ライブラリ登録: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

FREE CONVECTION OVER A VERTICAL ZIRCALOY PLATE IN STEAM WITH SIMULTANEOUS OXIDATION

Get access (open in a dialog) DOI: 10.1615/IHTC7.3480
pages 435-440

要約

During an accidental loss of coolant in a nuclear reactor, the potential hazard of hydrogen generation and structural damage to the fuel cladding, resulting from the steam oxidation of Zircaloy, calls for a detailed study of the associated heat and mass transfer processes.
This analysis is based on a model of binary boundary layer flow of steam and hydrogen. Experimentally observed oxidation rate law with a rate constant given by the Arrhenius equation is modified to account for variable temperatures and for the hydrogen boundary layer. The results indicate that, for the conditions of the Three-Mile-Island reactor accident, the physical and chemical processes are quasi-steady and the heat and mass transfer processes are essentially decoupled. Velocity and hydrogen concentration distributions as influenced by surface radiation are presented. Correlations for the local cladding temperature rise and local Nusselt number are proposed.