## ADJUSTMENT OF IRON CROSS SECTION USING AN INTEGRAL EXPERIMENTDepartment of Nuclear Engineering,Nuclear Engineering Research Laboratory, University of Tokyo Hongo, Bunkyo-ku, Tokyo 113, Japan Adjustment of iron cross sections to the integral data of the pulsed sphere experiment at LLNL was carried out by the least square method. The SUSD code system was used for generating sensitivity coefficients and covariances including the effects of the secondary neutron energy distribution. The adjustment of both excitation functions and secondary neutron energy distributions gave successful results. The method is very useful for deriving quantitative accuracy of microscopic data from the integral experiment. KEYWORDS: adjustment, iron, neutron cross sections, integral experiment, secondary neutron energy distribution, covariance |