  We present a detailed study of radion stabilization within 5D conformal SUGRA
compactified on an $S^{(1)}/Z_2$ orbifold. We use an effective 4D superfield
description developed in our previous work. The effects of tree level bulk and
boundary couplings, and in particular of one loop contributions and of a non
perturbative correction on the radion stabilization are investigated. We find
new examples of radion stabilization in non SUSY and (meta-stable) SUSY
preserving Minkowski vacua.
