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Akihiro Uchibori
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Proceedings Papers

Experiment Study on the Effect of Nozzle Shape on Liquid Jet Breakup

Guofu Sun, Yi Zhan, Tomio Okawa, Mitsuhiro Aoyagi, Akihiro Uchibori, Yasushi Okano
Proc. ASME. ICONE29, Volume 7B: Thermal-Hydraulics and Safety Analysis, V07BT07A032, August 8–12, 2022
Paper No: ICONE29-93074
https://doi.org/10.1115/ICONE29-93074
View Paper titled, Experiment Study on the Effect of Nozzle Shape on Liquid Jet Breakup
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Topics: Flow (Dynamics), Nozzles, Shapes
Journal Articles

ARKADIA—For the Innovation of Advanced Nuclear Reactor Design

Hiroyuki Ohshima, Tai Asayama, Tomohiro Furukawa, Masaaki Tanaka, Akihiro Uchibori, Takashi Takata, Akiyuki Seki, Yasuhiro Enuma
Journal: Journal of Nuclear Engineering and Radiation Science
Article Type: Design Innovation Paper
ASME J of Nuclear Rad Sci. April 2023, 9(2): 025001.
Paper No: NERS-21-1157
https://doi.org/10.1115/1.4054726
Published Online: June 15, 2022
View Article titled, ARKADIA—For the Innovation of Advanced Nuclear Reactor Design
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Topics: Design, Optimization, Safety, Thermal hydraulics, Nuclear design, Nuclear reactors, Computer simulation
Proceedings Papers

Numerical Evaluation of Sodium-Water Reaction Based on Engineering Approach With Particle Method

Wataru Kosaka, Akihiro Uchibori, Hideki Yanagisawa, Takashi Takata, Sunghyon Jang
Proc. ASME. ICONE28, Volume 2: Nuclear Fuels, Research, and Fuel Cycle; Nuclear Codes and Standards; Thermal-Hydraulics, V002T07A002, August 4–6, 2021
Paper No: ICONE28-61345
https://doi.org/10.1115/ICONE28-61345
View Paper titled, Numerical Evaluation of Sodium-Water Reaction Based on Engineering Approach With Particle Method
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Topics: Boilers, Particulate matter, Sodium, Sodium fast reactors, Water
Proceedings Papers

Study of Recent Sodium Pool Fire Model Improvements for MELCOR Code

Mitsuhiro Aoyagi, David L. Y. Louie, Akihiro Uchibori, Takashi Takata, David Luxat
Proc. ASME. ICONE28, Volume 3: Computational Fluid Dynamics (CFD); Verification and Validation; Advanced Methods of Manufacturing (AMM) for Nuclear Reactors and Components; Decontamination, Decommissioning, and Radioactive Waste Management; Beyond Design Basis and Nuclear Safety; Risk Informed Management and Regulation, V003T13A005, August 4–6, 2021
Paper No: ICONE28-64509
https://doi.org/10.1115/ICONE28-64509
View Paper titled, Study of Recent Sodium Pool Fire Model Improvements for MELCOR Code
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Topics: Fire, Liquid pool fires, Sodium, Sodium fast reactors
Proceedings Papers

Development of Ex-Vessel Phenomena Analysis Model for Multi-Scenario Simulation System, SPECTRA

Akihiro Uchibori, Mitsuhiro Aoyagi, Takashi Takata, Hiroyuki Ohshima
Proc. ASME. ICONE2020, Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation, V003T13A048, August 4–5, 2020
Paper No: ICONE2020-16818
https://doi.org/10.1115/ICONE2020-16818
View Paper titled, Development of Ex-Vessel Phenomena Analysis Model for Multi-Scenario Simulation System, SPECTRA
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Topics: Accidents, Simulation, Sodium fast reactors, Spectra (Spectroscopy), Vessels
Proceedings Papers

Numerical Validation of AQUA-SF in SNL T3 Sodium Spray Fire Experiment

Masateru Sonehara, Mitsuhiro Aoyagi, Akihiro Uchibori, Takashi Takata, Hiroyuki Ohshima, Andrew J. Clark, David Louie
Proc. ASME. ICONE2020, Volume 1: Beyond Design Basis; Codes and Standards; Computational Fluid Dynamics (CFD); Decontamination and Decommissioning; Nuclear Fuel and Engineering; Nuclear Plant Engineering, V001T03A024, August 4–5, 2020
Paper No: ICONE2020-16851
https://doi.org/10.1115/ICONE2020-16851
View Paper titled, Numerical Validation of AQUA-SF in SNL T3 Sodium Spray Fire Experiment
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Topics: Combustion, Fire, Sodium, Sprays
Proceedings Papers

