The nuclear heat utilization systems connected to high-temperature gas-cooled reactors (HTGRs) will be designed on the basis of non-nuclear-grade standards in terms of easier entry for the chemical plant companies and the construction economics of the systems. Therefore, it is necessary that the reactor operations can be continued even if abnormal events occur in the systems. The Japan Atomic Energy Agency has developed a calculation code to evaluate the absorption of thermal-load fluctuations by the reactors when the reactor operations are continued after such events, and has improved the code based on the high-temperature engineering test reactor (HTTR) operating data. However, there were insufficient data on the transient temperature behavior of the metallic components and the graphite core support structures corresponding to the fluctuation of the reactor inlet coolant temperature for further improvement of the code. Thus, nuclear heat supply fluctuation tests with the HTTR were carried out in non-nuclear heating operation to focus on the thermal effect. In the tests, the coolant helium gas temperature was heated to 120°C by the compression heat of the gas circulators in the HTTR, and a sufficiently large fluctuation of 17°C for the reactor inlet coolant was achieved by devising a new test procedure under the ideal condition without the effect of the nuclear power. Then, the temperature responses of the metallic components and the graphite core support structures were investigated. The test results adequately showed as predicted that the temperature responses of the metallic components are faster than those of the graphite blocks, and the mechanism of the thermal-load fluctuation absorption by the metallic components was clarified.
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October 2016
Research Papers
Nuclear Heat Supply Fluctuation Tests by Non-Nuclear Heating With HTTR
Yoshitomo Inaba,
Yoshitomo Inaba
1
Small-Sized HTGR Research and Development Division, HTGR Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: inaba.yoshitomo@jaea.go.jp1Corresponding author.
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Kenji Sekita,
Kenji Sekita
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: sekita.kenji@jaea.go.jp
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Takahiro Nemoto,
Takahiro Nemoto
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: nemoto.takahiro44@jaea.go.jp
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Yuki Honda,
Yuki Honda
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: honda.yuki@jaea.go.jp
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Daisuke Tochio,
Daisuke Tochio
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: tochio.daisuke@jaea.go.jp
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Hiroyuki Sato,
Hiroyuki Sato
Small-Sized HTGR Research and Development Division, HTGR Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: sato.hiroyuki09@jaea.go.jp
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Shigeaki Nakagawa,
Shigeaki Nakagawa
Small-Sized HTGR Research and Development Division, HTGR Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: nakagawa.shigeaki@jaea.go.jp
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Shoji Takada,
Shoji Takada
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: takada.shoji@jaea.go.jp
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Kazuhiro Sawa
Kazuhiro Sawa
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: sawa.kazuhiro@jaea.go.jp
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Yoshitomo Inaba
Small-Sized HTGR Research and Development Division, HTGR Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: inaba.yoshitomo@jaea.go.jp
Kenji Sekita
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: sekita.kenji@jaea.go.jp
Takahiro Nemoto
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: nemoto.takahiro44@jaea.go.jp
Yuki Honda
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: honda.yuki@jaea.go.jp
Daisuke Tochio
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: tochio.daisuke@jaea.go.jp
Hiroyuki Sato
Small-Sized HTGR Research and Development Division, HTGR Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: sato.hiroyuki09@jaea.go.jp
Shigeaki Nakagawa
Small-Sized HTGR Research and Development Division, HTGR Hydrogen and Heat Application Research Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: nakagawa.shigeaki@jaea.go.jp
Shoji Takada
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: takada.shoji@jaea.go.jp
Kazuhiro Sawa
Department of HTTR, Oarai Research and Development Center, Japan Atomic Energy Agency
, 4002 Narita-cho, Oarai-machi, Higashiibaraki-gun, Ibaraki-ken 311-1393
, Japan
e-mail: sawa.kazuhiro@jaea.go.jp
1Corresponding author.
Manuscript received September 25, 2015; final manuscript received July 22, 2016; published online October 12, 2016. Assoc. Editor: Asif Arastu.
ASME J of Nuclear Rad Sci. Oct 2016, 2(4): 041001 (7 pages)
Published Online: October 12, 2016
Article history
Received:
September 25, 2015
Revision Received:
July 22, 2016
Accepted:
July 22, 2016
Citation
Inaba, Y., Sekita, K., Nemoto, T., Honda, Y., Tochio, D., Sato, H., Nakagawa, S., Takada, S., and Sawa, K. (October 12, 2016). "Nuclear Heat Supply Fluctuation Tests by Non-Nuclear Heating With HTTR." ASME. ASME J of Nuclear Rad Sci. October 2016; 2(4): 041001. https://doi.org/10.1115/1.4034320
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