The mandate of this working group is to advise the CSNI on the topical basis for management of plant ageing and to propose general principles to maintain the integrity of systems and components. The main topics investigated in this area include metal components, concrete structures, seismic behaviour of structures and components and the ageing of wire systems.
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 on Integrity of Components and Structures 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 main topics investigated by this working group include: the integrity of metal components; the integrity and ageing of concrete structures; and the seismic behaviour of structures and components.
Lifetime management remains an important topic for the working group. A status report on risk-informed, in-service inspection (RI-ISI) methodologies was completed, and the group is now actively working on a benchmark study on RI-ISI methodologies. Reactor pressure vessel integrity is being addressed through a benchmark on probabilistic structural integrity methods.
An extensive report on concrete containment integrity was issued during 2006. The workshop on corrosion and long-term performance of reinforced concrete in nuclear waste facilities held in Cadarache, France on 27-30 March 2006 provided insights on structural and regulatory issues.
The workshop on seismic input motions, incorporating recent geological studies was held in Japan on 15-17 November 2005 and completed a series of workshops on seismic input motions. Methods to calculate seismic input motions for nuclear power plants and related uncertainties continued to be explored through close co-operation with geologists and seismologists.
The integrity of metal components and structures sub-group's recent activities include:
The integrity and ageing of concrete structures sub-group has recently been focusing on the preparation of a strategy report that identifies and ranks challenges for concrete structures for operating and new and advanced reactors.
The seismic behaviour of structures and components sub-group's recent activities include:
PROCEEDINGS of the NEA/IAEA Workshop on "Soil Structure Interaction (SSI) Knowledge and Effect on the Seismic Assessment of NPPs Structures and Components" OTTAWA, CANADA, 6-8 OCTOBER 2010
Proceedings of the Workshop on Ageing Management of Thick Walled Concrete Structures, ISI, Maintenance and Repair, Instrumentation Methods and Safety Assessment in View of LTO. Prague, Czech Republic, 1-3 October 2008
PROCEEDINGS of the Workshop on Risk-Informed Piping Integrity Management Madrid, Spain, 2-4 June 2008
PROCEEDINGS of the Workshop on Recent Findings and Developments in Probabilistic Seismic Hazards Analysis (PSHA) Methodologies and Applications Lyon, France, 7-9 April 2008
Summary Report on OECD/NEA Seismic Workshops
Working Group on Integrity of Components and Structures (IAGE)
Seismic engineering knowledge transfer seminar
Nuclear Research Institute Rez, Czech Republic
21-25 November 2011
Last reviewed: 10 April 2014