• Title/Summary/Keyword: Nuclear power plants

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Effects of the Training Transfer Management on the Workers in Nuclear Power Plants

  • Kim, Seonsu;Luo, Meiling;Lee, Yong-Hee
    • Journal of the Ergonomics Society of Korea
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    • v.33 no.1
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    • pp.49-58
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    • 2014
  • Objective: The aim of this study is to enhance the efficiency of education and training through application and management of 'Transfer of Training' in nuclear power plants. Background: Despite the sophistication and standardization of job-related skills and techniques of workers, accidents/incidents keep taking place due to human errors and unsafe actions and behaviors, which translates into the necessity to review and examine the effectiveness and influence of education and training on the workers of nuclear power plants. Method/Results: This study drew the factors of 'Transfer of Training' through a review on the preceding studies and document research. In addition, through expert examination, this study explored the expected effects and possibility of application when managing the influencing factors of 'Transfer of Training' in nuclear power plants. And lastly, management priority order for nuclear power plants was drawn through an AHP analysis. Conclusion: Among the 'Transfer of Training' factors, the training design factor was the most important. In addition, the design of the training and transfer and goal setting showed a high degree of importance among the influencing factors. Application: The management of 'Transfer of Training' in nuclear power plants enhances the capability of workers and improves the operational integrity of nuclear power plants.

A Comparative Study on NIMBY to Nuclear Power Plants (원자력발전소에 대한 님비의 정량적 측정과 비교)

  • Won, DooHwan
    • Environmental and Resource Economics Review
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    • v.28 no.4
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    • pp.557-581
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    • 2019
  • This study tries to quantify the regional NIMBY costs to nuclear power plants. NIMBY costs are estimated as willingness to pays for avoiding nuclear power plants near residential areas through the contingent valuation method(CVM). In the study, it was assumed that the nuclear power plants were newly constructed around the residences. The result of 600 respondents living within a radius of 30 km of nuclear power plants compared to the result of 600 respondents living in the metropolitan area, which revealed that there were significant NIMBY costs to the construction of nuclear power plants in all residences. By region, the willingness to pay in the metropolitan area was greater than that in the nuclear power areas. This study focuses on NIMBY to nuclear power plants from a regional point of view, which can provide important information in establishing prudent and sound nuclear power policies.

Cluster Head Chain Routing Protocol suitable for Wireless Sensor Networks in Nuclear Power Plants (원전 무선 센서 네트워크에 적합한 클러스터 헤드 체인 라우팅 프로토콜)

  • Jung, Sungmin
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.16 no.2
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    • pp.61-68
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    • 2020
  • Nuclear power plants have a lower cost of power generation, and they are more eco-friendly than other power generation plants. Also, we need to prepare nuclear plant accidents because of their severe damage. In the event of a safety accident, such as a radiation leak, by applying a wireless sensor network to a nuclear power plant, many sensor nodes can be used to monitor radiation and transmit information to an external base station to appropriately respond to the accident. However, applying a wireless sensor network to nuclear power plants requires routing protocols that consider the sensor network size and bypass obstacles such as plant buildings. In general, the hierarchical-based routing protocols are efficient in energy consumption. In this study, we look into the problems that may occur if hierarchical-based routing protocols are applied to nuclear power plants and propose improved routing protocols to solve these problems. Simulation results show that the proposed routing protocol is more effective in energy consumption than the existing LEACH protocol.

Effects of Trust, Stigma, Optimistic Bias on Risk Perception of Nuclear Power Plants (원자력발전소에 대한 공중의 신뢰, 낙인과 낙관적 편향성이 위험인식에 미치는 효과)

  • Song, Hae-Ryong;Kim, Won-Je
    • The Journal of the Korea Contents Association
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    • v.13 no.3
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    • pp.162-173
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    • 2013
  • This study was to examine the effect of trust, stigma, optimistic bias on risk perception of nuclear power plants. For this study, we carried out a survey targeting residents, total of 383, living in Seoul. The findings showed that trust of general public on nuclear power plants influenced negatively on stigma. Second, trust of general public on nuclear power plants influenced not significantly on optimistic bias. Third, stigma of general public on nuclear power plants influenced positively on risk perception. Fourth, optimistic bias of general public on nuclear power plants influenced negatively on risk perception.

Repair and Replacement Methodology for Electrical Equipment Used in Nuclear Power Plants (원자력발전소 전기기기의 보수, 교체 방법론)

  • Park, Chulhee;Park, Wan-gyu;Lee, Manbok;Kim, Choon-sam
    • Proceedings of the KIPE Conference
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    • pp.177-179
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    • 2018
  • After Fukushima nuclear accident at 2011, nuclear industrial has been focused on operation and maintenance phase, not design and construction phase. Continued good operating performance of nuclear power plants has been the best critical issue to nuclear utilities. Replacement for complete components as well as parts of components is being procured because nuclear utilities must maintain safety and reliability of operating nuclear power plants. However, many suppliers and manufacturers are giving up a nuclear quality assurance program under reduction in new construction of nuclear power plants. It is able to be increased difficulty in procuring spare parts to support operations and maintenance of nuclear power plants. Over 20% of nuclear power plant equipment in some countries is obsolete. Owing to obsolescence of nuclear safety-related items and/or withdrawing a nuclear quality assurance program of suppliers and manufactures, some replacement item and part might be procured to the item not covered by appendix B to USNRC 10 CFR Part 50. Under various methods of the nuclear repair and replacement methodology, utilities are supposed to establish a typical program for a repair and replacement of an electrical equipment and its parts in conjunction with a nuclear quality assurance. Concerning this typical program, this study suggests the repair and replacement methodology of electrical equipments used in nuclear power plants by procurement of a power supply, based on nuclear regulations, codes, standards, guidelines, specific and general technical information, etc..

