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Abstract

Three crystalline ceramic materials, which occur as host phases for the long-lived actinides in many nuclear waste formulations, were doped with 244-Cm, and the effects of self-radiation damage from alpha decay on microstructure and physical properties were investigated. The irradiation induced microstructure consists of individual amorphous tracks from both the alpha recoil particles and the spontaneous fission fragments. The overlap of the tracks at higher doses leads to a completely amorphous state at a cumulative dose of 1.3- 2.3x10**25 alpha decays/m**3. This radiation induced amorphization process results in a stored energy of about 128 j/g, 5-10% swelling, factor of 10-50 increase in leachability, and an increase in fracture toughness.

Additional information

Authors: WEBER W J PACIFIC NORTHWEST LABORATORY, RICHLAND, WASHINGTON (USA) MATZKE HJ JRC KARLSRUHE ESTAB. (GERMANY) , PACIFIC NORTHWEST LABORATORY, RICHLAND, WASHINGTON (USA);JRC KARLSRUHE ESTAB. (GERMANY)
Bibliographic Reference: RADIATION EFFECTS IN INSULATORS CONFERENCE, UNIVERSITY OF SURREY, GUILDFORD (UK), JULY 15-19, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32184 ORA
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