  We present radiative one-loop neutrino mass model with hypercharge zero
scalar triplet in conjunction with another charged singlet scalar and an
additional vectorlike lepton doublet. We study three variants of this mass
model: the first one without additional beyond-SM symmetry, the second with
imposed DM-stabilizing discrete Z_2 symmetry, and the third in which this Z_2
symmetry is promoted to the gauge symmetry U(1)_D. The two latter cases are
scotogenic, with a neutral component of the scalar triplet as a dark matter
candidate. In first scotogenic model the Z_2-odd dark matter candidate is at
the multi-TeV mass scale, so that all new degrees of freedom are beyond the
direct reach of the LHC. In second scotogenic setup, with broken U(1)_D
symmetry the model may have LHC signatures or be relevant to astrophysical
observations, depending on the scale of U(1)_D breaking.
