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Proceedings Papers

Study on Post-Buckling Behaviors of Lower Heads for Fracture Control of Reactor Vessels Under BDBE

Naoto Kasahara, Masato Murohara, Takuya Sato

Proc. ASME. PVP2022, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A037, July 17–22, 2022

Paper No: PVP2022-84449

DOI: https://doi.org/10.1115/PVP2022-84449

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Topics: Buckling, Fracture (Materials), Fracture (Process), Reactor vessels, Vessels

Proceedings Papers

Plan of a Shaking Table Test on a Piping System Model for Verifying the Fracture-Control Concept

Izumi Nakamura, Naoto Kasahara

Proc. ASME. PVP2022, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A036, July 17–22, 2022

Paper No: PVP2022-84266

DOI: https://doi.org/10.1115/PVP2022-84266

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Topics: Fracture (Materials), Fracture (Process), Pipes, Piping systems

Proceedings Papers

Prediction Concept of Ratchet-Induced Collapse Under Deadweight and Seismic Loading

Satoru Kai, Masakazu Ichimiya, Naoto Kasahara

Proc. ASME. PVP2022, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A038, July 17–22, 2022

Paper No: PVP2022-84508

DOI: https://doi.org/10.1115/PVP2022-84508

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Topics: Collapse

Journal Articles

Normalized Ratcheting Diagram Under Sinusoidal Vibration Waves

Jinqi Lyu, Naoto Kasahara, Masakazu Ichimiya, Ryunosuke Sasaki

J. Pressure Vessel Technol. June 2022, 144(3): 031305.

Paper No: PVT-20-1193

DOI: https://doi.org/10.1115/1.4053222

Published Online: February 10, 2022

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Topics: Pipes, Stress, Vibration, Waves, Shapes, Deformation

Journal Articles

Discussion on Failure Behavior of Piping Systems Under Extremely Large Seismic Loads in BDBE

Izumi Nakamura, Naoto Kasahara

J. Pressure Vessel Technol. June 2022, 144(3): 031901.

Paper No: PVT-20-1209

DOI: https://doi.org/10.1115/1.4053223

Published Online: January 18, 2022

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Topics: Alloys, Collapse, Failure, Failure mechanisms, Pipes, Piping systems, Simulation, Stress, Weight (Mass), Cycles

Proceedings Papers

Study on Buckling Strength and Post Buckling Behaviors of Reactor Vessel Lower Heads

Masato Murohara, Akira Yamazaki, Takuya Sato, Naoto Kasahara

Proc. ASME. ICONE28, Volume 4: Student Paper Competition, V004T14A072, August 4–6, 2021

Paper No: ICONE28-65553

DOI: https://doi.org/10.1115/ICONE28-65553

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Topics: Buckling, Reactor vessels, Failure, Design, Accidents, Deformation, Earthquakes, Fukushima nuclear disaster, Japan, 2011, High temperature, Nuclear reactor accidents

Proceedings Papers

Example Proposals of Fracture Controlled Vessels and Piping for Failure Mitigations

Naoto Kasahara, Takashi Wakai, Izumi Nakamura, Takuya Sato, Masakazu Ichimiya

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A031, July 13–15, 2021

Paper No: PVP2021-61952

DOI: https://doi.org/10.1115/PVP2021-61952

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Topics: Design, Failure, Fracture (Materials), Fracture (Process), Pipes, Vessels

Proceedings Papers

Proposal of Simulation Material Test Technique for Clarifying the Structure Failure Mechanisms Under Excessive Seismic Loads

Ryuta Hashidate, Shoichi Kato, Takashi Onizawa, Takashi Wakai, Naoto Kasahara

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A029, July 13–15, 2021

Paper No: PVP2021-61866

DOI: https://doi.org/10.1115/PVP2021-61866

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Topics: Constitutive equations, Failure mechanisms, Lead alloys, Simulation, Stress

Proceedings Papers

Dynamic Behavior of a Simplified Cantilever With Progressive Static Loading due to Ratchet Deformation

