Polished tiles (7x7x2 mm3) of Nd-bearing zirconolite were fabricated and then some were irradiated on both large faces with 3 MeV or 2 MeV Au2+ ions (total fluence of = 1 x 1015 ions/cm2) in order to render the zirconolite amorphous and so simulate displacement damage caused by alpha decay. Both the irradiated and non-irradiated tiles were then subjected to static dissolution tests in 0.01M nitric solution (pH2) at 90 C, for periods of 0-1, 1-7, 7-14 and 14-28 days. It was found that radiation damage did not affect the dissolution rate of zirconolite as indicated by the elemental leach rates of Nd, Ti, Ca and Al. The results of solution analyses are consistent with those obtained from X-ray Photoelectron Spectroscopy (XPS) in that the Ca, Nd, Ti and Al concentrations in the top surface layer (
Revised: November 10, 2005 |
Published: August 20, 2003
Citation
Smith K.L., Z. Zhang, P. McGlinn, D. Attard, H. Li, G.R. Lumpkin, and M. Colella, et al. 2003.The Effect of Radiation Damage on Zirconolite Dissolution. In Scientific Basis for Nuclear Waste Management XXVI, Materials Research Society Symposium Proceedings, edited by RJ Finch and DB Bullen, 757, 289-296, paper no. II6.12. Warrendale, Pennsylvania:Materials Research Society.PNNL-SA-37741.