  We propose a model based on an alternative $U(1)_{B-L}$ gauge symmetry with 5
dimensional operators in the Lagrangian, and we construct the neutrino masses
at one-loop level, and discuss lepton flavor violations, dark matter, and the
effective number of neutrino species due to two massless particles in our
model. Then we search allowed region to satisfy the current experimental data
of neutrino oscillation and lepton flavor violations without conflict of
several constraints such as stability of dark matter and the effective number
of neutrino species, depending on normal hierarchy and inverted one.
