• Nuclear Engineering and Technology
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• 제55권1호
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• pp.52-62
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• 2023

Various decontamination technologies have been developed for removing contaminated areas in industries. Although it is important to consider parameters such as safety, cost, and time when selecting the decontamination technology, till date their comparative study is missing. Furthermore, different decontamination technologies influence the decontamination effects in different ways. Therefore, this study compares different decontamination techniques for the steam generator using a multicriteria decision-making method. A steam generator is a large device comprising both low- and very low-level waste (LLW, VLLW) and reflects the difference in weights of the standards according to the classification of the waste. For LLW and VLLW decontaminations, chemical oxidizing reduction decontamination (CORD) and decontamination grit blasting were used as the preferred techniques, respectively, considering the purpose of decontamination differs based on the initial state of waste. An expert survey revealed that safety in LLW and waste minimization in VLLW exhibited high preference. This evaluation method can be applied not only to the comparison between each process, but also to the creation of process scenarios. Therefore, determining the decontamination approach using logical decision-making methods may improve the safety and economic feasibility of each step in the decommissioning process and ensure a public acceptance.

• 수산해양교육연구
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• 제29권3호
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• pp.920-931
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• 2017

Since the export of Korean-type APR 1400 in 2009 to the UAE, Korea has been achieved management performance, quality inspections, training, nuclear fuel exports for the nuclear power plant. Despite this apparent growth, there are lacking of the research on the marine transportation of radioactive waste. And the terrible accident at the Japan nuclear power plant in 2011 has caused another reconsideration such as emergency response training and plan, reinforcement of safety regulation. According to the Korean government aims to rebuild the appropriate regulation, training, education that is necessary in order to ensure the safety of marine transportation of radioactive waste. Therefore, this study analyzed the various problems identified by the team of experts for the radioactive waste and marine field, the investigation of relevant legal basis, the need for emergency response training for the person in charge of radioactive waste and suggested the simulation-based interactive curriculum during the process of safety verification related to the marine transport of mid- and low-level radioactive waste generated at the Yeon-ggwang nuclear power(Hanbit) plant in 2015.

• 동력기계공학회지
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• 제20권5호
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• pp.52-59
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• 2016

Environmental Qualification has been almost developed except those of Non-Material Sub-components for valves and pumps though the time has only passed about 10years since EQ test launch of Korea. However EQ test has been performed by a few of engineers under the conditions that experience of EQ test is insufficient and EQ system is not developed completely. In recent years, Strengthen Nuclear Safety Regulation is being done Strictly Nuclear safety components Verification Procedure for Non-Material Sub-components, but the reports contain only performance test results, not Enviro nmental test methods relating to real Aging Degradation. In this Study, there were developed to performance systematically research to acquire EQ technology for five specimens of the Non-Material Sub-components in the Nuclear Power Plant.

• 방사성폐기물학회지
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• 제17권2호
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• pp.263-278
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• 2019

항공기 충돌사고는 1970년대부터 원자력발전소의 인허가에 중요하게 고려되어 온 외부 사건의 하나였다. 9.11 테러 이후 세계 각국에서는 사고로 인한 항공기 충돌에 더하여 의도된 항공기 충돌에 대비한 안전성 평가를 수행해오고 있으며 일부 국가에서는 이를 법제화하여 인허가의 중요한 요건으로 다루고 있다. 항공기 충돌에 대한 안전성 평가는 여러가지 요인으로 인하여 쉽지 않은 작업이며 보다 신뢰성 있는 평가를 위한 연구개발이 세계 각국에서 진행 중이다. 본 논문에서는 각국의 항공기 충돌에 대비한 안전성 평가 요건의 법제화 현황을 사고로 인한 충돌과 의도된 충돌의 경우로 분리하여 정리하였다. 다양한 조건의 항공기 충돌에 대한 안전성 평가를 위하여 수행되어 온 연구 중 주요한 것들을 정리하였으며 특히 사용후핵연료 건식저장시설에 대한 내용을 위주로 다루었다.

• 한국압력기기공학회 논문집
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• 제18권1호
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• pp.1-10
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• 2022

Currently, there is no technical standard and regulation for seismic analysis of non-nuclear safety piping. Accordingly, ASME Sec.III ND, a standards applied to safety class 3 piping, is applied. However, the technical standard applied for other than seismic analysis is ASME B31, which leads to controversy. In this study, the feasibility of applying ASME B31E was confirmed by reviewing rulescomparing technical standards, and evaluating piping allowable stress margins. The evaluation revealed that applying ASME B31.1 as a technical standard is too conservative compared to ASME Sec.III ND. On the other hand, ASME B31E (issued at the request of the industry) clearly presents the technical standards for seismic analysis of ASME B31 piping, and shows a similar level of conservatism compared to ASME Sec.III ND. It is expected to reduce the controversy over technical standards for seismic analysis of non-nuclear safety piping by applying ASME B31E.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2002년도 춘계 학술발표회 논문집
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• pp.239-249
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• 2002

The Turbine Building of nuclear power plant is classified as non safety-related structure. During the operation, there may be possibility the original licensing basis would be changed, which makes non safety-related structure safety-related. Such a change in regulation requires utility to perform seismic qualification for the existing structure and their facilities. Thus it is meaningful to evaluate seismic margin of the existing non-qualified building structure. In addition, in this paper it is shown that a modification to the structure can enhance their seismic capacity.

