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한국안전학회(구 한국산업안전학회)> 한국안전학회지(구 산업안전학회지)> 후쿠시마 원전사고 종적사례연구를 통한 원전에너지 안전성 고찰

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후쿠시마 원전사고 종적사례연구를 통한 원전에너지 안전성 고찰

Nuclear Safety: A Longitudinal Case Study from the Fukushima Nuclear Disaster

이준혁 ( Joon Hyuk Lee ) , 진영민 ( Young Min Jin ) , 조영혁 ( Young Hyuk Jo ) , 이순홍 ( Soon Hong Lee )
  • : 한국안전학회(구 한국산업안전학회)
  • : 한국안전학회지(구 산업안전학회지) 31권1호
  • : 연속간행물
  • : 2016년 02월
  • : 139-147(9pages)

DOI


목차

1. Introduction
2. The History of Nuclear Energy Policy in Japan
3. The Quest for Energy Security
4. Reignited Concerns of Nuclear Energy
5. In Comparision to Alternative Energy
6. In Comparision to South Korea
7. Questionnaire Study on Two Countries
8. C

키워드 보기


초록 보기


						
Nuclear energy is considerably cheap and clean compared to other fossil fuels. Yet, there are rising safety concerns of nuclear power plants including the possibility of radiation releasing nuclear accidents. In light of the Fukushima nuclear crisis in 2011, Japan has been re-evaluating their existing energy policies and increasing the share of alternative energy. This paper first tracks the major historical changes of energy policy in Japan by time period. Next, energy security, reignited concerns and alternative energy are covered to examine Japan``s energy security situation and its transition after the Fukushima disaster. Lastly, a short survey based on thematic analysis was conducted in South Korea and Japan to understand the public awareness of nuclear. This paper postulates that the case of Fukushima will contribute to establish and operate a safe-future nuclear program in South Korea, given that the country is not only geographically neighbouring Japan but also the world``s fourth largest producer of nuclear energy.

UCI(KEPA)

I410-ECN-0102-2016-530-000700247

간행물정보

  • : 공학분야  > 기타(공학)
  • : KCI등재
  • :
  • : 격월
  • : 1738-3803
  • : 2383-9953
  • : 학술지
  • : 연속간행물
  • : 1986-2019
  • : 2815


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1위험기계, 기구의 위험성 평가 및 안전인증 또는 자율안전확인의 적정성

저자 : 최기흥 ( Gi Heung Choi ) , 노병국 ( Byoung Gook Loh )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 1-6 (6 pages)

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Severity and frequency of industrial accidents are typically used to assess the “absolute” risk associated with the industrial machines and devices (“items”) which are subject to safety certification or self-declaration of conformity. However, the “relative” risk associated with a particular item can further be assessed based on unit severity and unit frequency where the total number of item in use is taken into account. This study first attempts to estimate the total number of each item in use which was recently selected for safety certification or self-declaration of conformity. The appropriateness of such selection is recapitulated based on the relative risk involved. Analysis results indicate that depending on items, the relative risk is differentiated from the absolute risk. Recent selection of items for safety certification or self-declaration of conformity is then revisited for its validity. The relative risk based on unit severity and unit frequency of industrial accidents, together with the absolute risk, may be used to further categorize items for safety certification or self-declaration of conformity in the future.

2산업용 위험기계,기구 의무 및 임의 안전인증의 효과 및 균형

저자 : 최기흥 ( Gi Heung Choi )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 7-12 (6 pages)

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This study first focuses on the quantitative evaluation of both compulsory and voluntary safety certification of industrial machines and devices. Based on the results of statistical analysis, effectiveness of those safety certifications were confirmed. In order to reduce both the frequency and the strength of industrial accidents associated with industrial machines and devices, major target of safety regulations needs to be shifted from users to manufacturers. Adjustment of industrial machines and devices which are subject to compulsory safety certification and implementation of risk assessment are further suggested. As for the voluntary certification, reestablishment of the concept of voluntary safety certification and balance between compulsory and voluntary certifications is discussed. Voluntary safety certification is further suggested as a mean to manage safety of industrial machines and devices which are not subject to any safety regulations.

