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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
Publisher: ASME
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

ARKADIA – for the Innovation of Advanced Nuclear Reactor Design

Hiroyuki Ohshima, Tai Asayama, Tomohiro Furukawa, Masaaki Tanaka, Takashi Takata, Yasuhiro Enuma
Proc. ASME. ICONE28, Volume 1: Operating Plant Challenges, Successes, and Lessons Learned; Nuclear Plant Engineering; Advanced Reactors and Fusion; Small Modular and Micro-Reactors Technologies and Applications, V001T03A007, August 4–6, 2021
Publisher: American Society of Mechanical Engineers
Paper No: ICONE28-64525
https://doi.org/10.1115/ICONE28-64525
View Paper titled, ARKADIA – for the Innovation of Advanced Nuclear Reactor Design
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Topics: Artificial intelligence, Computer simulation, Innovation, Nuclear design, Nuclear reactors, Optimization, Design, Safety, Carbon, Coolants
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
Publisher: American Society of Mechanical Engineers
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

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
Publisher: American Society of Mechanical Engineers
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
Journal Articles

Subchannel Analysis of Thermal-Hydraulics in a Fuel Assembly With Inner Duct Structure of a Sodium-Cooled Fast Reactor

Norihiro Kikuchi, Yasutomo Imai, Ryuji Yoshikawa, Norihiro Doda, Masaaki Tanaka, Hiroyuki Ohshima
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci. April 2019, 5(2): 021001.
Paper No: NERS-17-1280
https://doi.org/10.1115/1.4042191
Published Online: March 15, 2019
View Article titled, Subchannel Analysis of Thermal-Hydraulics in a Fuel Assembly With Inner Duct Structure of a Sodium-Cooled Fast Reactor
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Topics: Ducts, Flow (Dynamics), Fuels, Manufacturing, Sodium, Temperature distribution, Temperature, Sodium fast reactors, Wire, Thermal hydraulics
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
Publisher: American Society of Mechanical Engineers
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

Study on Gas Entrainment From Unstable Drifting Vortexes on Liquid Surface

Moe Hirakawa, Yuichiro Kikuchi, Takaaki Sakai, Masaaki Tanaka, Hiroyuki Ohshima
Proc. ASME. ICONE26, Volume 9: Student Paper Competition, V009T16A091, July 22–26, 2018
Publisher: American Society of Mechanical Engineers
Paper No: ICONE26-82477
https://doi.org/10.1115/ICONE26-82477
View Paper titled, Study on Gas Entrainment From Unstable Drifting Vortexes on Liquid Surface
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Topics: Vortices, Flow (Dynamics), Computational fluid dynamics, Water, Reactor vessels, Sodium fast reactors, Coolants, Design, Design methodology, Evaluation methods
Proceedings Papers

Thermal-Hydraulic Analysis of Fuel Assembly With Inner Duct Structure of an Advanced Loop-Type Sodium-Cooled Fast Reactor Using ASFRE Code

Norihiro Kikuchi, Yasutomo Imai, Ryuji Yoshikawa, Norihiro Doda, Masaaki Tanaka, Hiroyuki Ohshima
Proc. ASME. ICONE25, Volume 8: Computational Fluid Dynamics (CFD) and Coupled Codes; Nuclear Education, Public Acceptance and Related Issues, V008T09A054, July 2–6, 2017
Publisher: American Society of Mechanical Engineers
Paper No: ICONE25-67870
https://doi.org/10.1115/ICONE25-67870
View Paper titled, Thermal-Hydraulic Analysis of Fuel Assembly With Inner Duct Structure of an Advanced Loop-Type Sodium-Cooled Fast Reactor Using ASFRE Code
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Topics: Ducts, Fuels, Manufacturing, Sodium fast reactors, Pins (Engineering), Flow (Dynamics), Temperature distribution, Design, Thermal hydraulics, Turbulence
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
Publisher: American Society of Mechanical Engineers
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

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
Publisher: American Society of Mechanical Engineers
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

Structure and Erosion Characteristics of Underexpanded Inert-Gas Jets Impinging on a Single Cylinder Submerged in Liquid Sodium

Hideyuki Kudoh, Ken-ichiro Sugiyama, Tadashi Narabayashi, Hiroyuki Ohshima, Akikazu Kurihara
Proc. ASME. ICONE21, Volume 2: Plant Systems, Construction, Structures and Components; Next Generation Reactors and Advanced Reactors, V002T05A033, July 29–August 2, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICONE21-16068
https://doi.org/10.1115/ICONE21-16068
View Paper titled, Structure and Erosion Characteristics of Underexpanded Inert-Gas Jets Impinging on a Single Cylinder Submerged in Liquid Sodium
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Topics: Cylinders, Erosion, Jets, Sodium, Drops, Flow (Dynamics), Visualization, Heat transfer, Steam, Boilers
Proceedings Papers

Kinetic Study of Sodium-Water Reaction Phenomena by Differential Thermal Analysis

