  The existence of the coherent neutrino-nucleus scattering reaction requires
to evaluate, for any detector devoted to WIMP searches, the irreducible
background due to conventional neutrino sources and at same time, it gives a
unique chance to reveal supernova neutrinos. We report here a detailed study
concerning a new directional detector, based on the nuclear emulsion
technology. A Likelihood Ratio test shows that, in the first years of
operations and with a detector mass of several tens of tons, the observation of
the supernova signal can be achieved. The determination of the distance of the
supernova from the neutrinos and the observation of $^8$B neutrinos are also
discussed.
