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Behaviour of CS and I In Zirconia Based Fuel

Published online by Cambridge University Press:  15 February 2011

C. Degueldre ,
M. Pouchon ,
M. Doebli  and
G. Ledergerber
C. Degueldre
Affiliation:
Paul Scherrer Institute, CH-5232-Villigen-PSI, Switzerland
M. Pouchon
Affiliation:
Paul Scherrer Institute, CH-5232-Villigen-PSI, Switzerland
M. Doebli
Affiliation:
Paul Scherrer Institute, CH-5232-Villigen-PSI, Switzerland
G. Ledergerber
Affiliation:
Paul Scherrer Institute, CH-5232-Villigen-PSI, Switzerland
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Abstract

A zirconia based ceramic is foreseen as an inert matrix fuel for burning excess plutonium in light water nuclear reactors. For reactor safety reasons the behaviour of volatile fission products such as cesium and iodine must be studied since a retention of fission products is favourable for licensing the studied inert matrix fuel. In this study, implantation of Cs and I was performed into polycrystalline (Zr0.85, Y0.15)O1.925 samples. The implantation depth was selected on the basis of the ability to observe by Rutherford backscattering spectroscopy (RBS) the behaviour of Cs and I after treatment. With a 1 MeV incident energy, the ions are implanted at a depth of 200 nm as predicted by TRIM. After implantations full quantification of I and Cs concentration profiles was performed by RBS. The implantation profiles are measured as a function of sample temperature during stepwise heating programs. It is interesting to observe retention of Cs and I at relatively high temperature (e.g. for 2 h, below 900 K for Cs and below 1400 K for I). This behaviour is likely to be due to the size and interactions of these species in the zirconia solid solution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 540: Symposium N / Microstructural Processes in Irradiated Materials , 1998 , 337
Copyright
Copyright © Materials Research Society 1999

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