[en] SARAF (Soreq Applied Research Accelerator Facility) is a high intensity CW proton/deuteron accelerator, which is currently under construction at Soreq Nuclear Research Center. The Accelerator will accelerate a few mA proton and deuteron beams up to energies of 40 MeV. The main components of the accelerator are: an ECR ion source to produce a 5 mA DC beam of protons or deuterons at 20 keV/u, a Radio Frequency Quadrupole (RFQ) to bunch the beam and to accelerate it to 1.5 MeV/u, and an RF superconducting linac to accelerate the bunched beam to 40 MeV. The SARAF linac is designed for hands-on maintenance, with beam loss requirement of less than 1 ppm. We present a new approach for beam loss calculations which places emphasis on the tails of the particle distribution. The tails are formed during the bunching process in the RFQ, and are the main source of subsequent particle loss in the superconducting linac. Our technique of tail emphasis allows us to increase beam loss statistics by at least an order of magnitude