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Synthesis and Study of 239Pu-Doped Gadolinium-Aluminum Garnet

Published online by Cambridge University Press:  10 February 2011

B.E. Burakov ,
E.E. Anderson ,
M.V. Zamoryanskaya  and
M.A. Petrova
B.E. Burakov
Affiliation:
V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, fax: (7)-(812)-346-1129 e-mail: [email protected]
E.E. Anderson
Affiliation:
V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, fax: (7)-(812)-346-1129
M.V. Zamoryanskaya
Affiliation:
V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, fax: (7)-(812)-346-1129
M.A. Petrova
Affiliation:
V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, fax: (7)-(812)-346-1129
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Abstract

Garnet solid solutions, Y3A15O12-Gd3A15O12-Gd3Ga5O12 (YAG-GAG-GGG), are being considered as prospective durable host phases for the immobilization of actinide-containing waste with complex chemical compositions. Garnet samples with the suggested simplified formula: (Gd,Ce…)3(Al,Ga,Pu,…)5O12 containing from 3.4 to 5.3 wt.% 239Pu and 3.6-5.5 wt.% Ce have been synthesized through melting of oxide starting materials in air using a hydrogen torch. Calcium and Sn were added to increase the Pu incorporation into the garnet lattice through ion charge and size compensation for Pu4+. Polycrystalline materials obtained in the experiments consist of garnet, perovskite and other phases and were studied by scanning electron microscopy (SEM) and powder X-ray diffraction (XRD). Our results confirmed that the use of compensating elements such as Ca and Sn allow for significant incorporation of Pu and Ce (not less than a few wt.%) into the garnet structure. The preliminary conclusions thus so far indicate that garnet solid solution compositions may incorporate simultaneously trivalent and tetravalent actinides in significant quantities because they occupy different positions in the garnet structure

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 608: Symposium QQ – Scientific Basis for Nuclear Waste Management XXIII , 1999 , 419
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

1 Burakov, B.E., Strykanova, E.E., Proceedings of International Symposium Waste Management-98, CD-ROM version, sess34 - 05, (1998).Google Scholar
2 Burakov, B.E., Anderson, E.B., Knecht, D.A., in Environmental Issues and Waste Management Technologies IV, 349–356 (1999).Google Scholar
3 Burakov, B.E., Anderson, E.B., Knecht, D.A., Zamoryanskaya, M.V., Strykanova, E.E., Yagovkina, M.V., Mat. Res. Soc. Symp. Proc. Proceedings Scientific Basis for Nuclear Waste Management XXII, (1999) in press.Google Scholar
4 Burakov, B.E., Anderson, E.B., Proceedings of the 2nd NUCEF International Symposium NUCEF'98, 16-17/11/98, Hitachinaka, Ibaraki, Japan, JAERI-Conf.99-004 (Part I), 295–306 (1998).Google Scholar