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Long Range Alpha Detector (LRAD)

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Tech ID: 596
Project Overview
The Long-Range Alpha Detector (LRAD) monitors for alpha contamination, in real time, by measuring the amount of ionization produced in the air by alpha radiation. Two hand-held, LRAD-based monitors are being designed for routine inspection of the UF6 storage cylinders at Portsmouth, Paducah, and Oak Ridge. One design is for detecting uranium contamination in areas not accessible using standard health physics equipment. The other design is for quantifying leak rates from fill valves so replacements can be prioritized.
Technology Description
 The LRAD soil surface monitor is a large, flat box in which the open end is placed on top of the soil. Radiation from the soil ionizes the air in the box. The amount of ionized air, which is proportional to the amount and type of radiation, is measured. This method is particularly sensitive to alpha radiation, which is emitted by uranium and transuranic elements.

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