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Communication Dans Un Congrès Année : 2004

Analysis of accidental sequence tests and interpretation of fission product release: interdependence of Cs, Mo, and Ba release

Résumé

The behaviour of fission products (F.P.) during fuel life in a nuclear reactor is of particular importance as it plays a significant role in the release kinetics during hypothetical reactor severe accident transients. A description of (137 Cs, 99 Mo, 140 Ba) chemical states after some UO2 fuel irradiation stages is drawn. Molybdenum is supposed to be localised in a MoO2 precipitate (volatile over 1273K) and chemical reactions with condensed Cs oxides and/or uranates are possible. According to this description, a coherent interpretation is presented for some accidental sequence tests providing new ideas for release mechanisms of (Cs, Mo, Ba).
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irsn-04294828 , version 1 (20-11-2023)

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  • HAL Id : irsn-04294828 , version 1

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Gregory Nicaise, Roland Dubourg. Analysis of accidental sequence tests and interpretation of fission product release: interdependence of Cs, Mo, and Ba release. 11th Symposium on Thermodynamics of Nuclear Materials, Sep 2004, Karlsruhe, Germany. ⟨irsn-04294828⟩

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