COMPARATIVE OBSERVATION OF DDL-2 AND FD-125 RADON METERS:A CASE STUDY OF SHUIMOGOU 15 SPRING IN XINJIANG
The instrument used to measure radon in the underground fluid chamber of the Geophysical Observation Center of Earthquake Agency of Xinjiang Uygur Autonomous Region is FD-125,which was purchased in 1979.Due to the serious aging of the instrument for a long time,there is no spare instru-ment and no manufacturer to replace it.If the instrument fails to be repaired in time and there is a lack of spare observation instruments,it will cause data disconnection and affect the overall scientific quality of observation data.Therefore,in this paper,the water sample of Shuimogou 15 spring in Xin-jiang is taken as the measurement object,and the DDL-2 radon detector is introduced to detect and compare with the FD-125 radon detector under the same environmental conditions.The results show that the DDL-2 radon monitor has stable performance and small fluctuation range of measured values,which can meet the requirements of precursory observation specifications and correctly reflect the change of radon content in groundwater.It is considered that the DDL-2 radon monitor has the poten-tial to replace the FD-125 radon monitor as the daily measurement instrument of water radon.
Radon meterPrecursor observationShuimogou15 Spring
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