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Akinori Tamura
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Journal Articles

An estimation method for bias error of measurements by utilizing process data, an incidence matrix and a reference instrument for data validation and reconciliation: Part 2 Extension to the energy balance relation

Accepted Manuscript
Akinori Tamura, Yuki Hidaka, Haruhiko Ikeda, Norikazu Hamaura
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci.
Paper No: NERS-24-1037
https://doi.org/10.1115/1.4066344
Published Online: August 26, 2024
View Article titled, An estimation method for bias error of measurements by utilizing process data, an incidence matrix and a reference instrument for data validation and reconciliation: Part 2 Extension to the energy balance relation
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Topics: Energy budget (Physics), Errors, Instrumentation, Measurement uncertainty, Flow (Dynamics), Reliability, Digital twin, Energy conservation, Feedwater, Internet of things
Journal Articles

An Estimation Method for Bias Error of Measurements by Utilizing Process Data, An Incidence Matrix and a Reference Instrument for Data Validation and Reconciliation

Akinori Tamura, Yuki Hidaka, Haruhiko Ikeda, Norikazu Hamaura
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci. October 2023, 9(4): 041802.
Paper No: NERS-23-1050
https://doi.org/10.1115/1.4062865
Published Online: September 15, 2023
View Article titled, An Estimation Method for Bias Error of Measurements by Utilizing Process Data, An Incidence Matrix and a Reference Instrument for Data Validation and Reconciliation
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Topics: Errors, Flow (Dynamics), Instrumentation, Measurement uncertainty, Uncertainty, Nuclear power stations, Sensors, Pipes
Journal Articles

Investigation Into Hybridization of the Two-Fluid Model and Phase-Field Model for Multi-Scale Two-Phase Flow Simulations

Akinori Tamura, Kenichi Katono
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci. July 2023, 9(3): 031404.
Paper No: NERS-22-1052
https://doi.org/10.1115/1.4055932
Published Online: February 8, 2023
View Article titled, Investigation Into Hybridization of the Two-Fluid Model and Phase-Field Model for Multi-Scale Two-Phase Flow Simulations
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Topics: Bubbles, Bubbly flow, Fluids, Pressure, Simulation, Plumes (Fluid dynamics), Porosity, Surface tension, Flow (Dynamics), Two-phase flow
Journal Articles

Development of a Phase-Field Method for Phase Change Simulations Using a Conservative Allen–Cahn Equation

Akinori Tamura, Kenichi Katono
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci. July 2022, 8(3): 031402.
Paper No: NERS-21-1068
https://doi.org/10.1115/1.4052807
Published Online: May 26, 2022
View Article titled, Development of a Phase-Field Method for Phase Change Simulations Using a Conservative Allen–Cahn Equation
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Topics: Boundary-value problems, Simulation, Wetting, Vapors, Bubbles, Simulation results
Journal Articles

Development of a Phase-Field Method for Phase Change Simulations Using a Conservative Allen–Cahn Equation

Akinori Tamura, Kenichi Katono
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci. April 2022, 8(2): 021401.
Paper No: NERS-20-1182
https://doi.org/10.1115/1.4050209
Published Online: October 19, 2021
View Article titled, Development of a Phase-Field Method for Phase Change Simulations Using a Conservative Allen–Cahn Equation
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Topics: Boundary-value problems, Simulation, Wetting, Vapors, Bubbles, Simulation results
Proceedings Papers

A Non-Contact Ultrasonic Sensor for General Corrosion Inspection of Thin Plates

Akinori Tamura, Masahiro Miki, Naoyuki Kono, Hiroshi Okazawa, Shinobu Okido, Chenghuan Zhong, Erik Fabre, Anthony J. Croxford, Paul D. Wilcox
Proc. ASME. ICONE26, Volume 1: Operations and Maintenance, Engineering, Modifications, Life Extension, Life Cycle, and Balance of Plant; Instrumentation and Control (I&C) and Influence of Human Factors; Innovative Nuclear Power Plant Design and SMRs, V001T01A018, July 22–26, 2018
Publisher: American Society of Mechanical Engineers
Paper No: ICONE26-82560
https://doi.org/10.1115/ICONE26-82560
View Paper titled, A Non-Contact Ultrasonic Sensor for General Corrosion Inspection of Thin Plates
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Topics: Corrosion, Inspection, Plates (structures), Ultrasonic transducers, Sensors, Engineering prototypes, Computer simulation, Air conditioning, Computer software, Ducts
Journal Articles

