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Proceedings Papers

Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 8 — Assembly Static Test Results of Three-Dimensional Isolated Device by Bi-Axial Loadings

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Takahiro Somaki, Masaki Yukawa, Tsuyoshi Fukasawa, Tomoyuki Hirayama, Masato Uchita, Takayuki Miyagawa, Shigeki Okamura, Tomohiko Yamamoto, Tomoyoshi Watakabe, Masashi Miyazaki, Satoshi Fujita
Proc. ASME. PVP2024, Volume 5: Operations, Applications, & Components; Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division, V005T08A007, July 28–August 2, 2024
Publisher: American Society of Mechanical Engineers
Paper No: PVP2024-124495
https://doi.org/10.1115/PVP2024-124495
View Paper titled, Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 8 — Assembly Static Test Results of Three-Dimensional Isolated Device by Bi-Axial Loadings
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Topics: Industrial research, Manufacturing, Sodium fast reactors, Stress, Earthquake resistant design, Bearings, Dampers, Damping, Disks, Plates (structures)
Proceedings Papers

Research and Development of Three-Dimensional Isolation System for Sodium Cooled Fast Reactor: Part 7 Development Summary of Three-Dimensional Isolation System

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Tomoyoshi Watakabe, Tomohiko Yamamoto, Shigeki Okamura, Masashi Miyazaki, Takayuki Miyagawa, Masato Uchita, Tomoyuki Hirayama, Takahiro Somaki, Masaki Yukawa, Tsuyoshi Fukasawa, Satoshi Fujita
Proc. ASME. PVP2024, Volume 5: Operations, Applications, & Components; Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division, V005T08A005, July 28–August 2, 2024
Publisher: American Society of Mechanical Engineers
Paper No: PVP2024-122430
https://doi.org/10.1115/PVP2024-122430
View Paper titled, Research and Development of Three-Dimensional Isolation System for Sodium Cooled Fast Reactor: Part 7 Development Summary of Three-Dimensional Isolation System
Open the PDF for Research and Development of Three-Dimensional Isolation System for Sodium Cooled Fast Reactor: Part 7 Development Summary of Three-Dimensional Isolation System in another window
Topics: Disks, Industrial research, Sodium fast reactors, Springs, Earthquakes, Design, Light water reactors, Pipes, Stress, Bearings
Proceedings Papers

Research and Development of Three-Dimensional Isolation System For Sodium Cooled Fast Reactor Part 9: Evaluating Seismic Isolation Performance Through Seismic Response Analysis

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Tsuyoshi Fukasawa, Takahiro Somaki, Masaki Yukawa, Tomoyuki Hirayama, Tomoyoshi Watakabe, Tomohiko Yamamoto, Shigeki Okamura, Masashi Miyazaki, Masato Uchita, Takayuki Miyagawa, Satoshi Fujita
Proc. ASME. PVP2024, Volume 5: Operations, Applications, & Components; Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division, V005T08A004, July 28–August 2, 2024
Publisher: American Society of Mechanical Engineers
Paper No: PVP2024-121899
https://doi.org/10.1115/PVP2024-121899
View Paper titled, Research and Development of Three-Dimensional Isolation System For Sodium Cooled Fast Reactor Part 9: Evaluating Seismic Isolation Performance Through Seismic Response Analysis
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Topics: Bearings, Dampers, Design, Finite element methods, Finite element model, Industrial research, Rubber, Sodium fast reactors
Proceedings Papers

Study on Influence of Nonlinear Characteristics of Laminated Rubber Bearings on Reactor Buildings Including SMR

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Keito Kitagawa, Osamu Furuya, Shigeki Okamura
Proc. ASME. ICONE31, Volume 11: Student Paper Competition, V011T15A043, August 4–8, 2024
Publisher: American Society of Mechanical Engineers
Paper No: ICONE31-134933
https://doi.org/10.1115/ICONE31-134933
View Paper titled, Study on Influence of Nonlinear Characteristics of Laminated Rubber Bearings on Reactor Buildings Including SMR
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Topics: Bearings, Mechanical properties, Rubber, Small modular reactors, Structures
Proceedings Papers

