Fast Reactor Core Concepts for Minor Actinide Transmutation Using Hydride Fuel Targets

Toshio Sanda, Koji Fujimura, Kaoru Kobayashi, Katsuyuki Kawashima, Michio Yamawaki, Kenji Konashi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Fast reactor core concepts are studied which reducelong-term radiotoxicity of nuclear waste by using minor actinides (MAs) in the form of zirconium-hydride fuel targets. Asystematic parameter survey is carried out to investigate the fundamental characteristics of MA transmutation and the core safety parameters such as sodium void reactivity in a 1,000 MWe-class fast reactor core. Two core concepts are proposed, using 36 target assemblies, by adjusting the compositionof hydride fuels. One is the MA burner core to transmute alarge amount of MAs in a short time combined with Pu multi-recycling in fast reactors, whereby the MAs produced in about 13 LWRs can be transmuted every year with a 58% MA transmutation rate in discharged targets. The other is the MA once-through core to incinerate a small amount of MAs by fission, whereby the MAs produced in about 2 LWRs can be incinerated every year with a 64% MA incineration rate (a 93% transmutation rate) in discharged targets. This study shows these concepts have great potential to achieve good transmutation characteristics of MAs while providing the improved safety characteristics of a fast reactor core.

Original languageEnglish
Pages (from-to)335-343
Number of pages9
Journaljournal of nuclear science and technology
Issue number4
Publication statusPublished - 2000 Jan 1


  • Fast reactor
  • Hydride fuels
  • Long-term radiotoxicity
  • MA
  • MA burner
  • MA incineration
  • MA transmutation
  • Plutonium recycle
  • Reactor core
  • Target assemblies
  • Zirconium hydride

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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