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Polygonization or grain subdivision at high damage levels, often referred to as the RIM effect, is gaining increasing importance in studies to extend the lifetime of the nuclear fuel UO(2). Also, recently, the concept of replacing U-238, and hence replacing natural UO(2) by inert matrices for fissile U-235 or Pu-239, or also for transmutation of higher actinides (Np, Am, Cm) is being studied. High energy ion implantation was used to simulate fission damage in both UO(2) and in such matrices (eg Al(2)O(3), MgAl(2)O(4), etc). The energy of implanted ions was varied between 40 keV and 2.6 GeV. Emphasis is given to the search for possible dose rate effects. Results on damage formation in UO(2) exist now for dose rate variations by more than a factor of 1E1O. The implications for the technological application of inert matrix materials is briefly discussed.

Additional information

Authors: MATZKE H, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: 8th International Conference on Radiation Effects in Insulators, Catania (IT), September 11-15, 1995
Availability: Available from (1) as Paper EN 39582 ORA
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