ON THE INTEGRAL TEST METHOD FOR NEUTRON NUCLEAR-DATA EVALUATION

An integral test method has been proposed for evaluating neutron nucle ar data based on information of spectrum measurements in shielding exp erimental benchmarks. The method employs a number of different integra l measurements, two calculation systems, and a systematic analysis pro cedure to make concrete recommendation for nuclear date evaluation. Th e scheme is effective to resolve a problem due to specific reaction an d the energy range in nuclear data. A general procedure for the evalua tion scheme is described. The method was applied to validate nuclear d ata in Japanese Evaluated Nuclear Data Library, version 3.1 (JENDL-3.1 ), and several essential problems were pointed out for iron. The revis ion work for JENDL-3.2 was performed by Japan Atomic Energy Research i nstitute on the basis of recommendations obtained by using the method. It has been demonstrated that the present method is effective to impr ove accuracy for nuclear data through a review of the revised iron dat a in JENDL-3.2. (C) 1997 Elsevier Science Ltd.