SENSITIVITY OF ACTIVATION CROSS SECTIONS OF THE HAFNIUM, TANTALUM AND TUNGSTEN STABLE ISOTOPES TO NUCLEAR REACTION MECHANISMS

摘要

A detailed analysis of the fast-neutron activation cross sections for W isotopes, relevant to safety aspects and waste management of power plants, has already been reported with the aim to study the ratios of calculated-to-experimental activity (C/E) for several of the dominantly produced radionuclides. These ratios were found significantly above unity within a benchmark experiment with pure W irradiated by 14 MeV neutrons, when calculated with the European Activation System (EASY). The above-mentioned analysis, concerning all activation data for the stable W isotopes, was carried out using the computer codes EMPIRE-II and TALYS as well as a local parameter set in one updated version of STAPRE-H code.