• Title/Summary/Keyword: Decommissioning

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The development of data analyzing system on decommissioning activities for Research Reactor (연구용 원자로 해체활동 데이터 분석 시스템 개발)

  • 정관성;김성균;서범경;이동규;박희성;이근우
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 2003.11a
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    • pp.354-357
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    • 2003

  • In decommissioning activities of nuclear facilities, the analyses and evaluations of data(man power, radiation exposure, waste outputs, equipments, etc ) is very important to accomplish effective decommissioning and dismantling. To handle the data from decommissioning activities of research reactor, we developed its database system. By using database system, we come to filter and analyze the date of decommissioning activities and we can evaluate the extraordinary decommissioning features of research reactor. It is likely to lay out and estimate the optimal plan of decommissioning. We expect that the database system of effective decommissioning activities build up the foundation of commercial reactor decommissioning.

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The Status of the KRR-l&2 Decommissioning Activities

  • Chung, Un-Soo;Park, Seung-Kook;Hong, Sang-Bum;Park, Jin-Ho
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2004.02a
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    • pp.96-105
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    • 2004

  • The decommissioning project of the KRR 1 & 2 was started in January 1997. The actual decommissioning activity was started at the RI production facility and was finished at the end of 2002. The dismantling works of all components including the reactor structure of the KRR-2 was started in January, 2003 and will be carried out for 2 years till the end of 2004. The project schedule is estimated to delay for 4∼5 months beyond the original plan because of delaying on the cutting of thermal column nose and removal of the graphite bricks, but it may be caught up during the removal working of concrete from biological shielding structure. This paper summarizes the general status of the KRR 1 & 2 and decommissioning activities.

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Conceptual Data Modeling on the KRR-1&2 Decommissioning Database

  • Park, Hee-Seoung;Park, Seung-Kook;Lee, Kune-Woo;Park, Jin-Ho
    • Nuclear Engineering and Technology
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    • v.34 no.6
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    • pp.610-618
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    • 2002

  • A study of the conceptual data modeling to realize the decommissioning database on the HRR-1&2 was carried out. In this study, the current state of the abroad decommissioning database was investigated to make a reference of the database. A scope of the construction of decommissioning database has been set up based on user requirements. Then, a theory of the database construction was established and a scheme on the decommissioning information was classified . The facility information, work information, radioactive waste information, and radiological information dealing with the decommissioning database were extracted through interviews with an expert group and also decided upon the system configuration of the decommissioning database. A code which is composed of 17 bit was produced considering the construction, scheme and information. The results of the conceptual data modeling and the classification scheme will be used as basic data to create a prototype design of the decommissioning database.

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A Suggestion of Contingency Guidelines According to ISDC Based on Overseas Contingency Data

  • Minhee Kim;Chang-Lak Kim;Sanghwa Shin
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.20 no.4
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    • pp.541-550
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    • 2022

  • When decommissioning nuclear power plant (NPP), the first task performed is cost estimation. This is an important task in terms of securing adequate decommissioning funds and managing the schedule. Therefore, many countries and institutions are conducting continuous research and also developing and using many programs for cost estimation. However, the cost estimated for decommissioning an NPP typically differs from the actual cost incurred in its decommissioning. This is caused by insufficient experience in decommissioning NPPs or lack of decommissioning cost data. This uncertainty in cost estimation can be in general compensated for by applying a contingency. However, reflecting an appropriate standard for the contingency is also difficult. Therefore, in this study, data analysis was conducted based on the contingency guideline suggested by each institution and the actual cost of decommissioning the NPP. Subsequently, TLG Service, Inc.'s process, which recently suggested specific decommissioning costs, was matched with ISDC (International Structure for Decommissioning Costing)'s work breakdown structure (WBS). Based on the matching result, the guideline for applying the contingency for ISDC's WBS Level 1 were presented. This study will be helpful in cost estimation by applying appropriate contingency guidelines in countries or institutions that have no experience in decommissioning NPPs.

  • https://doi.org/10.7733/jnfcwt.2022.031 인용 PDF KSCI