Abstract
Radioxenon monitoring has become one of the major concerns in both international monitoring systems and on-site inspection. The most important technical specifications for radioxenon system are the radon removal coefficient and the minimum detectable activity concentration. We have developed one kind of on-site radioxenon sampling, separation and measurement system, and have tested it under high radon activity concentration levels. The result shows the natural 133Xe background activity concentration, the 133Xe/222Rn ratio and the radon removal coefficient to be in the ranges 0.73–1.6 mBq/m3, (1.5–3.5) × 10−8 and (2.3–57) × 10−8, respectively.
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