Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-29T07:34:14.024Z Has data issue: false hasContentIssue false
  • English
  • Français

Leaching of americium-241, plutonium-238 and matrix elements from perovskite-based ceramics

Published online by Cambridge University Press:  11 February 2011

A. V. Ochkin ,
S. V. Chizhevskaya ,
N. E. Archakova ,
A. O. Merkushkin ,
I. A. Petukhova ,
N. P. Mikhailenko  and
S. V. Stefanovsky
A. V. Ochkin
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya sq. 9, Moscow 125047, RUSSIA
S. V. Chizhevskaya
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya sq. 9, Moscow 125047, RUSSIA
N. E. Archakova
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya sq. 9, Moscow 125047, RUSSIA
A. O. Merkushkin
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya sq. 9, Moscow 125047, RUSSIA
I. A. Petukhova
Affiliation:
D. Mendeleev University of Chemical Technology, Miusskaya sq. 9, Moscow 125047, RUSSIA
N. P. Mikhailenko
Affiliation:
SIA Radon, 7th Rostovskii per. 2/14, Moscow 119121, RUSSIA, [email protected]
S. V. Stefanovsky
Affiliation:
SIA Radon, 7th Rostovskii per. 2/14, Moscow 119121, RUSSIA, [email protected]
Get access

Abstract

Perovskite-based ceramics ABO3 (A = La or Gd; B = Al or Fe) and a pseudobinary system: LaAlO3 + CaZrTi2O7 are promising matrices for immobilization of actinide fraction of HLW. The ceramic samples containing 241Am, 238Pu or 147Pm were prepared by cold pressing in pellets at 100–300 MPa and sintering at 1300–1500 °C. Leach rates of radionuclides and matrix elements (La, Gd, Al and Fe) from powders were measured using Soxhlet unit. Sintered ceramics in the series: LaAl1-xFexO3 were composed of perovskite phase. Ceramics in the compositional series xLaAlO3 + CaZrTi2O7 (0.4 ≤ x ≤ 6) consisted of perovskite, zirconolite, and baddeleyite at x = 0.4 and x = 0.7, and perovskite and baddeleyite at higher x values. Leach rate of radionuclides and matrix elements from all the ceramics were lower than 10-8 g·cm-2·day.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 757: Symposium II – Scientific Basis for Nuclear Waste Management XXVI , 2002 , II3.21
Copyright
Copyright © Materials Research Society 2003

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. Ringwood, A.E.. Kesson, S.E.. Reeve, K.D.. et. al. Synroc. In: Radioactive Waste Forms for the Future. ed. by Lutze, W. and Ewing, R.C.. 1988. pp. 233–334.Google Scholar
2. Ochkin, A.V.. Stefanovsky, S.V.. Rovny, S.I.. Mat. Res. Soc. Symp. Proc. 757 (2003). this volume.Google Scholar
3. Stefanovsky, S.V.. Yudintsev, S.V.. Nikonov, B.S.. et. al‥ Mat. Res. Soc. Symp. Proc. 608, 407 (2000).Google Scholar
4. Chizhevskaya, S.V.. Cherniavskaya, N.E.. Ochkin, A.V.. et. al‥ Mat. Res. Soc. Symp. Proc. 367, 663 (2001).Google Scholar
5. Cherniavskaya, N.E.. Chizhevskaya, S.V.. Ochkin, A.V.. and Stefanovsky, S.V.. Waste Management '02. Proc. Int. Symp. (Tucson. AZ. 2002) CD-ROM. Rep. 308.Google Scholar
6. Properties of Inorganic Compounds (Russ.). Leningrad (Khimiya. 1983).Google Scholar
7. Vance, E.R.. Cassidy, D.J.. Ball, C.J. and Thorogood, G.J.. J. Nucl. Mat. 190, 295 (1992).Google Scholar