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Fumio Hamasaki - One of the best experts on this subject based on the ideXlab platform.
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safety assessment of nuclear power plant under Volcanic Phenomena part2 revision of jeag4625 on the safety assessment of severe accident measures equipment and maintenance programme
Journal of Nuclear Science and Technology, 2017Co-Authors: Takao Nakamura, Setsuya Nakada, Kichisa Iwata, Fumio HamasakiAbstract:ABSTRACTJapan is one of the countries with abundant active volcanoes. In the field of Nuclear Energy, it is necessary to assess safety against Volcanic hazards, and voluntary guidelines were published in JEAG4625 in 2009 to set up the requirements of site assessments and the basic designs of nuclear power plants (NPPs). Revised guidelines were published in 2014, which stated the need to examine Volcanic Phenomena and concrete countermeasures in the detailed designs of NPPs. A further revision included the requirement of the safety assessment of equipment used for measures in a severe accident. This paper focuses on the background and technical basis of the revision of the voluntary guidelines and shows the basic policy on the concept of defence in depth for protecting NPPs against Volcanic Phenomena and the requirements of equipment to perform measures in the case of a severe accident to prevent nuclear hazards due to Volcanic Phenomena and the maintenance programme after a Volcanic eruption.
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safety assessment of nuclear power plant under Volcanic Phenomena background and technical basis of the revision of jeag4625
Journal of Nuclear Science and Technology, 2016Co-Authors: Takao Nakamura, Setsuya Nakada, Kichisa Iwata, Fumio HamasakiAbstract:Japan is one of the countries with abundant active volcanoes and has a long history of developing countermeasures to mitigate Volcanic disasters. In the field of nuclear energy, it is also necessary to assess safety against Volcanic hazards, and in 2009, a voluntary guideline was published as JEAG4625 in order to set up requirements of site assessments and basic designs of nuclear power plants (NPPs). This guideline has been revised to satisfy the requirements for examining the necessity of considering Volcanic Phenomena and concrete countermeasures in detailed designs of NPPs. This paper focuses on the background and technical basis of this voluntary guideline and shows the basic policy to ensure safety of NPPs and the requirements to prevent nuclear hazards due to Volcanic Phenomena based on the defense in depth concept.
Takao Nakamura - One of the best experts on this subject based on the ideXlab platform.
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safety assessment of nuclear power plant under Volcanic Phenomena part2 revision of jeag4625 on the safety assessment of severe accident measures equipment and maintenance programme
Journal of Nuclear Science and Technology, 2017Co-Authors: Takao Nakamura, Setsuya Nakada, Kichisa Iwata, Fumio HamasakiAbstract:ABSTRACTJapan is one of the countries with abundant active volcanoes. In the field of Nuclear Energy, it is necessary to assess safety against Volcanic hazards, and voluntary guidelines were published in JEAG4625 in 2009 to set up the requirements of site assessments and the basic designs of nuclear power plants (NPPs). Revised guidelines were published in 2014, which stated the need to examine Volcanic Phenomena and concrete countermeasures in the detailed designs of NPPs. A further revision included the requirement of the safety assessment of equipment used for measures in a severe accident. This paper focuses on the background and technical basis of the revision of the voluntary guidelines and shows the basic policy on the concept of defence in depth for protecting NPPs against Volcanic Phenomena and the requirements of equipment to perform measures in the case of a severe accident to prevent nuclear hazards due to Volcanic Phenomena and the maintenance programme after a Volcanic eruption.
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safety assessment of nuclear power plant under Volcanic Phenomena background and technical basis of the revision of jeag4625
Journal of Nuclear Science and Technology, 2016Co-Authors: Takao Nakamura, Setsuya Nakada, Kichisa Iwata, Fumio HamasakiAbstract:Japan is one of the countries with abundant active volcanoes and has a long history of developing countermeasures to mitigate Volcanic disasters. In the field of nuclear energy, it is also necessary to assess safety against Volcanic hazards, and in 2009, a voluntary guideline was published as JEAG4625 in order to set up requirements of site assessments and basic designs of nuclear power plants (NPPs). This guideline has been revised to satisfy the requirements for examining the necessity of considering Volcanic Phenomena and concrete countermeasures in detailed designs of NPPs. This paper focuses on the background and technical basis of this voluntary guideline and shows the basic policy to ensure safety of NPPs and the requirements to prevent nuclear hazards due to Volcanic Phenomena based on the defense in depth concept.
Kichisa Iwata - One of the best experts on this subject based on the ideXlab platform.
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safety assessment of nuclear power plant under Volcanic Phenomena part2 revision of jeag4625 on the safety assessment of severe accident measures equipment and maintenance programme
Journal of Nuclear Science and Technology, 2017Co-Authors: Takao Nakamura, Setsuya Nakada, Kichisa Iwata, Fumio HamasakiAbstract:ABSTRACTJapan is one of the countries with abundant active volcanoes. In the field of Nuclear Energy, it is necessary to assess safety against Volcanic hazards, and voluntary guidelines were published in JEAG4625 in 2009 to set up the requirements of site assessments and the basic designs of nuclear power plants (NPPs). Revised guidelines were published in 2014, which stated the need to examine Volcanic Phenomena and concrete countermeasures in the detailed designs of NPPs. A further revision included the requirement of the safety assessment of equipment used for measures in a severe accident. This paper focuses on the background and technical basis of the revision of the voluntary guidelines and shows the basic policy on the concept of defence in depth for protecting NPPs against Volcanic Phenomena and the requirements of equipment to perform measures in the case of a severe accident to prevent nuclear hazards due to Volcanic Phenomena and the maintenance programme after a Volcanic eruption.
