  The contribution provides the starting points and background of the model of
Expansive Nondecelerative Universe (ENU), manifests the advantage of
exploitation of Vaidya metrics for the localization and quantization of
gravitational energy, and offers four examples of application of the ENU model,
namely energy of cosmic background radiation, energy of Z and W bosons acting
in weak interactions, hyperfine splitting observed for hydrogen 1s orbital.
Moreover, time evolution of vacuum permitivity and permeability is predicted.%
