Hiroaki Sawahata - My portal

Profile Information

Affiliation: Japan Atomic Energy Agency

J-GLOBAL ID: 202101011371974321
researchmap Member ID: R000017545

Research Areas

Energy / Nuclear engineering /

Papers

Improving the safety of the high temperature gas-cooled reactor "HTTR" based on Japan's new regulatory requirements

Hamamoto Shimpei, Shimizu Atsushi, Inoi Hiroyuki, Tochio Daisuke, Homma Fumitaka, Sawahata Hiroaki, Sekita Kenji, Watanabe Shuji, Furusawa Takayuki, Iigaki Kazuhiko …

Nuclear Engineering and Design, 388 111642\_1-111642\_11, Mar, 2022 Peer-reviewed
Design of a portable backup shutdown system for the high temperature gas cooled reactor

Hamamoto Shimpei, Ho H. Q., Iigaki Kazuhiko, Goto Minoru, Shimazaki Yosuke, Sawahata Hiroaki, Ishitsuka Etsuo

Nuclear Engineering and Design, 386 111564\_1-111564\_8, Jan, 2022 Peer-reviewed
Comprehensive seismic evaluation of HTTR against the 2011 off the Pacific coast of Tohoku Earthquake

Ono Masato, Iigaki Kazuhiko, Sawahata Hiroaki, Shimazaki Yosuke, Shimizu Atsushi, Inoi Hiroyuki, Kondo Toshinari, Kojima Keidai, Takada Shoji, Sawa Kazuhiro

Journal of Nuclear Engineering and Radiation Science, 4(2) 020906\_1-020906\_8, Apr, 2018 Peer-reviewed
Temperature measurement of control rod using melt wire in High-Temperature Engineering Test Reactor (HTTR)

Hamamoto Shimpei, Tochio Daisuke, Ishii Toshiaki, Sawahata Hiroaki

Nihon Genshiryoku Gakkai Wabun Rombunshi, 16(4) 169-172, Dec, 2017 Peer-reviewed
Measurement of temperature response of intermediate heat exchanger in heat application system abnormal simulating test using HTTR

Ono Masato, Fujiwara Yusuke, Honda Yuki, Sato Hiroyuki, Shimazaki Yosuke, Tochio Daisuke, Homma Fumitaka, Sawahata Hiroaki, Iigaki Kazuhiko, Takada Shoji

Proceedings of 2017 International Congress on Advances in Nuclear Power Plants (ICAPP 2017) (CD-ROM), 5, Apr, 2017 Peer-reviewed
Improvement of neutron startup source handling work by developing new transportation container for High-Temperature engineering Test Reactor (HTTR)

Shimazaki Yosuke, Sawahata Hiroaki, Shinohara Masanori, Yanagida Yoshinori, Kawamoto Taiki, Takada Shoji

Journal of Nuclear Science and Technology, 54(2) 260-266, Feb, 2017 Peer-reviewed
Investigation of absorption characteristics for thermal-load fluctuation using HTTR

Tochio Daisuke, Honda Yuki, Sato Hiroyuki, Sekita Kenji, Homma Fumitaka, Sawahata Hiroaki, Takada Shoji, Nakagawa Shigeaki

Journal of Nuclear Science and Technology, 54(1) 13-21, Jan, 2017 Peer-reviewed
Study on sensitivity of control rod cell model in reflector region of high-temperature engineering test reactor

Honda Yuki, Fujimoto Nozomu*, Sawahata Hiroaki, Takada Shoji, Sawa Kazuhiro

Journal of Nuclear Engineering and Radiation Science, 3(1) 011005\_1-011005\_6, Jan, 2017 Peer-reviewed
Burn-up dependency of control rod position at zero-power criticality in the high-temperature engineering test reactor

Honda Yuki, Fujimoto Nozomu*, Sawahata Hiroaki, Takada Shoji, Sawa Kazuhiro

Journal of Nuclear Engineering and Radiation Science, 3(1) 011013\_1-011013\_4, Jan, 2017 Peer-reviewed
Development of the prediction technology of cable disconnection of in-core neutron detector for the future high-temperature gas-cooled reactors