Shin Kikuchi, Hiroshi Seino, Akikazu Kurihara, Hiroyuki Ohshima
Proc. ASME. ICONE20-POWER2012, Volume 2: Plant Systems, Structures, and Components; Safety and Security; Next Generation Systems; Heat Exchangers and Cooling Systems, 281-289, July 30–August 3, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICONE20-POWER2012-54134
https://doi.org/10.1115/ICONE20-POWER2012-54134
View Paper titled, Kinetic Study of Sodium-Water Reaction Phenomena by Differential Thermal Analysis
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Topics: Sodium, Thermal analysis, Water, Sodium fast reactors, Temperature, Heat transfer, Safety, Boilers, Chemical kinetics, Chemical reactions
Proceedings Papers

Visualization on Inert Gas Jets Impinging to a Glass Tube Submerged in Liquid Sodium

Hideyuki Kudoh, Ken-ichiro Sugiyama, Tadashi Narabayashi, Hiroyuki Ohshima, Akikazu Kurihara
Proc. ASME. ICONE20-POWER2012, Volume 5: Fusion Engineering; Student Paper Competition; Design Basis and Beyond Design Basis Events; Simple and Combined Cycles, 145-150, July 30–August 3, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICONE20-POWER2012-54396
https://doi.org/10.1115/ICONE20-POWER2012-54396
View Paper titled, Visualization on Inert Gas Jets Impinging to a Glass Tube Submerged in Liquid Sodium
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Topics: Glass, Jets, Sodium, Visualization, Drops, Nozzles, Water, Accidents, Cavities, Liquid films
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
Publisher: American Society of Mechanical Engineers
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

Investigation on Velocity Distribution Around the Wrapping Wire in an Inner Subchannel of Fuel Pin Bundle

Masahiro Nishimura, Hiroyuki Sato, Hideki Kamide, Hiroyuki Ohshima, Kazuyoshi Nagasawa, Yasutomo Imai
Proc. ASME. ICONE20-POWER2012, Volume 3: Thermal-Hydraulics; Turbines, Generators, and Auxiliaries, 299-308, July 30–August 3, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICONE20-POWER2012-54404
https://doi.org/10.1115/ICONE20-POWER2012-54404
View Paper titled, Investigation on Velocity Distribution Around the Wrapping Wire in an Inner Subchannel of Fuel Pin Bundle
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Topics: Fuels, Wire
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
Publisher: American Society of Mechanical Engineers
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 Simulations of Thermal-Mixing in T-Junction Piping System Using Large Eddy Simulation Approach

Masaaki Tanaka, Satoshi Murakami, Yasuhiro Miyake, Hiroyuki Ohshima
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3641-3652, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-18009
https://doi.org/10.1115/AJK2011-18009
View Paper titled, Numerical Simulations of Thermal-Mixing in T-Junction Piping System Using Large Eddy Simulation Approach
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Topics: Computer simulation, Junctions, Large eddy simulation, Piping systems, Pipes, Temperature, Cycles, Eddies (Fluid dynamics), Fatigue, Fluids
Proceedings Papers

Study on Gas Entrainment Rate Into Liquid From Free Surface by Vortex

Yasuo Koizumi, Kei Ito, Hiroyuki Ohshima, Hiroyasu Ohtake
Proc. ASME. IMECE2010, Volume 7: Fluid Flow, Heat Transfer and Thermal Systems, Parts A and B, 837-842, November 12–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2010-39587
https://doi.org/10.1115/IMECE2010-39587
View Paper titled, Study on Gas Entrainment Rate Into Liquid From Free Surface by Vortex
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Topics: Vortices, Vessels, Bubbles, Water, Flow (Dynamics), Bubbly flow, Pipes, Video cameras
Proceedings Papers

Study on Pipe Wastage Mechanism by Liquid Droplet Impingement Erosion II (Measurement of Erosion Rate)

William Khoo Chong Weng, Yuma Higashi, Tadashi Narabayashi, Kenichiro Sugiyama, Hiroyuki Ohshima, Akikazu Kurihara
Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 4, Parts A and B, 865-872, May 17–21, 2010
Publisher: American Society of Mechanical Engineers
Paper No: ICONE18-29887
https://doi.org/10.1115/ICONE18-29887
View Paper titled, Study on Pipe Wastage Mechanism by Liquid Droplet Impingement Erosion II (Measurement of Erosion Rate)
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Topics: Drops, Erosion, Pipes, Rotating disks, Water, Boiling water reactors, Corrosion, Density, Flow (Dynamics), Microscopes
Proceedings Papers

Sodium-Water Reaction Elucidation With Counter-Flow Diffusion Flame Experiment and Its Numerical Simulation

Akira Yamaguchi, Takashi Takata, Hiroyuki Ohshima, Joji Sogabe, Yoshihiro Deguchi, Shin Kikuchi
Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 4, Parts A and B, 1185-1192, May 17–21, 2010
Publisher: American Society of Mechanical Engineers
Paper No: ICONE18-30217
https://doi.org/10.1115/ICONE18-30217
View Paper titled, Sodium-Water Reaction Elucidation With Counter-Flow Diffusion Flame Experiment and Its Numerical Simulation
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Topics: Computer simulation, Diffusion flames, Flow (Dynamics), Sodium, Water, Accidents, Heat, Sodium fast reactors, Boilers, Chemical reactions