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Examination History and Abnormal Thyroid and Breast Lesions According to Residential Distance from Nuclear Power Plants

  • Lim, Young-Khi
    • Journal of Radiation Protection and Research
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    • v.41 no.4
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    • pp.402-408
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    • 2016
  • Background: Ascertainment bias are common in epidemiologic studies to assess the association between thyroid cancer risk and living near nuclear power plants because many thyroid cancers are diagnosed by chance through health examination. We surveyed the ultra sonography (USG) examination history and conducted thyroid and breast USG in residents living near nuclear power plants. Materials and Methods: The study population comprised 2,421 residents living near nuclear power plants in Korea. Information on demographic characteristics, including diagnostic examination history, was collected by interview using questionnaires. USG examination was conducted to evaluate the presence of thyroid nodules and breast lesion. Study participants were divided into 3 groups according to the distance of their respective villages from a nuclear power plant. The proportions of USG examination history and prevalence of thyroid nodules and breast lesions were compared between groups. Results and Discussion: Examination histories of thyroid USG were 23.1%, 13.7%, and 10.5% in men and 31.3%, 26.7%, 18.3% in women in the short, intermediate, and long distance groups, respectively. There were significant inverse associations between thyroid USG history and the distance from nuclear power plants (P for trend = 0.001 for men and 0.017 for women). However, there was no association between the distance of villages from nuclear power plants and prevalence of thyroid nodules. Conclusion: Our results suggest that there may be an ascertainment bias in population-based studies examining the harmful effects of NPPs examination and researchers should pay attention to ascertainment bias resulted from differential health examination. Correction for ascertainment bias, active follow-up and examination for all study population to remove differential health examination is needed.

The Effects of Standardization for the Nuclear Power Plants in Korea

  • Kim, Kyoung-Pyo;Kim, Seung-Su;Lee, Young-Gun
    • Journal of the Korean Society for Quality Management
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    • v.18 no.2
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    • pp.69-80
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    • 1990
  • This paper highlights the economic effects of nuclear power plants standardization in Korea. The major effects of nuclear power plants standardization appear in the reduction of time-related costs. By using this major economic effects of standardization, an optimal plant mix of electric power until the year 2005 is suggested by means of WASP computer model. And the effects between the standardized case and the non-standardized case is compared.

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A Development of Eddy Current Testing System for Steam Generators Inspection in Nuclear Power Plants (원전 증기발생기 와전류검사 시스템 개발)

  • Moon, Gyoon-Young;Cho, Chan-Hee;Yoo, Hyun-Joo;Lee, Tae-Hun;Cho, Yong-Bae
    • Transactions of the Korean Society of Pressure Vessels and Piping
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    • v.9 no.1
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    • pp.40-47
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    • 2013
  • The capacity factor of nuclear power plant in Korea is the highest level in the world. However, the integrity assessment of nuclear power plant is depended on foreign country. Especially, most eddy current testing systems for inspecting steam generators in nuclear power plant are currently imported from USA, Canada, and so on. Therefore, the eddy current testing system can react more active and adaptive from economic and managerial standpoint for actual nuclear power plants in Korea is required. In this paper, an eddy current testing system for inspecting steam generators in nuclear power plants is introduced. Frequency generator, analog circuit, analog digital converter circuit, and digital control circuit are composed in eddy current testing system. A benchmarking of acquisition system and acquisition software, eddynet 11i made by Zetec, and modifications are carried out based on the test environment of Korea nuclear power plants. Finally, all eddy current apparatus are integrated to inspect steam generator tubes in nuclear power plants.

Effects of Risk Perception on Risk Attitude and Risk Acceptance of Nuclear Power Plants (원전주변 지역주민의 위험지각이 위험태도와 위험수용에 미치는 영향)

  • Song, Hae-Ryong;Kim, Won-Je
    • The Journal of the Korea Contents Association
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    • v.12 no.6
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    • pp.238-248
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    • 2012
  • This research examined the effect of risk perception on risk attitude and risk acceptance of nuclear power plants. For this study, we carried out a survey targeting local residents living in Gyeong-ju..And we examined how risk perception of nuclear power plants have influences the risk attitude and risk acceptance including distrust on government's polices and perceived benefit. First, The findings showed that risk perception of nuclear power plants influenced positively on risk attitude. Second, risk attitude of nuclear power plants influenced negatively on risk acceptance. Third, distrust on government's polices influenced negatively on risk acceptance. Fourth, perceived benefit influenced positively on risk acceptance.

A Simulation Method of PID Tuning with Process Modeling in Operating Nuclear Power Plants (가동원전에서 공정모델링을 통한 PID 튜닝 시뮬레이션 방법)

  • Min, Moon-Gi;Jung, Chang-Gyu;Lee, Kwang-Hyun;Lee, Jae-Ki;Kim, Hee-Je
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.63 no.4
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    • pp.290-294
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    • 2014
  • PID(Proportional, Integral, Derivative) controller is the most popular process controllers in nuclear power plants. The optimized parameter setting of the process controller contributes to the stable operation and the efficiency of the operating nuclear power plants. PID parameter setting is tuned when new process control systems are installed or current process control systems are changed. When the nuclear plant is shut down, a lot of PID tuning methods such as the Trial and Error method, Ultimate Oscillation method operation, Ziegler-Nichols method, frequency method are used to tune the PID values. But inadequate PID parameter setting can be the cause of the unstable process of the operating nuclear power plant. Therefore the results of PID parameter setting should be simulated, optimized and finally verified. This paper introduces the simulation method of PID tuning to optimize the PID parameter setting and confirms them of the actual PID controller in the operating nuclear power plants. The simulation method provides the accurate process modeling and optimized PID parameter setting of the multi-loop control process in particular.