Oxygen potentials, oxygen diffusion coefficients and defect equilibria of nonstoichiometric (U,Pu)O^sub 2±x

Oxygen potential of (U,Pu)O2±x was evaluated based on defect chemistry using an updated experimental data set. The relationship between oxygen partial pressure and deviation x in (U,Pu)O2±x was analyzed, and equilibrium constants of defect formation were determined as functions of Pu content and tem...

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Bibliographic Details
Published inJournal of nuclear materials Vol. 486; p. 424
Main Authors Kato, Masato, Watanabe, Masashi, Matsumoto, Taku, Hirooka, Shun, Akashi, Masatoshi
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier BV 01.04.2017
Subjects
Chemical equilibrium
Constants
Diffusion
Oxygen
Partial pressure
Studies
Temperature
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Summary:Oxygen potential of (U,Pu)O2±x was evaluated based on defect chemistry using an updated experimental data set. The relationship between oxygen partial pressure and deviation x in (U,Pu)O2±x was analyzed, and equilibrium constants of defect formation were determined as functions of Pu content and tem- perature. Brouwer's diagrams were constructed using the determined equilibrium constants, and a relational equation to determine O/M ratio was derived as functions of Of M ratio, Pu content and temperature. In addition, relationship between oxygen potential and oxygen diffusion coefficients were described.
ISSN:0022-3115
1873-4820