Satoru Kai, Naoto Kasahara, Masakazu Ichimiya

Proc. ASME. PVP2021, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A030, July 13–15, 2021

Paper No: PVP2021-61878

DOI: https://doi.org/10.1115/PVP2021-61878

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Topics: Cantilevers, Deformation, Failure mechanisms, Failure, Accidents, Excitation, Stress, Weight (Mass), Collapse, Cycles

Proceedings Papers

Application of Fracture Control to Mitigate Failure Consequence Under BDBE

Naoto Kasahara, Takashi Wakai, Izumi Nakamura, Takuya Sato, Masakazu Ichimiya

Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A038, August 3, 2020

Paper No: PVP2020-21072

DOI: https://doi.org/10.1115/PVP2020-21072

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Topics: Design, Failure, Failure mechanisms, Fracture (Materials), Fracture (Process)

Proceedings Papers

Investigation on Failure Behavior of Two-Elbow Piping System Models Made of the Simulation Material Under Excessive Seismic Loads

Izumi Nakamura, Naoto Kasahara

Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A039, August 3, 2020

Paper No: PVP2020-21140

DOI: https://doi.org/10.1115/PVP2020-21140

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Topics: Alloys, Collapse, Failure, Failure mechanisms, Piping systems, Simulation, Stress

Proceedings Papers

Frequency Dependency of Beam Collapse due to Vibration Loads

Ryunosuke Sasaki, Masakazu Ichimiya, Jinqi Lyu, Naoto Kasahara

Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A040, August 3, 2020

Paper No: PVP2020-21375

DOI: https://doi.org/10.1115/PVP2020-21375

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Topics: Collapse, Stress, Vibration

Proceedings Papers

Proposal of Simulation Materials Test Technique and Their Constitutive Equations for Structural Tests and Analyses Simulating Severe Accident Conditions

Ryuta Hashidate, Shoichi Kato, Takashi Onizawa, Takashi Wakai, Naoto Kasahara

Proc. ASME. PVP2020, Volume 3: Design and Analysis, V003T03A041, August 3, 2020

Paper No: PVP2020-21397

DOI: https://doi.org/10.1115/PVP2020-21397

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Topics: Accidents, Constitutive equations, Lead alloys, Simulation

Proceedings Papers

Experimental and Analytical Study on Local Failure of Structure Subjected to High Temperature and Pressure

Yoshiki Tsunemoto, Takashi Sakaguchi, Takuya Sato, Naoto Kasahara

Proc. ASME. PVP2019, Volume 3: Design and Analysis, V003T03A038, July 14–19, 2019

Paper No: PVP2019-93166

DOI: https://doi.org/10.1115/PVP2019-93166

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Topics: Ductile fracture, Failure, High temperature, Hydrostatics, Pressure, Stress

Proceedings Papers

Research Plan and Progress to Realize Fracture Control of Nuclear Components

Naoto Kasahara, Takashi Wakai, Izumi Nakamura, Takuya Sato

Proc. ASME. PVP2019, Volume 3: Design and Analysis, V003T03A039, July 14–19, 2019

Paper No: PVP2019-93545

DOI: https://doi.org/10.1115/PVP2019-93545

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Topics: Design, Failure mechanisms, Fracture (Materials)

Proceedings Papers

A Proposal of Inelastic Constitutive Equations of Lead Alloys Used for Structural Tests Simulating Severe Accident Conditions

Ryuta Hashidate, Takashi Onizawa, Takashi Wakai, Naoto Kasahara

Proc. ASME. PVP2019, Volume 3: Design and Analysis, V003T03A040, July 14–19, 2019

Paper No: PVP2019-93820

DOI: https://doi.org/10.1115/PVP2019-93820

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Topics: Accidents, Constitutive equations, Lead alloys

Proceedings Papers

Stress Evaluation Method by Frequency Response Function for Elbow Pipes Under Thermal Stratification

Salman Alrakan, Hiroshi Kuribayashi, Naoto Kasahara

Proc. ASME. PVP2018, Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition, V005T10A004, July 15–20, 2018