Shimazaki Yosuke, Sawahata Hiroaki, Kawamoto Taiki, Suzuki Hisashi, Shinohara Masanori, Honda Yuki, Katsuyama Kozo, Takada Shoji, Sawa Kazuhiro

Journal of Nuclear Engineering and Radiation Science, 2(4) 041008\_1-041008\_5, Oct, 2016 Peer-reviewed
Improvement of exchanging method of neutron startup source of high temperature engineering test reactor

Sawahata Hiroaki, Shimazaki Yosuke, Ishitsuka Etsuo, Yamazaki Kazunori, Yanagida Yoshinori, Fujiwara Yusuke, Takada Shoji, Shinozaki Masayuki, Hamamoto Shimpei, Tochio Daisuke

Proceedings of 24th International Conference on Nuclear Engineering (ICONE-24) (DVD-ROM), 8, Jun, 2016 Peer-reviewed
Establishment of integrity evaluation method for Reserved Shutdown System of High-Temperature engineering Test Reactor (HTTR)

Hamamoto Shimpei, Kawamoto Taiki, Kondo Makoto, Sawahata Hiroaki, Takada Shoji, Shinozaki Masayuki

Nihon Genshiryoku Gakkai Wabun Rombunshi, 15(2) 66-69, Jun, 2016 Peer-reviewed
Development of the prediction technology of cable disconnection of in-core neutron detector for the future high-temperature gas cooled reactors

Shimazaki Yosuke, Sawahata Hiroaki, Kawamoto Taiki, Suzuki Hisashi, Shinohara Masanori, Honda Yuki, Katsuyama Kozo, Takada Shoji, Sawa Kazuhiro

Proceedings of 23rd International Conference on Nuclear Engineering (ICONE-23) (DVD-ROM), 7, May, 2015 Peer-reviewed
Improvement of cell model for control rod in reflector region of high temperature test engineering reactor

Honda Yuki, Fujimoto Nozomu, Sawahata Hiroaki, Sawa Kazuhiro

Proceedings of 23rd International Conference on Nuclear Engineering (ICONE-23) (DVD-ROM), 6, May, 2015 Peer-reviewed
Burn-up dependency of control rod position at zero power criticality in the high temperature test engineering reactor

Honda Yuki, Fujimoto Nozomu, Sawahata Hiroaki, Sawa Kazuhiro

Proceedings of 23rd International Conference on Nuclear Engineering (ICONE-23) (DVD-ROM), 5, May, 2015 Peer-reviewed
Development of the maintenance technologies for the future high-temperature gas cooled reactor (HTGR) using operating experiences acquired in high-temperature engineering test reactor (HTTR)

Shimazaki Yosuke, Homma Fumitaka, Sawahata Hiroaki, Furusawa Takayuki, Kondo Masaaki

Journal of Nuclear Science and Technology, 51(11-12) 1413-1426, Nov, 2014 Peer-reviewed
Development of operation and maintenance technology for HTGRs by using HTTR (High Temperature engineering Test Reactor)

Shimizu Atsushi, Kawamoto Taiki, Tochio Daisuke, Saito Kenji, Sawahata Hiroaki, Homma Fumitaka, Furusawa Takayuki, Saikusa Akio, Takada Shoji, Shinozaki Masayuki

Nuclear Engineering and Design, 271 499-504, May, 2014 Peer-reviewed
Development of operation and maintenance technology of HTTR (High Temperature engineering Test Reactor)

Shimizu Atsushi, Kawamoto Taiki, Tochio Daisuke, Saito Kenji, Sawahata Hiroaki, Homma Fumitaka, Furusawa Takayuki, Saikusa Akio, Shinozaki Masayuki

Proceedings of 6th International Topical Meeting on High Temperature Reactor Technology (HTR 2012) (USB Flash Drive), 8, Oct, 2012 Peer-reviewed
Reactivity control system of the high temperature engineering test reactor

Tachibana Yukio, Sawahata Hiroaki, Iyoku Tatsuo, Nakazawa Toshio

Nuclear Engineering and Design, 233(1-3) 89-101, Oct, 2004 Peer-reviewed

Misc.