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safety assessment of nuclear power plant under Volcanic Phenomena background and technical basis of the revision of jeag4625
Journal of Nuclear Science and Technology, 2016Co-Authors: Takao Nakamura, Setsuya Nakada, Kichisa Iwata, Fumio HamasakiAbstract:Japan is one of the countries with abundant active volcanoes and has a long history of developing countermeasures to mitigate Volcanic disasters. In the field of nuclear energy, it is also necessary to assess safety against Volcanic hazards, and in 2009, a voluntary guideline was published as JEAG4625 in order to set up requirements of site assessments and basic designs of nuclear power plants (NPPs). This guideline has been revised to satisfy the requirements for examining the necessity of considering Volcanic Phenomena and concrete countermeasures in detailed designs of NPPs. This paper focuses on the background and technical basis of this voluntary guideline and shows the basic policy to ensure safety of NPPs and the requirements to prevent nuclear hazards due to Volcanic Phenomena based on the defense in depth concept.
Setsuya Nakada - One of the best experts on this subject based on the ideXlab platform.
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safety assessment of nuclear power plant under Volcanic Phenomena part2 revision of jeag4625 on the safety assessment of severe accident measures equipment and maintenance programme
Journal of Nuclear Science and Technology, 2017Co-Authors: Takao Nakamura, Setsuya Nakada, Kichisa Iwata, Fumio HamasakiAbstract:ABSTRACTJapan is one of the countries with abundant active volcanoes. In the field of Nuclear Energy, it is necessary to assess safety against Volcanic hazards, and voluntary guidelines were published in JEAG4625 in 2009 to set up the requirements of site assessments and the basic designs of nuclear power plants (NPPs). Revised guidelines were published in 2014, which stated the need to examine Volcanic Phenomena and concrete countermeasures in the detailed designs of NPPs. A further revision included the requirement of the safety assessment of equipment used for measures in a severe accident. This paper focuses on the background and technical basis of the revision of the voluntary guidelines and shows the basic policy on the concept of defence in depth for protecting NPPs against Volcanic Phenomena and the requirements of equipment to perform measures in the case of a severe accident to prevent nuclear hazards due to Volcanic Phenomena and the maintenance programme after a Volcanic eruption.
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safety assessment of nuclear power plant under Volcanic Phenomena background and technical basis of the revision of jeag4625
Journal of Nuclear Science and Technology, 2016Co-Authors: Takao Nakamura, Setsuya Nakada, Kichisa Iwata, Fumio HamasakiAbstract:Japan is one of the countries with abundant active volcanoes and has a long history of developing countermeasures to mitigate Volcanic disasters. In the field of nuclear energy, it is also necessary to assess safety against Volcanic hazards, and in 2009, a voluntary guideline was published as JEAG4625 in order to set up requirements of site assessments and basic designs of nuclear power plants (NPPs). This guideline has been revised to satisfy the requirements for examining the necessity of considering Volcanic Phenomena and concrete countermeasures in detailed designs of NPPs. This paper focuses on the background and technical basis of this voluntary guideline and shows the basic policy to ensure safety of NPPs and the requirements to prevent nuclear hazards due to Volcanic Phenomena based on the defense in depth concept.
Arnau Folch - One of the best experts on this subject based on the ideXlab platform.
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long range hazard assessment of Volcanic ash dispersal for a plinian eruptive scenario at popocatepetl volcano mexico implications for civil aviation safety
Bulletin of Volcanology, 2014Co-Authors: Rosanna Bonasia, Lucia Capra, Claus Siebe, Chirara Scaini, Manuel Nathenson, Lilia Aranasalinas, Arnau FolchAbstract:Popocatepetl is one of Mexico’s most active volcanoes threatening a densely populated area that includes Mexico City with more than 20 million inhabitants. The destructive potential of this volcano is demonstrated by its Late Pleistocene–Holocene eruptive activity, which has been characterized by recurrent Plinian eruptions of large magnitude, the last two of which destroyed human settlements in pre-Hispanic times. Popocatepetl’s reawakening in 1994 produced a crisis that culminated with the evacuation of two villages on the northeastern flank of the volcano. Shortly after, a monitoring system and a civil protection contingency plan based on a hazard zone map were implemented. The current Volcanic hazards map considers the potential occurrence of different Volcanic Phenomena, including pyroclastic density currents and lahars. However, no quantitative assessment of the tephra hazard, especially related to atmospheric dispersal, has been performed. The presence of airborne Volcanic ash at low and jet-cruise atmospheric levels compromises the safety of aircraft operations and forces re-routing of aircraft to prevent encounters with Volcanic ash clouds. Given the high number of important airports in the surroundings of Popocatepetl volcano and considering the potential threat posed to civil aviation in Mexico and adjacent regions in case of a Plinian eruption, a hazard assessment for tephra dispersal is required. In this work, we present the first probabilistic tephra dispersal hazard assessment for Popocatepetl volcano. We compute probabilistic hazard maps for critical thresholds of airborne ash concentrations at different flight levels, corresponding to the situation defined in Europe during 2010, and still under discussion. Tephra dispersal mode is performed using the FALL3D numerical model. Probabilistic hazard maps are built for a Plinian eruptive scenario defined on the basis of geological field data for the “Ochre Pumice” Plinian eruption (4965 14C yr BP). FALL3D model input eruptive parameters are constrained through an inversion method carried out with the semi-analytical HAZMAP model and are varied by sampling them using probability density functions. We analyze the influence of seasonal variations on ash dispersal and estimate the average persistence of critical ash concentrations at relevant locations and airports. This study assesses the impact that a Plinian eruption similar to the Ochre Pumice eruption would have on the main airports of Mexico and adjacent areas. The hazard maps presented here can support long-term planning that would help minimize the impacts of such an eruption on civil aviation.
