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Differential Scanning Calorimetry of Metamict Pu-Substituted Zirconolite*

Published online by Cambridge University Press:  21 February 2011

Dean E. Peterson  and
Frank W. Clinard Jr
Dean E. Peterson
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, University of California, Los Alamos, NM 87545
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Abstract

Samples of CaPuTi2O7 were prepared by cold pressing and sintering. Plutonium was substituted for zirconium in order to characterize radiation damage effects. The energy stored in a sample which had reached saturation in swelling after storage at ambient temperature was measured with a differential scanning calorimeter. The total energy of 6.6±0.1 cal/g is released over the range 485–715° C. The activation energy of annealing of the damage is 1.22±0.05 eV. The temperature dependence of the rate constant is described by kT= 5.96E4 exp(−1.22/kBT) s−1 where kB and T are the Boltzmann's constant and temperature(K) respectively. A sample stored at 600°C was similarly evaluated and showed no release of stored energy to the precision of the apparatus (±0.1 cal/g). These results are applied to analysis of waste incorporation in Synroc and are correlated with analogous parameters for other materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 465
Copyright
Copyright © Materials Research Society 1983

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Footnotes

*

Work performed under the auspices of the U. S. Deparment of Energy.

References

REFERENCES

1. Ewing, R. C. and Haaker, R. F., The Metamict State: Radiation Damage in Crystalline Phases, Proceedings of the Conf. on High-Level Radioactive Solid Waste Forms, Casey, L. A., ed., NUREG/CP-0005, 651–674 (1979).Google Scholar
2. Ringwood, A. E. in: Safe Disposal of High-Level Nuclear Waste: A New Strategy. (Canberra: Aust. Nat. Univer. Press 1978);.Google Scholar
2a Ringwood, A. E., Kesson, S. E., Ware, N. G., Hibberson, W., and Major, A., Nature 278, 219–223 (1979).CrossRefGoogle Scholar
3. Ringwood, A. E., American Scientist 70, 201–207 (1982).Google Scholar
4. Clinard, F. W. Jr., Hobbs, L. W., Land, C. C., Peterson, D. E., Rohr, D. L. and Roof, R. B., J. Nucl. Mats. 105, 248–256 (1982).CrossRefGoogle Scholar
5. Gray, W. J., Wald, J. W., and Turcotte, R. P., “Radiation Damage Studies Related to Nuclear Waste Forms”, report PNL-4145 (1981).CrossRefGoogle Scholar
6. Clinard, F. W. Jr., Hobbs, L. W., Peterson, D. E., Rohr, D. L. and Roof, R. B. in: Scientific Basis for Nuclear Waste Management Vol. 6, to be published.Google Scholar
7. Rogers, R. N., Anal. Chem. 44(7), 1336–1337 (1972)CrossRefGoogle Scholar
8. Sinclair, W. and Ringwood, A. E., Geochem. J., 15, 229 (1981).CrossRefGoogle Scholar
9. Berman, R. M., Am. Mineralogist 63, 807 (1978).Google Scholar
10. Billington, D. S. and Crawford, J. H. in: Radiation Damage in Metals, (Princeton Uni. Press, Princeton, NJ 1961) p. 112.Google Scholar
11. Dienes, G. J. and Vineyard, G. H. in: Radiation Effects in Solids, Vol. 2 (Interscience Publ., New York, NY 1957) p. 157.Google Scholar
12. Lucci, A., Tamanini, M., Battezzatti, L., and Ventarello, G., J. Th. Anal. 14, 93–97 (1978).CrossRefGoogle Scholar
13. Neubert, T. J. and Lees, R. B., Nucl. Sci. Eng. 2, 748–767 (1957).CrossRefGoogle Scholar
14. Mayer, G., Perio, P., Gigon, J. and Townaric, M., Proc. ist Int. Conf. Peaceful Uses At. Eng 7, 647–653 (1955) United Nations, NY (1956).Google Scholar
15. Nelson, C. M. and Crawford, J. H., J. Phys. Chem. Solids 13, 296–305 (1960).CrossRefGoogle Scholar
16. Brown, W. L. and Fletcher, R. C., Phys. Rev. 92 (3), 591–596 (1953).CrossRefGoogle Scholar
17. Turcotte, R. P. and Chikalla, T. D., Rad. Eff. 19, 99–108 (1973).CrossRefGoogle Scholar
18. Morehead, F. F. and Daniels, F., J. Phys. Chem. 56, 546–548 (1952).CrossRefGoogle Scholar
19. Faessler, A., Zeit. Crist. 104, 81 (1942).Google Scholar
20. Weber, W. J. and Roberts, F. P., “Radiation Effects,” Section 6 of Pacific Northwest Laboratory report PNL-3802, Richland, Wash. (April 1981).Google Scholar
21. Heuer, P. M. and Stolarski, G., cited in Studies in Radiation Effects, Series A, Physical and Chemical, Vol. 1, Dienes, G. J., ed., Gordon and Breach, NY (1966), p. 138.Google Scholar