• Title, Summary, Keyword: 원자로 해체

Search Result 67, Processing Time 0.041 seconds

Development of the draft guidelines of the decommissioning plan for a nuclear power plant in Korea (국내 원자로시설 해체계획서 세부 작성지침(안) 개발)

  • Lee, Jungmin;Moon, Joohyun
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.11 no.3
    • /
    • pp.213-227
    • /
    • 2013
  • It is essential to prepare the decommissioning plan for a nuclear power plant (NPP) for the safe decommissioning of the NPP, minimization of the generation of decommissioning wastes, and protection of human beings and environment. Although Kori unit 1 and Wolsong unit 1 will be destined to their decommissioning in Korea in the near future. there is no provisons about preparing the decommissioning plan. In this paper, therefore, the draft guidelines of the decommissioning plan for a NPP were developed by considering the domestic situation, based on the comparative analyses of the regulatory guidelines of the decommissioning plan in U.S., U.K. and France. The draft guidelines are expected to play an important role to modify the domestic laws and regulations on the decommissioning of the NPP, and to give a license holder in charge of decommissioning the detailed instructions for preparing it in advance.

원자로의 디커미셔닝과 기술개발 - 강구조물의 해체기술 -

  • 한국원자력산업회의
    • Nuclear industry
    • /
    • v.5 no.7
    • /
    • pp.30-35
    • /
    • 1985
  • 원자력시설의 폐지조치에 따른 원자로 강구조물의 해체 또는 시설에서 발생하는 방사성고체폐기물의 감용처리 등 해체기술에 관한 연구개발의 필요성이 높아지고 있다. 이들 강구조물의 해체기술은 원자력시설 특유의 조건을 고려하여, 방사선방호의 관점에서 수중절단 또는 방사화된 두꺼운 재료의 원격절단을 고려한 공법을 취하여야 한다. 다음은 경수로형 원자력발전소의 원자로압력용기 및 로내구조물을 대상으로한 강구조물의 해체기술이다.

  • PDF

Development of the Decommissioning Database System to Manage and Assess Data front Decommissioning Activities of Korea Research Reactor 1 & 2 (연구로 1, 2호기 해체활동에 대한 자료 관리 및 평가를 위한 데이터베이스 시스템 개발)

  • 정관성;이동규;박희성;이근우
    • Journal of Energy Engineering
    • /
    • v.13 no.3
    • /
    • pp.191-198
    • /
    • 2004
  • Korea Research Reactor (KRR) 1 & 2 has shut down and through preparatory activities, its decommissioning activities are underway. As its decommissioning activities have been done over several years, its relevant data have been spreaded with various type and media all over the discrete place and inadvertently managed. As s result, managing and assessing data of KRR 1 & 2 has been difficult and complex and its data cannot be evaluated. By developing the decommissioning database system of KRR 1 & 2, the data of decommissioning activities fan be correctly evaluated, being systematically managed and objectively assessed. Finally, the decommissioning project of KRR 1 & 2 have come to more effectively accomplished.

Calculating the Unit Cost Factors for Decommissioning Cost Estimation of the Nuclear Research Reactor (연구용원자로 해체비용 산정을 위한 단위비용인자 산출)

  • Jeong, Kwan-Seong;Lee, Dong-Gyu;Jung, Chong-Hun;Lee, Kune-Woo
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.4 no.4
    • /
    • pp.385-391
    • /
    • 2006
  • The estimated decommissioning cost of nuclear research reactor is calculated by applying a unit cost factor-based engineering cost calculation method on which classification of decommissioning works fitted with the features and specifications of decommissioning objects and establishment of composition factors are based. Decommissioning cost of nuclear research reactor is composed of labor cost, equipment and materials cost. Labor cost of decommissioning costs in decommissioning works are calculated on the basis of working time consumed in decommissioning objects. In this paper, the unit cost factors and work difficulty factors which are needed to calculate the labor cost in estimating decommissioning cost of nuclear research reactor are derived and figured out.

  • PDF

Assessment of the Radiological Inventory for the Reactor at Kori NPP Using In-Situ Measurement Technology (In-Situ 측정법을 이용한 고리 원자로 방사선원항 평가)

  • Jeong, Hyun Chul;Jeong, Sung Yeop
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.12 no.2
    • /
    • pp.171-178
    • /
    • 2014
  • After the expiration of operating license of a plant, all infrastructures within the plant must be safely dismantled to the point that it no longer requires measures for radiation protection. Despite the fact that Kori 1 and Wolsong 1 are close to the expiration of their operating license, sufficient technologies for radiological characterization, decontamination and dismantling is still under development. The purpose of this study is to develop one of methods for radiological inventory assessment on measuring object by using direct measure of large component with In-Situ measurement technique. Radiological inventory was assessed by analyzing nuclide using portable gamma spectroscopy without dismantling reactor head, and the result of direct measurement was supplemented by performing indirect measurement. Radiochemical analysis were performed on surface contamination samples as well. During the study, radiological inventory of reactor vessel calculated expanding the result. Based on the result and the radioactivity variation of each radionuclides time frame for decommissioning can be decided. Thus, it is expected that during the decommissioning of plants, the result of this study will contribute to the reduction of radiation exposure to workers.