High temperature gas-cooled reactors

Takeda Tetsuaki*, Inagaki Yoshiyuki, Aihara Jun, Aoki Takeshi, Fujiwara Yusuke, Fukaya Yuji, Goto Minoru, Ho H. Q., Iigaki Kazuhiko, Imai Yoshiyuki …

High Temperature Gas-Cooled Reactors; JSME Series in Thermal and Nuclear Power Generation, Vol.5, 464, Feb, 2021
Development of temperature measurement technology for control rod using melt wire in High Temperature engineering Test Reactor (HTTR)

Hamamoto Shimpei, Sawahata Hiroaki, Suzuki Hisashi, Ishii Toshiaki, Yanagida Yoshinori

JAEA-Technology 2017-012, 20, Jun, 2017
Development of transportation container for neutron startup source of High Temperature Engineering Test Reactor (HTTR)

Shimazaki Yosuke, Sawahata Hiroaki, Yanagida Yoshinori, Shinohara Masanori, Kawamoto Taiki, Takada Shoji

JAEA-Technology 2016-038, 36, Feb, 2017
Shielding calculation by PHITS code during replacement works of startup neutron sources for HTTR operation

Shinohara Masanori, Ishitsuka Etsuo, Shimazaki Yosuke, Sawahata Hiroaki

JAEA-Technology 2016-033, 65, Jan, 2017
HTTR thermal load fluctuation test (non-nuclear heating test); Confirmation of HTGR system response against temperature transient

Honda Yuki, Tochio Daisuke, Nakagawa Shigeaki, Sekita Kenji, Homma Fumitaka, Sawahata Hiroaki, Sato Hiroyuki, Sakaba Nariaki, Takada Shoji

JAEA-Technology 2016-016, 16, Aug, 2016
Development of transportation container for the neutron startup source of High Temperature engineering Test Reactor (HTTR)

Shimazaki Yosuke, Ono Masato, Tochio Daisuke, Takada Shoji, Sawahata Hiroaki, Kawamoto Taiki, Hamamoto Shimpei, Shinohara Masanori

Proceedings of International Topical Meeting on Research Reactor Fuel Management and Meeting of the International Group on Reactor Research (RRFM/IGORR 2016) (Internet), 1034-1042, Mar, 2016
Investigation on cause of outage of Wide Range Monitor (WRM) in High Temperature engineering Test Reactor (HTTR); Transport operation toward investigation for cause of outage

Shinohara Masanori, Sawahata Hiroaki, Kawamoto Taiki, Motegi Toshihiro, Saito Kenji, Takada Shoji, Yoshida Naoaki, Isozaki Ryosuke, Katsuyama Kozo

JAEA-Technology 2012-025, 31, Aug, 2012
The Approaches of safety design and safety evaluation at HTTR (High Temperature Engineering Test Reactor)

Iigaki Kazuhiko, Saikusa Akio, Sawahata Hiroaki, Shinozaki Masayuki, Tochio Daisuke, Homma Fumitaka, Tachibana Yukio, Iyoku Tatsuo, Kawasaki Kozo, Baba Osamu*

JAEA-Review 2006-010, 90, Jul, 2006
Test results of HTTR control system

Motegi Toshihiro, Iigaki Kazuhiko, Saito Kenji, Sawahata Hiroaki, Hirato Yoji, Kondo Makoto, Shibutani Hideki, Ogawa Satoru, Shinozaki Masayuki, Mizushima Toshihiko …

JAEA-Technology 2006-029, 67, Jun, 2006
Report of investigation on malfunction of reserved shutdown system in HTTR

Hamamoto Shimpei, Iigaki Kazuhiko, Shimizu Atsushi, Sawahata Hiroaki, Kondo Makoto, Oyama Sunao, Kawano Shuichi, Kobayashi Shoichi, Kawamoto Taiki, Suzuki Hisashi …

JAEA-Technology 2006-030, 58, Mar, 2006
Investigation of automatic shutdown of HTTR on May 21st, 2003

