scholarly journals Performance Assessment of Japanese Electric Power Industry: DEA Measurement with Future Impreciseness

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 490 ◽  
Author(s):  
Toshiyuki Sueyoshi ◽  
Mika Goto
Keyword(s):  
Electric Power ◽  
Nuclear Power ◽  
Power Plants ◽  
Electric Power Industry ◽  
Japanese Government ◽  
Data Set ◽  
Nuclear Disaster ◽  
Power Company ◽  
Before And After ◽  
Policy Direction

This study examines the performance of Japanese electric power companies from 2003 to 2020. We use an observed data set from 2003 to 2015 and a forecasted data set from 2016 to 2020. The Japanese deregulation of the industry needs to be completed by April 2020. As a method, this study uses data envelopment analysis (DEA) environmental assessment, which measures performance from a holistic perspective. This research adds a new analytical capability to the DEA-based assessment by including an analytical ability to handle an “imprecise” data set. We apply the proposed approach to investigate the performance of these companies before and after the disaster of Fukushima Daiichi nuclear power plant (11 March 2011). All electric power companies have suffered from business damage due to the nuclear disaster. The Japanese government has developed a policy scheme on how to recover from the huge handling costs resulting from the disaster. Nuclear energy has been long considered the most useful approach to handle climate change. However, many industrial nations have changed policy direction since the nuclear disaster. The Japanese government allocates the costs to not only Tokyo Electric Power Company, which produced the nuclear disaster, but also the other incumbent electric power companies that own nuclear power plants. Under the current Japanese scheme, financial conditions have been gradually recovering from the damage due to the managerial efforts and by indirectly allocating the expenditure to consumers and tax payers.

scholarly journals Improvement of turbogenerators as a technical basis for ensuring the energy independence of Ukraine

2021 ◽  
pp. 19-30
Author(s):  
V. V. Shevchenko ◽  
A. N. Minko ◽  
M. Dimov
Keyword(s):  
Renewable Energy ◽  
Electric Power ◽  
Energy Security ◽  
Nuclear Power ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Electric Power Industry ◽  
Energy Sources ◽  
The World ◽  
Energy Independence

The paper defines the directions of improving turbogenerators as the basis for ensuring the energy independence of Ukraine. The analysis of the state, problems and prospects for the development of modern electric power industry. Goal of the work is to identify promising directions for sustainable development of the national electric power industry in order to ensure energy security of Ukraine, to conduct a comparative analysis of electricity sources, to confirm the need to improve the main sources – turbogenerators. Methodology. During the research, an analytical analysis of the electricity sources, which are installed at power plants in Ukraine and the world, was carried out, taking into account the growth of the planet's population and its energy activity. Cyclic theory was chosen as the theoretical basis for forecasting. On the basis of this theory, global development trends, advantages and disadvantages of currently used sources of electricity - thermal (including nuclear) power plants and stations that operate from renewable energy sources - have been established. A review of literary sources on the methods of the energy sector forecasting the development, including the development of the energy sector in Ukraine, has been carried out. Originality. It has been established that due to the active growth of the planet's population, with the increase in its energy activity, obtaining electricity from renewable energy sources is not enough, that for the next 20-30 years nuclear power plants will be the main sources of electricity. The internal and external threats to the energy security of Ukraine, directions of development of turbogenerator construction, ways to improve turbogenerators, to increase their energy efficiency, power per unit of performance, to increase the readiness and maneuverability factors, and overload capacity have been identified. Practical significance. The need to continue the modernization and improvement of the turbogenerators of nuclear power plant units, as the main sources of electricity, has been proved. The directions of their improvement are established: increasing the power in the established sizes, making changes to the design of the turbogenerators inactive elements, replacing the cooling agent to keep Ukrainian turbogenerators at the world level, improving auxiliary systems, improving and increasing the reliability of the excitation system, introduction of automatic systems for monitoring the state turbogenerators. Possible limits of use, advantages, disadvantages and problems of using renewable energy sources for Ukraine have been established.

The Effects of an Automated Maintenance Management System on Organizational Communication

1987 ◽  
Vol 31 (10) ◽  
pp. 1161-1165
Author(s):  
Marjorie B. Bauman ◽  
Donna Churchill-Teran ◽  
Harold P. Van Cott
Keyword(s):  
Electric Power ◽  
Case Studies ◽  
Management System ◽  
Nuclear Power ◽  
Power Plants ◽  
Electric Power Industry ◽  
Maintenance Management ◽  
Functional Requirements ◽  
Information Requirements ◽  
The Impact

This paper describes Electric Power Research Institute (EPRI) sponsored case studies of two nuclear power plants that automated their maintenance management system in an effort to improve maintenance processing. These case studies evaluated the impact of an automated maintenance management system (AMMS) on the organizational interfaces and information requirements of a variety of system users. The goal of the project was to provide guidance to the electric power industry in maintenance management system design. A product of the investigation was a set of guidelines for use by utilities in conducting a front-end functional requirements analysis to help define major information requirements and organizational and data file interfaces.