3RCF 시험을 통한 KTX 윤축베어링의 분해 정비 주기 평가

저자 : 심대섭 ( Dae Sop Sim ) , 허태현 ( Tae Hyeon Heo ) , 박영일 ( Young Il Park ) , 김홍석 ( Hong Seok Kim ) , 신기훈 ( Ki Hoon Shin ) , 정성균 ( Seong Kyun Cheong )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 13-18 (6 pages)

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KTX wheelset bearings have thus far been maintained in accordance with the maintenance system of French national railway company, SNCF. The overhaul cycle time (OCT) of KTX wheelset bearings is now 1.4 million km in mileage. This value, however, has not been validated in Korea that has much different railway environments with France. In fact, it is impossible to validate OCT of wheelset bearings directly because they are disassembled and cleaned only when some faults are detected. In this paper, the accuracy of the current OCT value was evaluated indirectly by investigating the effect of grease lubricants on the bearing life. Five grease samples (one new and four aged greases) were used in this study. Four aged greases of different conditions were obtained from four wheelset bearings whose mileages were about 0.3, 1.2, 1.3, and 1.8 million km, respectively. Each grease sample was then injected into the RCF (Rolling Contact Fatigue) tester and fatigue lifetime was experimentally estimated. In addition, the wt% of Fe in each grease sample was analysed. The experiment results reveal that the bearing lifetime is inversely proportional to the mileage of grease sample while the wt% of Fe increases with the mileage of grease sample. Based on the experimental results, it can be concluded that the current OCT value is appropriate for the first overhaul of wheelset bearings. However, further validation is required to determine the second and third OCT values.

4응력완화를 이용한 고무시편의 가속수명시험 연구

저자 : 이수영 ( Su Yeong Lee ) , 유지혜 ( Ji Hye You ) , 이용성 ( Yong Sung Lee ) , 김홍석 ( Hong Seok Kim ) , 정성균 ( Seong Kyun Cheong ) , 신기훈 ( Ki Hoon Shin )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 19-24 (6 pages)

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Rubber parts are widely used in many applications such as dampers, shock absorbers, and seals used in railway and automotive industries. Much research has thus far been conducted on property estimation and life prediction of rubber parts. To predict the service life of rubber parts at room temperature, most prior work adopts the well-known Arrhenius model that needs the accelerated life test in high-temperature conditions. However, they may not reflect the actual conditions of use that rubber parts are usually used  under a specific strain condition during long period of time. In this context, we propose a method for the life prediction of rubber parts inactual conditions of use. The proposed method is based on the accelerated life test using stress relaxation during which three relatively high elongation percentages (100%, 200%, and 300%) are applied to the rubber specimens. Rubber specimens were prepared in accordance with KS M 6518 standard and three stress relaxation testers were fabricated for actual experiments. Finally, a inverse power model for life prediction was derived from experimental results. The predicted life was compared with the actual test life for validation.

5화재 열발생률 입력 불확실도에 대한 FDS 결과의 민감도 분석

저자 : 조재호 ( Jae Ho Cho ) , 황철홍 ( Cheol Hong Hwang ) , 김주성 ( Joo Sung Kim ) , 이상규 ( Sang Kyu Lee )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 25-32 (8 pages)

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A sensitivity analysis of FDS(Fire Dynamics Simulator) results for the input uncertainty of heat release rate (Q) which might be the most influencing parameter to fire behaviors was performed. The calculated results were compared with experimental data obtained by the OECD/NEA PRISME project. The sensitivity of FDS results with the change in Q was also compared with the empirical correlations suggested in previous literature. As a result, the change in the specified Q led to the different dependence of major quantities such as temperature and species concentrations for the over- and under-ventilated fire conditions, respectively. It was also found that the sensitivity of major quantities to uncertain value of Q showed the significant difference in results obtained using the previous empirical correlations.

6유압 장치를 이용한 철도 연결기용 고용량 충격완충기의 성능시험

저자 : 김남욱 ( Nam Wook Kim ) , 박영일 ( Yeong Il Park )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 33-40 (8 pages)

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Coupling systems under train's collision should take the impact by absorbing the impact energy caused from the collision, so the systems are very important parts for the safety of the trains. However, it is not easy to evaluate the performance of the system because  it requires a huge testing facility, which is able to control the impact and to handle many safety issues. In this paper, test results areprovided, which are obtained from collision tests of a single train having a coupling system in the front, and the results are analyzed in order to understand the characteristics and the dynamic behaviors of energy absorbing materials in the coupling system, such as a hydraulic buffer, and two rubber buffers. The results show that the force of each component could be empirically described by the compression displacement and velocity. The analyzed results will be applied to simulation models, and advanced studies wouuld be available if the simulation models are well validated with the test results.

