In several experiments utilizing airplanes and helicopters the detection limits of different measuring techniques with regard to the location of small, point-like radiation sources as may occur as consequence of a satellite crash with reactor on bord, were investigated. The minimum detectable activities of (sup 60)Co at a flight height of 100 m and a flight speed of 100 km/h amounted to appr. 2,9 GBq for dose equivalent GM-detector systems, to approx. 1 GBq for HPGe-detectors, to 0,17 GBq for 3'x3' NaI-detectors and to 0,05 GBq for extremely large NaI-detectors (33 l aerial geological probe). The deterioration of the detection limit upon changes in flight height, flight speed and the lateral deviation from direct overflight was also investigated. From measurement data and derived detection limits an optimal measurement proposal adjusted to the available instruments is presented which permits a quick and area-covering surveillance of a possibly affected area. 9 refs., 28 tabs., 7 figs. (Authors). (Atomindex citation 22:016929)
Aufspueren von Bruchstuecken von Satelliten mit Kernreaktoren - ein Vergleich verschiedener Methoden. (Comparison of airborne detection methods of fragments of reactor supplied satellites)
1990
100 pages
Report
No indication
English
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