Development of the Database System for Managing Decommissioning Information from Research Reactor (연구로 해체정보 관리를 위한 데이터베이스 시스템 개발)

  • 정관성;이동규;박희성;이근우;오원진
    • Proceedings of the Korean Radioactive Waste Society Conference
    • /
    • /
    • pp.58-71
    • /
    • 2004
  • Korea Research Reactor (KRR) 1&2 has shut down and through preparatory activities, its decommissioning activities are underway. As its decommissioning activities have been done over several years, its relevant data have been spreaded with various type and media all over the discrete place and inadvertently managed, As a result, managing and assessing data of KRR 1&2 has been difficult and complex and its data cannot be evaluated. By developing the decommissioning database system of KRR 1&2 the data of decommissioning activities can be correctly evaluated, being systematically managed and objectively assessed. Finally, the decommissioning project of KRR 1&2 have come to more effectively accomplished. As the data of decommissioning activities can be at last systematically analyzed and objectively assessed, the decommissioning project of KRR 1&2 would be more effectively accomplished.

  • PDF

Design of a Interface for Digital Mock-up (디지털 목업 인터페이스 설계)

  • Park, Hee-Seoung;Kim, Sung-Kyun;Lee, Kyne-Woo;Oh, Won-Jin;Jin, Seong-Il
    • Proceedings of the Korea Information Processing Society Conference
    • /
    • /
    • pp.1403-1406
    • /
    • 2005
  • 원자력 시설 및 연구용 원자로 해체 시 해체 일정과 해체 폐기물량 그리고 해체 비용을 분석하기 위한 평가식이 수립되었다. 연구로 2 호기 Thermal column 자료를 참고하여 평가식을 실험하였다. 해체 공정 모사 결과를 애니메이션으로 보여주는 가시화 모듈과 해체 일정과 해체 폐기물량, 작업자 피폭선량 및 해체 비용 등을 평가식으로 계산 한 후 그 결과를 그래픽으로 보여주는 시뮬레이션 모듈로 구성된 해체 디지털 목업 시스템의 그래픽 사용자 인터페이스가 설계되었다. 해체 단위 작업별 평가식은 원자력과 관련한 시설 해체 시 해체 일정 및 해체 비용 분석 및 예측에 중요한 기초자료로 사용 될 것이다. 또한 그래픽 사용자 인터페이스는 방사능의 오염으로 인해 작업자가 접근하기 힘든 환경에서의 해체 활동을 사전에 경험함으로써 피폭으로부터 작업자의 안전성을 향상시킬 수 있는 유용한 도구로 활용될 수 있다.

  • PDF

Evaluation on Radioactive Waste Disposal Amount of Kori Unit 1 Reactor Vessel Considering Cutting and Packaging Methods (고리 1호기 원자로 압력용기 절단과 포장 방법에 따른 처분 물량 산정)

  • Choi, Yujeong;Lee, Seong-Cheol;Kim, Chang-Lak
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.14 no.2
    • /
    • pp.123-134
    • /
    • 2016
  • Decommissioning of nuclear power plants has become a big issue in South Korea as some of the nuclear power plants in operation including Kori unit 1 and Wolsung unit 1 are getting old. Recently, Wolsung unit 1 received permission to continue operation while Kori unit 1 will shut down permanently in June 2017. With the consideration of segmentation method and disposal containers, this paper evaluated final disposal amount of radioactive waste generated from decommissioning of the reactor pressure vessel in Kori unit 1 which will be decommissioned as the first in South Korea. The evaluation results indicated that the final disposal amount from the top and bottom heads of the reactor pressure vessel with hemisphere shape decreased as they were cut in smaller more effectively than the cylindrical part of the reactor pressure vessel. It was also investigated that 200 L and 320 L radioactive waste disposal containers used in Kyung-Ju disposal facility had low payload efficiency because of loading weight limitation.

A Study on Segmentation Process of the K1 Reactor Vessel and Internals (K1 원자로 및 내부구조물 절단해체 공정에 대한 연구)

  • Hwang, Young Hwan;Hwang, Seokju;Hong, Sunghoon;Park, Kwang Soo;Kim, Nam-Kyun;Jung, Deok Woon;Kim, Cheon-Woo
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.17 no.4
    • /
    • pp.437-445
    • /
    • 2019
  • After the permanent shutdown of K1 in 2017, decommissioning processes have attracted great attention. According to the current decommissioning roadmap, the dismantling of the activated components of K1 may start in 2026, following the removal of its spent fuel. Since the reactor vessel (RV) and reactor vessel internal (RVI) of K1 contain massive components and are relatively highly activated, their decommissioning process should be conducted carefully in terms of radiological and industrial safety. For achieving maximum efficiency of nuclear waste management processes for K1, we present activation analysis of the segmentation process and waste classification of the RV and RVI components of K1. For RVI, the active fuel regions and some parts of the upper and lower active regions are classified as intermediate-level waste (ILW), while other components are classified as low-level waste (LLW). Due to the RVI's complex structure and high activation, we suggest various underwater segmentation techniques which are expected to reduce radiation exposure and generate approximately nine ILW and nineteen very low level waste (VLLW)/LLW packages. For RV, the active fuel region and other components are classified as LLW, VLLW, and clearance waste (CW). In this case, we suggest in-situ remote segmentation in air, which is expected to generate approximately forty-two VLLW/LLW packages.