Hirato Yoji, Saito Kenji, Kondo Makoto, Sawahata Hiroaki, Motegi Toshihiro, Tsuchiyama Masaru*, Ando Toshio*, Mizushima Toshihiko, Nakazawa Toshio

JAERI-Tech 2004-037, 33, Apr, 2004
Test results of the reactor inlet coolant temperature control system of HTTR

Saito Kenji, Nakagawa Shigeaki, Hirato Yoji, Kondo Makoto, Sawahata Hiroaki, Tsuchiyama Masaru*, Ando Toshio*, Motegi Toshihiro, Mizushima Toshihiko, Nakazawa Toshio

JAERI-Tech 2004-042, 26, Apr, 2004
Control rod position and temperature coefficients in HTTR power-rise tests; Interim report

Fujimoto Nozomu, Nojiri Naoki, Takada Eiji*, Saito Kenji, Kobayashi Shoichi, Sawahata Hiroaki, Kokusen Shigeru

JAERI-Tech 2000-091, 49, Mar, 2001
Counter-measure to prevent temperature rise of stand pipe and primary upper shielding in HTTR

Kunitomi Kazuhiko, Tachibana Yukio, *, Nakano Masaaki*, Saikusa Akio, Takeda Takeshi, Iyoku Tatsuo, Sawahata Hiroaki, Tanaka Toshiyuki

JAERI-Tech 97-040, 91, Sep, 1997

Presentations

Temperature measurement inside reactor vessel using melt wire in High Temperature Gas-cooled Reactor

Hamamoto Shimpei, Sawahata Hiroaki, Suzuki Hisashi, Ishii Toshiaki, Yanagida Yoshinori

平成28年度弥生研究会「研究炉等の運転・管理及び改良に関する研究会」
Improvement of neutron startup source (NS) handling work by developing a new transportation container for the NS of High Temperature Engineering Test Reactor (HTTR)

Shimazaki Yosuke, Sawahata Hiroaki, Yanagida Yoshinori, Shinohara Masanori, Kawamoto Taiki, Takada Shoji

平成28年度日本原子力学会北関東支部若手研究者発表会
Development of new transportation container for neutron startup source of High Temperature Engineering Test Reactor

Shimazaki Yosuke, Sawahata Hiroaki, Yanagida Yoshinori, Shinohara Masanori, Kawamoto Taiki, Takada Shoji

平成27年度弥生研究会「研究炉等の運転・管理及び改良に関する研究会」
The Countermeasures of SBO by taking account of HTTR characteristics

Kondo Makoto, Homma Fumitaka, Sawahata Hiroaki, Hirato Yoji, Kawamoto Taiki, Suzuki Hisashi, Ono Masato

平成26年度弥生研究会「研究炉等の運転・管理及び改良に関する研究会」
Investigation on candidates of principal facilities for exposure dose to public for the facilities using nuclear material

Shimazaki Yosuke, Sawahata Hiroaki, Takada Shoji, Fujimoto Nozomu

平成26年度弥生研究会「研究炉等の運転・管理及び改良に関する研究会」
Development of operation and maintenance technique with long term high temperature operation in HTTR, 2; Operation and maintenance of facilities and equipments unique for HTGRs

Shimizu Atsushi, Kawamoto Taiki, Tochio Daisuke, Homma Fumitaka, Sawahata Hiroaki, Furusawa Takayuki

平成22年度弥生研究会「研究炉等の運転・管理及び改良に関する研究会」
Completion of long term high temperature operation of HTTR (High Temperature Engineering Test Reactor), 5; Operation and maintenance

Shimizu Atsushi, Kawamoto Taiki, Tochio Daisuke, Homma Fumitaka, Sawahata Hiroaki, Furusawa Takayuki

日本原子力学会2010年秋の大会
Development of preservation technology for high temperature gas-cooled reactor

Furusawa Takayuki, Homma Fumitaka, Inoi Hiroyuki, Sawahata Hiroaki, Nemoto Takahiro, Watanabe Shuji, Ota Yukimaru

日本保全学会第5回学術講演会