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Radiation Damage in Titanate Ceramics for Plutonium Immobilization

  • Denis M. Strachan (a1), Randall D. Scheele (a1), Anne E. Kozelisky (a1), Richard L. Sell (a1), H. Todd Schaef (a1), Matthew J. O'Hara (a1), Christopher F. Brown (a1) and and William C. Buchmiller (a1)...

Abstract

Radiation damage experiments are being performed with pyrochlore and zirconolite in support of the disposition of surplus weapons-ready Pu. Pyrochlore becomes amorphous in approximately 1 year from the alpha recoil damage of ∼ 1018 alphas/g from the decay of 238Pu. The dissolution rate of 238Pu-bearing ceramics increases with increasing radiation damage as measured in a 3 d MCC-1 test at 90°C. Over the same period, zirconolite retains substantial crystallinity albeit with broadened diffraction peaks. The dissolution rate also increases with increasing radiation damage.

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References

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