  We compute the boundary entropies for the allowed boundary conditions of the
SU(2)-invariant principal chiral model at level k=1. We used the reflection
factors determined in a previous work. As a by-product we obtain some
miscellaneous results such as the ground-state energy for mixed boundary
conditions as well as the degeneracies of the Kondo model in the underscreened
and exactly screened cases. All these computations are in perfect agreement
with known results.
