VALIDATION OF A NEW LATTICE PHYSICS CODE GALAXY FOR PWRS

摘要

A new lattice physics and assembly calculation code GALAXY with the 172 energy-group ENDF/B-VII.O library has been developed. GALAXY generates few group nuclear constants used in a new core simulator COSMO-S. The GALAXY code uses the many enhanced calculation method for more explicit treatment of neutronics characteristics. The outline of enhanced methods used in GALAXY and the qualification results are shown in this paper. From the qualifications in the continuous energy Monte Carlo benchmark, critical experiment analyses and post irradiation examination (PIE) analyses, GALAXY with the library was validated and the applicability of GALAXY to PWR nuclear design was confirmed.