Recent Activity of KEPIC Application for Construction and Operation of Nuclear Power Plants in Korea

2010 ◽  
Author(s):  
Hoonseok Byun ◽  
Jonghae Kim ◽  
Youngho Son ◽  
Banuk Park
Keyword(s):  
Heat Treatment ◽  
Electric Power ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Electric Power Industry ◽  
Pressure Vessels ◽  
Equivalent Material ◽  
Mechanical Field ◽  
Technical Requirements

Korea Electric Power Industry Code (KEPIC), a set of integrated standards applicable to the design, construction and operation of electric power facilities including nuclear power plants, has been developed on the basis of referring to the prevailing U.S. codes and standards which had been applied to the electric power facilities in Korea. KEPIC has been applied to the construction of Ulchin Nuclear Units 5&6 since 1997 as per the endorsement of Ministry of Education, Science and Technology (MEST), and is being completely applied to the construction of Shin-Kori and Shin-Wolsung Nuclear Power Plants (NPPs) in Korea. Although the technical requirements of KEPIC related to design and inspections for pressure vessels have been developed on the basis of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC), Korea Electric Association (KEA) that is KEPIC maintenance organization is trying to find and improve unreasonable requirements based on the acquired experiences for the continuous construction and operation of NPPs. In the administrative requirements, KEPIC, unlike ASME, adopted not only mechanical field but also electrical field related to NPPs. Furthermore, the qualifying system for services such as Nondestructive Examination, Heat Treatment, Design and Equipment Qualification Organization was adopted to improve safety and reliability for NPPs. In the technical requirements, KEA has been performing betterment study such as pressures for system hydrostatic test, temperatures for Post-Weld Heat Treatment (PWHT) of P-No. 4 materials, counterbore for Pre-Service Inspection (PSI) of elbows in piping systems. The construction method of Steel Plate Concrete (SC) structure studied by Korea Hydro & Nuclear Power Co., Ltd. (KHNP), has been adopted to KEPIC, recently. In the case of inservice NPPs, KEA is trying to establish the equivalent material tables for ASME unassigned materials to solve problems of material during the Repair & Replacement step. KEA is performing development study for Standard Welding Procedure Specification (SWPS) which can be used for production weld without any specific procedure qualification test performed by manufacturers in order to improve reliability and reduce costs. The SWPS will be adopted in KEPIC-MQW Appendix. KEA hopes to collaborate and grow with other Standard Development Organizations (SDOs) through the above efforts.

The Present and the Future of the Korea Electric Power Industry Code

2008 ◽  
Author(s):  
Hoonseok Byun ◽  
Seogchan Yoon ◽  
Jonghae Kim ◽  
Samchul Lee
Keyword(s):  
Electric Power ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Good Practice ◽  
Electric Power Industry ◽  
Power Industry ◽  
International Standards ◽  
National Standards ◽  
Design Construction

Korea Electric Power Industry Code (KEPIC), a set of integrated standards applicable to the design, construction and operation of electric power facilities including nuclear power plants, has been developed on the basis of referring to the prevailing U.S. codes and standards which had been applied to the electric power facilities in Korea. Being the developing and managing organization of KEPIC, Korea Electric Association (KEA) published its first edition in 1995, the second in 2000 and the latest in 2005. KEPIC has been applied to the construction of nuclear power plants since 1997 in Korea. Along with the effectuation of the Agreement on Technical Barriers to Trade (TBT) in 1995, the international trend related to codes and standards is changing rapidly. KEA is, therefore, making its utmost efforts so as for KEPIC to keep abreast with the changing environment in international arena. KEA notified ISO/IEC Information Centre of its acceptance of the Code of Good Practice in the Agreement on TBT. Also the 2005 edition of KEPIC was published to be retrofitted according to the ISO/IEC Guide 21-Adoption of International Standards as regional or national standards. On the other hand, KEA is continuously performing to study on the improvement of KEPIC requirements. Such KEA’s efforts will help KEPIC correspond with international standards such as ISO/IEC standards, and internationally recognized standards such as ASME codes and standards. Furthermore KEA will expedite the publication of the bilingual edition of KEPIC at 2010 as per the globalization plan and KEA hopes that KEPIC can assist Korea Electric Power Corporation (KEPCO) and Korea Hydro & Nuclear Power Co., Ltd. (KHNP) in exportation of Korea Standard Nuclear Power Plant (KSNP) such as OPR-1000 and APR-1400 by the bilingual edition.

