Speaker
Description
Authors: T. J. Ballé 1, S. Röttger 1, F. Mertes 2, P. P. S. Otáhal 3, P. Kovar 4, A. Röttger 1
Affiliation:
1: Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
2: Bundesamt für Strahlenschutz (BfS), Ingolstädter Landstraße 1, 85764 Oberschleißheim, Germany
3: National Institute for Nuclear, Biological and Chemical protection (SUJCHBO, v.v.i), 262 31 Milin, Czech Republic
4: Czech Metrological Institute (CMI), Regional Branch Prague, Radiová la, 102 00 Prague, Czech Republic
The alpha-decay chain of 222Rn results to the highest dose contribution from natural radiation and by this exposure to the highest natural risk for developing lung cancer. Therefore, precise and quality assured measurements of 222Rn are of great importance and EU member states are required to implement 222Rn mitigation measures according to the European Council Directive 2013/59/EURATOM.
The outdoor 222Rn activity concentration (typically in the range of 1 Bq·m-3 to 100 Bq·m-3) can be used to improve the identification of radon priority areas, where countermeasures are most needed. Despite an enlarging network of 222Rn activity concentration measurements across Europe, traceability to SI at the outdoor level is still lacking.
The EMPIR project 19ENV01 traceRadon addressed this issue and has developed several new 222Rn emanation sources and transfer standards, to be used as primary and secondary calibration standards to calibrate reference instruments at the environmental level with uncertainties below 10 % for k = 1.
In this talk the novel 222Rn emanation sources as well as their implementation as calibration standards for transfer standards will be presented.
Corresponding author e-mail address: Tanita.balle@ptb.de
Proposed session: Quality assurance and uncertainty evaluation in radioactivity measurements or Low-level measurement techniques
Proposed presentation type: Oral
