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Satoshi Okajima
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Proceedings Papers

Development of the Buckling Evaluation Method for Large Scale Vessels in Fast Reactors by the Testing of Grade 91 Steel and Austenitic Stainless Steel Vessels Subjected to Horizontal and Cyclic Vertical Loading

Takashi Okafuji, Kazuhiro Miura, Hiromi Sago, Hisatomo Murakami, Masanori Ando, Satoshi Okajima
Proc. ASME. PVP2023, Volume 1: Codes & Standards, V001T01A037, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-105707
https://doi.org/10.1115/PVP2023-105707
View Paper titled, Development of the Buckling Evaluation Method for Large Scale Vessels in Fast Reactors by the Testing of Grade 91 Steel and Austenitic Stainless Steel Vessels Subjected to Horizontal and Cyclic Vertical Loading
Open the PDF for Development of the Buckling Evaluation Method for Large Scale Vessels in Fast Reactors by the Testing of Grade 91 Steel and Austenitic Stainless Steel Vessels Subjected to Horizontal and Cyclic Vertical Loading in another window
Topics: Buckling, Evaluation methods, Fast neutron reactors, Stainless steel, Steel, Testing, Vessels, Stress, Design, Yield stress
Proceedings Papers

Application of First-Order Method to Estimate Structural Integrity in a Probabilistic Form of Component Subjected to Thermal Transient for Optimization of Design Parameter

Satoshi Okajima, Takero Mori, Norihiro Kikuchi, Masaaki Tanaka, Masashi Miyazaki
Proc. ASME. ICONE29, Volume 4: SMRs, Advanced Reactors, and Fusion, V004T04A001, August 8–12, 2022
Publisher: American Society of Mechanical Engineers
Paper No: ICONE29-88933
https://doi.org/10.1115/ICONE29-88933
View Paper titled, Application of First-Order Method to Estimate Structural Integrity in a Probabilistic Form of Component Subjected to Thermal Transient for Optimization of Design Parameter
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Topics: Design, Failure, Optimization, Probability, Transients (Dynamics)
Proceedings Papers

Assessment of the Impact of Elevated Temperature Design Code Revisions on Creep Damage Estimation

Masanori Ando, Satoshi Okajima, Hideki Takasho
Proc. ASME. PVP2022, Volume 1: Codes and Standards, V001T01A029, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-82890
https://doi.org/10.1115/PVP2022-82890
View Paper titled, Assessment of the Impact of Elevated Temperature Design Code Revisions on Creep Damage Estimation
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Topics: Creep, Damage, Design, Temperature
Proceedings Papers

Development of the Buckling Evaluation Method for Large Scale Vessel in Fast Reactors by the Testing of Austenitic Stainless Steel Vessel With Severe Initial Imperfection Subjected to Horizontal and Vertical Loading

Takashi Okafuji, Kazuhiro Miura, Hiromi Sago, Hisatomo Murakami, Masanori Ando, Satoshi Okajima
Proc. ASME. PVP2022, Volume 1: Codes and Standards, V001T01A032, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-84605
https://doi.org/10.1115/PVP2022-84605
View Paper titled, Development of the Buckling Evaluation Method for Large Scale Vessel in Fast Reactors by the Testing of Austenitic Stainless Steel Vessel With Severe Initial Imperfection Subjected to Horizontal and Vertical Loading
Open the PDF for Development of the Buckling Evaluation Method for Large Scale Vessel in Fast Reactors by the Testing of Austenitic Stainless Steel Vessel With Severe Initial Imperfection Subjected to Horizontal and Vertical Loading in another window
Topics: Buckling, Evaluation methods, Fast neutron reactors, Stainless steel, Testing, Vessels, Steel, Stress, Design, Power stations
Proceedings Papers

Seismic Assessment of Crossover Piping on a Sodium Cooled Fast Reactor With Three-Dimensional Isolation System