Paper No: PVP2018-84211

DOI: https://doi.org/10.1115/PVP2018-84211

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Topics: Evaluation methods, Frequency response, Pipes, Stress, Thermal stratification, Fatigue damage, Finite element analysis, Thermal stresses, Fatigue, Fluid oscillations

Proceedings Papers

Proposal of the Local Failure Evaluation Method With Stress Parameters

Takashi Sakaguchi, Mizuki Yoshida, Takuya Sato, Naoto Kasahara

Proc. ASME. PVP2018, Volume 3A: Design and Analysis, V03AT03A046, July 15–20, 2018

Paper No: PVP2018-84222

DOI: https://doi.org/10.1115/PVP2018-84222

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Topics: Evaluation methods, Failure, Stress, Fracture (Materials), Fracture (Process), Hydrostatics, Creep, Failure mechanisms, Nuclear power stations, Stress-strain curves

Proceedings Papers

Contribution to Safety Enhancement for BDBE in Structure and Material Fields

Naoto Kasahara, Takuya Sato, Andrei Blahoianu

Proc. ASME. PVP2018, Volume 3A: Design and Analysis, V03AT03A047, July 15–20, 2018

Paper No: PVP2018-84353

DOI: https://doi.org/10.1115/PVP2018-84353

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Topics: Safety, Accidents, Failure mechanisms, Design, Failure, Fracture (Materials), Fracture (Process), Fukushima nuclear disaster, Japan, 2011, Probabilistic risk assessment, Risk

Proceedings Papers

Improved Model Tests to Investigate the Failure Modes of Pipes Under Beyond Design Basis Earthquakes

Izumi Nakamura, Naoto Kasahara

Proc. ASME. PVP2018, Volume 3A: Design and Analysis, V03AT03A048, July 15–20, 2018

Paper No: PVP2018-84424

DOI: https://doi.org/10.1115/PVP2018-84424

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Topics: Design, Earthquakes, Failure mechanisms, Pipes, Alloys, Collapse, Simulation, Failure, Piping systems, Steel

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Journal citation

NARROW

Study on Post-Buckling Behaviors of Lower Heads for Fracture Control of Reactor Vessels Under BDBE

Plan of a Shaking Table Test on a Piping System Model for Verifying the Fracture-Control Concept

Prediction Concept of Ratchet-Induced Collapse Under Deadweight and Seismic Loading

Normalized Ratcheting Diagram Under Sinusoidal Vibration Waves

Discussion on Failure Behavior of Piping Systems Under Extremely Large Seismic Loads in BDBE

Study on Buckling Strength and Post Buckling Behaviors of Reactor Vessel Lower Heads

Example Proposals of Fracture Controlled Vessels and Piping for Failure Mitigations

Proposal of Simulation Material Test Technique for Clarifying the Structure Failure Mechanisms Under Excessive Seismic Loads

Dynamic Behavior of a Simplified Cantilever With Progressive Static Loading due to Ratchet Deformation

Application of Fracture Control to Mitigate Failure Consequence Under BDBE

Investigation on Failure Behavior of Two-Elbow Piping System Models Made of the Simulation Material Under Excessive Seismic Loads

Frequency Dependency of Beam Collapse due to Vibration Loads

Proposal of Simulation Materials Test Technique and Their Constitutive Equations for Structural Tests and Analyses Simulating Severe Accident Conditions

Experimental and Analytical Study on Local Failure of Structure Subjected to High Temperature and Pressure

Research Plan and Progress to Realize Fracture Control of Nuclear Components

A Proposal of Inelastic Constitutive Equations of Lead Alloys Used for Structural Tests Simulating Severe Accident Conditions

Stress Evaluation Method by Frequency Response Function for Elbow Pipes Under Thermal Stratification

Proposal of the Local Failure Evaluation Method With Stress Parameters

Contribution to Safety Enhancement for BDBE in Structure and Material Fields

Improved Model Tests to Investigate the Failure Modes of Pipes Under Beyond Design Basis Earthquakes

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