{"title":"A study on the optimization through the evaluation of radiation exposure by scenarios during steam generator dismantling","authors":"","doi":"10.1016/j.anucene.2024.110901","DOIUrl":null,"url":null,"abstract":"<div><p>Steam generator (SG) replacements in South Korea began with the Kori No. 1 unit in 1998 due to performance degradation. Currently, 20 steam generators have been replaced in total. While additional decommissioning of dozens of steam generator will be required soon due to life-expiration of several nuclear power plants, there has been no actual dismantling performance of steam generators yet, and the replaced decommissioned steam generators are currently stored in intermediate storage facilities. To minimize waste volume and facilitate site reuse, it’s necessary to proactively dismantle steam generators. These components are less radioactively contaminated and easier to dismantle compared to primary equipment like reactors. Additionally, securing related dismantling technology is essential for managing future replacements or equipment that has been stored. Establishing a process scenario about where and how the steam generator will be safely dismantled is important. It is necessary to analyze the advantages and disadvantages of each scenario to study the timing, location, and method of dismantling, and to develop an optimal process scenario through analysis of worker radiation exposure and dismantling costs. For this purpose, simulations were conducted on the radiation dose to workers according to the timing and method of dismantling, using 3D dismantling simulation software developed by Cyclife Digital Solutions, a subsidiary of French EDF, and the results were reviewed by mathematically modeling and analyzing the radiation doses exposed to workers over the years using an exponential decay model.</p></div>","PeriodicalId":8006,"journal":{"name":"Annals of Nuclear Energy","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of Nuclear Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0306454924005644","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Steam generator (SG) replacements in South Korea began with the Kori No. 1 unit in 1998 due to performance degradation. Currently, 20 steam generators have been replaced in total. While additional decommissioning of dozens of steam generator will be required soon due to life-expiration of several nuclear power plants, there has been no actual dismantling performance of steam generators yet, and the replaced decommissioned steam generators are currently stored in intermediate storage facilities. To minimize waste volume and facilitate site reuse, it’s necessary to proactively dismantle steam generators. These components are less radioactively contaminated and easier to dismantle compared to primary equipment like reactors. Additionally, securing related dismantling technology is essential for managing future replacements or equipment that has been stored. Establishing a process scenario about where and how the steam generator will be safely dismantled is important. It is necessary to analyze the advantages and disadvantages of each scenario to study the timing, location, and method of dismantling, and to develop an optimal process scenario through analysis of worker radiation exposure and dismantling costs. For this purpose, simulations were conducted on the radiation dose to workers according to the timing and method of dismantling, using 3D dismantling simulation software developed by Cyclife Digital Solutions, a subsidiary of French EDF, and the results were reviewed by mathematically modeling and analyzing the radiation doses exposed to workers over the years using an exponential decay model.
期刊介绍:
Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.