The SimPLiS code: a simulation post-processor for liquid scintillators

This report describes the SimPLiS code. This is a post-processor of the neutron transport code MCNPX-PoliMi. Starting from the output file of MCNPX registering all neutron interactions in a liquid scintillation detector, SimPLiS simulates several phenomena related to the detector characteristics, such as the light output, the charge production, the threshold discrimination, the gamma/neutron discrimination and the coincidence electronics, allowing at the end to compute the coincidence detection rate in an array of detectors. The code has been used in the design of a liquid-scintillator-based neutron coincidence collar for fresh fuel verification in the frame of the PhD thesis of Alice Tomanin.