METHOD OF TESTING HIGH-TEMPERATURE HEAT EXTINGUISHING ELEMENTS Russian patent published in 2018 - IPC G21C17/06 

FIELD: power industry.

SUBSTANCE: method includes placing ventilated fuel rods in the ampoule irradiator having diametrical dimensions and material composition of the base fuel rods, irradiation and subsequent measurement of the diametral deformation of their shells. In the ampoule irradiator, there is an additionally placed and simultaneously with the ventilated test, followed by measuring the deformation of the shells of at least three non-ventilated fuel rods with the same diametrical dimensions and the material composition having different compensation volumes, the magnitudes of which differ from each other by at least two times. At the same time, the internal cavity of ventilated fuel elements is filled with an inert gas under pressure, which during the test is maintained in the range (0.4÷4)⋅10⁴ Pa.

EFFECT: improving the reliability of health evaluation of fuel by splitting contributions to change the characteristics of the shell from the effects of fuel and the impact of gaseous fission products.

2 cl, 2 dwg