Introduction to KEPIC (Korea Electric Power Industry Code)

2013 ◽  
Author(s):  
Myoung-Sung Sohn ◽  
Hyun-Jae Joo ◽  
Hoon-Seok Byun ◽  
Jong-Hae Kim
Keyword(s):  
Electric Power ◽  
Nuclear Power ◽  
Power Plants ◽  
Electric Power Industry ◽  
Power Industry ◽  
Pressure Vessels ◽  
National Standards ◽  
Nondestructive Examination ◽  
Mechanical Field ◽  
Technical Requirements

Korea Electric Power Industry Code (KEPIC) has been developed on the basis of referring to the prevailing U.S. codes and standards which had been applied to the electric power facilities in Korea. KEPIC has been applied to the construction of Ulchin Nuclear Units 5&6 since 1997 as per the endorsement of Ministry of Science and Technology, and is being completely applied to the construction of Shin-Kori and Shin-Wolsung Nuclear Power Plants (NPPs) in Korea and of Barakah NPPs in UAE. Although the technical requirements of KEPIC related to design and inspections for pressure vessels have been developed on the basis of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC), Korea Electric Association (KEA) that is KEPIC maintenance organization is trying to find and improve unreasonable requirements based on the acquired experiences for the continuous construction and operation of NPPs. In the administrative requirements, KEPIC, unlike ASME, adopted not only mechanical field but also electrical field related to NPPs. Furthermore, the qualifying system for services such as Nondestructive Examination, Heat Treatment, Design and Equipment Qualification Organization was adopted to improve safety and reliability for NPPs. In the technical and administrative requirements, KEA has been performing betterment studies such as ‘integration of welding coordinator in welding quality system of KEPIC’, ‘induction of Korean national standards (KS) materials equivalent to ASME/ASTM materials into KEPIC-MH codes’. The result of study for development of Steel-plate Concrete (SC) structure and modularization technique for NPPs has been adopted to 2010 edition of KEPIC-SNG.

scholarly journals Analysis of the Regionality of the Number of Tweets Related to the 2011 Fukushima Nuclear Power Station Disaster: Content Analysis (Preprint)

2017 ◽  
Author(s):  
Tomohiro Aoki ◽  
Teppei Suzuki ◽  
Ayako Yagahara ◽  
Shin Hasegawa ◽  
Shintaro Tsuji ◽  
...  
Keyword(s):  
Social Media ◽  
Electric Power ◽  
Nuclear Power ◽  
Fukushima Prefecture ◽  
Media Companies ◽  
Nuclear Disaster ◽  
Power Company ◽  
The People ◽  
Fukushima Daiichi ◽  
Electric Power Company

BACKGROUND The Great East Japan Earthquake on March 11, 2011, triggered a huge tsunami, causing the Fukushima Daiichi nuclear disaster. Radioactive substances were carried in all directions, along with the risks of radioactive contamination. Mass media companies, such as television stations and news websites, extensively reported on radiological information related to the disaster. Upon digesting the available radiological information, many citizens turned to social media, such as Twitter and Facebook, to express their opinions and feelings. Thus, the Fukushima Daiichi nuclear disaster also changed the social media landscape in Japan. However, few studies have explored how the people in Japan who received information on radiation propagated the information. OBJECTIVE This study aimed to reveal how the number of tweets by citizens containing radiological information changed regionally on Twitter. METHODS The research used about 19 million tweets that included the terms “radiation,” “radioactivity,” and “radioactive substance” posted for 1 year after the Fukushima Daiichi nuclear disaster. Nearly 45,000 tweets were extracted based on their inclusion of geographic information (latitude and longitude). The number of monthly tweets in 4 districts (Fukushima Prefecture, prefectures around Fukushima Prefecture, within the Tokyo Electric Power Company area, and others) were analyzed. RESULTS The number of tweets containing the keywords per 100,000 people at the time of the casualty outbreak was 7.05 per month in Fukushima Prefecture, 2.07 per month in prefectures around Fukushima Prefecture, 5.23 per month in the area within Tokyo Electric Power Company, and 1.35 per month in others. The number of tweets per 100,000 people more than doubled in Fukushima Prefecture 2 months after the Fukushima Daiichi nuclear disaster, whereas the number decreased to around 0.7~0.8 tweets in other districts. CONCLUSIONS The number of tweets per 100,000 people became half of that on March 2011 3 or 4 months after the Fukushima Daiichi Nuclear Plant disaster in 3 districts except district 1 (Fukushima Prefecture); the number became a half in Fukushima Prefecture half a year later.

Evaluation of Safety Culture Promoting Activities: Chubu’s Challenge

2010 ◽  
Author(s):  
Satoshi Kurata ◽  
Tetsuya Suzuki
Keyword(s):  
Electric Power ◽  
Safety Culture ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Nuclear Safety ◽  
Evaluation Tools ◽  
Nuclear Operators ◽  
Power Company ◽  
Electric Power Company

Nuclear safety culture has been one of the most important aspects for safe and reliable operations of nuclear power plants worldwide. Japanese nuclear operators started promoting Safety Culture using the PDCA (Plan-Do-Check-Action) cycle in December 2007. Chubu Electric Power Company has been developing the system of promoting safety culture and challenging to develop evaluation tools for safety culture.

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