A Calibration Facility for Radon Fluxmeter

Calibration facilities for radon fluxmeter with three kinds of different emanation medium have been developed. The stability of radon nux is 5%. 9% (RSD) respectively. The uniformity of radon nux is 4.5%, 8.5% (RSD) respectively. These sepcifications fulfill the calibration requirement for radon fluxmeter.The determination of radon nux of facility takes full account of eliminating the main error source-attenuation effect (including leakage and back diffusion etc.) : not only prevent attenuation and make a relevant correction Therefore the accuracy of determination is assured.The calibration intercomparison of radon flux meter and the quantitively evaluation on the measurement method of radon nux are made to be possible by the successful establishment of this facility.