Development and Modeling of Neutron Detectors for In-Core Measurement Requirements in Nuclear Reactors

摘要

The Reactor Measurement Systems Laboratory (LSMR) of the CEA/Cadarache, is specialized in the development, design, modeling and manufacturing of neutron detectors, especially miniature fission chambers. This laboratory can define the characteristics of the detector for any requirements: 1. type of chamber (cylindrical or plate), 2. diameter (1.5 mm, 4 mm, 8 mm,...), 3. nature of fissile product (uranium, plutonium, neptunium, curium,...), 4. mass of fissile product, and 5. nature and pressure of gas (argon, helium). The laboratory has also developed modeling codes and in particular, a new theoretical method to foresee the current-voltage characteristics of a chamber that operates in current mode (sensitivity, saturation plateau).