Task 5.2: Validation of the traceability, performance and precision of European radon calibration facilities in the range from 300 Bq/m3 to 10 000 Bq/m3

The aim of this task is to validate traceability of European radon calibration facilities and to demonstrate their performance in calibrating radon measuring instruments in the range from 300 Bq/m3 to 10 000 Bq/m3, as well as the closeness of agreement between the calibration results (precision).
An intercomparison will be conducted for that purpose of validation of the traceability. The participating calibration facilities selected in Task 5.1, will preferably be situated in different Member States and should represent the respective national reference for the quantity radon activity concentration in air. A suitable transfer standard will be selected and the organisations selected in Task 5.1 will be contacted with the aim of ensuring participation of at least 7 radon calibration facilities. The protocol for the comparison will be developed and agreed, the transfer standard circulated to the participants for their measurements and the results analysed.