Investigation to reduce mass of a ultra-light solid reactor for electricity supply in environments without human maintenance

Hiroshi Akie, Akifumi Yamaji, Teruhiko Kugo, Takamichi Iwamura, Kenya Suyama

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    A 500 kg mass solid nuclear reactor concept with 20 wt.% uranium nitride fuel was proposed in the 2009 ICAPP conference for the application to space probe. Critical mass reduction of this solid reactor is studied here in order to obtain reference data for possible power/mass ratio improvement. By considering some possibilities on structural material and fuel material, mass reduction effects of some options are summarized. By replacing stainless steel with low neutron absorbing material, about 100 kg mass reduction is possible. Uranium-233 can reduce the reactor mass to less than half. Despite the small temperature coefficient and the delayed neutron fraction, minor actinide 241Am also showed a good mass reduction effect as a fuel in the fast neutron spectrum system. Highly enriched U thermal neutron spectrum system may be an reasonable option, provided nuclear non-proliferation restriction is cleared.

    Original languageEnglish
    Title of host publication2017 International Congress on Advances in Nuclear Power Plants, ICAPP 2017 - A New Paradigm in Nuclear Power Safety, Proceedings
    PublisherInternational Congress on Advances in Nuclear Power Plants, ICAPP
    ISBN (Electronic)9784890471676
    Publication statusPublished - 2017 Jan 1
    Event2017 International Congress on Advances in Nuclear Power Plants: A New Paradigm in Nuclear Power Safety, ICAPP 2017 - Fukui and Kyoto, Japan
    Duration: 2017 Apr 242017 Apr 28

    Other

    Other2017 International Congress on Advances in Nuclear Power Plants: A New Paradigm in Nuclear Power Safety, ICAPP 2017
    CountryJapan
    CityFukui and Kyoto
    Period17/4/2417/4/28

    ASJC Scopus subject areas

    • Energy Engineering and Power Technology
    • Nuclear Energy and Engineering

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  • Cite this

    Akie, H., Yamaji, A., Kugo, T., Iwamura, T., & Suyama, K. (2017). Investigation to reduce mass of a ultra-light solid reactor for electricity supply in environments without human maintenance. In 2017 International Congress on Advances in Nuclear Power Plants, ICAPP 2017 - A New Paradigm in Nuclear Power Safety, Proceedings International Congress on Advances in Nuclear Power Plants, ICAPP.