Tomoyoshi Watakabe, Takahiro Okuda, Satoshi Okajima
Proc. ASME. PVP2022, Volume 5: Operations, Applications, and Components; Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division, V005T08A011, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-85412
https://doi.org/10.1115/PVP2022-85412
View Paper titled, Seismic Assessment of Crossover Piping on a Sodium Cooled Fast Reactor With Three-Dimensional Isolation System
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Topics: Pipes, Sodium fast reactors
Proceedings Papers

Development of the External Pressure Charts for 2¼Cr-1Mo and Mod.9Cr-1Mo Steel at Elevated Temperature Design

Masanori Ando, Satoshi Okajima, Kazumichi Imo
Proc. ASME. PVP2019, Volume 1: Codes and Standards, V001T01A041, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93777
https://doi.org/10.1115/PVP2019-93777
View Paper titled, Development of the External Pressure Charts for 2¼Cr-1Mo and Mod.9Cr-1Mo Steel at Elevated Temperature Design
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Topics: Buckling, Design, External pressure, Steel, Temperature
Journal Articles

A Screening Method for Prevention of Ratcheting Strain Derived From Movement of Temperature Distribution

Satoshi Okajima, Takashi Wakai, Masanori Ando, Yasuhiro Inoue, Sota Watanabe
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. October 2016, 138(5): 051204.
Paper No: PVT-15-1222
https://doi.org/10.1115/1.4032989
Published Online: April 29, 2016
View Articletitled, A Screening Method for Prevention of Ratcheting Strain Derived From Movement of Temperature Distribution
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Topics: Membranes, Stress, Temperature, Temperature distribution, Design
Proceedings Papers

Development of Structural Codes for JSFR Based on the System Based Code Concept

Tai Asayama, Takashi Wakai, Masanori Ando, Satoshi Okajima, Yuji Nagae, Shigeru Takaya, Takashi Onizawa, Kazuyuki Tsukimori, Masaki Morishita
Proc. ASME. PVP2014, Volume 1: Codes and Standards, V001T01A064, July 20–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: PVP2014-28853
https://doi.org/10.1115/PVP2014-28853
View Paper titled, Development of Structural Codes for JSFR Based on the System Based Code Concept
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Topics: Construction, Design, Fast neutron reactors, Fitness-for-service, Industrial research, Japan Society of Mechanical Engineers, Leak-before-break, Reliability, Sodium fast reactors, Welding
Proceedings Papers

Proposal of the Screening Method for Prevention of the Accumulation of the Ratcheting Strain Derived From the Movement of the Temperature Distribution

Satoshi Okajima, Takashi Wakai, Masanori Ando, Yasuhiro Inoue, Sota Watanabe
Proc. ASME. PVP2014, Volume 1: Codes and Standards, V001T01A065, July 20–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: PVP2014-28875
https://doi.org/10.1115/PVP2014-28875
View Paper titled, Proposal of the Screening Method for Prevention of the Accumulation of the Ratcheting Strain Derived From the Movement of the Temperature Distribution
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Topics: Temperature distribution, Stress, Deformation, Design, Evaluation methods, Cylinders, Finite element methods, Wall thickness, Yield strength, Bending (Stress)
Proceedings Papers

The Creep-Fatigue Evaluation Method for Intermediate Hold Conditions: Proposal and Validation

Satoshi Okajima, Nobuchika Kawasaki, Shoichi Kato, Naoto Kasahara
Proc. ASME. PVP2011, Volume 1: Codes and Standards, 365-372, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57285
https://doi.org/10.1115/PVP2011-57285
View Paper titled, The Creep-Fatigue Evaluation Method for Intermediate Hold Conditions: Proposal and Validation
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Topics: Creep, Evaluation methods, Fatigue, Damage, Stress, Fracture (Materials), Reactor vessels, Sodium, Relaxation (Physics), Temperature gradient
Journal Articles

