Behavior of metallic fission products in uranium-plutonium mixed oxide fuel

I. Sato, H. Furuya, T. Arima, K. Idemitsu, K. Yamamoto

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Metallic fission products, ruthenium, rhodium, technetium, palladium, and molybdenum, exist in irradiated oxide fuels as metallic inclusions. In this work, the radial distributions of metallic inclusion constituents in the fuel specimen irradiated to a peak burnup of 7-13 at.% were observed with an electron probe microanalysis. Palladium concentration is high at the periphery in all the specimens. Molybdenum shows the same tendency for the 13 at.% burnup specimen. These results showed the significant difference between experimental data and calculations with ORIGEN-2 at such high burnups, which suggested that the migration of palladium and molybdenum was controlled mainly by diffusion of gaseous species containing each metal along the fuel temperature gradient.

Original languageEnglish
Pages (from-to)239-247
Number of pages9
JournalJournal of Nuclear Materials
Volume273
Issue number3
DOIs
Publication statusPublished - Aug 1 1999

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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