  An effective radiative divertor maximizes the utilization of atomic processes
to spread out the energy deposition to the divertor chamber walls and to reduce
the peak heat flux. Because the mixture of neutral atoms and ions in the
divertor can be optically thick to a portion of radiated power, it is necessary
to accurately model the magnitude and distribution of line radiation in this
complex region. To assess their importance we calculate the effects of
radiation transport using CRETIN, a multi-dimensional, non-local thermodynamic
equilibrium simulation code that includes the atomic kinetics and radiative
transport processes necessary to model the complex environment of a radiative
divertor. We also include neutral transport to model radiation from recycling
neutral atoms. This paper presents a case study of a high-recycling radiative
divertor with a typical large neutral pressure at the divertor plate to
estimate the impact of H line radiation on the overall power balance in the
divertor region with consideration for line opacities and atomic kinetics.
