POLYETHYLENE FILTER FOR THE TNF2 THERMAL NEUTRON FACILITY.
Radiat Prot Dosimetry
; 199(3): ncac255 187 190-190, 2023 Mar 02.
Article
em En
| MEDLINE
| ID: mdl-36521803
ABSTRACT
The Standard Thermal Neutron Flux Unit, TNF2, in (LNMRI/IRD)(1, 2), was built for neutron detector and survey meter calibrations. The facility's fluence is achieved by moderation of four 241Am-Be with a graphite core and paraffin/graphite blocks surrounding it. Due to the small channel dimensions, it is impossible to calibrate personal dosemeters and survey meters for thermal neutrons. A polyethylene filter construction was carried out to allow the external irradiation of personal dosemeters and neutron survey meters. The polyethylene filter was constructed with 29 stacked discs with diameters ranging from 5 to 34 cm. Different thicknesses were simulated to provide the desired effect. This new irradiation configuration was also experimentally tested and compared with simulation results with MCNPX(3).
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01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteção Radiológica
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Grafite
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article