New methodologies to derive discharge limits considering operational flexibility of radioactive effluents from Korean nuclear power plants based on historical discharge data
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The new methodologies to derive discharge limits considering operational flexibility according to internationalsafety standards were developed to help reduce the environmental releases of radioactiveeffluents from nuclear power plants (NPPs). To overcome the limitations of the two existing methods toset up discharge limits assuming a specific statistical distribution of the effluent discharge, two modifiedequations were newly proposed to directly derive a particular discharge limits corresponding to thetarget ‘compliance probability’ based on the actual annual discharge data for a specific NPP and radionuclidegroups. By applying these to the actual yearly discharge data of 14 Korean NPPs for 7 radionuclidegroups for the past 20 years, the applicability of two new methodologies to actual cases was demonstrated. The ‘characteristic value’ with approximately a 90% compliance probability for each Korean NPPand radionuclide group was proposed based on the results. The new approaches for setting up thedischarge limits and the characteristic values developed in this study are expected to be effectivelyutilized to foster operator's efforts to progressively reduce the environmental releases of radioactiveeffluents of NPPs relative to the previous discharge data considering operational flexibilities.
Abstract
The new methodologies to derive discharge limits considering operational flexibility according to internationalsafety standards were developed to help reduce the environmental releases of radioactiveeffluents from nuclear power plants (NPPs). To overcome the limitations of the two existing methods toset up discharge limits assuming a specific statistical distribution of the effluent discharge, two modifiedequations were newly proposed to directly derive a particular discharge limits corresponding to thetarget ‘compliance probability’ based on the actual annual discharge data for a specific NPP and radionuclidegroups. By applying these to the actual yearly discharge data of 14 Korean NPPs for 7 radionuclidegroups for the past 20 years, the applicability of two new methodologies to actual cases was demonstrated. The ‘characteristic value’ with approximately a 90% compliance probability for each Korean NPPand radionuclide group was proposed based on the results. The new approaches for setting up thedischarge limits and the characteristic values developed in this study are expected to be effectivelyutilized to foster operator's efforts to progressively reduce the environmental releases of radioactiveeffluents of NPPs relative to the previous discharge data considering operational flexibilities.
참고문헌 (46)
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