ACTIVATION CROSS-SECTION CALCULATIONS ON THE PRODUCTION OF LONG-LIVEDRADIONUCLIDES

An estimation of the production of long-lived radionuclides by neutron -induced reactions in potential fusion reactor materials is very impor tant for the development of low-activation materials Although some mea sured data of activation cross sections leading to long-lived radioact ive nuclides are available, the development of a calculation capabilit y is necessary to provide complete excitation functions of the reactio ns involved. Calculations are not generally effective when experimenta l data to determine the parameters used in the model calculation are l imited. In the SINCROS-II system, the consistency of the method of cal culation is respected, and the parameters used ape cross-checked by th e available experimental data and the systematic trend of the calculat ed results Thus, the SINCROS-II is expected to predict the activation cross sections with good accuracy, even if the cross section is calcul ated for a radioactive target nucleus. As an example of the cross-sect ion predictions, the activation cross-section calculations are present ed up to 20 MeV for neutron-induced production of long-lived radioacti ve nuclides Co-60, Ni-59, Ni-63, Nb-91, Nb-94, Mo-93, Mo-99, (108)mAg, Eu-150m, Eu-152, Tb-158 and Re-186m.