Title :
A study on natural background neutron dose
Author :
Jiang, S.H. ; Yeh, J.J. ; Lin, R.Y. ; Liang, J.H. ; Hsu, R.J. ; Chen, J.R. ; Liu, J.C. ; Wang, J.P. ; Chang, F.D.
Author_Institution :
Dept. of Nucl. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
8/1/1994 12:00:00 AM
Abstract :
In order to monitor the neutron dose in the environment of the Synchrotron Radiation Research Center, the sensitivity of the monitor system to the natural background cosmic-ray neutrons must be established. Large-size BF3 counters with and without an 8.5-cm polyethylene enclosure were used to measure the cosmic-ray neutrons in the Nuclear Engineering Building, NTHU. The response functions of the BF3 counters were calculated by using ANISN code performed in adjoint mode. By applying the cosmic-ray neutron spectrum and the detector response functions the measured counting rates of the BF3 counters were converted to deliver the annual dose of cosmic-ray neutrons. The shielding effect of the concrete slabs and windows of the building was determined by the measured data and compared to that predicted by neutron transport calculations
Keywords :
cosmic ray neutrons; neutron detection and measurement; proportional counters; radiation monitoring; ANISN; BF3 counters; SRRC; Synchrotron Radiation Research Center; concrete; cosmic-ray neutrons; natural background; neutron dose; polyethylene; response functions; shielding; Absorption; Atmosphere; Earth; Geomagnetism; Neutrons; Nitrogen; Particle scattering; Radiation detectors; Radiation monitoring; Synchrotron radiation;
Journal_Title :
Nuclear Science, IEEE Transactions on
