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Synroc Derivatives for the Hanford Waste Remediation Task

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, Australiafax61–2–9534–7179, phone61–2–9717–3019, [email protected]
K. P. Hart
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australiafax61–2–9534–7179, phone61–2–9717–3019, [email protected]
R. A. Day
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australiafax61–2–9534–7179, phone61–2–9717–3019, [email protected]
M. L. Carter
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australiafax61–2–9534–7179, phone61–2–9717–3019, [email protected]
M. Hambley
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australiafax61–2–9534–7179, phone61–2–9717–3019, [email protected]
M. G. Blackford
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australiafax61–2–9534–7179, phone61–2–9717–3019, [email protected]
B. D. Begg
Affiliation:
Australian Nuclear Science and Technology Organisation, Menai, NSW 2234, Australiafax61–2–9534–7179, phone61–2–9717–3019, [email protected]
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Abstract

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

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

1. Vance, E. R., Carter, M. L., Day, R. A. and Jostsons, A., A Melting route to Synroc for Hanford HLW Immobilization, in Scientific Basis for Nuclear Waste Management XIX, Eds. Murphy, W. M. and Knecht, D. A., Materials Research Society, Pittsburgh, PA, USA, p. 289–96 (1996).Google Scholar
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