A convenient and quick implementation 220 RN progeny concentration is stable 220 rn room

Abstract

A 220Rn chamber for conveniently and rapidly achieving stability of the concentration of 220Rn progenies comprises a 220Rn progeny source tank 1, a 220Rn chamber body 2, an aerosol compensation system 3, a small-flow-rate constant-flow pump 4, a flow gas type solid 220Rn source 5, a 220Rn progeny filter 6, a 220Rn progeny sampling pump 7, a progeny filter 8 and a large-flow-rate vacuum pump 9, wherein the 220Rn progeny source tank 1 and the 220Rn chamber body 2 are connected through a silicon tube 10; the aerosol compensation system 3 and the 220Rn progeny source tank 1 are communicated; after the small-flow-rate constant-flow pump 4, the flow gas type solid 220Rn source 5 and the 220Rn progeny filter 6 are sequentially connected, the two ends are communicated with the 220Rn progeny source tank 1 and the 220Rn chamber body 2 respectively; one end of the 220Rn progeny sampling pump 7 is connected with the middle of the 220Rn chamber body 2; the other end of the 220Rn progeny sampling pump 7 is connected with one end of the 220Rn chamber body 2; after the progeny filter 8 and the large-flow-rate vacuum pump 9 are connected in series, the two ends are connected with the ends of the 220Rn chamber body 2. The 220Rn chamber for conveniently and rapidly achieving stability of the concentration of the 220Rn progenies achieves that the concentration of the 220Rn progenies in the 220Rn chamber is high and stable, adjustment is convenient, rapid and reliable, and the rate of the progenies to be attached to the wall is low.

Description

technical field [0001] The present invention relates to an 220 Compensation technology for radioactive aerosol in Rn and its daughter metering device, especially a convenient and quick realization 220 Rn progeny concentration stable 220 Room Rn. Background technique [0002] 220 The Rn compartment is stabilized by 220 Rn source, temperature and humidity system, aerosol generation system and other components can provide different stable and uniform 220 Metering device for the atmospheric environment (reference atmosphere) of the concentration of Rn and its daughters. The device can be widely used in 220 Research on measurement methods of Rn and its daughters, calibration and comparison of measuring instruments. [0003] Currently, the established 220 Rn room can not be well resolved 220 Rn and its sub-body measurement applications 220 The problem of stable regulation of Rn progeny. Common deficiencies include: 220 The loss of Rn daughter body wall attachment is se...

AI Technical Summary

Problems solved by technology

Common deficiencies include: 220 The loss of Rn daughter body wall attachment is serious, 220 The control range of the concentration of the Rn compartment is too small; 212 The half-life of Pb (represented by ThB in the following) is 10.64h. It takes more than 3 days for the daughter body concentration to be adjusted from a certain level to another level to rebuild the balance. It takes a long time for the daughter body concentration to stabilize; daughter body sampling will cause 220 Rn progeny concentration decreased

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