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Quantitative X-Ray Diffraction Analysis of Titanate Waste Forms and its Application to Damage Ingrowth

Published online by Cambridge University Press:  01 January 1992

T.J. White and
H. Mitamura
T.J. White
Affiliation:
Electron Microscope Centre, The University of Queensland, Brisbane, Australia, 4067
H. Mitamura
Affiliation:
Department of Environmental Safety Research, Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11, Japan
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Abstract

Quantitative powder X-ray diffraction was used to analyse the phase assemblages of titanate nuclear waste ceramics doped with 244Cm and accumulating a-decay doses up to 1.24 × 1018 alpha-decay-events g−1. Among the Cm-bearing phases, perovskite is more susceptible to damage than zirconolite. Phases devoid of curium (hollandite and freudenbergite) experience a flux of ionizing radiation, and may also undergo radiation-induced structural degradation. The analysis demonstrated that at a dose of 1.24 × 1018 alpha-decay-events g−1 approximately 20 wt% of the waste phases remain aperiodic after annealing for 2 hours at 800°C.

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References

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