Аннотация
This work is devoted to the determination of impurities in concrete samples – the structural material of the ITER reactor. The results of reactor experiments and spectrometric studies are presented. Irradiation of samples for instrumental neutron activation analysis was carried out at the IVG.1M reactor. Post-analysis included gamma spectrometric measurements with different exposure times of samples from one day to one month, with the calculation of the concentration of the main and impurity elements by the relative INAA method. For comparison, rocks such as SG-4 and SGD were used as standardmaterials. An analysis of errors was performed during instrumental neutron activation analysis at the IVG.1M reactor. As a result of the research, the content of elements that can make the main contribution to the radiation situation in the premises during the operation and decommissioning of ITER are determined.