Core concept of simultaneous transmutation of six LLFP nuclides using a fast reactor

Toshio Wakabayashi, Makoto Takahashi, Satoshi Chiba, Naoyuki Takaki, Yoshiaki Tachi, Yoshihisa Tahara

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The core concept of simultaneous transmutation of six long-lived fission products (LLFP: 79Se, 93Zr, 99Tc, 107Pd, 129I, and 135Cs) was investigated using MONJU fast reactor by maintaining all 6 LLFP nuclides support ratios at 1 or greater. By loading the six LLFP nuclides with the partial use of moderator into the blanket, the shield, the axial blanket, a part of gas plenum region and the axial shield, the effective half-lives of the LLFP nuclides were greatly reduced while maintaining the support ratios at 1 or greater. A new transmutation system for the six LLFPs based on a fast reactor core was constructed. It was also found that the basic core characteristics of the LLFP loaded core: the sodium void coefficient, Doppler coefficient and power distribution, did not differ greatly from those of normal conventional fast reactors.

Original languageEnglish
Article number110208
JournalNuclear Engineering and Design
Volume352
DOIs
Publication statusPublished - 2019 Oct

Keywords

  • Fast reactor
  • Simultaneous transmutation
  • Six LLFP nuclides
  • Support ratio
  • YD moderator

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Mechanical Engineering

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