Research and Examination of Seismic Safety Evaluation and Function Maintenance for Important Equipment in Nuclear Facilities

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Osamu Furuya, Satoshi Fujita, Hitoshi Muta, Yasuki Ohtori, Tatsuya Itoi, Shigeki Okamura, Keisuke Minagawa, Izumi Nakamura, Shigeru Fujimoto, Akihito Otani, Akemi Nishida, Tomoyoshi Watakabe
Proc. ASME. PVP2021, Volume 5: Operations, Applications, and Components; Seismic Engineering; Non-Destructive Examination, V005T08A022, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-61781
https://doi.org/10.1115/PVP2021-61781
View Paper titled, Research and Examination of Seismic Safety Evaluation and Function Maintenance for Important Equipment in Nuclear Facilities
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Topics: Maintenance, Nuclear power stations, Safety
Proceedings Papers

Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 5 — Isolation Performance Applied to Reactor Building

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Takahiro Somaki, Tsuyoshi Fukasawa, Shigeki Okamura, Takayuki Miyagawa, Masato Uchita, Tomohiko Yamamoto, Masashi Miyazaki, Satoshi Fujita
Proc. ASME. PVP2020, Volume 9: Seismic Engineering, V009T09A019, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21709
https://doi.org/10.1115/PVP2020-21709
View Paper titled, Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 5 — Isolation Performance Applied to Reactor Building
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Topics: Industrial research, Sodium fast reactors
Proceedings Papers

Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 6 — Development of High Speed Oil Damper for Isolated Building

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Tsuyoshi Fukasawa, Takahiro Somaki, Takayuki Miyagawa, Masato Uchita, Tomohiko Yamamoto, Masashi Miyazaki, Shigeki Okamura, Satoshi Fujita
Proc. ASME. PVP2020, Volume 9: Seismic Engineering, V009T09A018, August 3, 2020
Publisher: American Society of Mechanical Engineers
Paper No: PVP2020-21320
https://doi.org/10.1115/PVP2020-21320
View Paper titled, Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 6 — Development of High Speed Oil Damper for Isolated Building
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Topics: Dampers, Industrial research, Sodium fast reactors
Proceedings Papers

Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 3 — Characteristics for Elements on Basis of Half-Scale Loading Tests

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Takahiro Somaki, Tsuyoshi Fukasawa, Shigeki Okamura, Takayuki Miyagawa, Masato Uchita, Tomohiko Yamamoto, Tomoyoshi Watakabe, Satoshi Fujita
Proc. ASME. PVP2019, Volume 8: Seismic Engineering, V008T08A037, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93475
https://doi.org/10.1115/PVP2019-93475
View Paper titled, Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 3 — Characteristics for Elements on Basis of Half-Scale Loading Tests
Open the PDF for Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 3 — Characteristics for Elements on Basis of Half-Scale Loading Tests in another window
Topics: Bearings, Disks, Industrial research, Rubber, Sodium fast reactors, Springs, Dampers, Design methodology, Displacement, Dynamic testing (Materials)
Proceedings Papers

Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 4 — Proposal of Optimal Combination Method for Disc Spring Units and Newly Friction Model for Sliding Elements

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Tsuyoshi Fukasawa, Shigeki Okamura, Takahiro Somaki, Takayuki Miyagawa, Masato Uchita, Tomohiko Yamamoto, Tomoyoshi Watakabe, Satoshi Fujita
Proc. ASME. PVP2019, Volume 8: Seismic Engineering, V008T08A038, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93480
https://doi.org/10.1115/PVP2019-93480
View Paper titled, Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 4 — Proposal of Optimal Combination Method for Disc Spring Units and Newly Friction Model for Sliding Elements
Open the PDF for Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 4 — Proposal of Optimal Combination Method for Disc Spring Units and Newly Friction Model for Sliding Elements in another window
Topics: Disks, Friction, Industrial research, Sodium fast reactors, Springs, Algorithms, Bearings, Dampers, Dimensions, Quality control
Proceedings Papers

Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 1 — Proposal of Analytical Models Based on Loading Tests

