Feasibility study of DDL-1 gas radon meter applied to daily observation of gas radon measurement in Jiayuguan faults
Shang Junbin
Ma Lan
Zhang Qiaoli
Cao Xi
Li Yangyang
Zhang Guiwen
Gong Dandan
Abstract：To address issues associated with scintillation chamber radon measurement instru-ments-such as complex observation procedures,time-consuming background reduction,inac-curate solid-source activity,imprecise instrument calibration,and cumbersome calculation pro-cesses.Jiayuguan seismic monitoring station conducted experimental research using the DDL-1 gas radon meter.The study compared the DDL-1 gas radon meter with the FD-125 radon-thoron analyzer in terms of working principles,key technical parameters,calibration procedures,and data stability.The results indicate that the DDL-1 gas radon meter offers significant advantages in instrument calibration,with simplified operation and automatic K-value calculation,effect-ively shortening calibration time.Under fixed time and quantitative observation modes,the observation curves of both instruments were synchronized,and the DDL-1 detector operated stably.However,despite notable improvements in background reduction,the DDL-1 gas radon meter still faced challenges in reducing background levels under high temperatures.Addition-ally,during continuous measurements,the detector's readings consistently declined,and its air inlet pipes were prone to freezing in winter,which prevented year-round continuous observa-tions.Consequently,the DDL-1 gas radon meter is not yet suitable for daily continuous monit-oring of radon in the Jiayuguan fault.
Keywords：DDL-1 gas radon meterFD-125 radon-thoron analyzerfault gas radonapplicability
Publication Date：2025-02-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 145-151 )