Benchmark CENDL-3.1 with International Handbook of Evaluated Criticality Safety Benchmark Experiments

Nearly one thousand assemblies were selected from the International Criticality Safety Benchmark Evaluation Project（ICSBEP） in the International Handbook of Evaluated Criticality Safety Benchmark Experiments.These cases cover the fast,inter-and thermal spectrum.Criticality calculations were done by using Monte Carlo code MCNP4C.The ACE files were produced with nuclear data processing code NJOY99.259.The calculated results of effective multiplication factor k_eff with CENDL-2.1 and CENDL-3.1 libraries were compared with the experimental results.The systematic validation shows that the data from CENDL-3.1 give better results of k_eff values than those from CENDL-2.1.