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Journal Articles

Comprehensive Seismic Evaluation of HTTR Against the 2011 Off the Pacific Coast of Tohoku Earthquake

Masato Ono, Kazuhiko Iigaki, Hiroaki Sawahata, Yosuke Shimazaki, Atsushi Shimizu, Hiroyuki Inoi, Toshinari Kondo, Keidai Kojima, Shoji Takada, Kazuhiro Sawa
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research-Article
ASME J of Nuclear Rad Sci. April 2018, 4(2): 020906.
Paper No: NERS-16-1104
https://doi.org/10.1115/1.4039288
Published Online: March 5, 2018
View Article titled, Comprehensive Seismic Evaluation of HTTR Against the 2011 Off the Pacific Coast of Tohoku Earthquake
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Topics: Earthquakes, Inspection, Instrumentation, Pacific Ocean, Shorelines, Optical quality control
Journal Articles

Study on Sensitivity of Control Rod Cell Model in Reflector Region of High-Temperature Engineering Test Reactor

Yuki Honda, Nozomu Fujimoto, Hiroaki Sawahata, Shoji Takada, Kazuhiro Sawa
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research Papers
ASME J of Nuclear Rad Sci. January 2017, 3(1): 011005.
Paper No: NERS-15-1226
https://doi.org/10.1115/1.4033813
Published Online: December 20, 2016
View Article titled, Study on Sensitivity of Control Rod Cell Model in Reflector Region of High-Temperature Engineering Test Reactor
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Topics: High temperature, Neutron flux, Rods, Fuels, Design, Temperature, Computational methods
Journal Articles

Burn-Up Dependency of Control Rod Position at Zero-Power Criticality in the High-Temperature Engineering Test Reactor

Yuki Honda, Nozomu Fujimoto, Hiroaki Sawahata, Shoji Takada, Kazuhiro Sawa
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research Papers
ASME J of Nuclear Rad Sci. January 2017, 3(1): 011013.
Paper No: NERS-15-1220
https://doi.org/10.1115/1.4033812
Published Online: December 20, 2016
View Article titled, Burn-Up Dependency of Control Rod Position at Zero-Power Criticality in the High-Temperature Engineering Test Reactor
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Topics: Evaluation methods, High temperature, Temperature, Design, Cycles, Temperature distribution, Physics, Very high temperature reactors
Proceedings Papers

Confirmation of Seismic Integrity of HTTR Against 2011 Great East Japan Earthquake

Masato Ono, Kazuhiko Iigaki, Yosuke Shimazaki, Atsushi Shimizu, Hiroyuki Inoi, Daisuke Tochio, Shimpei Hamamoto, Tetsuo Nishihara, Shoji Takada, Kazuhiro Sawa, Toshinari Kondo, Keidai Kojima
Proc. ASME. ICONE24, Volume 2: Smart Grids, Grid Stability, and Offsite and Emergency Power; Advanced and Next Generation Reactors, Fusion Technology; Safety, Security, and Cyber Security; Codes, Standards, Conformity Assessment, Licensing, and Regulatory Issues, V002T06A023, June 26–30, 2016
Publisher: American Society of Mechanical Engineers
Paper No: ICONE24-60571
https://doi.org/10.1115/ICONE24-60571
View Paper titled, Confirmation of Seismic Integrity of HTTR Against 2011 Great East Japan Earthquake
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Topics: Earthquakes, Inspection, Instrumentation, Very high temperature reactors, Damage, Earthquake resistant design, High temperature, Industrial research, Maintenance, Nuclear power
Journal Articles

Investigation of Countermeasure Against Local Temperature Rise in Vessel Cooling System in Loss of Core Cooling Test Without Nuclear Heating

Masato Ono, Atsushi Shimizu, Makoto Kondo, Yosuke Shimazaki, Masanori Shinohara, Daisuke Tochio, Kazuhiko Iigaki, Shigeaki Nakagawa, Shoji Takada, Kazuhiro Sawa
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Technical Briefs
ASME J of Nuclear Rad Sci. October 2016, 2(4): 044502.
Paper No: NERS-15-1178
https://doi.org/10.1115/1.4032478
Published Online: October 12, 2016
View Article titled, Investigation of Countermeasure Against Local Temperature Rise in Vessel Cooling System in Loss of Core Cooling Test Without Nuclear Heating
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Topics: Cooling, Heating, Temperature, Water, Cooling systems, Vessels, Flow (Dynamics), Heat
Journal Articles

