Transmission of Fast Neutrons Along Cylindrical Air-Filled Ducts Pierced in Ilmenite Concrete

摘要

The variation of flux of fast neutrons along air filled ducts passing through ilmenite concrete of density 4.6 gm. cm exp -3 was measured. Ducts of diameter 2.9, 5.8 and 10 cm were used. Measurements were carried out at different distances (up to 120 cm) along the duct axis. The source of neutrons was a collimated beam of reactor neutrons emitted from one of the horizontal channels of ET-RR-1 reactor. All measurements were performed using phosphorus activation detectors. The data obtained show the dependence of flux values on duct length and diameter. (ERA citation 08:000585)