Hostname: page-component-8448b6f56d-gtxcr Total loading time: 0 Render date: 2024-04-24T19:42:35.915Z Has data issue: false hasContentIssue false
  • English
  • Français

A Single Phase ([Nzp]) Ceramic Radioactive Waste Form

Published online by Cambridge University Press:  21 February 2011

Rustum Roy ,
L.J. Yang ,
J. Alamo  and
E.R. Vance
Rustum Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
L.J. Yang
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
J. Alamo
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
E.R. Vance
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA
Get access

Abstract

It has been shown that between 10 and 20% of a simulated PW–4b radwaste composition can be incorporated into a single nhase with the NZP (= ‘MaZr2 P3 o12’) structure. By changing the P/Na and Zr/Na molar ratios (i.e., adjusting the crystal chemical model of where each ion is located in the structure) it has been possible to outline a very ‘forgiving’ compositional regime both at the 10% and the 20% waste loading level within which one obtains one ([NZP]) or two ([NZP] and [monazite]) phases. We have also succeeded in substituting Tio2 for Zro2 in making a TiO2-rich [NTP] waste form analogous to the [NZ]] materials.

Thus we have succeeded in creating monophasic and diphasic ceramic waste forms which can be sintered below 1000° C. Only preliminary leach data have been obtained at 25° and 300°C, and they place this material with good ceramic forms.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 15
Copyright
Copyright © Materials Research Society 1983

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Roy, R., Radioactive Waste Disposal, Vol. 1: The Waste Package (Pergamon Press, New York 1982) pp. 232.Google Scholar
2. Goodenough, J.B., Hong, H.Y.P. and Kafalas, J.A., Mat. Res. Bull. 11, 203 (1976).Google Scholar
3. Alamo, J. and Roy, R., Bull. Amer. Ceram. Soc. 62, in preparation (1982).Google Scholar
4. Roy, R., Vance, E.R. and Alamo, J., Mat. Res. Bull. 17, 585 (1982).Google Scholar
5. Roy, R., J. Amer. Ceram. Soc. 39, 145 (1956).Google Scholar
6. Harrison, D.E., J. Electrochem. Soc. 107, 217 (1961).Google Scholar
7. McCarthy, G.J., White, W.B. and Pfoertsch, D.E., Mat. Res. Bull. 13, 1239 (1978),Google Scholar
8. White, W.B. et al. , Presentation to Alternative Waste Form Peer Review Panel, Atlanta, GA, 8 May 1980.Google Scholar
9. Vance, E.R. and Ahmad, L. (unpublished).Google Scholar