• Journal of the Korean Society of Radiology
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• v.17 no.1
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• pp.79-90
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• 2023

The study is to estimate the social costs of premature deaths due to nuclear power plant(NPP) accidents, by resorting to the contingent valuation method(CVM) which is used to estimate the value of a statistical life(VSL). The VSL estimate is about 3.55 billion won, which is multiplied by some 1.8 million premature deaths due to the accidents in world history of NPP, to get a maximum social cost of 1,952 trillion won. This estimate is equivalent to the 2022 real GDP of Korea. The annual average number of premature deaths and the resulting average social cost is 26,000 and 28 trillion won, respectively. The social cost of premature deaths due not only to accidents, but also the air pollutants from fired power plants(FPP) during 1987~2021 is estimated to be 26,919 trillion won. This is equivalent to 2021 US GDP, and is about 3,000 times higher than that for NPP of 9 trillion won. In 2021, the estimated social costs of FPP and NPP are 1,075 trillion won and 292 billion won, respectively. For South Korea, the study suggests to adapt an energy mix of increased share of electricity production for NPP relative to FPP, given that the 2050 carbon neutrality strategy of Korea is expected to lead to an increased share of renewable energy in electricity production. The study emphasizes accumulating the number of CVM-based VSL studies to ensure efficient energy policies.

• Proceedings of the Korea Society for Simulation Conference
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• 1999.10a
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• pp.46-46
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• 1999

터빈 바이패스 밸브는 발전소의 사고시 발전기가 계통으로부터 분리될 때 터빈을 보호하기 위해 고온고압 에너지를 가진 증기를 안전하게 바이패스하여 발전소 신뢰도를 향상시키는 주요설비로써 신속하고 안전하게 제어가 되어야 한다. 이를 위해 증기온도 제어에 관측기를 가진 상태변수 제어기 등 고급제어가 사용되며 하동화력 시뮬레이터에 사용되는 터빈 바이패스 밸브제어의 개발과정을 서술한다. 디지털제어의 개발은 우선 제어모듈을 분석한 후 각 기능별 제어모듈을 개발하여 충분히 시험한 수 이것을 이용하여 제어로직을 모델링한다. 제어 모델링이 완료되면 발전소 다아나믹 모델과 연계를 위해 각 변수의 이출력(I/O)을 설정한다. I/O에 의해 제어로직과 발전소의 다이나믹 모델을 접속한 후 최종 튠닝(Turning)을 통하여 개발을 마무리하게 된다. 터빈 바이패스 밸브 바이패스 제어의 개발 의의를 살펴보면 각종 제어기능에 따른 모듈의 개발과 이의 적용을 통해서 실제 제어로직의 설계가 가능하며 또한 동적모델과 연계한 시뮬레이션을 통해 정확도를 높일 뿐만 아니라 확장된 제어의 개발도 가능하게 된다.

• Fire Science and Engineering
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• v.32 no.1
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• pp.89-98
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• 2018

Fire accidents in foreign countries, like the accident in a thermal power plant in Beijing, the accidents in domestic power plants, including Boryeong Power Plant in 2012 and Taean Power Plant in 2016, a disaster in a nuclear power plant in Fukushima in 2011 or the large-scale power failure in California in 2001 are safety accidents related to electric power, which caused losses in the people's stable lives and the countries. Electricity has an absolute impact on the people's life and the economy, so we can easily expect the serious situation affecting economic growth as well as direct damage to the protection of the people's lives and the losses of properties, if there are fire or explosion accidents or radioactive leak because of negligence in safety management, or problems because of natural disasters like an earthquake in power plants that generate electricity. In this study, it was drawn the improvement of the organizations exclusively in charge of firefighting, the operation of a program for the improvement of professional competency, the development of a customized firefighting management system for plants for systematic firefighting safety management and the improvement of the earthquake-proof correspondence system, which has recently become an issue, as measures for improvements through a survey of the actual conditions concerning the necessity of the construction of a firefighting safety management system for power plants with five power generation companies, including Korea Southern Power Co., Ltd., and the persons in charge of firefighting safety Korea Hydro & Nuclear Power Co., Ltd.

• Transactions of the Korean hydrogen and new energy society
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• v.34 no.6
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• pp.698-711
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• 2023

Consequence analysis using an ALOHA program is conducted to calculate the accidental impact ranges in the cases of hydrogen leakage, explosion, and jet fire in a hydrogen fueled combined cycle power plant. To evaluate the effect of weather conditions and topographic features on the damage range, ALOHA is executed for the power plants located in the inland and coastal regions. The damage range of hydrogen leaked in coastal areas is wider than that of inland areas in all risk factors. The obtained results are expected to be used when designing safety system and establishing safety plans.

• Journal of Korean Society of Disaster and Security
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• v.16 no.3
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• pp.1-15
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• 2023

This study focuses on modeling the impact of ammonia leakage from the storage tank in a combined cycle power plant's flue gas denitrification facility. It employs accident impact assessments and diffusion models to determine the optimal scenarios for ammonia storage tank leakage accidents. The study considers the operating conditions of variables as standard conditions for predicting the extent of damage. The Taean combined cycle power plant is chosen as the target area, taking into account seasonal factors such as temperature, humidity, wind speed, atmospheric stability, and wind direction. By utilizing a Gaussian diffusion model, the concentration of ammonia gas at various locations is estimated to assess the potential extent of external damage resulting from a leak. The study reveals that in conditions of high temperature and stable atmosphere within the specified range, lower wind speeds contribute to increased damage to the human body due to ammonia diffusion.

