  A ThO$_{2}$ sample and a nickel activation foil were irradiated in the
leakage neutron field of CFBR-II reactor. The activities of the activation
products were measured after irradiation to obtain the reaction rates. The
normalized reaction rates were also calculated based on the ENDF/B-VII.1,
CENDL-3.1, JENDL-4.0, BROND-2.2 databases. The experimental reaction rate ratio
is 4.37 with an uncertainty of 3.9\% which is coincident with each of the
ratios calculated based on the ENDFB-VII. 1, JENDL-4.0, BROND-2.2 databases,
but is 11.2\% larger than that based on CENDL-3.1 database.
