Preprints
https://doi.org/10.5194/egusphere-2023-1158
https://doi.org/10.5194/egusphere-2023-1158
11 Jul 2023
 | 11 Jul 2023

Two new 222Rn emanation sources – a comparison study

Tanita Johanna Ballé, Stefan Röttger, Florian Mertes, Anja Honig, Petr Kovar, Petr Otáhal, and Annette Röttger

Abstract. More than 50 % of natural occurring radiation exposure of the general public is due to the noble gas radon (222Rn) and its progenies, causing considerable health risks. Therefore, the European Union has implemented council directive 2013/59/EURATOM to measure 222Rn activity concentrations and to identify Radon Priority Areas (RPAs) to specify areas where countermeasures are most needed. Although 222Rn measurements are far spread across Europe, traceability to the international system of units (SI) is still lacking. Consequently, measurement results cannot be reliably compared to each other. The EMPIR project 19ENV01 traceRadon aims to address this issue and has developed two new 222Rn emanation sources, intended to be used as calibration standards for reference instruments. The goal of this paper is to investigate and compare the two sources to ensure their quality by comparing the calibration factors estimated from both sources for the same reference instrument. This was done for three reference instruments in total at two experimental sites. Differences of calibration factors for one reference instrument of up to 0.07 were derived. Despite the small differences between the calibration factors, all uncertainties are well within the aspired target uncertainty of 10 % for k = 1.

Tanita Johanna Ballé, Stefan Röttger, Florian Mertes, Anja Honig, Petr Kovar, Petr Otáhal, and Annette Röttger

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1158', Anonymous Referee #1, 23 Oct 2023
    • AC2: 'Reply on RC1', Tanita Ballé, 08 Nov 2023
  • RC2: 'Comment on egusphere-2023-1158', Ileana Radulescu, 24 Oct 2023
    • AC1: 'Reply on RC2', Tanita Ballé, 08 Nov 2023

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1158', Anonymous Referee #1, 23 Oct 2023
    • AC2: 'Reply on RC1', Tanita Ballé, 08 Nov 2023
  • RC2: 'Comment on egusphere-2023-1158', Ileana Radulescu, 24 Oct 2023
    • AC1: 'Reply on RC2', Tanita Ballé, 08 Nov 2023
Tanita Johanna Ballé, Stefan Röttger, Florian Mertes, Anja Honig, Petr Kovar, Petr Otáhal, and Annette Röttger
Tanita Johanna Ballé, Stefan Röttger, Florian Mertes, Anja Honig, Petr Kovar, Petr Otáhal, and Annette Röttger

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Short summary
More than 50 % of natural occurring radiation exposure is due to 222Rn (progenies), but traceability of measurements to the SI is lacking. To address this two new 222Rn sources were developed, intended to be used as calibration standards for reference instruments. The two sources were investigated by comparing the calibration factors estimated from both sources for one instrument. Despite the derived small differences, all uncertainties are well within the aspired target uncertainty of 10 %.