[en] This report first describes the organisation and management of radiation protection at Sizewell Nuclear Power Plant (UK): general organisation, organisation of the radiation protection department, goals of radiation protection at plant and corporate levels, measurement of radiation protection performance, presence of health physicists in the plant, national and international comparisons. Then, it addresses the training of workers and radiation protection specialists with respect to radiation protection, the management of zoning and surveillance (action to address the radiation risk and the contamination risk). It describes the relationships of Health physicists with contractors and other workers teams, and the relationships with safety authorities. It indicates the different outages of this organisation: general planning, information sheets, physicists work planning, reviews and meetings. It describes the management of personal dosimetry with radiation work permits and actions aimed at the reduction of doses during various operations. The last part proposes a feedback experience report and evokes the generated database, and addresses events reporting

[en] The turbine system, which represents a weight of 3500 tonnes for a 900 MW unit and 4000 tonnes for the 1300 MW units, is supported by a concrete socle of which structure varies as a function of the machine type. Rotors and stators are perfectly aligned during the construction, but during operation life, the alignment is affected by foundation deformations, ground subsiding and operation conditions. Such misalignments may induce anomalistic operation and reduce machine lifetime. The different socle designs, the anomaly correction methods in order to recover an acceptable alignment and the deformation maintenance principles, are presented

[en] Since the beginning of the 90 s, EDF has made great efforts to improve ALARA for occupational exposures in the French nuclear power plants. This resulted in the important reduction of the individual doses (581 workers received more than 20 mSv in 1996; in 2006 no one received more than 20 mSv and only 17 received more than 16 mSv) and of the average collective dose per reactor (reduction by more than a factor two in ten years). EDF wishes to continue its efforts. One of the ways of improvement is the analysis of the feedback experience in the foreign power plants having good dosimetric results or with a recent significant improvement of the dosimetric results. Thus, between 2003 and 2006, the C.E.P.N. has organized for EDF eight benchmarking visits on the organisation and practical implementation of radiation protection in foreign nuclear power plants. For each visit, a team composed of two representatives from EDF and two representatives from C.E.P.N., goes to the site during a week and meets representatives of services implied in the implementation of the specific topic, which was selected. Several good practices of radiation protection were identified during these visits: the good integration of radiation protection in the management of the plant; the efforts in reducing the source term; the fundamental impact of the reduction of exposed volumes of work through the optimisation of the maintenance programmes and modification of the design reducing the necessity of maintenance; a close and experienced radiological protection; new tools in the service of radiological protection for the 21. century, in particular the use of remote monitoring systems. (authors)

[en] This day on the workstations studies for the workers follow-up, was organised by the research and health section. Devoted to the company doctors, for the competent persons in radiation protection, for the engineers of safety, it presented examples of methodologies and applications in the medical, industrial domain and the research, so contributing to a better understanding and an application of regulatory measures. The analysis of the workstation has to allow a reduction of the exposures and the risks and lead to the optimization of the medical follow-up. The agenda of this day included the different subjects as follow: evolution of the regulation in matter of demarcation of the regulated zones where the measures of workers protection are strengthened; presentation of the I.R.S.N. guide of help to the realization of a workstation study; implementation of a workstation study: case of radiology; the workstation studies in the research area; Is it necessary to impose the operational dosimetry in the services of radiodiagnostic? The experience feedback of a competent person in radiation protection (P.C.R.) in a hospital environment; radiation protection: elaboration of a good practices guide in medical field; the activities file in nuclear power plant: an evaluation tool of risks for the prevention. Methodological presentation and examples; insulated workstation study; the experience feedback of a provider; Contribution of the ergonomics to the determiners characterization in the ionizing radiation exposure situations;The workstations studies for the internal contamination in the fuel cycle facilities and the consideration of the results in the medical follow-up; R.E.L.I.R. necessity of workstation studies; the consideration of the human factor. (N.C.)