METHOD OF REACTOR TESTS OF HIGH-TEMPERATURE VENTILATED HEAT-RECOVERING ELEMENTS Russian patent published in 2019 - IPC H01J45/00 

FIELD: test technology; nuclear physics and technology.

SUBSTANCE: invention relates to a method for reactor testing of high-temperature ventilated fuel elements as part of an ampoule irradiation device nuclear physics and technology and can be used in the design and justification of the resource of high-temperature, for example, thermionic fuel elements of a space NPU. In an ampulnary irradiation device, pairs of fuel elements of natural diametral dimensions of the basic structure with the same cores of uranium dioxide and shells of different materials are placed: monocrystalline molybdenum and tungsten or high-temperature alloy of refractory metals, which has a creep rate of 10^-4–10^-3 on the creep rate of single-crystal molybdenum. Conduct irradiation of fuel rods in the range of 1,400–1,800 °C, while the temperatures between adjacent pairs of fuel rods are selected differing by 100–150 °C, and according to the results of measurements of the diametral deformation of their shells, the integral creep coefficient of the fuel core is determined.

EFFECT: technical result is the ability to determine the creep characteristic of the fuel core in reactor conditions with regard to the regular temperature distribution in the range of 1,400–1,800 °C and structural zones in the fuel core.

1 cl, 1 dwg