A Numerical Analysis Method of Impurity Precipitation on Mesh Wire of Cold Trap in Fast Breeder Reactor

Akinori Tamura, Shiro Takahashi, Hiroyuki Nakata, Akio Takota
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci. July 2018, 4(3): 031015.
Paper No: NERS-17-1262
https://doi.org/10.1115/1.4039037
Published Online: May 16, 2018
View Article titled, A Numerical Analysis Method of Impurity Precipitation on Mesh Wire of Cold Trap in Fast Breeder Reactor
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Topics: Flow (Dynamics), Numerical analysis, Precipitation, Reynolds number, Simulation, Wire, Breeder reactors, Computer simulation, Pressure, Sodium
Proceedings Papers

Development of Evaluation Method for Cold Trap in Fast Breeder Reactor: Part 2 — Analytical Evaluation of Impurity Capturing Capacity in Cold Trap

Shiro Takahashi, Akinori Tamura, Hiroyuki Nakata, Akio Takota
Proc. ASME. ICONE25, Volume 6: Thermal-Hydraulics, V006T08A109, July 2–6, 2017
Publisher: American Society of Mechanical Engineers
Paper No: ICONE25-67699
https://doi.org/10.1115/ICONE25-67699
View Paper titled, Development of Evaluation Method for Cold Trap in Fast Breeder Reactor: Part 2 — Analytical Evaluation of Impurity Capturing Capacity in Cold Trap
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Topics: Breeder reactors, Evaluation methods, Hydrogen, Sodium, Computational fluid dynamics, Oxygen, Sodium compounds, Wire, Packing (Shipments), Packings (Cushioning)
Proceedings Papers

Development of Evaluation Method for Cold Trap in Fast Breeder Reactor: Part 1 — Numerical Analysis of Impurity Precipitation on Mesh Wire

Akinori Tamura, Shiro Takahashi, Hiroyuki Nakata, Akio Takota
Proc. ASME. ICONE25, Volume 6: Thermal-Hydraulics, V006T08A110, July 2–6, 2017
Publisher: American Society of Mechanical Engineers
Paper No: ICONE25-67702
https://doi.org/10.1115/ICONE25-67702
View Paper titled, Development of Evaluation Method for Cold Trap in Fast Breeder Reactor: Part 1 — Numerical Analysis of Impurity Precipitation on Mesh Wire
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Topics: Breeder reactors, Evaluation methods, Numerical analysis, Precipitation, Wire, Sodium, Sodium compounds, Lattice Boltzmann methods, Reynolds number, Hydrogen
Journal Articles

A Feasibility Study of Noncontact Ultrasonic Sensor for Nuclear Power Plant Inspection

Akinori Tamura, Chenghuan Zhong, Anthony J. Croxford, Paul D. Wilcox
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci. April 2017, 3(2): 021003.
Paper No: NERS-16-1062
https://doi.org/10.1115/1.4035466
Published Online: March 1, 2017
View Article titled, A Feasibility Study of Noncontact Ultrasonic Sensor for Nuclear Power Plant Inspection
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Topics: Inspection, Nuclear power stations, Separation (Technology), Thickness measurement, Ultrasonic transducers, Transducers, Pipes, Radiation (Physics), Signals
Proceedings Papers

Development of Inherently Safe Technologies for Large Scale BWRs: (3) Infinite-Time Air-Cooling System

Akinori Tamura, Toshinori Kawamura, Naoyuki Ishida, Kazuaki Kitou
Proc. ASME. ICONE22, Volume 3: Next Generation Reactors and Advanced Reactors; Nuclear Safety and Security, V003T06A042, July 7–11, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ICONE22-30989
https://doi.org/10.1115/ICONE22-30989
View Paper titled, Development of Inherently Safe Technologies for Large Scale BWRs: (3) Infinite-Time Air-Cooling System
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Topics: Boiling water reactors, Cooling, Heat transfer, Heat, Heat exchangers, Thermocouples, Air compressors, Air flow, Containment vessels, Density
Proceedings Papers

