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Evaluation of Individual Dosimetry in Mixed Neutron and Photon Radiation Fields (EVIDOS), Summary of final report

Project ID: FIKR-CT-2001-00175
Funded under: FP5-EAECTP C


The EVIDOS Project, supported by the European Commission within the Fifth Framework Programme, aimed at evaluating state-of-the-art dosimetry techniques in representative workplaces of the nuclear industry with mixed neutron/photon radiation. Seven European institutes with recognised expertise in radiation protection instruments and methods joined efforts with end users at nuclear power plants, at fuel processing and reprocessing plants, and at transport and storage facilities. A major task of the project was to develop methods to characterise the neutron component of mixed radiation fields at workplaces and to derive reference values of radiation protection quantities from energy and direction distributions of t he neutron fluence.
Workplaces in the nuclear industry where workers can receive significant neutron doses were selected, and the following tasks were carried out:
- determination of the energy and direction distribution of the neutron fluence
- derivation of the (conventionally true) values of radiation protection quantities
- determination of the readings of routine and innovative personal dosimeters and of area monitors
- comparison between dosimeter readings and values of the radiation protection quantities.
The results from the project allow an evaluation of the accuracy of dosimetry in mixed neutron/photon radiation fields using routine and innovative dosimetric equipment.

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