Sodium Fire Analysis Using a Sodium Chemistry Package in MELCOR

Mitsuhiro Aoyagi, Akihiro Uchibori, Takahi Takata, David L. Y. Louie, Andrew J. Clark
Proc. ASME. ICONE2020, Volume 2: Nuclear Policy; Nuclear Safety, Security, and Cyber Security; Operating Plant Experience; Probabilistic Risk Assessments; SMR and Advanced Reactors, V002T11A016, August 4–5, 2020
Paper No: ICONE2020-16751
https://doi.org/10.1115/ICONE2020-16751
View Paper titled, Sodium Fire Analysis Using a Sodium Chemistry Package in MELCOR
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Topics: Chemistry, Fire, Liquid pool fires, Sodium
Proceedings Papers

Visualization Study on Droplet-Entrainment in a High-Speed Gas Jet Into a Liquid Pool

Taro Sugimoto, Shimpei Saito, Akiko Kaneko, Yutaka Abe, Akihiro Uchibori, Hiroyuki Ohshima
Proc. ASME. ICONE26, Volume 9: Student Paper Competition, V009T16A045, July 22–26, 2018
Paper No: ICONE26-81695
https://doi.org/10.1115/ICONE26-81695
View Paper titled, Visualization Study on Droplet-Entrainment in a High-Speed Gas Jet Into a Liquid Pool
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Topics: Drops, Visualization, Sodium, Flow (Dynamics), Steam, High pressure (Physics), Water, Liquid films, Shells, Sodium fast reactors
Proceedings Papers

Velocity of Entrainments Formed by High Velocity Air Jet Flow in Stagnant Water

Masaaki Akabane, Yasuo Koizumi, Akihiro Uchibori, Hideki Kamide, Hiroyuki Ohshima
Proc. ASME. ICONE22, Volume 5: Innovative Nuclear Power Plant Design and New Technology Application; Student Paper Competition, V005T17A051, July 7–11, 2014
Paper No: ICONE22-30806
https://doi.org/10.1115/ICONE22-30806
View Paper titled, Velocity of Entrainments Formed by High Velocity Air Jet Flow in Stagnant Water
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Topics: Air jets, Flow (Dynamics), Water, Vessels, Ear, Nozzles, Sodium, Boilers, Breeder reactors, Drops
Proceedings Papers

Entrainment Into High Speed Air Jet Blowing Out From a Hole to Stagnant Water

Yasuo Koizumi, Kohei Nago, Akihiro Uchibori, Hideki Kamide, Hiroyuku Ohshima
Proc. ASME. IMECE2013, Volume 8C: Heat Transfer and Thermal Engineering, V08CT09A036, November 15–21, 2013
Paper No: IMECE2013-65822
https://doi.org/10.1115/IMECE2013-65822
View Paper titled, Entrainment Into High Speed Air Jet Blowing Out From a Hole to Stagnant Water
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Topics: Air jets, Water, Pipes, Two-phase flow, Vessels, Drops, Ear, Flow (Dynamics), Atmospheric pressure, Flow visualization
Proceedings Papers

Multiphysics Analysis System for Tube Failure Accident in Steam Generator of Sodium-Cooled Fast Reactor

Akihiro Uchibori, Shin Kikuchi, Akikazu Kurihara, Hirotsugu Hamada, Hiroyuki Ohshima
Proc. ASME. ICONE21, Volume 3: Nuclear Safety and Security; Codes, Standards, Licensing and Regulatory Issues; Computational Fluid Dynamics and Coupled Codes, V003T10A045, July 29–August 2, 2013
Paper No: ICONE21-16692
https://doi.org/10.1115/ICONE21-16692
View Paper titled, Multiphysics Analysis System for Tube Failure Accident in Steam Generator of Sodium-Cooled Fast Reactor
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Topics: Accidents, Boilers, Failure, Sodium fast reactors, Computer simulation, Heat transfer, Chemical reactions, Sodium, Water, Computers
Proceedings Papers

