MODELING THE BLACK-HOLE INTERIOR

We present two possibilities for the internal structure of a charged b lack hole in which we take into account the hypothesis that the curvat ure is bounded. In the first model we match the de Sitter spacetime wi th the external Reisner-Nordstrom solution at a null junction surface that represents a short transition layer placed at the Cauchy horizon. In the second model, we describe the black hole evaporation using a p air of non-stationary null shells.