This monitor is designed to automatically perform consistent, thorough scanning. Designed primarily as a contamination monitor, the SPM-906 will detect less than 100nCi of mixed fission/activation products on a walk-pause-walk basis.
Set up is accomplished using the hand-held terminal, or a computer with a Windows 95/NT communications program. Both the terminal and the program are included with the system.
When an alarm occurs, the system will sound an audio alarm, and indicate which detector(s) alarmed to help locate the source of contamination. When the system is idle, the background is continuously updated. In the event of a power outage, an internal battery provides eight hours of continuous operation.
SENSITIVITY: SNM applications - for 235U and 239Pu. For Health Physics, detects less than 100 nanocuries (3,700 Bq) of mixed activation products in a nominal 20 µR/hr background (0.20 µSv).
DETECTORS: Two, 12" x 38" x 1.5" (30 x 97 x 3.8 cm) organic plastic scintillator detectors per pillar. One, 10" x 12" x 1.5? (25 x 30 x 3.8 cm) organic plastic scintillator detector at both the head and foot. Total volume of scintillator per system: 3,096 in3 (50.8 liters).
FALSE ALARM RATES: Typically less than 1 in 1,000 passages. NOTE: Sensitivity and False Alarm Rate are interdependent and must be optimized for different background levels.
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