7철도차량의 충돌 시뮬레이션을 위한 유압 완충기의 특성 맵

저자 : 김진성 ( Jin Seong Kim ) , 최정흠 ( Jeong Heum Choi ) , 박영일 ( Yeong Il Park )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 41-47 (7 pages)

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The rolling stock is composed of several cars. In order to operate in combination, it is necessary to connect the device, called coupler, between the rolling stocks. When the collision occurs between cars, couplers should be able to absorb the shock. Urban railway has used only rubber absorbers. But recently, the hydraulic buffer has been considered in general railway. In order to know the performance of the buffer it should be conducted to experiments. But whenever this combination change, we should experiments to knowa lot of the dynamic behavior of each coupler. These experiments are generally replaced by the simulation, since a lot of time and cost consuming. The quasi-static map of hydraulic buffer obtained by the experiments is required for the simulation. However, the experiments for obtaining such a quasi-static map is costly and time consuming. In this paper, it proposes a method for deriving the quasi-static map of hydraulic buffer from the theoretical model.

8전자계 시뮬레이션 도구를 이용한 복합 형상의 접지 시스템 해석

저자 : 김영진 ( Young Jin Kim ) , 김재형 ( Jae Hyung Kim ) , 김성주 ( Sung Ju Kim )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 48-53 (6 pages)

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This paper deals with analysis of complex grounding system using electromagnetic simulation method. Electrical devices could be damaged by transient voltage such as a lightning surge. Therefore the measures to protect the equipments from transient, such as a lightning are required. The ground system is important in this respect. The representative parameter of grounding system performance is earth ground resistance. Precise prediction of earth resistance is required, because it is difficult to modify and change after the completion of the grounding system construction. Numerical modeling is often used in numerical analysis to identify the electrical characteristics of the grounding system. However complex systems are difficult to predict grounding characteristics by numerical analysis. If the total electric field of the earth in general is similar to the antenna model, in that the incident electric field and expressed as a sum of the scattering field. In this study, the electromagnetic field simulation tool “ANSYS HFSS” module containing the antenna model was used to analyze performance of ground system. Both the simple and complex grounding system were analyzed by simulation tool and experimental method. As a result simulation method is effective to predict performance of a complex ground system.

9원유저장탱크 방류벽의 콘크리트 바닥재 불침투성 세부기준 연구

저자 : 신창현 ( Chang Hyun Shin ) , 박재학 ( Jai Hak Park ) , 윤준헌 ( Jun Heon Yoon )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 54-60 (7 pages)

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The bottom of dikes must be kept impermeable to control hazardous chemicals spilled from storage tanks. Currently, insufficient related chemical control laws lead to a possibility to spread through the bottom. Generally, due to the high cost of installation and periodical maintenance, many businesses prefer to install the bottom with general concrete. But, since the impermeability of concrete is dependent on the kind of materials and chemical reaction, all concrete cannot be considered as impermeable material. Thus, it is necessary to make the installation standards of the dike bottom clear in order to avoid the argument over the impermeability and prevent the chemical accident. This study has suggested the standards of impermeable concrete by conducting 7-day exposure test to crude oil with the pilot dikes. The results have showed that the standards have the better impermeable performance compared with the germany standard, which have been penetrated at the maximum penetration depth of 1.9 cm. This study is expected to contribute to both the risk reduction of penetrating into the bottom and the cost reduction of spending to make the bottom of dikes impermeable.

10폐 열가소성 플라스틱 탄성체 분쇄물의 자연발화가능성에 관한 연구

저자 : 박영주 ( Young Ju Park ) , 이해평 ( Hae Pyeong Lee ) , 고경춘 ( Kyoung Chun Goh ) , 엄영섭 ( Young Sup Eom )

발행기관 : 한국안전학회(구 한국산업안전학회) 간행물 : 한국안전학회지(구 산업안전학회지) 31권 1호 발행 연도 : 2016 페이지 : pp. 61-65 (5 pages)

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In this study, we considered the ignition possibility for the shredded thermoplastic elastomer at the fire ground loaded the waste TPE. The average moisture content of the TPE sample was almost 0.33 wt.% at 110℃ and the range of ignition point was 461.9~491.9℃ approximately. In addition, we analyzed the change of weight and calorie the TPE sample according to temperature variations using the TG-DTA analyzer. As a result, the weight loss occurred twice in 250~420℃ and 420~473℃, and we found the second weight loss temperature range was the ignition point of TPE. Also, we conducted the spontaneous ignition tests of TPE for the wet and dry samples and we confirmed that the possibility of spontaneous ignition of TPE was very low. The elapsed time and humidity had little influence on the spontaneous ignition of TPE in this experimental conditions. In conclusion, the spontaneous of the shredded waste TPE in this study.

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