The Frascati Neutron Generator (FNG) started operations in November 1992 making available to EU fusion community 14 MeV neutrons at an emission rate of 10 11 s -1 . The fusion community strongly supported the idea of international collaboration in neutronics experiments, data base and code improvement, development of (new) experimental techniques and detectors. FNG was designed and built in ENEA that also operates the machine at its own expenses. FNG is extensively used to perform benchmarks or mock-up experiments of interest to Fusion neutronics in turn validating nuclear data and codes. A number of activities in different fields within a series of collaborations are carried out at FNG so far. © Published under licence by IOP Publishing Ltd.