The effects of correlations on the NC nu-Nucleon scattering opacities are calculated for a plasma of asymmetric hot nuclear matter including weak magnetism corrections. The RPA opacities are substantially changed from the ones in Hartree approximation. The mean free paths are longer for antineutrinos than for neutrinos. Many body corrections lead to the existence of a density and temperature range where aditional energy is deposited in the plasma.