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KMID : 1151820180120030297
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Journal of the Korean Society of Radiology
2018 Volume.12 No. 3 p.297 ~ p.304
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Designation the Gray Region and Evaluating Concentration of Radionuclide in Kori-1 by Using Derived Concentration Guideline Level
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Jeon Yeo-Ryeong
Park Sang-June
Ahn Seok-Young
Kim Yong-Min
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Abstract
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U.S. nuclear power plant decommissioning guidelines(MARSSIM and MARLAP) are recommends to use DQOs when planning and conducting site surveys. The DQOs which is constructed in the site survey planning stage provide a way to make the best use of data. It helps we can get the important information and data to make decisions as well. From fifth to seventh steps of DQOs are the process of designing a site survey by using the collected data and information in the previous step to make reasonable and reliable decisions. The gray region that is set up during this process is defined as the range of concentrations where the consequences of type II decision errors are relatively small. The gray region can be set using DCGL and the average concentration of radionuclide in the sample collected at the survey unit. By setting up the gray region, site survey plan can be made most resource-efficient and the consequences on decision errors can be minimized. In this study, we set up the gray region by using the DCGL of Kori-1 which was derived from the previous research. In addition, we proposed a method to assess the concentration of radionuclide in samples for making decisions correctly.
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KEYWORD
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Nuclear Power Plant decommissioning, Site Release, DCGL, Gray Region, Data Quality Objectives (DQOs)
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