• Journal of the Korean Institute of Gas
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• v.17 no.2
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• pp.70-77
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• 2013

The present study has been carried out to analyze the effect of steam hammering on the steam piping system including the final superheater, the high pressure turbine, check valve and the first reheater by sudden stoping of main stop valve in a power plant. For the present steam hammering analysis, the well known Flowmaster software has been used to model the steam piping system and the time dependent characteristics of pressure and steam mass flow rate has been conducted. Using the result of the unsteady pressure and steam mass flow rate, the forces acting on the elbows in the piping system has been derived. From the present analysis, it has been elucidated that the elbow just before the main stop valve and the elbow near the connection pipe between bypass pipe and check valve had the largest force among the elbows in the steam piping system. The structural safety diagnostics study on the elbow and the supporting structures of the steam piping system of a power plant will be conducted in the future by the present results of the forces acting on the elbow.

• Journal of the KSME
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• v.20 no.5
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• pp.353-359
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• 1980

원자력산업은 막대한 자본이 필요로 하는 거대한 장치산업이다. 호기당 10억$ 이상되는 막대한 자금과 복잡한 계통으로 되어 있다. 더구나 100만 kw 전기출력의 원자력발전소를 1년가동후의 노심의 방사능은 무노 약 170억 규리(Ra로 17,500ton 해당)에 해당한다. 이것은 자연방사능만 존재하던 것이 인공방사능의 발생을 말한다. TMI-2원자로의 사고로 상업용원자력발전소의 안 전성확보 문제는 재평가하게 되었다. 미국원자력문제위원회에서는 그동안 각계각층에서 조사검 사한 사고분석평가 결과를 집약한 행동지침(NRC Action Plan: LUREG-0660)을 금년 5월에 학 정발표하였다. 즉 운전중인 발전소 및 운전면허를 받고 저 하는 전기사업자에 대하여 원자로안 전운전, 부지재평가가 설계변사 및 긴급퇴피계획분야에 대한 구체적인 행동지침을 제시하고 있다. 우리나라에서도 원자력발전이 유일한 대체에너지로 계획추진되고 있는 현시점에서 원자력발전 소의 안전성확보문제는 에너지수금계획에 못지 않은 중대한 과제라고 본다. 이러한 안전성문제를 제도적으로 관찰하기 위한 독자적인 규제기준의 규정이 가장 시급하며, 부지선정, 운전원의 훈련 방사선방어대책 등 우리나라 실정에 맞는 단장기계획을 국가적인 차원에서 수립해야 한다고 본다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.6
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• pp.187-193
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• 2018

There has been a gradual increase in the demand for the electric power in Korea. In order to meet the demand, power station should have technical functions with increased effectiveness. When accident happens in electric machinery at power stations, huge amount of economic losses and mulfunction of equipments occur. One of the accidents is a deteriorated cables operating power stations. In order to prevent cable accident in advance, we should monitor the insulation status of the cable. Cable accidents are resulting from the junctions. We have developed and installed a device in order to identify the status of junction part of power cable at Korea Western Power Co., Ltd.. We performed an accurate diagnosis for the stable utilization of junctions where the accidents occurs most frequently, and to increase the reliability. In this paper, we present the concepts of our device and the method of monitoring diagnosis for the stable use of junctions at cables predicting the life time of cables by analyzing the data obtained by the device. We also present the hardware aspect of the device we have developed.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.1
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• pp.207-212
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• 2017

The cables installed to deliver high electric power from a generator at a thermoelectric power station are XLPE (or CV) cables. Depending on the installation and usage conditions, the cables in operation start deteriorating from the time of initial operation. Some cables can cause accidents due to faulty construction or other environmental factors. In order to prevent cable accidents, regular auditing of power cables is required. We have invented a measuring device for systematic surveillance and prevention of accidents, and installed the device at Korean Western Power Co. Ltd. which measures load currents through the cables. In this paper, we present the load current measured using our device, analyze the load characteristics by measures current, compare the ampacity defined by IEC standard, and present a basic data to obtain the temperature of cable conductors.

• Journal of the Society of Disaster Information
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• v.15 no.2
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• pp.268-281
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• 2019

Purpose: The purpose of this study was to find out how the administrative paradigm of the times affected the public sector's fire. Method: For this purpose, we investigated the New Public Management (NPM). In addition, the reasons of fire accident of Boryeong thermal power plant were analyzed in the limited values of NMP. Result: In theoretical investigation, the 3 values (managerial accountability, efficiency, expertise) of NMP and evaluation criteria were drew out. In investigation on reasons of fire accident, the improvement of accountability and expertise was insufficient due to the emphasis of the efficiency based on the introduction to free market by neoliberalism in public sector. Conclusion: In conclusion, we confirmed that the values of NMP were limited to forcingly apply to the public sector. This study is expected to contribute basic research references to fire administration theory.