VITJEFF32.BOLIB - An ENEA-Bologna Fine-Group Coupled (199 n + 42 γ) Cross Section Library in AMPX Format Based on JEFF-3.2 Data

The ENEA-Bologna Nuclear Data Group produced the VITJEFF32.BOLIB multi-group coupled (199 n + 42 γ) cross section library in AMPX format, based on the OECD-NEA Data Bank JEFF-3.2 evaluated nuclear data library. The generation of the VITJEFF32.BOLIB library for nuclear fission applications was conceived as an European counterpart of the ORNL VITAMIN-B7 library based on ENDF/B-VII.0 data. The present library has the same neutron/photon energy group structure and general features as the former ORNL VITAMIN-B6 reference library and was produced using similar data processing methodologies, based on the NJOY-2012.53 and SCAMPI nuclear data processing systems. VITJEFF32.BOLIB is a pseudo-problem-independent library based on the Bondarenko (f-factor) method for the treatment of neutron resonance self-shielding and temperature effects. The library contains 184 standard (not bound) nuclides singularly processed at 4 temperatures (300, 600, 1000 and 2100 K) and at 11 background cross sections. Thermal scattering cross sections were processed at all the temperatures available in the JEFF-3.2 thermal scattering law data file for 6 additional bound nuclides: H-1 in light water, H-1 in polyethylene, H-1 in zirconium hydride, H-2 in heavy water, C in graphite and Be in beryllium metal. From VITJEFF32.BOLIB it is possible to generate, through the ENEA-Bologna 2007 Revision of SCAMPI, collapsed working libraries of self-shielded cross sections in AMPX or FIDO-ANISN format for LWR applications.