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29 January 1999 Human intrusion monitor for special nuclear material storage facilitites
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Proceedings Volume 3536, Nuclear Waste Instrumentation Engineering; (1999)
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States
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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mary Bliss, Richard A. Craig, Richard J. Arthur, and Martin D. Winterrose "Human intrusion monitor for special nuclear material storage facilitites", Proc. SPIE 3536, Nuclear Waste Instrumentation Engineering, (29 January 1999);

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