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To validate the JENDL-3.3 library, eight different FCA cores were selected and were used for the benchmark test on criticality (keff value). In the test, the Monte Carlo calculation code was used. The results were compared with those of the JENDL-3.2 library. The spectrum dependence of the C/E values with the JENDL-3.3 library was found in the softer neutron spectrum cores. This spectrum dependence was caused by the revised capture cross section of U-235 in the JENDL-3.3 library. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]