An innovative quick method for tracable measurement of radon 222 in drinking water.

In this work, a quick and simple low-level radionuclide metrology technique for the traceable measurement of Rn-222 activity concentration in drinking water using a 0.56 l ionisation chamber operating in spectrometric pulse mode has been developed, tested, verified and applied to 16 water samples successfully. The impact of essential influencing factors on the result has been investigated, discussed and considered in the uncertainty budget of the measurement method.

Comparison of I activity measurements at the NCBJ RC POLATOM and the ENEA-INMRI linked to the BIPM SIR system.

A bilateral comparison between ENEA-INMRI (Italy) and NCBJ RC POLATOM (Poland) of I-solution activity measurements was organized in the year 2015 and piloted by POLATOM, which provided the sources for the comparison. The I master solution was standardized independently at both institutes by using Liquid Scintillation Counting and ionization chamber techniques. The I master solution was then sent by POLATOM to the BIPM International Reference System (SIR).

A step towards accreditation: A robustness test of etching process.

In the present study the robustness of the etching process used by our laboratory was assessed. The strategy followed was based on the procedure suggested by Youden. Critical factors for the process were estimated using both Lenth's method and Dong's algorithm.