Trans. of KNS Autumn meeting , CD-ROM, 2008.
In our previous work, the library generation procedure employing a consistent subgroup parameter generation procedure was established. Even though the subgroup parameters were generated consistently, however, the resulting library involved about 400-500 pcm lower reactivity then correct one even for a pin cell problem than the reference ones. This work is to sort out the factors that induce such large errors and then to actually reduce the error by suitable measures. Especially we focus on the resonance parameters because it was confirmed that the groupwise XS induces little error by several tests
