Color singlet exchange between jets and the PHOJET Monte Carlo

Hadron production in diffraction dissociation is studied in a model which i ncludes hard diffraction and soft hadron interaction as controlled by a sup ercritical pomeron. Rapidity gaps between jets are obtained by soft color r ecombination (SCR). It was previously shown that this model is able to desc ribe data on diffractive hadron production from the CERN-SPS collider and f rom the HERA lepton-proton collider. Here we present model predictions for rapidity gap events in p-p collisions at root s = 1800 GeV and compare to T EVATRON data.