A study and statistical analysis has been performed on available burnout heat-flux data for vertical upflow of water in uniformly heated rectangular channels at 2000 psia. Two correlating equations were developed with the fluid mass velocity and enthalpy at the burnout location as the two independent variables. It was not found necessary to include the channel length-to-thickness ratio as a third independent variable. The range of variables studied are: 540 to 1000 Btu/lb burnout enthalpy and 0.2 × 106 to 5 × 106 lb/hr-ft2 mass velocity. It is shown that the burnout heat-flux decreases as mass velocity increases for a constant burnout enthalpy in the quality range. Also, a comparison of the developed correlations based upon data for uniformly-heated channels was made with 25 burnout data points for channels having a cosine-shaped axial heat-flux distribution. The cosine data fall on the average of about thirty percent below the burnout heat-flux values for uniformly heated channels under the same coolant conditions at the burnout location.