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Infiltration of metal nitrate solutions into porous pellets, followed by thermal conversion of the nitrate to oxide and sintering of the pellets provides an alternative procedure for the fabrication of targets for the transmutation and incineration of actinides and fission products. The infiltration rate of metal (Ce and Pu) nitrate solutions into porous spinel (MgAl(2)O(4)) pellets depends on the viscosity of the solution, while the infiltrant content depends on the solution concentration and the pellet porosity. The infiltration depth is proportional to the square root of the time and the pellet is immersed in the solution. Tailored distributions of the infiltrant can be achieved either by selecting the immersion time, or by applying an impenetrable coating on selected regions of the pellet surface.

Additional information

Authors: FERNANDEZ A, JRC Karlsruhe (DE);RICHTER K, JRC Karlsruhe (DE);SOMERS J, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: Actinides '97, Baden-Baden (DE), 21-26 September 1997
Availability: Available from (1) as Paper EN 41188 ORA
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