Open Access
ND 2007
Article Number 079
Number of page(s) 4
Section Evaluation of covariance matrices
Published online 17 June 2008
International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07679

Covariance matrices for ENDF/B-VII 235,238U and 239Pu evaluated files in the fast energy range

P. Talou1, 2, T. Kawano1 and P.G. Young1

1  T-16, Nuclear Physics, Los Alamos National Laboratory, USA
2  DEN/DER/SPRC/Laboratoire d'Études de Physique, CEA, France

Published online: 21 May 2008

Covariance matrices for evaluated ENDF/B-VII files of 235,238U and 239Pu are obtained in the fast energy region. Both differential experimental data and theoretical model calculations are used to estimate the uncertainties and correlations associated with the evaluated cross sections. The results are compiled in the ENDF format for covariance matrices, and processed into multi-group files for applications.

© CEA 2008