While many physical processes involve turbulent flows, few have the added feature of thermonuclear burn as in Inertial Confinement Fusion (ICF). A principal issue is that within this flow (as opposed to chemical combustion) there are no data on the specific evolution of the turbulent processes and thus we are left with validating practical calculations against integral data of the desired application and more fundamental experiments that are scaled (to some degree) with the application. A  common thread in the literature for one of those fundamental flows, Rayleigh-Taylor, is to ignore either the Direct Numerical Simulations or the experimental data and often just examine late time states. Discussed will be the available data sets & model comparison with a focus on calculating the evolution of turbulence in Rayleigh-Taylor and Richtmyer-Meshkov configurations. While the focus will be on the BHR RANS model, comparison at times will be made with DNS and LES to demonstrate  the level of expected predictability of these flows.