A 'Burn and Bury' Option for the Destruction and Disposal of plutonium Using a Cubic Zirconia Matrix as both Fuel-Form and Waste-Form
Cubic-stabilized zirconia (ZrO(2) doped with, for instance, MgO, CaO Y(2)O(3) ) is a fluorite-structure oxide that exhibits high chemical stability and durability. It is an actinide-host phase in which actinides have high solubility ( over 10 wt.% for uranium and plutonium). In fact, cubic zirconia is isostructural with actinide oxides such as urania (UO(2)), plutonia (PuO(2)) and thoria (ThO(2)). Cubic zirconia exhibits good radiation damage resistance and so it is attractive as an actinide-bearing nuclear fuel-form and as an actinide-host waste-form. We propose that cubic zirconia be used as a material to assist with the dispositioning of the global surplas plutonium inventory in a cubic zirconia matrix and destroyed by burning in an existing light-water reactou and then buried in a geologic repository (perhaps without further processing); alternatively, the plutonium-bearing zirconia can be sent directly to a repository.
Bibliographic Reference: Article: American Ceramic Society Bulletin, 1998
Record Number: 199910346 / Last updated on: 1999-03-12
Original language: en
Available languages: en