Design Evaluation Method for Random Fatigue Based on Spectrum Characteristics

Shinsuke Sakai, Satoshi Okajima, Satoshi Izumi, Naoto Kasahara
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research Papers
J. Pressure Vessel Technol. June 2012, 134(3): 031204.
https://doi.org/10.1115/1.4005874
Published Online: May 17, 2012
View Articletitled, Design Evaluation Method for Random Fatigue Based on Spectrum Characteristics
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Topics: Design, Fatigue, Fatigue damage, Stress, Damage, Spectral energy distribution, Computer simulation, Waves, Steel
Proceedings Papers

Development of System Based Code: Part 2—Application of Reliability Target for Configuration of ISI Request

Shigeru Takaya, Satoshi Okajima, Kenich Kurisaka, Tai Asayama, Hideo Machida, Yoshio Kamishima
Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 6, 413-418, May 17–21, 2010
Publisher: American Society of Mechanical Engineers
Paper No: ICONE18-29657
https://doi.org/10.1115/ICONE18-29657
View Paper titled, Development of System Based Code: Part 2—Application of Reliability Target for Configuration of ISI Request
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Topics: Reliability, Failure, Probability, Reactor vessels, Safety, Breeder reactors, Creep, Fatigue, Fracture (Materials), Fracture (Process)
Proceedings Papers

Design Evaluation Method for Random Fatigue Based on Spectrum Characteristics

Shinsuke Sakai, Satoshi Okajima, Satoshi Izumi, Naoto Kasahara
Proc. ASME. PVP2009, Volume 3: Design and Analysis, 301-307, July 26–30, 2009
Publisher: American Society of Mechanical Engineers
Paper No: PVP2009-77217
https://doi.org/10.1115/PVP2009-77217
View Paper titled, Design Evaluation Method for Random Fatigue Based on Spectrum Characteristics
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Topics: Design, Evaluation methods, Fatigue, Fatigue damage, Spectral energy distribution, Stress
Proceedings Papers

Direct Damage Evaluation Method for Thermal Fatigue Based on Power Spectrum Density Functions

Shinsuke Sakai, Kei Honda, Satoshi Okajima, Satoshi Izumi, Naoto Kasahara
Proc. ASME. PVP2007, Volume 3: Design and Analysis, 529-535, July 22–26, 2007
Publisher: American Society of Mechanical Engineers
Paper No: PVP2007-26168
https://doi.org/10.1115/PVP2007-26168
View Paper titled, Direct Damage Evaluation Method for Thermal Fatigue Based on Power Spectrum Density Functions
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Topics: Damage, Density, Evaluation methods, Fatigue, Fatigue damage
Proceedings Papers

Bayesian Inference Method for Failure Probability of Wall Thinning Pipe in Corrosion Rate Fluctuation Model

Satoshi Okajima, Satoshi Izumi, Shinsuke Sakai
Proc. ASME. PVP2008, Volume 1: Codes and Standards, 411-418, July 27–31, 2008
Publisher: American Society of Mechanical Engineers
Paper No: PVP2008-61457
https://doi.org/10.1115/PVP2008-61457
View Paper titled, Bayesian Inference Method for Failure Probability of Wall Thinning Pipe in Corrosion Rate Fluctuation Model
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Topics: Corrosion, Failure, Pipes, Probability, Errors, Inspection
Proceedings Papers

Fatigue Damage Evaluation for Thermal Striping Phenomena Using Analytical Spectrum Method

Satoshi Okajima, Shinsuke Sakai, Satoshi Izumi, Atsushi Iwasaki, Naoto Kasahara
Proc. ASME. PVP2005, Volume 5: High Pressure Technology, Nondestructive Evaluation, Pipeline Systems, Student Paper Competition, 245-249, July 17–21, 2005
Publisher: American Society of Mechanical Engineers
Paper No: PVP2005-71682
https://doi.org/10.1115/PVP2005-71682
View Paper titled, Fatigue Damage Evaluation for Thermal Striping Phenomena Using Analytical Spectrum Method
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Topics: Fatigue damage, Design, Stress, Analytical methods, Fluids, Cycles, Damage, Density, Heat conduction, Heat transfer