  We show that at wavelengths comparable to the length of the shower produced
by an Ultra-High Energy cosmic ray or neutrino, radio signals are an extremely
efficient way to detect these particles. First results are presented of an
analysis of 20 hours of observation data for NuMoon project using the
Westerbork Synthesis Radio Telescope to search for short radio pulses from the
Moon. A limit on the neutrino flux is set that is a factor four better than the
current one (based on FORTE).
