OECD/NEA Component Operational Experience, Degradation and Ageing Programme (CODAP) Project

The OECD Component Operational Experience, Degradation and Ageing Programme (CODAP) aims to combine the follow-up of two previous OECD projects: the OECD Pipe Failure Data Exchange Project (OPDE) and the Stress corrosion cracking (SCC) part of the SCC and Cable Ageing Project (SCAP).

The OECD Pipe Failure Data Exchange Project (OPDE) was established in May 2002 to produce an international database on the piping service experience applicable to commercial nuclear plants. OPDE which is operated under the umbrella of the NEA has been run successfully for eight years and has collected more than 3,700 piping events. Currently 11 countries have signed the OPDE agreement for the third term June 2008 – May 2011 (Canada, Czech Republic, Finland, France, Germany, Republic of Korea, Japan, Spain, Sweden, Switzerland and the United States of America). The OPDE project will be completed at the end of May 2011.

In 2006 the SCAP project was established by the NEA to assess two subjects, stress corrosion cracking (SCC) and degradation of cable insulation, due to their implication on nuclear safety and their relevance for plant ageing management. The project ran successfully from June 2006 to June 2010. Fourteen NEA member countries joined the SCAP project in 2006 to share knowledge and by 2010 seventeen countries had joined the project. The International Atomic Energy Agency (IAEA) and the European Commission also participated as observers.

Following the completion of the SCAP project, SCC participants were interested in some form of continuation and discussions were initiated to explore possible alternatives. It was recognised that there are many similarities between the OPDE and SCAP SCC projects and therefore, the concept of a new project was envisaged to combine the two projects into a new project called: OECD Component Operational Experience, Degradation and Ageing Programme (CODAP).

Building on the success of OPDE and SCAP SCC, the objectives of the proposed CODAP project are to:

  1. Collect information on passive metallic component degradation and failures of the primary system, reactor pressure vessel internals, main process and standby safety systems, and support systems (i.e., ASME Code Class 1, 2 and 3, or equivalent), as well as non safety-related (non-code) components with significant operational impact;
  2. Establish a knowledge base for general information on component and degradation mechanisms such as applicable regulations, codes and standards, bibliography and references, R&D programmes and pro-active actions, information on key parameters, models, thresholds and kinetics, fitness for service criteria, and information on mitigation, monitoring, surveillance, diagnostics, repair and replacement; and
  3. Develop topical reports on degradation mechanisms in close coordination with the CSNI Integrity and Ageing of Components and Structures Working Group (WGIAGE).

Participating countries

Canada, Chinese Taipei, Czech Republic, Finland, France, Germany, Republic of Korea, Japan, Slovak Republic, Spain, Sweden, Switzerland and United States of America. Other countries are being consulted.

Project Period

June 2011 to December 2014


EUR 0.12 million per year

Related links

NEA contact

Axel Breest

Last reviewed: 22 October 2013