French comparison exercise with the rotating neutron spectrometer, 'ROSPEC'

P. Crovisier (1) , B. Asselineau (2) , G. Pelcot (2) , L. Van-Ryckeghem (2) , A. Cadiou (3) , H. Truffert (3) , J.-E. Groetz (4) , M. Benmosbah (4)

1 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
2 IRSN/PRP-HOM/SDE/LMDN - Laboratoire de Métrologie et de Dosimétrie des Neutrons
3 COGEMA
4 UFC - Université de Franche-Comté

The French laboratories in charge of 'neutron' dosimetry using the spectrometer 'ROSPEC', formed a working group in 2001. The participants began to study the behaviour of the instrument with a comparison exercise in broad energy neutron fields recommended by the International Organisation for Standardisation (ISO) and available at the LMDN in Cadarache. The complete version of the ROSPEC is made up of six spherical proportional counters fixed to a rotating platform. These counters cover different energy ranges which overlap each other to provide a link between the detectors, within the energy range from thermal neutrons to 4.5 MeV. The irradiation configurations chosen were ISO standard sources (252Cf, (252Cf+D2 O)/Cd, 241Am-Be) and the SIGMA facility. The results show that the 'thermal and epithermal' neutron fluence was widely overestimated by the spectrometer in all configurations.

Mots clés: americium 241; californium 252; lead; article; controlled study; dosimetry; France; neutron radiation; radiation detector; radiation energy; spectrometer; standardization; thermal analysis; Dose-Response Relationship; Radiation; Equipment Design; Equipment Failure Analysis; Neutrons; Radiation Dosage; Radioisotopes; Radiometry; Rotation; Sensitivity and Specificity; Spectrum Analysis

Domaines: Sciences du Vivant [q-bio]

P. Crovisier, B. Asselineau, G. Pelcot, L. Van-Ryckeghem, A. Cadiou, et al.. French comparison exercise with the rotating neutron spectrometer, 'ROSPEC'. RADIATION PROTECTION DOSIMETRY, 2005, 115 (1-4), pp.324-328. ⟨10.1093/rpd/nci028⟩. ⟨hal-03039349⟩