2020, Moshev, A. A., Rodko, I. I., Berestov, A. V., Yudin, I. A., Tokarev, A. N., Biryukov, A. P., Ocheretko, V. E., Gavrilyuk, M. Y., Мошев, Александр Александрович, Родько, Илья Игоревич, Берестов, Александр Васильевич, Юдин, Игорь Андреевич, Токарев, Антон Николаевич, Бирюков, Александр Павлович

© Published under licence by IOP Publishing Ltd.The urgency of the work consists in using a new approach to the definition of informative frequencies for the identification of corrosion damage. The aim of the work is to determine the discrepancies between the resonance frequencies of the oscillations of the fuel casing segments of the factory geometry and with various types of corrosion damage obtained by modelling defects in the casings of fuel casing segments. As a result of the analysis, informative ranges of ordinal numbers were revealed, which allow to determine the following corrosion damages: thinning from the outer and inner sides of the fuel casing, pitting corrosion, fretting corrosion.

2020, Moshev, A. A., Rodko, I. I., Martynenko, S. P., Martynenko, S. S., Ableyev, A. N., Berestov, A. V., Yudin, I. A., Gerasimov, D. Y., Мошев, Александр Александрович, Родько, Илья Игоревич, Мартыненко, Сергей Павлович, Аблеев, Александр Нариманович, Берестов, Александр Васильевич, Юдин, Игорь Андреевич

© Published under licence by IOP Publishing Ltd.using the modernized high-temperature installation, the elastic characteristics and internal friction of the fuel rod shells were investigated in hot cell in order to update computer codes for WWER-1000 fuel rods. The elastic characteristics of the shell are analytically described and obtained a numerical shape factor of the first longitudinal frequency is calculated. There is description of new measuring units that provide data gathering by automatic or half-automatic mode. The elastic modulus and internal friction temperature dependences are determined by application of high-temperature modernized device that provides carrying out experiments at a temperature of 1160 K. Obtained effect could be interpreted by the crushing of the structure of the material.

2020, Rodko, I. I., Moshev, A. A., Bozhko, Yu. V., Yudin, I. A., Tokarev, A. N., Biryukov, A. P., Chernykh, P. O., Tolstov, M. S., Родько, Илья Игоревич, Мошев, Александр Александрович, Божко, Юрий Валентинович, Юдин, Игорь Андреевич, Токарев, Антон Николаевич, Бирюков, Александр Павлович, Черных, Полина Олеговна, Толстов, Михаил Сергеевич

© Published under licence by IOP Publishing Ltd.As part of the strategic research program of state corporation Rosatom, carried out by the Technological Platform "Closed Nuclear Fuel Cycle with Fast Neutron Reactors", a research to equip protective cells with original equipment, including ultrasonic flaw detectors for primary post-reactor non-destructive research of the properties of critical materials of fast neutron reactors, is being performed. In this paper, we present a method developed for determining corrosion damage of fuel claddings by the acoustic resonance method in hot chamber conditions, and a description of the experimental installation.