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Current Status of ACE Format Libraries for MCNP at Nuclear Data Center of KAERI

2016; Volume: 41; Issue: 3 Linguagem: Inglês

10.14407/jrpr.2016.41.3.191

2508-1888

Do Heon Kim, Choong-Sup Gil, Young‐Ouk Lee,

Radiation Detection and Scintillator Technologies

Background The current status of ACE format MCNP/MCNPX libraries by NDC of KAERI is presented with a short description of each library. Materials and Methods Validation calculations with recent nuclear data evaluations ENDF/B-VII.0, ENDF/B-VII.1, JEFF-3.2, and JENDL-4.0 have been carried out by the MCNP5 code for 119 criticality benchmark problems taken from the expanded criticality validation suite supplied by LANL. The overall performances of the ACE format KN-libraries have been analyzed in comparison with the results calculated with the ENDF/B-VII.0-based ENDF70 library of LANL. Results and Discussion It was confirmed that the ENDF/B-VII.1-based KNE71 library showed better performances than the others by comparing the RMS errors and χ2 values for five benchmark categories as well as whole benchmark problems. ENDF/B-VII.1 and JEFF-3.2 have a tendency to yield more reliable MCNP calculation results within certain confidence intervals regarding the total uncertainties for the keff values. Conclusion It is found that the adoption of the latest evaluated nuclear data might ensure better outcomes in various research and development areas. Keywords: MCNP/MCNPX, ACE format library, Expanded criticality validation suite, Root mean square error, χ2 value, Unresolved resonance probability table