[en] At its first meeting in May 2008, the Working Group discussed a task to 'Prepare a report reviewing the various practices used by regulators in the regulation of nuclear power plant siting. The report should consider regulator practices on sites where a mixture of activities are taking place (e.g. operating units, new construction, decommissioning, etc) including organization of the regulators organisation, methods, systems, etc.'. Following discussion, the Working Group assigned an Action 1-5 to 'develop a survey on the regulation of nuclear sites including seismicity issues, security issues, multi-units aspects and regulator practices on sites where a mixture of activities are taking place (e.g. operating units, new construction, decommissioning, etc.)'. The Survey was prepared and issued by the NEA in July 2008 with a request to the member states to provide their responses by the next meeting of the Working Group in October 2008. In addition to addressing the specific topics actioned by the Working Group, the Survey also investigated the broader context of siting, in order to address the Mandate that had been approved by the CNRA. The questions in the survey therefore covered the topics of site evaluation, site selection, regulatory approval, site preparation and regulatory oversight. A topic of particular interest was to what extent IAEA guidance on site evaluation was followed. The survey considered the possibility that a body other than the safety regulator may approve the choice of site or permit the applicant to start to prepare it. The survey also investigated the existence of formal requirements and informal expectations, recognizing that these both form part of the regulatory tool-kit. Responses were received from all twelve member states that were then members of the Working Group. The responses were reviewed at the second meeting of the Working Group in October 2008. In general, it could be stated that new reactors are licensed in several stages, often with separate licenses. Site selection and preparation are regulated in almost all states, either directly or indirectly. Site selection is approved by one means or another, though not always by the safety regulator and not always formally (sometimes 'consent' is given). Consideration of alternative sites is sometimes required. Public consultation is generally required and some form of environmental assessment is needed prior to site approval in all cases. Site preparation activities are generally defined and controlled by the safety regulator. Regulatory guidance for oversight of site preparation exists in many member states. Discussion at the second meeting identified a number of topics that might benefit from further investigation, namely: - Public consultation/involvement, - Definition of construction, site preparation, - Impact of the site on the design. No immediate action on these topics was assigned at the time. The first version of this report was issued in January 2009 for review and comment by the Working Group members, based on the responses provided in response to the initial questions. At the third meeting of the Working Group in March 2009, an Action was placed to prepare further questions, to investigate aspects such as public consultation/involvement, definition of site preparation/construction and impact of the site on the design. Actions were also placed on the member states to review their existing answers to make their responses more consistent and homogeneous. This report was updated in May 2009 for presentation to CNRA on 8-9 June 2009, which approved the additional work. The extra questions were issued by NEA on July 15, 2009 and were answered by the member states in the period ending November 2009. Since the initial survey, the membership of the Working Group had grown to fifteen states, so the new members answered the full set of questions. The overall survey, comprising both the original and additional questions, is given in Appendix A. The report was discussed further at the fourth meeting of the Working Group in September 2009, where it was decided to ask each Member State to prepare a half-page summary of their response, addressing four questions: - How are sites evaluated? - How is the preferred site selected? - How is the preferred site licensed or permitted? - How does the safety regulator oversee site preparation activities?