Title :
Irradiation tests in BR2 of miniature fission chambers in pulse, Campbelling and current mode
Author :
Vermeeren, L. ; Geslot, B. ; Breaud, S. ; Filliatre, P. ; Jammes, C. ; Legrand, A. ; Barbot, L.
Author_Institution :
SCK·CEN, Mol, Belgium
Abstract :
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.
Keywords :
data acquisition; fission reactor instrumentation; ionisation chambers; light water reactors; neutron detection; neutron flux; signal processing; BR2; Campbelling mode; FNDS; SCK-CEN-CEA; U-235 fission chamber; acquisition system; current mode; detector signal processing; fast neutron detection system; fast neutron flux data; high gamma dose rate; irradiation tests; miniature Pu-242 fission chamber; miniature fission chambers; on line in pile fast neutron flux detection; pulse mode; rhodium SPND; self powered neutron detector; thermal neutron flux monitoring; Current measurement; Detectors; Inductors; Monitoring; Neutrons; Photonics; Radiation effects;
Conference_Titel :
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2011 2nd International Conference on
Conference_Location :
Ghent
Print_ISBN :
978-1-4577-0925-8
DOI :
10.1109/ANIMMA.2011.6172885
