Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

Regular Thermal Mode Method to Determine the Heat Release in the Structural Materials of the IR+8 Reactor Reflector

12/16/2023 2023 - #04 Nuclear materials

Arefinkina S.E. Abramov A.N. Babenko A.V. Erak D.Yu. Efremov P.K. Mikhin O.V. Yakovlev V.V.

DOI: https://doi.org/10.26583/npe.2023.4.06

UDC: 621.039.553.3

The non-stationary method of regular thermal regime is considered as an approach to determine the value of heat release in structural materials samples. We present the derivation of a working equation that can be used to promptly find the average heat release when thermocouple is located at the «critical» radius of cylindrical sample.

The data received by the proposed method of determining the heat release in stainless steel and titanium samples that were irradiated in the third reflector row of the IR-8 reactor of NRC «Kurchatov Institute» are presented. The experimental device and cylindrical samples were instrumented by thermocouples. A good agreement of the results with the data from other computational approaches for determining the heat release in the samples is shown.

The proposed method of on-line experimental determination of heat release can be applied when conducting various reactor experiments. The possibility of using this method to monitor the parameters of experimental fuel rod samples or fuel rod simulators while they are irradiated in the ampoule device has been considered. In case of a tungsten-core fuel rod simulator, the choice of thermocouple location should be made with regard to the position of its «critical» point in the cylinder, where the unsteady thermal process takes place only in a regular form. These data can be used both for express control of irradiation parameters during experiment as well as for verification of calculation models which describe the specimens behavior during their testing in ampoule devices.

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regular thermal mode energy release determination instrumentation by thermocouples structural materials fuel rods samples ampoule device research reactor

Link for citing the article: Arefinkina S.E., Abramov A.N., Babenko A.V., Erak D.Yu., Efremov P.K., Mikhin O.V., Yakovlev V.V. Regular Thermal Mode Method to Determine the Heat Release in the Structural Materials of the IR+8 Reactor Reflector. Izvestiya vuzov. Yadernaya Energetika. 2023, no. 4, pp. 73-85; DOI: https://doi.org/10.26583/npe.2023.4.06 (in Russian).

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