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E-MRS 2008 Spring Meeting: Third Symposium N on Nuclear Materials, Strasbourg : France (2008)
Behaviour of helium after implantation in molybdenum
C. Viaud1, S. Maillard1, G. Carlot1, C. Valot1, E. Gilabert2, T. Sauvage3, C. Peaucelle4, N. Moncoffre4

This study deals with the behaviour of helium in a molybdenum liner dedicated to the retention of fission products. More precisely this work contributes to evaluate the release of implanted helium when the gas has precipitated into nanometric bubbles close to the free surface. A simple model dedicated to calculate the helium release in such a condition is presented. The specificity of this model lays on the assumption that the gas is in equilibrium with a simple distribution of growing bubbles. This effort is encouraging since the calculated helium release fits an experimental dataset with a set of parameters in good agreement with the literature.
1 :  CEA
2 :  CNAB - Chimie Nucléaire Analytique et Bio-environnementale
3 :  CEMHTI - Conditions Extrêmes et Matériaux : Haute Température et Irradiation
4 :  IPNL - Institut de Physique Nucléaire de Lyon