Modelling Fission Gas Bubble Distribution in UO2

Author:

Skorek Richard1,Maillard Serge1,Michel Amélie1,Carlot Gaëlle2,Gilabert Eric3,Jourdan Thomas4

Affiliation:

1. Commissariat à l’Energie Atomique (CEA), DEN, DEC

2. CEA

3. Chimie Nucléaire Analytique and Bio-Environnementale (CNAB)

4. Commissariat à l’Energie Atomique (CEA),

Abstract

The Cluster Dynamics method is assessed for the investigation of fission gas behaviour in a krypton-implanted and annealed UO2sample. The simulation results are then compared to Thermal Desorption Spectroscopy (TDS) data. A release mechanism is proposed: the initial burst is related to krypton migration via an interstitial mechanism, while the second stage of the release process can be accounted for by the diffusion of krypton in a substitutional position. This latter mechanism is compatible with a diffusion coefficient of 4.10-21m²/s.

Publisher

Trans Tech Publications, Ltd.

Subject

Condensed Matter Physics,General Materials Science,Radiation

Reference10 articles.

1. C. Struzik, M. Moyne and J.P. Piron, in: Proc. 1997 Int. Topical Meeting on Light Water Reactor Fuel Performance, Portland, Oregon USA (1997), p.126.

2. G. Kaganas and J. Rest: A physical description of fission product behavior in fuels for advanced power reactors (2007).

3. L. Noirot, in: Nuclear Engineering and Design, Corrected Proof (2011), in press.

4. M.H. Wood: Journal of Nuclear Materials 82 (1979), pp.257-263.

5. J.M. Griesmeyer and N.M. Ghoniem: Journal of Nuclear Materials 80 (1979), pp.88-101.

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