A COINCIDENCE COUNT ALPHA PARTICULATE AIR MONITOR
An alpha monitor for the detection of airborne plutonium was developed and tested satisfactorily. The measured plutonium alpha detection sensitivity is 15 MPC-HOURS; that is, a continuous alpha air concertration of 2 x 10/sup -12/ mu c/cc (one MPC for a 40 hour week) can be detected with consequert alarm energizing after a 15 hour collection period. This sensitivity can be attained even under extreme natural alpha emitter (radon-thoron) concentration conditions of 2 x 10/sup -10/ mu c/cc. The time-to-alarm or inherent sensitivity is linearly related to the continuous plutonium air concentration in that 2 x 10/sup -11/ mu c/cc causes alarm in 1.5 hours and 2 x 10/sup -10/ mu c/cc (100 MPC) causes alarm in 9 minutes. (auth)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
- DOE Contract Number:
- AT(45-1)-1350
- NSA Number:
- NSA-17-007954
- OSTI ID:
- 4754277
- Report Number(s):
- HW-75384
- Country of Publication:
- United States
- Language:
- English
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