Development of hydride absorber for fast reactor - Application of hafnium hydride to control rod of large fast reactor

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15 Citations (Scopus)

Abstract

The application of hafnium hydride (Hf-hydride) to a control rod for a large fast reactor where the B4C control rod is originally employed is studied. Three types of Hf-hydride control rods are designed. The control rod worth and its change during the burnup are evaluated for different hydrogen-to-hafnium ratios and are compared with those of the original B 4C control rod. The result indicates that the worths of the Hf- hydride and the 10B-enriched B4C control rods are approximately the same, and the lifetime of the Hf- hydride control rod is almost four times longer than that of the 10B-enriched B4C control rod. The core performances of the shutdown margin, sodium void reactivity, Doppler reactivity coefficient, and breeding ratio are analyzed. It is indicated that those for the Hf-hydride control rod are almost the same as those for the original B4C control rod. The behavior of neutrons moderated by the Hf-hydride control rod is analyzed. It is confirmed that the Hf-hydride control rod does not cause any thermal spike problems in the fast reactor core.

Original languageEnglish
Pages (from-to)874-882
Number of pages9
Journaljournal of nuclear science and technology
Volume46
Issue number8
DOIs
Publication statusPublished - 2009

Keywords

  • B4C
  • Control rod
  • Fast reactor
  • Hf
  • Hydride
  • Long life
  • Monte carlo method
  • Rod worth

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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