An intercomparison of indoor radon data using NTD and different dynamic recording systems

Indoor radon data monitored with several different recording systems in a controlled cellar were analyzed. The one-room cellar is carved into volcanic rock and presents an almost constant radon emanation throughout the year. Measurements were performed using the AlphaGUARD®, Sun Nuclear® 1027, DOSEman® and RAD7® radon monitors, and CR-39 Lantrack® in a passive integrating detector. The radon concentrations measured by the active detection systems and averaged over the three-month measurement period ranged from 533 to 805 Bq m−3. The response of the passive detector system was a linear function for exposure times of one, two and three months. The data are discussed as a function of changes in the distribution of radon within the cellar and the response characteristics of the detection devices.

► Indoor radon dynamic and Nuclear Tracks passive systems.
► Different systems but close average values for indoor radon measurements.
► Different recording Indoor radon systems.
► Controlled closed room (cellar) to calibrate indoor radon systems.
► Response characteristics of different indoor radon systems.