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Tsuyoshi Fukasawa, Shigeki Okamura, Takahiro Somaki, Takayuki Miyagawa, Masato Uchita, Tomohiko Yamamoto, Tomoyoshi Watakabe, Satoshi Fujita
Proc. ASME. PVP2018, Volume 8: Seismic Engineering, V008T08A038, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84532
https://doi.org/10.1115/PVP2018-84532
View Paper titled, Research and Development of Three-Dimensional Isolation System for Sodium-Cooled Fast Reactor: Part 1 — Proposal of Analytical Models Based on Loading Tests
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Topics: Bearings, Dampers, Damping, Design, Differential equations, Disks, Industrial research, Reactor vessels, Rubber, Sodium fast reactors
Journal Articles

Research and Development of Rubber Bearings for Sodium-Cooled Fast Reactor: Ultimate Properties of Half-Scale Thick Rubber Bearings Based on Breaking Tests

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Tsuyoshi Fukasawa, Shigeki Okamura, Tomohiko Yamamoto, Nobuchika Kawasaki, Tsutomu Hirotani, Eriko Moriizumi, Yu Sakurai, Nobuo Masaki
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. February 2018, 140(1): 011401.
Paper No: PVT-16-1160
https://doi.org/10.1115/1.4038435
Published Online: November 30, 2017
View Articletitled, Research and Development of Rubber Bearings for Sodium-Cooled Fast Reactor: Ultimate Properties of Half-Scale Thick Rubber Bearings Based on Breaking Tests
Open the PDF for Research and Development of Rubber Bearings for Sodium-Cooled Fast Reactor: Ultimate Properties of Half-Scale Thick Rubber Bearings Based on Breaking Tests in another window
Topics: Bearings, Design, Rubber, Shear (Mechanics), Stiffness, Stress, Hardening, Sodium fast reactors, Compressive stress
Proceedings Papers

Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 5 — Non-Linear Analytical Models for Thick Rubber Bearing

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Tsutomu Hirotani, Takahiro Mori, Tsuyoshi Fukasawa, Shigeki Okamura, Tomohiko Yamamoto, Tomoyoshi Watakabe
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A046, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65655
https://doi.org/10.1115/PVP2017-65655
View Paper titled, Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 5 — Non-Linear Analytical Models for Thick Rubber Bearing
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Topics: Bearings, Rubber, Sodium fast reactors, Finite element methods, Finite element model, Springs, Elasticity, Finite element analysis, Shear (Mechanics), Thermal stresses
Proceedings Papers

Research and Development of Three Dimensional Seismic Isolation System Utilized Coned-Disc-Springs With Rubber Bearings

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Takayuki Miyagawa, Tomoyoshi Watakabe, Tomohiko Yamamoto, Tsuyoshi Fukasawa, Shigeki Okamura
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A043, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65549
https://doi.org/10.1115/PVP2017-65549
View Paper titled, Research and Development of Three Dimensional Seismic Isolation System Utilized Coned-Disc-Springs With Rubber Bearings
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Topics: Bearings, Disks, Industrial research, Rubber, Springs, Sodium fast reactors, Stress, Buckling, Design, Reactor vessels
Proceedings Papers

Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 6 — Proposal of New Type of Hysteresis Model for Ultimate Behavior

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Tsuyoshi Fukasawa, Shigeki Okamura, Tomohiko Yamamoto, Tomoyoshi Watakabe
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A044, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65557
https://doi.org/10.1115/PVP2017-65557
View Paper titled, Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 6 — Proposal of New Type of Hysteresis Model for Ultimate Behavior
Open the PDF for Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 6 — Proposal of New Type of Hysteresis Model for Ultimate Behavior in another window
Topics: Bearings, Rubber, Sodium fast reactors, Design, Differential equations, Deformation, Earthquakes, Probabilistic risk assessment, Risk
Proceedings Papers

Core Seismic Experiment and Analysis of Hexagonal Bundle Model for Fast Reactor

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Akihisa Iwasaki, Shinichiro Matsubara, Tomohiko Yamamoto, Seiji Kitamura, Shigeki Okamura
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A051, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65354
https://doi.org/10.1115/PVP2017-65354
View Paper titled, Core Seismic Experiment and Analysis of Hexagonal Bundle Model for Fast Reactor
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Topics: Fast neutron reactors, Displacement, Design, Dimensions, Earthquakes, Fluid structure interaction, Seismic analysis, Vibration analysis
Proceedings Papers

