AERIAL RADIOLOGICAL MONITORING SYSTEM. II. PERFORMANCE, CALIBRATION, AND OPERATIONAL CHECK-OUT OF THE EG&G ARMS-II REVISED SYSTEM
Technical Report
·
OSTI ID:4775528
The design, installation, and performance of the Edgerton, Germeshausen & Grier, Inc., Aerial Radiological Monitoring System are described. The system is used to perform aerial surveys of ground radioactivity. It supplies both geographical position and radioactivity data in digital form, suitable for use with automatic plotting procedures. Inaccuracies in the geographic positioning data are proportional to the distance flown from a visual ground check point and are, under optimum conditions, a maximum of 750 ft per 30 miles of flight path. Inaccuracies in the maps on which the data are presented are of about the same order of magnitude. The radioactivity units recorded by the system contain a maximum uncertainty of plus or minus 9.5 per cent. The performance data satisfy the design specifications, and data compatibility is achieved with the existing U. S. Geological Survey--Oak Ridge National Laboratory system (ARMS-I). The ARMS- II equipment is installed ln a Beech Model 50 Twin Bonanza airplane. A three-man flight crew operates the aircraft and instrumentation during survey flights. Operational checkout of the system was performed Nov. 13 and 14, 1960, over portions of Frenchman Flat and Yucca Flat, Nevada Test Site. It was concluded that nuclear testing contributed to the surface radioactivity in the northern two- thirds of Yucca Flat and a part of Frenchman Flat but that the natural radioactivity of the surficial materials in the southern third of Yucca Flat and much of the Frenchman Flat area accounts for most of the recorded activity. (auth)
- Research Organization:
- Edgerton, Germeshausen and Grier, Inc., Santa Barbara, Calif.
- NSA Number:
- NSA-16-031815
- OSTI ID:
- 4775528
- Report Number(s):
- CEX-59.4(Pt.II)
- Country of Publication:
- United States
- Language:
- English
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