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The role of volatile fission products in the formation and migration of gas bubbles in the nuclear fuel UO(2) has been investigated. The theoretical model used previously to study the behaviour of inert fission gas bubbles in oxide fuel has been applied in the interpretation of annealing experiments of uranium dioxide implanted with other volatile fission products (Cs, Rb, I and Te). The coalescence of the randomly migrating equilibrium bubbles was considered as a main mechanism defining the development of fission product porosity and swelling. The model predictions are compared with measured bubble size distributions and differences in the behaviour of different fission products are highlighted. The calculated results are applied to discuss important aspects of the formations and the behaviour of fission product filled bubbles in oxide nuclear fuel.

Additional information

Authors: CHKUASELI V F, Institute of Physics and Power Engineering, Obninsk (RU);MATZKE H, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: 13th IUPAC Conference on Chemical Thermodynamics, Clermont-Ferrand (FR), July 17-22, 1994
Availability: Available from (1) as Paper EN 38420 ORA
Record Number: 199411165 / Last updated on: 1994-11-25
Original language: en
Available languages: en
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