The Self-Powered Detector Simulation ‘MATiSSe’ toolbox applied to SPNDs for severe accident monitoring in PWRs

Loïc Barbot (1) , Jean-Francois Villard (1) , Stéphane Fourrez (2) , Laurent Pichon (2) , Hamid Makil (3)

1 LDCI - Laboratoire de Dosimétrie, de Contrôle-commande et Instrumentation
2 THERMOCOAX SAS Company
3 LCAE (CEA, LIST) - Laboratoire Capteurs et Architectures Electroniques (CEA, LIST)

In the framework of the French National Research Agency program on nuclear safety and radioprotection, the ‘DIstributed Sensing for COrium Monitoring and Safety’ project aims at developing innovative instrumentation for corium monitoring in case of severe accident in a Pressurized Water nuclear Reactor. Among others, a new under-vessel instrumentation based on Self-Powered Neutron Detectors is developed using a numerical simulation toolbox, named ‘MATiSSe’. The CEA Instrumentation Sensors and Dosimetry Lab developed MATiSSe since 2010 for Self-Powered Neutron Detectors material selection and geometry design, as well as for their respective partial neutron and gamma sensitivity calculations. MATiSSe is based on a comprehensive model of neutron and gamma interactions which take place in Selfpowered neutron detector components using the MCNP6 Monte Carlo code. As member of the project consortium, the THERMOCOAX SAS Company is currently manufacturing some instrumented pole prototypes to be tested in 2017. The full severe accident monitoring equipment, including the standalone low current acquisition system, will be tested during a joined CEA-THERMOCOAX experimental campaign in some realistic irradiation conditions, in the Slovenian TRIGA Mark II research reactor

Mots clés: PWR; Pressurized water reactor; Monte Carlo; SPND; Self-powered neutron detectors; Severe accident instrumentation; Corium monitoring; radioprotection; ionizing radiation; radioactivity; instrumentation; nuclear instrumentation; neutrons; detector; Neutron-gamma discrimination; Particle transport; MCNP

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Physique Nucléaire Expérimentale [nucl-ex]; Méthodologie [stat.ME]

Loïc Barbot, Jean-Francois Villard, Stéphane Fourrez, Laurent Pichon, Hamid Makil. The Self-Powered Detector Simulation ‘MATiSSe’ toolbox applied to SPNDs for severe accident monitoring in PWRs. EPJ Web of Conferences, 2018, 170, pp.08001. ⟨10.1051/epjconf/201817008001⟩. ⟨cea-01767731⟩