  Using the code AUTOSTRUCTURE, extensive calculations of inner-shell atomic
data have been made for the chemical elements He, C, N, O, Ne, Na, Mg, Al, Si,
S, Ar, Ca, Cr, Mn, Fe and Ni. The results are used to obtain up-dated opacities
from the Opacity Project, OP. A number of other improvements on earlier work
have also been included.
  Rosseland-mean opacities from OP are compared with those from OPAL.
Differences of 5 to 10% occur. OP gives the `Z-bump', at log(T)=5.2, to be
shifted to slightly higher temperatures. The opacities from OP, as functions of
temperature and density, are smoother than those from OPAL. Extensive tests
show that the numerical accuracy of the OP opacities following integration over
frequency mesh and interpolation on temperature-density mesh is better than 1%.
  Prior to a number of recent investigations which have indicated a need for a
downward revision in the solar abundances of oxygen and other elements, there
was good agreement between properties of the sun deduced from helioseismology
and from stellar evolution models calculated using OPAL opacities. The
revisions in abundances destroy that agreement. In a recent paper Bahcall et al
argue that the agreement would be restored if opacities for the regions of the
sun between 0.7 and 0.4 solar radii were larger than those given by OPAL by
about 10%. In the region concerned, the present results from OP do not differ
from those of OPAL by more than 2.5%.
