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Proceedings Paper

Human intrusion monitor for special nuclear material storage facilitites
Author(s): Mary Bliss; Richard A. Craig; Richard J. Arthur; Martin D. Winterrose
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Paper Abstract

A radiation detector has been assembled that monitors human intrusion in rooms containing kilogram quantities of special nuclear material (SNM). The detector is fabricated from scintillating glass fibers that contain 6Li as the neutron absorber. The detector is designed to consume a minimum of power and to be placed in a standing position, thereby presenting a minimum profile and allowing placement in existing facilities. A small footprint is achieved by using intrinsically-thin fiber optics and by undermoderating the system. The detector operates by alarming on a rapid change in the thermal neutron count rate, which corresponds to albedo neutrons that are thermalized or absorbed in the hydrogen and carbon of human body tissues when someone enters the existing neutron flux found in SNM storage rooms.

Paper Details

Date Published: 29 January 1999
PDF: 3 pages
Proc. SPIE 3536, Nuclear Waste Instrumentation Engineering, (29 January 1999); doi: 10.1117/12.339068
Show Author Affiliations
Mary Bliss, Pacific Northwest National Lab. (United States)
Richard A. Craig, Pacific Northwest National Lab. (United States)
Richard J. Arthur, Pacific Northwest National Lab. (United States)
Martin D. Winterrose, Pacific Northwest National Lab. (United States)

Published in SPIE Proceedings Vol. 3536:
Nuclear Waste Instrumentation Engineering
David E. Robertson, Editor(s)

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