140390010038
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Journal of Radiation Protection and Research
2014 Volume.39 No. 1 p.38 ~ p.44
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Radiological Dose Analysis to the Public Resulting from the Operation of Daedeok Nuclear Facilities
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Jeong Hae-Sun
Kim Eun-Han
Jeong Hyo-Joon
Han Moon-Hee
Park Mi-Sun
Hwang Won-Tae
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Abstract
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This paper describes the results of assessment of radiological dose resulting from operation of the Daedeok nuclearfacilities including the HANARO research reactor, which has been performed to assure whether or not to comply with theregulation standards of the radioactive effluents releases. Based on the meteorological data and the radiation source term,the maximum individual doses were evaluated from 2010 to 2012. The atmospheric dispersion and the deposition factors ofgaseous effluents were calculated using the XOQDOQ computer code. ENDOS-G and ENDOS-L code systems were also usedfor maximum individual dose calculation from gaseous and liquid effluents, respectively. The results were compared with theregulation standards for the radioactive effluents presented by the Nuclear Safety and Security Commission (NSSC). Theeffective doses and the thyroid doses of the maximum individual were calculated at the maximum exposed point in theDaedeok site, and contributions of exposure pathways to the radiological doses resulting from gaseous and liquid radioactiveeffluents were evaluated at each facility of the Daedeok site. As a result, the maximum exposed age was analysed to bethe child group, and the operation of HANARO research reactor had a major effect more than 90% on the individual doses.The main exposure pathways for gaseous radioactive effluent were from ingestion and inhalation. The effective doses andthe thyroid doses were considerably influenced by tritium and iodine, respectively. The gaseous radioactive effluentscontributed more than 90% on the total doses, whereas the contributions of the liquid radioactive effluents were relativelylow. Consequently, the maximum individual dose due to radioactive effluents from the nuclear facilities within the Daedeoksite were less than 3% of the regulation standard over 3 years; therefore, it can be concluded that radioactive effluents fromthe nuclear facilities were well managed, with the radiation-induced health detriment for residents around the site beingnegligible.
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KEYWORD
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Daedeok nuclear facility, Maximum individual dose, Gaseous radioactive effluents, Liquid radioactive
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