IMPROVEMENTS OF CROSS SECTION LIBRARIES FOR KASKAD-S

The nuclear data preparation system for KASKAD-S is improved. KASKAD-S is the deterministic code which is used for ADS-related calculations along with the Monte Carlo code LAHET. The multigroup high-energy cross sections and stopping powers for KASKAD-S are generally prepared by the code FOROS. The calculation results using the nuclear data generated by FOROS show good agreements with the experimental data except below a few hundreds MeV where the large discrepancies are observed. Some nuclear data including the transfer matrices are currently built into the source code of FOROS, and hence the updates of nuclear data in FOROS require the elaborate modification. The new method for generating the coupled proton-neutron data without using FOROS is developed. The processed data from NJOY and TRANSX are fed into the newly developed codes LIBBER and ANIFM to generate the coupled proton-neutron cross section libraries for KASKAD-S. With the help of these codes, up-to-date cross section data can be easily used in KASKAD-S calculations. Several benchmark calculations are performed using the newly generated data and compared with the experimental data. Our results for 30 MeV protons are in good agreement with the experimental data, which shows that our method to prepare the cross section libraries for KASKAD-S from the recently evaluated libraries is sufficiently effective for the calculation of ADS-related problem.