Abstract
The contamination of radon (222Rn) originated from the decay chain of the uranium series in water could be serious background source in underground particle physics experiments. We have been developing a system for continuous monitoring of radon in water. We developed a new high-sensitivity radon detector for water by combining an existing high-sensitivity 80 L radon detector for air and membrane degasifier module used for previous version of radon detector for water. The housing component for membrane degasifier has been improved. The background level of the new radon detector for water was measured and it was reduced by approximately half compared to the previous one.
Highlights
The 222Rn is generated from the decay chain of the 238U series and dissolves into water
The current radon detector for continuous monitoring which has been developed in Japan has enough sensitivity for monitoring radon concentration in return water (~10 mBq/m3) from SK tank to its water purification system
It has less sensitivity for monitoring radon in supply water (~1 mBq/m3) from the water purification system to SK tank and sampling water from the cleanest region of SK tank (~0.1 mBq/m3)
Summary
- 19th International Conference on Nuclear Tracks in Solids, Besançon, France, 31 August-4 September 1998 Lee Talbot. - A new method for the determination of the activity of short half-life descendants of radon B M Hartley and M I Hartley. This content was downloaded from IP address 154.13.228.108 on 02/03/2022 at 07:01. 17th International Conference on Topics in Astroparticle and Underground Physics
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