Nuclear Heat Supply Fluctuation Tests by Non-Nuclear Heating With HTTR

Yoshitomo Inaba, Kenji Sekita, Takahiro Nemoto, Yuki Honda, Daisuke Tochio, Hiroyuki Sato, Shigeaki Nakagawa, Shoji Takada, Kazuhiro Sawa
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research Papers
ASME J of Nuclear Rad Sci. October 2016, 2(4): 041001.
Paper No: NERS-15-1194
https://doi.org/10.1115/1.4034320
Published Online: October 12, 2016
View Article titled, Nuclear Heat Supply Fluctuation Tests by Non-Nuclear Heating With HTTR
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Topics: Coolants, Heat, Heating, Pressure, Temperature, Graphite, Helium, Heat transfer, Stress
Journal Articles

Development of the Prediction Technology of Cable Disconnection of In-Core Neutron Detector for the Future High-Temperature Gas-Cooled Reactors

Yosuke Shimazaki, Hiroaki Sawahata, Taiki Kawamoto, Hisashi Suzuki, Masanori Shinohara, Yuki Honda, Kozo Katsuyama, Shoji Takada, Kazuhiro Sawa
Journal: Journal of Nuclear Engineering and Radiation Science
Publisher: ASME
Article Type: Research Papers
ASME J of Nuclear Rad Sci. October 2016, 2(4): 041008.
Paper No: NERS-15-1201
https://doi.org/10.1115/1.4032597
Published Online: October 12, 2016
View Article titled, Development of the Prediction Technology of Cable Disconnection of In-Core Neutron Detector for the Future High-Temperature Gas-Cooled Reactors
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Topics: Cables, Neutrons, Sensors, Very high temperature reactors, Maintenance
Proceedings Papers

Influence of Differences Between Seismic Safety Evaluation Methods for Equipment and Piping of a Nuclear Facility

Akemi Nishida, Kazuhiko Iigaki, Kazuhiro Sawa, Yinsheng Li
Proc. ASME. PVP2015, Volume 8: Seismic Engineering, V008T08A014, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45913
https://doi.org/10.1115/PVP2015-45913
View Paper titled, Influence of Differences Between Seismic Safety Evaluation Methods for Equipment and Piping of a Nuclear Facility
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Topics: Evaluation methods, Pipes, Safety, Waves, Cooling systems, Piping systems
Proceedings Papers

Structural Analysis for Assembly by Integrating Parts

Norihiro Nakajima, Akemi Nishida, Yoshiaki Kawakami, Tatsuo Okada, Osamu Tsuruta, Kazuhiro Sawa, Kazuhiko Iigaki
Proc. ASME. ICONE22, Volume 1: Plant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Plant Systems, Structures and Components; Codes, Standards, Licensing and Regulatory Issues, V001T03A009, July 7–11, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ICONE22-30251
https://doi.org/10.1115/ICONE22-30251
View Paper titled, Structural Analysis for Assembly by Integrating Parts
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Topics: Manufacturing, Structural analysis, Computers, Finite element analysis, High temperature, Nuclear power
Proceedings Papers

Preliminary Study on Thermal-Load Fluctuation Test Using HTTR

Daisuke Tochio, Yosuke Shimazaki, Kazuhiko Iigaki, Shigeaki Nakagawa, Shoji Takada, Nariaki Sakaba, Kazuhiro Sawa
Proc. ASME. ICONE21, Volume 2: Plant Systems, Construction, Structures and Components; Next Generation Reactors and Advanced Reactors, V002T05A034, July 29–August 2, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICONE21-16082
https://doi.org/10.1115/ICONE21-16082
View Paper titled, Preliminary Study on Thermal-Load Fluctuation Test Using HTTR
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Topics: Stress, Dynamics (Mechanics), Hydrogen production, Combined heat and power, Design, Hydrogen, Industrial plants, Scram, Steady state, Very high temperature reactors
Proceedings Papers

A Safety Evaluation of HTTR Core Components Against 2011 Tohoku Earthquake

Kazuhiko Iigaki, Masato Ono, Yosuke Shimazaki, Daisuke Tochio, Atsushi Shimizu, Hiroyuki Inoi, Shoji Takada, Kazuhiro Sawa
Proc. ASME. ICONE21, Volume 2: Plant Systems, Construction, Structures and Components; Next Generation Reactors and Advanced Reactors, V002T05A035, July 29–August 2, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICONE21-16091
https://doi.org/10.1115/ICONE21-16091
View Paper titled, A Safety Evaluation of HTTR Core Components Against 2011 Tohoku Earthquake
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Topics: Earthquakes, Safety, Seismic analysis, Design, Graphite, Inspection, Magnification, Optical quality control, Seismic waves, Stress
Proceedings Papers

Improvement of Temperature Evaluation Model of Biological Shielding Concrete for HTTR Test Simulating LOFC With VCS Inactive

