Search academic texts

Information × Registration Number 0222U005125, 0122U000852 , R & D reports Title New methods of registration of long-lived radionuclides in NPP construction materials for their further processing popup.stage_title Head Zheltonozhskyi Viktor O., Доктор фізико-математичних наук Registration Date 19-12-2022 Organization Institute of Nuclear Research of the National Academy of Sciences of Ukraine popup.description2 Gamma-spectra of structural materials of the 2-nd block of the Chernobyl NPP were measured and analyzed, which were irradiated with bremsstrahlung γ-quanta with end-point energy near 37 MeV. Using the ratio of the 57Co and 58Co activity yields, the masses ratio of the 62Ni and 59Co stable nuclides was determined. A method for determining of the 63Ni activity was developed on the basis of the obtained data and the measured activity of 60Co in the studied samples. Radiochemical verification of the created method was carried out and a good quantitative agreement of the 63Ni activities obtained by radiochemical and spectrometric methods was obtained. The ratio of the number of 62Ni and 54Fe nuclei to the number of 59Co nuclei was determined from the measured γ-spectra, using the ratio of the 57Co, 58Сo and 54Mn yields. Using the obtained data and the measured activity of 60Co in the studied samples, a method for determining of the 59Ni and 55Fe activities was developed. A radiochemical verification of the developed method was carried out and a good quantitative agreement of the 59Ni and 55Fe activities obtained by spectroscopic and radiochemical methods was obtained.   Product Description popup.authors Bondarkov Dmytro Mykhailovych Kulich Nadiya V. Myznikov Dmуtro Evgenovich Savrasov Andrij Mukolayovuch Sadovnikov Leonid Volodymyrovich Slisenko Igor Vasylovych Strilchuk Mykola Volodymyrovych Khomenkov Volodymyr Petrovich popup.nrat_date 2022-12-19 Close