Core Seismic Experiment and Analysis of a Large Number of Element Models for Fast Reactor

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Akihisa Iwasaki, Shinichiro Matsubara, Tomohiko Yamamoto, Seiji Kitamura, Shigeki Okamura
Proc. ASME. PVP2017, Volume 8: Seismic Engineering, V008T08A052, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65357
https://doi.org/10.1115/PVP2017-65357
View Paper titled, Core Seismic Experiment and Analysis of a Large Number of Element Models for Fast Reactor
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Topics: Fast neutron reactors, Displacement, Design, Dimensions, Earthquakes, Fluid structure interaction, Seismic analysis, Vibration analysis
Proceedings Papers

Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 4 — Aging Properties of a Half Scale Thick Rubber Bearings Based on Breaking Test

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Tomoyoshi Watakabe, Tomohiko Yamamoto, Tsuyoshi Fukasawa, Shigeki Okamura, Takahiro Somaki, Ryota Morobishi, Yu Sakurai, Kouji Kato
Proc. ASME. PVP2016, Volume 8: Seismic Engineering, V008T08A033, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63105
https://doi.org/10.1115/PVP2016-63105
View Paper titled, Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 4 — Aging Properties of a Half Scale Thick Rubber Bearings Based on Breaking Test
Open the PDF for Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 4 — Aging Properties of a Half Scale Thick Rubber Bearings Based on Breaking Test in another window
Topics: Bearings, Rubber, Sodium fast reactors, Mechanical properties, Dampers, Stress, Tensile strength
Proceedings Papers

Development of Seismic Isolation Systems for Sodium-Cooled Fast Reactors in Japan

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Nobuchika Kawasaki, Tomoyoshi Watakabe, Takashi Wakai, Tomohiko Yamamoto, Tsuyoshi Fukasawa, Shigeki Okamura
Proc. ASME. PVP2016, Volume 8: Seismic Engineering, V008T08A037, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63437
https://doi.org/10.1115/PVP2016-63437
View Paper titled, Development of Seismic Isolation Systems for Sodium-Cooled Fast Reactors in Japan
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Topics: Sodium fast reactors, Springs, Dampers, Design, Disks, Bearings, Buckling, Damping, Diluents, Earthquake resistant design
Proceedings Papers

Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 3 — Ultimate Properties of a Half Scale Thick Rubber Bearings Based on Breaking Test

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Tsuyoshi Fukasawa, Shigeki Okamura, Tomohiko Yamamoto, Nobuchika Kawasaki, Tsutomu Hirotani, Eriko Moriizumi, Yu Sakurai, Nobuo Masaki
Proc. ASME. PVP2016, Volume 8: Seismic Engineering, V008T08A035, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63397
https://doi.org/10.1115/PVP2016-63397
View Paper titled, Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 3 — Ultimate Properties of a Half Scale Thick Rubber Bearings Based on Breaking Test
Open the PDF for Development on Rubber Bearings for Sodium-Cooled Fast Reactor: Part 3 — Ultimate Properties of a Half Scale Thick Rubber Bearings Based on Breaking Test in another window
Topics: Bearings, Rubber, Sodium fast reactors, Stress, Damping, Knudsen number, Nuclear power stations, Probabilistic risk assessment, Safety, Stiffness
Proceedings Papers

Core Seismic Experiment of a Full-Scale Single Model for a Fast Reactor

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Akihisa Iwasaki, Naoki Sawa, Shinichiro Matsubara, Seiji Kitamura, Shigeki Okamura
Proc. ASME. PVP2016, Volume 8: Seismic Engineering, V008T08A044, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63461
https://doi.org/10.1115/PVP2016-63461
View Paper titled, Core Seismic Experiment of a Full-Scale Single Model for a Fast Reactor
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Topics: Fast neutron reactors, Vibration, Water, Fluids, Shock absorbers, Coolants, Earthquakes, Flow (Dynamics), Gravity (Force), Thermal expansion