The FNDS system ("Fast Neutron Detection System") for the on-line in-pile detection of the fast neutron flux in the presence of a significant thermal neutron flux and a high gamma dose rate is being developed in the framework of the SCK•CEN-CEA Laboratoire Commun. The system has been patented in 2008. The system consists of a miniature Pu-242 fission chamber as main detector, complemented by a U-235 fission chamber or a rhodium Self-Powered Neutron Detector (SPND) for thermal neutron flux monitoring and a dedicated acquisition system that also takes care of the processing of the signals from both detectors to extract fast neutron flux data. This paper describes a FNDS qualification experiment in the SCK•CEN BR2 reactor, with experimental results on a large set of fission chambers in current and Campbelling mode.
|Title of host publication||2nd International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2011|
|Place of Publication||United States|
|State||Published - 3 Apr 2012|
|Event||2011 - ANIMMA - Advancements in Nuclear Instrumentation Measurement Methods and their Applications: International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications - Ghent|
Duration: 6 Jun 2011 → 9 Jun 2011
|Conference||2011 - ANIMMA - Advancements in Nuclear Instrumentation Measurement Methods and their Applications|
|Period||2011-06-06 → 2011-06-09|