Actual Operation and Control of High-Temperature Engineering Test Reactor

  • Shigeaki Nakagawa
Part of the An Advanced Course in Nuclear Engineering book series (ACNE)


The high-temperature engineering test reactor (HTTR) (Fig. 10.1) is the first high-temperature gas-cooled reactor in Japan. It first attained criticality in November 1998, and the reactor outlet temperature reached 850°C in December 2001, and 950°C in June 2004, both world firsts.


Reactor Power Secondary Coolant Temperature Control System Primary Coolant Single Operation Mode 
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    Yamashita K et al (2000) Critical test of the high-temperature engineering test reactor (HTTR). J Nucl Sci Technol 42(1):30–42Google Scholar
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    Fujikawa S et al (2002) Power up test of the high-temperature engineering test reactor (HTTR). J Nucl Sci Technol (Japanese Series) 1(4):361–372Google Scholar
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    Fujikawa S et al (2004) Achievement of reactor-outlet coolant temperature of 950 °C in HTTR. J Nucl Sci Technol 41(12):1245–1254CrossRefGoogle Scholar
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    Tachibana Y et al (2003) Plan for first phase of safety demonstration tests of the High Temperature Engineering Test Reactor (HTTR). Nucl Eng Des 224(2):179–197CrossRefGoogle Scholar

Copyright information

© Springer Japan 2013

Authors and Affiliations

  • Shigeaki Nakagawa
    • 1
  1. 1.Japan Atomic Energy AgencyTokai-muraJapan

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