JRP 01-15

Partners

SCK•CEN

CEA

UA

FZD

Contact

Dr. M. Verwerft
SCK•CEN - Reactor Materials Research - Boeretang 200 B-2400 Mol - Belgium
Phone + 32 (0) 14 33 30 48
E-mail e-mail

Structural defects in binary and ternary actinide oxides

Status

 
Terminated - Planned from October 2004 till April 2006

Goals

The goal of this joint research project is to study the relationship between the local environment (coordination) of actinides and the corresponding electronic structure. The main focus lies on:

  • defects in off-stoichiometric actinide oxides;
  • the electronic structure of compounds, in which the actinide metal assumes more than one formal valency (so-called mixed valent compounds).

Expected results

The results of this joint research project will be of a fundamental nature. However, direct applications will concern the behaviour of actinide fuels in-pile and under long term storage conditions. Furthermore, the project is also regarded as a complementary step towards the study of more complex systems (in which foreign atoms are introduced into a host matrix).

Publications

  • Konstantinovic M., Van den Berghe S., Isobe M., Ueda Y..- X-ray photoelectron spectroscopy study of mixed-valence effects and charge fluctuation in NaxV2O5- In: Phys. Rev. B: Condens. Matter Mater. Phys., 72 (2005), p. 125124
  • Freyss M., Crocombette J.P., Petit T..- Point defects in uranium dioxide: ab initio pseudopotential approach in the generalized gradient approximation- In: J. Nucl. Mater., 347:1/2(2005), p. 44-51

Presentations

  • Freyss M., Vergnet N., Petit T..- Ab initio modelling of the behaviour of helium and xenon in nuclear oxide fuels- E-MRS - Nuclear Material Symposium: Strasbourg, France, May 31 - June 3, 2005

Reports