Evaluation of the 2014 EC measurement comparison on 137Cs in air filters

In 2014, the Joint Research Centre organised an interlaboratory comparison of 137Cs measurement in air filters. This paper describes the context of the European measurement comparisons, as well as the technical implementation. Furthermore, sample treatment and measurements performed by participating laboratories are discussed and finally the evaluation of comparison results is presented. The intercomparison results are such that 71 out of the 76 laboratories (i.e. 93.4%) reported values within ±33% range of the reference value.