The Experts below are selected from a list of 3966 Experts worldwide ranked by ideXlab platform
Go Chiba - One of the best experts on this subject based on the ideXlab platform.
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research activities on nuclear reactor physics and thermal hydraulics in japan after Fukushima Daiichi Accident
Journal of Nuclear Science and Technology, 2018Co-Authors: Shuichiro Miwa, Yasunori Yamamoto, Go ChibaAbstract:Research and development in nuclear reactor physics and thermal-hydraulics continue to be vital parts of nuclear science and technology in Japan. The Fukushima Accident not only brought tremendous change in public attitudes towards nuclear engineering and technology, but also had huge influence towards the research and development culture of scientific communities in Japan. After the Fukushima Accident, thorough Accident reviews were completed by independent committees, namely, Tokyo Electric Power Company (TEPCO), the Japanese government, the Diet of Japan, the Rebuild Japan Initiative Foundation, and the Nuclear and Industrial Safety Agency. Reactor physics and thermal-hydraulics divisions of Atomic Energy Society of Japan (AESJ) also issued the roadmaps after the Accident. As a result, lessons learned from the Accident were made clear, and a number of new research activities were initiated. The present paper reviews ongoing nuclear engineering research activities in Japanese institutes, univers...
Shuichiro Miwa - One of the best experts on this subject based on the ideXlab platform.
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research activities on nuclear reactor physics and thermal hydraulics in japan after Fukushima Daiichi Accident
Journal of Nuclear Science and Technology, 2018Co-Authors: Shuichiro Miwa, Yasunori Yamamoto, Go ChibaAbstract:Research and development in nuclear reactor physics and thermal-hydraulics continue to be vital parts of nuclear science and technology in Japan. The Fukushima Accident not only brought tremendous change in public attitudes towards nuclear engineering and technology, but also had huge influence towards the research and development culture of scientific communities in Japan. After the Fukushima Accident, thorough Accident reviews were completed by independent committees, namely, Tokyo Electric Power Company (TEPCO), the Japanese government, the Diet of Japan, the Rebuild Japan Initiative Foundation, and the Nuclear and Industrial Safety Agency. Reactor physics and thermal-hydraulics divisions of Atomic Energy Society of Japan (AESJ) also issued the roadmaps after the Accident. As a result, lessons learned from the Accident were made clear, and a number of new research activities were initiated. The present paper reviews ongoing nuclear engineering research activities in Japanese institutes, univers...
Yasunori Yamanaka - One of the best experts on this subject based on the ideXlab platform.
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unsolved issues related to thermal hydraulics in the suppression chamber during Fukushima Daiichi Accident progressions
Journal of Nuclear Science and Technology, 2016Co-Authors: Shinya Mizokami, Daichi Yamada, Takeshi Honda, Daisuke Yamauchi, Yasunori YamanakaAbstract:ABSTRACTOn 11 March 2011, the Great East Japan Earthquake and Tsunami hit the Fukushima Daiichi Nuclear Power Station. The Fukushima Daiichi Units 1–3 lost all DC and AC power supplies, which set in motion a chain of events that led to releases of radioactivity to the environment. Since then, TEPCO has made many efforts to investigate the Accident progressions and the status of the reactors and containment vessels. However, there still exist several tens of unsolved issues to be investigated for the fully understanding of the Accident. In this paper, we introduce the unsolved issues related to thermal-hydraulics in the suppression chamber during the Fukushima Daiichi Accident progressions. Especially, in Units 2 and 3, there are possibilities that thermal stratification inside their suppression chambers played an important role. It is important that these phenomena are addressed following both theoretical and experimental approaches as support to severe Accident simulations.
Yasunori Yamamoto - One of the best experts on this subject based on the ideXlab platform.
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research activities on nuclear reactor physics and thermal hydraulics in japan after Fukushima Daiichi Accident
Journal of Nuclear Science and Technology, 2018Co-Authors: Shuichiro Miwa, Yasunori Yamamoto, Go ChibaAbstract:Research and development in nuclear reactor physics and thermal-hydraulics continue to be vital parts of nuclear science and technology in Japan. The Fukushima Accident not only brought tremendous change in public attitudes towards nuclear engineering and technology, but also had huge influence towards the research and development culture of scientific communities in Japan. After the Fukushima Accident, thorough Accident reviews were completed by independent committees, namely, Tokyo Electric Power Company (TEPCO), the Japanese government, the Diet of Japan, the Rebuild Japan Initiative Foundation, and the Nuclear and Industrial Safety Agency. Reactor physics and thermal-hydraulics divisions of Atomic Energy Society of Japan (AESJ) also issued the roadmaps after the Accident. As a result, lessons learned from the Accident were made clear, and a number of new research activities were initiated. The present paper reviews ongoing nuclear engineering research activities in Japanese institutes, univers...
Shinya Mizokami - One of the best experts on this subject based on the ideXlab platform.
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unsolved issues related to thermal hydraulics in the suppression chamber during Fukushima Daiichi Accident progressions
Journal of Nuclear Science and Technology, 2016Co-Authors: Shinya Mizokami, Daichi Yamada, Takeshi Honda, Daisuke Yamauchi, Yasunori YamanakaAbstract:ABSTRACTOn 11 March 2011, the Great East Japan Earthquake and Tsunami hit the Fukushima Daiichi Nuclear Power Station. The Fukushima Daiichi Units 1–3 lost all DC and AC power supplies, which set in motion a chain of events that led to releases of radioactivity to the environment. Since then, TEPCO has made many efforts to investigate the Accident progressions and the status of the reactors and containment vessels. However, there still exist several tens of unsolved issues to be investigated for the fully understanding of the Accident. In this paper, we introduce the unsolved issues related to thermal-hydraulics in the suppression chamber during the Fukushima Daiichi Accident progressions. Especially, in Units 2 and 3, there are possibilities that thermal stratification inside their suppression chambers played an important role. It is important that these phenomena are addressed following both theoretical and experimental approaches as support to severe Accident simulations.
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Event Sequence of the Fukushima Daiichi Accident
Reflections on the Fukushima Daiichi Nuclear Accident, 2014Co-Authors: Shinya Mizokami, Yuji KumagaiAbstract:On March 11, 2011, the Great East Japan Earthquake and subsequent tsunami hit Fukushima Daiichi Nuclear Power Station. Flooding by the tsunami induced loss of AC and/or DC power for reactor cooling, hence the reactor water level decreased and fuel was exposed. Water reacting with high temperature fuel metal covering resulted in hydrogen generation and hydrogen explosion of reactor buildings. This Accident caused radioactive release to the environment. In this chapter, an attempt has been made to understand in detail the mechanism of the Accident progression for Units 1–3 that were in operation by utilizing results of computer simulations. It should be noted that, due to limited information and capability of the state-of-the-art severe-Accident simulation tools, there are still unanswered questions, which should be tackled by academic research for improving and enhancing safety for the nuclear industry now and in the future.
