Review of all existing methods and experiments indicates that ST is the best methodto use for enhancement of CHF in water-cooled divertors. If it is desirable to have rectangular coolant channel, for ease of brazing PFC to the coolant channel, hypervapotron is preferred as a heat transfer enhancement method. GA has developed CHF correlations for ST and hypervapotrons [3] which show an excellent (±10%) agreement with experimental results