  The CUORE Crystal Validation Runs (CCVRs) have been carried out since the end
of 2008 at the Gran Sasso National Laboratories, in order to test the
performances and the radiopurity of the TeO$_2$ crystals produced at SICCAS
(Shanghai Institute of Ceramics, Chinese Academy of Sciences) for the CUORE
experiment. In this work the results of the first 5 validation runs are
presented. Results have been obtained for bulk contaminations and surface
contaminations from several nuclides. An extrapolation to the CUORE background
has been performed.
