MILAGRO: A parallel Implicit Monte Carlo code for 3-d radiative transfer (U

provides parallel, three-dimensional XYZ, one-group radiative transfer capability. It is writ-ten in object-oriented C++ in a maintainable and extensible way. New items in MILAGRO are parallel reproducibility, generic classes templated on Mesh Type (MT), C++/Fortran90 interfacing, and a parallel strategy. Verification of MILAGRO includes coding according to Design by ContractTM (DBC) and successful completion of several test problems. The test problems are variants of the Marshak Wave test problem, Su and Olson’s non-equilibrium benchmark [1,2], and several simple and necessary, but not sufficient, test cases (U)