Visualization of Entrainment and Surface Behavior of High Speed Air Jet Blowing Out From a Hole to Stagnant Water

Kohei Nago, Yasuo Koizumi, Akihiro Uchibori, Hiroyuki Ohshima
Proc. ASME. ICONE20-POWER2012, Volume 5: Fusion Engineering; Student Paper Competition; Design Basis and Beyond Design Basis Events; Simple and Combined Cycles, 529-534, July 30–August 3, 2012
Paper No: ICONE20-POWER2012-55068
https://doi.org/10.1115/ICONE20-POWER2012-55068
View Paper titled, Visualization of Entrainment and Surface Behavior of High Speed Air Jet Blowing Out From a Hole to Stagnant Water
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Topics: Air jets, Drops, Visualization, Water
Proceedings Papers

Numerical Methods for Compressible Multiphase Flow With Sodium-Water Chemical Reaction

Akihiro Uchibori, Hiroyuki Ohshima
Proc. ASME. ICONE20-POWER2012, Volume 4: Codes, Standards, Licensing, and Regulatory Issues; Fuel Cycle, Radioactive Waste Management and Decommissioning; Computational Fluid Dynamics (CFD) and Coupled Codes; Instrumentation and Controls; Fuels and Combustion, Materials Handling, Emissions; Advanced Energy Systems and Renewables (Wind, Solar, Geothermal); Performance Testing and Performance Test Codes, 447-456, July 30–August 3, 2012
Paper No: ICONE20-POWER2012-54437
https://doi.org/10.1115/ICONE20-POWER2012-54437
View Paper titled, Numerical Methods for Compressible Multiphase Flow With Sodium-Water Chemical Reaction
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Topics: Chemical reactions, Multiphase flow, Numerical analysis, Sodium, Water, Drops, Boilers, Accidents, Computer simulation, Computer software
Proceedings Papers

Numerical Study on Passive Control of Thermal Striping Phenomenon Using Lorentz Force in Fast Reactor

Takashi Takata, Takeshi Fukuda, Akira Yamaguchi, Akihiro Uchibori, Nobuyuki Kimura, Hideki Kamide
Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 4, Parts A and B, 1125-1131, May 17–21, 2010
Paper No: ICONE18-30188
https://doi.org/10.1115/ICONE18-30188
View Paper titled, Numerical Study on Passive Control of Thermal Striping Phenomenon Using Lorentz Force in Fast Reactor
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Topics: Fast neutron reactors, Passive control, Fatigue, Flow (Dynamics), Magnetic fields, Sodium, Turbulence, Fluids, Junctions, Temperature
Proceedings Papers

Numerical Prediction of Cooling Capability in Hemispherical Gap Flow Passage for In-Vessel Core Retention

Akihiro Uchibori, Kenji Fukuda, Koji Morita, Tatsuya Matsumoto
Proc. ASME. ICONE10, 10th International Conference on Nuclear Engineering, Volume 3, 525-532, April 14–18, 2002
Paper No: ICONE10-22334
https://doi.org/10.1115/ICONE10-22334
View Paper titled, Numerical Prediction of Cooling Capability in Hemispherical Gap Flow Passage for In-Vessel Core Retention
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Topics: Cooling, Flow (Dynamics), Vessels, Numerical analysis, Porosity, Two-phase flow, Critical heat flux, Heat flux, Reactor vessels
Proceedings Papers

Applicability of Modified Drift Flux Model for Bubbly Flow in 2-D/3-D Rectangular Box With Various Kinds of Obstacles

Tatsuya Matsumoto, Akihiro Uchibori, Ryo Akasaka, Toshinori Seki, Shyuji Kaminishi, Koji Morita, Kenji Fukuda
Proc. ASME. ICONE10, 10th International Conference on Nuclear Engineering, Volume 3, 375-382, April 14–18, 2002
Paper No: ICONE10-22245
https://doi.org/10.1115/ICONE10-22245
View Paper titled, Applicability of Modified Drift Flux Model for Bubbly Flow in 2-D/3-D Rectangular Box With Various Kinds of Obstacles
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Topics: Bubbly flow, Computer simulation, Flow (Dynamics), Flowmeters, Fuels, Geometry, Nitrogen, Plates (structures), Resins, Two-phase flow