• Journal of Radiation Protection and Research
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• 제23권3호
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• pp.197-210
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• 1998

IAEA는 1996년 방사성물질 안전 운송규정을 개정하였다. 이 규정은 방사성물질의 우송이나 포장에 관하여 우리나라를 비롯한 각국의 운송관련 규정의 기준이 되는 것으로 전반부에서는 IAEA가 1991년에 출간된 국제방사선방호위원회 (ICRP)의 신권고(Publication 60)를 받아들여 개정한 Safety Series No.115(전리방사선에 대한 방호 또는 방사선원의 안전을 위한 기본 안전기준)의 내용 등을 개정의 배경으로 하여 요약하였다. 후반부에서는 이들 개정된 기본 안전 기준들에 기초하여 IAEA의 새로운 운송규정에서 방사선방호의 목적으로 고찰된 요건들에 관한 주요 검토 개정사항을 방사선방어체계, 운송물등의 방사선준위, 방사선방호계획의 규정화, Q 시스템의 개념, 규제면제 등의 측면에서 Safety Series No.6 1985년판과 비교 검토하였다.

• Nuclear Engineering and Technology
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• 제53권1호
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• pp.314-321
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• 2021

As Indonesia is rich in natural resources, nuclear power remains a low priority among energy alternatives. However, Indonesia needs to introduce nuclear power to improve the atmospheric environment and to support sustainable economic growth. This study conducted a two-stage survey of logit-probit and analytic hierarchy process to analyze the perception of Indonesian energy policymakers regarding the introduction of nuclear power, the potential for change, and key decision factors. The analysis confirms that the perception of nuclear power is positive and that the willingness to expand nuclear power can improve if negative conditions, such as underdeveloped technology level, foreign aid and assistance, and safety issues are addressed. In addition, it is confirmed that the policy makers consider political/social and environmental factors to be more important for decision-making. The results of this study can give inplications and be used as a key reference for Indonesia's nuclear power policy

• 대한방사선기술학회지:방사선기술과학
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• 제41권6호
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• pp.573-580
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• 2018

The Nuclear Safety Commission amended the Nuclear Safety Act by strengthening the safety management system for the frequent workers to the level of radiation workers. And students entering radiation management zones for testing and practical purposes are subject to frequent workers. It is inevitable that this will incur additional costs. In this paper, the validity of the amendment to the Nuclear Safety Act was to be assessed in terms of radiation protection. Study subjects are from 2014 to 2016, among university students in Seong-nam Korea and comparisons for analyses were made taking into account variables that are differences in annual, practical types, on-class and clinical practice students exposure dose. The analysis showed that exposures between on-class and clinical practice received were less than the annual dose limit of 1 mSv for the public. Then, some alternatives that excluding from frequent workers during on-class practice or mitigating the frequent workers' safety regulation for only on-class frequent workers can be considered. Optimization is how rational is the reduction in exposure dose to the costs required. Therefore, the results are hardly considered for optimization. If the data accumulated, it could be considered that the revision of the act could be evaluated and improved.

• Journal of Radiation Protection and Research
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• 제37권4호
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• pp.219-225
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• 2012

방사선안전을 수행하는 방사선안전관리자를 대상으로 실제적인 방사선안전규제 수준을 파악하여 합리적인 안전규제 제도를 마련하는데 필요한 근거자료를 도출함으로써 방사선안전규제의 효율성과 편의성을 극대화할 수 있는 차별화된 규제에 도움이 되고자 하였다. IAEA의 RS-G-1.9 (2005), NRC의 NUREG Vol. 1~21 등과 국내 원자력안전법의 내용을 근거로 전체 약 10%에 해당되는 방사선이용기관의 방사선안전관리자를 대상으로 설문조사하였다. 피폭관리에 대한 요건($3.32{\pm}0.910$)이 가장 높은 인식수준을 나타냈고, 관련 서류의 기록, 비치, 보관에 대한 요건($2.84{\pm}0.826$)은 가장 낮은 인식수준을 나타냈다. 방사선원 현황 및 관리 요건, 시설 요건, 측정 및 오염관리 요건, 측정 장비 및 감시기 작동 요건, 교육 및 훈련 요건, 피폭관리 요건에서 산업기관이 의료기관보다 규제가 더 엄격해야 한다는 인식수준을 나타냈다. 방사선안전규제 수준이 산업기관과 의료기관에 통계적으로 유의한 차이가 있다는 것은 규제관련 그 원인이 존재하는 것이므로 실제적인 규제내용을 재평가해 볼 필요가 있음을 시사한다. 향후 연구에서는 국내 기관특성별로 규제요건을 개발하는 과정이 이루어질 필요가 있고, 기관특성을 고려하여 방사선안전규제를 수행한다면 편의성을 극대화한 안전규제를 달성할 수 있을 것이라고 사료된다.