  We model a compact black hole-accretion disk system in the collapsar scenario
with full transport, frequency dependent, general relativistic radiation
magnetohydrodynamics. We examine whether or not winds from a collapsar disk can
undergo rapid neutron capture (r-process) nucleosynthesis and significantly
contribute to solar r-process abundances. We find the inclusion of accurate
transport has significant effects on outflows, raising the electron fraction
above $Y_{\rm e} \sim 0.3$ and preventing third peak r-process material from
being synthesized. We analyze the time-evolution of neutrino processes and
electron fraction in the disk and present a simple one-dimensional model for
the vertical structure that emerges. We compare our simulation to semi-analytic
expectations and argue that accurate neutrino transport and realistic initial
and boundary conditions are required to capture the dynamics and
nucleosynthetic outcome of a collapsar.