Development of Inherently Safe Technologies for Large Scale BWRs: (1) Plant System

Kazuaki Kitou, Naoyuki Ishida, Akinori Tamura, Ryou Ishibashi, Masaki Kanada, Mamoru Kamoshida
Proc. ASME. ICONE22, Volume 3: Next Generation Reactors and Advanced Reactors; Nuclear Safety and Security, V003T06A046, July 7–11, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ICONE22-31080
https://doi.org/10.1115/ICONE22-31080
View Paper titled, Development of Inherently Safe Technologies for Large Scale BWRs: (1) Plant System
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Topics: Boiling water reactors, Cooling, Hydrogen, Cladding systems (Building), Accidents, Heat, Water, Explosions, Fuels, Fukushima nuclear disaster, Japan, 2011
Journal Articles

Development of Boiling Water Reactor Steam Dryer Loading Evaluation Methods Through Scale Model Tests Under Actual Steam Conditions

Shiro Takahashi, Keita Okuyama, Akinori Tamura, Yasuhiro Mabuchi, Teppei Kubota, Kazuhiro Yoshikawa
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. October 2014, 136(5): 051307.
Paper No: PVT-13-1151
https://doi.org/10.1115/1.4026580
Published Online: August 19, 2014
View Article titled, Development of Boiling Water Reactor Steam Dryer Loading Evaluation Methods Through Scale Model Tests Under Actual Steam Conditions
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Topics: Acoustics, Boiling water reactors, Flow (Dynamics), Pipes, Pressure, Resonance, Steam, Fluids
Proceedings Papers

Development of BWR Steam Dryer Loading Evaluation Methods Through Scale Model Tests Under Actual Steam Conditions

Shiro Takahashi, Keita Okuyama, Akinori Tamura, Yasuhiro Mabuchi, Teppei Kubota, Kazuhiro Yoshikawa
Proc. ASME. PVP2013, Volume 4: Fluid-Structure Interaction, V004T04A046, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97564
https://doi.org/10.1115/PVP2013-97564
View Paper titled, Development of BWR Steam Dryer Loading Evaluation Methods Through Scale Model Tests Under Actual Steam Conditions
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Topics: Boiling water reactors, Evaluation methods, Steam, Pressure, Pipes, Resonance, Acoustics, Flow (Dynamics), Fluids, Vortices
Proceedings Papers

Fluctuating Pressure Generating in BWR Main Steam Lines Acoustic Excited by Safety Relief Valve Stub Pipes and Dead Legs

Shiro Takahashi, Keita Okuyama, Akinori Tamura, Masaya Ohtsuka, Masaaki Tsubaki, Mabuchi Yasuhiro, Teppei Kubota, Yukio Ogawa, Fumio Inada, Ryo Morita
Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 5, 469-478, May 17–21, 2010
Publisher: American Society of Mechanical Engineers
Paper No: ICONE18-29361
https://doi.org/10.1115/ICONE18-29361
View Paper titled, Fluctuating Pressure Generating in BWR Main Steam Lines Acoustic Excited by Safety Relief Valve Stub Pipes and Dead Legs
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Topics: Acoustics, Boiling water reactors, Pipes, Pressure, Relief valves, Safety, Steam, Resonance, Flow (Dynamics), Finite element methods
Proceedings Papers

Flow Visualization of Acoustic Resonance for Safety Relief Valves in Power Uprated BWRs

Keita Okuyama, Shiro Takahashi, Akinori Tamura, Koji Nishida, Masaya Ohtsuka, Masaaki Tsubaki
Proc. ASME. ICONE17, Volume 3: Thermal Hydraulics; Current Advanced Reactors: Plant Design, Construction, Workforce and Public Acceptance, 11-18, July 12–16, 2009
Publisher: American Society of Mechanical Engineers
Paper No: ICONE17-75035
https://doi.org/10.1115/ICONE17-75035
View Paper titled, Flow Visualization of Acoustic Resonance for Safety Relief Valves in Power Uprated BWRs
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Topics: Acoustics, Boiling water reactors, Flow visualization, Relief valves, Resonance, Safety, Pipes, Pressure, Vorticity, Power uprate