In core neutronic measurements in an industrial environment. Assessment of the performances of the in-vessel neutronic measurements chains of SUPER-PHENIX 1

For the commissioning tests of the Creys-Malville nuclear power plant it was necessary to develop an auxiliary neutron monitoring system. The resulting system has been designed to withstand the severe operating conditions prevalent during core loading, first criticality and neutron testing at full-power. Experience gained after using this system for 15 months has allowed us to identify its major performance features as well as consequent findings which may be useful for the design of an integrated neutron monitoring system for future fast reactors