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Synroc Derivatives for the Hanford Waste RemediationTask

Published online by Cambridge University Press:  03 September 2012

E. R. Vance ,
K. P. Hart ,
R. A. Day ,
M. L. Carter ,
M. Hambley ,
M. G. Blackford  and
B. D. Begg
E. R. Vance
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia fax 61–2–9534–7179, phone 61–2–9717–3019, email erv@nucleus.ansto.gov.au
K. P. Hart
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia fax 61–2–9534–7179, phone 61–2–9717–3019, email erv@nucleus.ansto.gov.au
R. A. Day
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia fax 61–2–9534–7179, phone 61–2–9717–3019, email erv@nucleus.ansto.gov.au
M. L. Carter
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia fax 61–2–9534–7179, phone 61–2–9717–3019, email erv@nucleus.ansto.gov.au
M. Hambley
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia fax 61–2–9534–7179, phone 61–2–9717–3019, email erv@nucleus.ansto.gov.au
M. G. Blackford
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia fax 61–2–9534–7179, phone 61–2–9717–3019, email erv@nucleus.ansto.gov.au
B. D. Begg
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australia fax 61–2–9534–7179, phone 61–2–9717–3019, email erv@nucleus.ansto.gov.au
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Abstract

Three wt% each of Cs and Tc were mixed with the standard Synroc precursorand the ceramic was formed by hot-pressing. Attempts were made toincorporate the Tc as either metal or Tc 4+, using differentredox conditions in processing. Volatile losses of Tc during calcinationwere < 0.1% in all cases. Short-term Tc leach rates when the Tc waspresent as a metal alloy were in the order of 10−4 g/m /d at 90°Cwith frequently changed water, and decreased with increasing leaching time.The valence of the Tc was monitored by X-ray absorption spectroscopy at thedrying and calcination stages of the production. The general viability ofSynroc/glass composites for immobilising the Hanford HLW sludges is furtherdemonstrated by using further refinements of additive schemes for theinactive “All-blend” formulation and initial studies using the U-containing“All-blend” waste formulation.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 341
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

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