Shoji Takada, Shunki Yanagi, Kazuhiko Iigaki, Masanori Shinohara, Daisuke Tochio, Yosuke Shimazaki, Masato Ono, Kazuhiro Sawa
Proc. ASME. ICONE21, Volume 2: Plant Systems, Construction, Structures and Components; Next Generation Reactors and Advanced Reactors, V002T05A036, July 29–August 2, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICONE21-16095
https://doi.org/10.1115/ICONE21-16095
View Paper titled, Improvement of Temperature Evaluation Model of Biological Shielding Concrete for HTTR Test Simulating LOFC With VCS Inactive
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Topics: Concretes, Temperature, Cooling, Heat transfer, Fins, Heat conduction, Natural convection, Thermal radiation, Very high temperature reactors, Water
Proceedings Papers

Investigation on Iodine Release Behavior During the Operation of High Temperature Engineering Test Reactor (HTTR)

Shohei Ueta, Hiroyuki Inoi, Yoshitaka Mizutani, Hirofumi Ohashi, Jin Iwatsuki, Nariaki Sakaba, Kazuhiro Sawa
Proc. ASME. ICONE21, Volume 2: Plant Systems, Construction, Structures and Components; Next Generation Reactors and Advanced Reactors, V002T05A038, July 29–August 2, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICONE21-16128
https://doi.org/10.1115/ICONE21-16128
View Paper titled, Investigation on Iodine Release Behavior During the Operation of High Temperature Engineering Test Reactor (HTTR)
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Topics: High temperature, Coolants, Isotopes, Testing, Circuits, Cooling, Fuels, Nuclear power, Nuclides, Radiation (Physics)
Proceedings Papers

Reactor Kinetics in a Loss-of-Forced-Cooling (LOFC) Test of HTGRs

Kuniyoshi Takamatsu, Kazuhiro Sawa
Proc. ASME. ICONE20-POWER2012, Volume 2: Plant Systems, Structures, and Components; Safety and Security; Next Generation Systems; Heat Exchangers and Cooling Systems, 659-668, July 30–August 3, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICONE20-POWER2012-54641
https://doi.org/10.1115/ICONE20-POWER2012-54641
View Paper titled, Reactor Kinetics in a Loss-of-Forced-Cooling (LOFC) Test of HTGRs
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Topics: Cooling, Nuclear reactor kinetics, Very high temperature reactors, Coolants, High temperature, Control systems, Heat, Safety, Temperature, Accidents
Proceedings Papers

Development of High Temperature Gas-Cooled Reactor Fuel for Extended Burnup

Shohei Ueta, Jun Aihara, Masaki Honda, Noboru Furihata, Kazuhiro Sawa
Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 6, 11-12, May 17–21, 2010
Publisher: American Society of Mechanical Engineers
Paper No: ICONE18-29206
https://doi.org/10.1115/ICONE18-29206
View Paper titled, Development of High Temperature Gas-Cooled Reactor Fuel for Extended Burnup
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Topics: Fuels, Very high temperature reactors, Carbon, Coating processes, Coatings, Particulate matter, Nuclear fission, High temperature, Nuclear power, Polishing equipment
Proceedings Papers

RAPHAEL-FT & Generation IV PYCASSO-I Irradiation

Sander de Groot, Virginie Basini, Pierre Guillermier, Klaas Bakker, Kazuhiro Sawa, Young-Woo Lee, Jean-Michel Escleine, Marc Perez, Shohei Ueta, Bong-Goo Kim
Proc. ASME. HTR2008, Fourth International Topical Meeting on High Temperature Reactor Technology, Volume 2, 337-346, September 28–October 1, 2008
Publisher: American Society of Mechanical Engineers
Paper No: HTR2008-58127
https://doi.org/10.1115/HTR2008-58127
View Paper titled, RAPHAEL-FT & Generation IV PYCASSO-I Irradiation
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Topics: Irradiation (Radiation exposure), Coatings, Manufacturing, Fuels, Particulate matter, Corrosion, Creep, Design, Dimensions, Electrical conductivity
Proceedings Papers

Analytical Study on Micro-Indentation Method to Integrity Evaluation for Graphite Components in HTGR

Junya Sumtia, Satoshi Hanawa, Taiju Shibata, Tatsuya Tada, Tatsuo Iyoku, Kazuhiro Sawa
Proc. ASME. ICONE14, Volume 1: Plant Operations, Maintenance and Life Cycle; Component Reliability and Materials Issues; Codes, Standards, Licensing and Regulatory Issues; Fuel Cycle and High Level Waste Management, 523-530, July 17–20, 2006
Publisher: American Society of Mechanical Engineers
Paper No: ICONE14-89384
https://doi.org/10.1115/ICONE14-89384
View Paper titled, Analytical Study on Micro-Indentation Method to Integrity Evaluation for Graphite Components in HTGR
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Topics: Graphite, Very high temperature reactors, Stress, Mechanical properties, Tensile strength