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KMID : 0364920090340040195
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Journal of Radiation Protection and Research
2009 Volume.34 No. 4 p.195 ~ p.200
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An Investigation on the Technical Background for Carbon-14 Monitoring in Radioactive Effluents
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Kim Hee-Geun
Kong Tae-Young
Jeong Woo-Tae
Kim Seok-Tae
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Abstract
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In nuclear power plants (NPPs), various radioactive materials produced during the operation are discharged as radioactive effluents to the environment. The activity of carbon-14, one of the radioactive effluents, in the environment is already high level and its effect on radiation exposure to the public and the environment is insignificant; thus, NPPs did not perform the carbon-14 monitoring in effluents in the past. By the way, effluents of noble gas and particulate radioactive materials originated from nuclear fuels has been continuously reduced due to both the advancement of manufacturing and integrity technology for nuclear fuels and the improvement of operation methods of NPPs. Futhermore, the portion of dose assessment by tritium and carbon-14 to the public has been relatively increased because the lower limit of detection for low-energy beta sources, such as tritium and carbon-14, is low due to the advancement of radiation detection technology. In this paper, the technical background for carbon-14 monitoring in nuclear facilities was investigated using United States technical reports and papers. This paper also reviews whether carbon-14 monitoring is necessary or not based on the investigated documents.
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KEYWORD
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Radioactive Effluent, Discharge Control, Environmental Impact Assessment, Radiation Mornitoring, Carbon-14, Nuclear Facility
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