Individual neutron monitoring in workplaces with mixed neutron/photon radiation

EVIDOS (`evaluation of individual dosimetry in mixed neutron and photon radiation elds') is an European Commission (EC)-sponsored project that aims at a signicant improvement of radiation protection dosimetry in mixed neutron/photon elds via spectrometric and dosimetric investigations in representative workplaces of the nuclear industry. In particular, new spectrometry methods are developed that provide the energy and direction distribution of the neutron uence from which the reference dosimetric quantities are derived and compared to the readings of dosemeters. The nal results of the project will be a comprehensive set of spectrometric and dosimetric data for the workplaces and an analysis of the performance of dosemeters, including novel electronic dosemeters. This paper gives an overview of the project and focuses on the results from measurements performed in calibration elds with broad energy distributions (simulated workplace elds) and on the rst results from workplaces in the nuclear industry, inside a boiling water reactor and around a spent fuel transport cask.