APPROXIMATED CALCULATION METHODS OF UNSTEADY TEMPERATURE FIELD IN A LIGHT WATER REACTOR FUEL ROD

Michał Podowski, Wojciech Fijałkowski

Abstract


Three approximated methods of solving a problem of one-dimensional unsteady heat conduction for cylindrical coordinates are presented. A fuel rod of a pressurized light water reactor is tiken into account with regard to the change of fuel pronerties with temperature. Boundary conditions of the third kind are assumed. A radial distribution of temperature for a step change of heat transfer coefficient is obtained.

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