The main mission of the Working Group on Integrity and Ageing of Components and Structures (WGIAGE) is to advance the current understanding of those aspects relevant to ensuring the integrity of structures, systems and components under design and beyond design loads, to provide guidance in choosing optimal ways of dealing with challenges to the integrity of operating new nuclear power plants, and to make use of an integrated approach to design, safety and plant life management.
The working group shall report to CSNI and assist the committee with its work. With prior approval of CSNI, the working group shall collaborate with or respond to requests from the CSNI Programme Review Group, working groups and other NEA committees or other international organizations.
OECD member country representatives are joined at the group's meetings by representatives from the IAEA, the European Commission and JRC Petten.
The working group has a general mandate to reflect on the logical basis for the maintenance of the integrity of nuclear power plant components, systems and structures, and to propose general principles on the optimal ways of dealing with challenges to integrity – in particular those from ageing. Specifically, the mandate will be the following:
The WGIAGE consists of a main group three subgroups dealing with: a) integrity and ageing of metal structures and components; b) integrity and ageing of concrete structures and; c) seismic and other external events behaviour of components and structures. All subgroups deal with the structural integrity issues in a broad sense, and although disciplines are similar (e.g. structural mechanics and materials behaviour), the expertise needed to address group-specific issues is different. The main group serves as an entry point for CSNI. CSNI technical goals related to ageing, which are not covered by the sub-group work, will be managed by the time-limited task groups coordinated by the main group.
The principal mechanisms currently used by the working group to accomplish its objectives are: a) the conduct of meetings (including annual group meetings and specialist expert meetings and workshops) to share information and plan/coordinate/manage activities; b) the collaborative writing of consensus documents (e.g. state-of-the-art reports, technical reports and technical opinion papers) and; c) highlights related to the integrity and ageing of components and structures via technical notes.
The main group's recent activities include:
The integrity of metal components and structures sub-group's recent activities include:
The integrity and ageing of concrete structures sub-group's recent activities include:
The seismic behaviour of components and structures sub-group's recent activities include:
Improving Robustness Assessment Methodologies for Structures Impacted by Missiles (IRIS_2012), Final Report
Proceedings of OECD/NEA WIAGE Workshop on the Non-Destructive Evaluation of Thick-walled Concrete Structures Prague, Czech Republic 17-19 September 2013 (forthcoming)
Summary report on workshop PSA of Natural External Hazards Including Earthquake, held in Prague in June 2013 (forthcoming)
Proceedings of the Second Workshop on Seismic Observation in Deep Boreholes and Its Applications, 7-9 November 2012 at the Niigata Institute of Technology, Kashiwazaki, Japan
Proceedings of the First Workshop on Seismic Observation in Deep Borehole and Its Applications, 25-26 November 2010 at the Niigata Institute of Technology, Kashiwazaki, Japan
CSNI Technical Opinion Paper No. 15 - Ageing Management of Fuel Cycle Facilities
Improving Robustness Assessment Methodologies for Structures Impacted by Missiles (IRIS_2010), Final Report
Proceedings of the CSNI Workshop on Soil Structure Interaction (SSI) Knowledge and Effect on the Seismic Assessment of NPPs Structures and Components, Ottawa, Canada, 6-8 October 2010
Workshop on the Benefit of Bayesian Updating Techniques for Seismic Hazard Assessment
Pavia University, Italy
Last reviewed: 10 September 2014