Self-radiation damage in actinide host phases of nuclear waste forms. [Ca/sub 2/Nd/sub 8/(SiO/sub 4/)/sub 6/O/sub 2/; Gd/sub 2/Ti/sub 2/O/sub 7/; CaZrTi/sub 2/O/sub 7/]
Three crystalline ceramic materials (Ca/sub 2/Nd/sub 8/(SiO/sub 4/)/sub 6/O/sub 2/, Gd/sub 2/Ti/sub 2/O/sub 7/, CaZrTi/sub 2/O/sub 7/), which occur as host phases for the long-lived actinides in many nuclear waste formulations, were doped with Cm-244, and the effects of self-radiation damage from alpha decay on microstructure and physical properties were investigated. The irradiation-induced microstructure consisted of individual amorphous tracks from both the alpha-recoil particles and the spontaneous fission fragments. The eventual overlap of the tracks at higher doses leads to a completely amorphous state. This radiation-induced amorphization process results in measured increases in volume, leachability, and stored energy. Thermal recovery of the radiation-induced swelling and amorphization occurs with full recrystallization to the initial structures.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA); Commission of the European Communities, Karlsruhe (Germany, F.R.). European Inst. for Transuranium Elements
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6260154
- Report Number(s):
- PNL-SA-12314; CONF-841157-42; ON: DE85004555
- Resource Relation:
- Conference: Symposium on the scientific basis for nuclear waste management, Boston, MA, USA, 26 Nov 1984
- Country of Publication:
- United States
- Language:
- English
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Self-radiation damage in actinide host phases of nuclear waste forms
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Related Subjects
36 MATERIALS SCIENCE
CERAMICS
PHYSICAL RADIATION EFFECTS
GADOLINIUM COMPOUNDS
NEODYMIUM COMPOUNDS
SILICATES
TITANATES
ZIRCONATES
ZIRCONIUM COMPOUNDS
ALPHA DECAY
AMORPHOUS STATE
CURIUM 244
MICROSTRUCTURE
PARTICLE TRACKS
SELF-IRRADIATION
SWELLING
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
CRYSTAL STRUCTURE
CURIUM ISOTOPES
DECAY
EVEN-EVEN NUCLEI
HEAVY NUCLEI
IRRADIATION
ISOTOPES
NUCLEI
OXYGEN COMPOUNDS
RADIATION EFFECTS
RADIOISOTOPES
RARE EARTH COMPOUNDS
SILICON COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YEARS LIVING RADIOISOTOPES
052000* - Nuclear Fuels- Waste Management
360206 - Ceramics
Cermets
& Refractories- Radiation Effects