Derivation of preliminary DCGL for Kori Unit 1 using RESRAD-OFFSITE and comparison with RESRAD-ONSITE

• Published in: Annals of nuclear energy Vol. 151; p. 107954
• Main Authors: Park, Sang June, Byon, Jihyang, Lee, Min Cheol, Ahn, Seokyoung
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2021
• Subjects: DCGL; Decommissioning of Nuclear Power Plant; RESRAD; Site release; DCGL; Decommissioning of Nuclear Power Plant; RESRAD; Site release
• ISSN: 0306-4549; 1873-2100
• DOI: 10.1016/j.anucene.2020.107954

•Derivation of DCGL for the Kori Unit 1with different codes.•Researching the possibility of RESRAD-OFFSITE code application to the decommissioning.•Analysis of the results of the RESRAD-ONSITE and RESRAD-OFFSITE codes in the macroscopic point of view. The successful decommissioning of nuclear facilities requires the derivation of DCGL in accordance with national site release criteria. MARSSIM, a widely used decommissioning guideline, recommends that a probabilistic analysis should be performed to derive the DCGL, which can be done by using the RESRAD code. Among the RESRAD codes, the RESRAD-OFFSITE code is the latest software edition and can derive exposure dose of receptor located both on and off-site. In this study, the preliminary exposure dose and DCGL were obtained by using the RESRAD-OFFSITE code and compared with the results obtained by the RESRAD-ONSITE code. As a result of the analysis, it was found that some radionuclides exhibited similar exposure doses and DCGL values, whereas a deviation is observed in a few cases. In this study, the applicability of the RESRAD-OFFSITE code to the decommissioning was investigated, and the similarities and differences with the RESRAD-ONSITE code were analyzed.