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

Volume

41

Issue

4

fYear

1994

fDate

8/1/1994 12:00:00 AM

Firstpage

993

Lastpage

998

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;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.322846

Filename

322846