Heat and mass transfer with laminar flow of dissociating gas in a fuel element cluster placed in a hexahedral shell

The algorithm to calculate heat and mass transfer in laminar flow of dissociating gas flow in peripherial cassette fuel elements is offered. To determine the temperature of analytical solutions of the heat conduction equations for a rod, cladding and a gap with boundary conditions of conjugation for temperatures and heat fluxes. This has made it possible to pass from solving the cojugate problem to solving the energy equation merely for the coolant. The results of calculation of temperature distribution over a cladding surface for different values of the heat conduction coefficient both for the case of frozen flow and in the presence of chemical reactions in the flow are given