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HVEM-Tandem and Eels Study of Radiation Damage in Zirconolite

Published online by Cambridge University Press:  02 July 2020

Katherine L. Smith ,
Nestor J. Zaluzec  and
Gregory R. Lumpkin
Katherine L. Smith
Affiliation:
Materials Div., Aust. Nuclear Sei. & Tech. Org., LMB l, Menai2234, Australia
Nestor J. Zaluzec
Affiliation:
Materials Science Div., Argonne National Laboratory, Argonne, II60439, USA
Gregory R. Lumpkin
Affiliation:
Materials Div., Aust. Nuclear Sei. & Tech. Org., LMB l, Menai2234, Australia
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Extract

Zirconolite (CaZrTi2O7) is the major host phase for actinides in Synroc, a promising waste form for the immobilisation of high-level radioactive waste. The effect of radiation damage on the structure and durability of zirconolite are important to predictive modelling of zirconolite's behaviour in the repository environment and risk assessment.

In this study, radiation damage effects in zirconolite were investigated by irradiating samples with 1.5 MeV Kr+ ions using the HVEM-Tandem at Argonne National Laboratory (ANL) and energy loss electron spectroscopy (EELS). The HVEM-Tandem consists of a modified AEI high votage transmission electron microscope interfaced to to a 2 MV tandem ion accelerator. EELS spectra were collected using a Philips 420 TEM, operated at 120 kV, fitted with a Gatan Model 607 Serial EELS. EELS data were recorded at resolutions of ˜1.0 eV and at a dispersion of about ˜0.25 eV.

Selected area diffraction patterns (SADs) of individual grains of various zirconolites were monitored as a function of dose to establish the critical dose for aniorphisation (Dc).

Type
Geology and Mineralogy
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 773 - 774
Copyright
Copyright © Microscopy Society of America 1997

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References

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The authors thank the HVEM-Tandem Facility staff at ANL for assistance during ion irradiations and partial support by the U.S. DOE, Basic Energy Sciences, under contract W-31-109-ENG-38. The authors thank Peter Fielding (UNE), Lou Vance (ANSTO) and Alan Cuelho (UTS) for making and kindly providing the samples.Google Scholar