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European network for inspection qualification (ENIQ)


Specific Objectives

To prepare the network for ERA and FP6 and establish a new strategy for the networks supporting the increased importance of enlargement and RI-ISI

- Amendment to the multi-party collaboration agreement for the network in order to account of the participation of CEEC organisations;
- Study of risk-informed concepts and their influence on and link to inspection qualification;
To support the harmonisation and improvement of inspection qualification techniques

- To execute and finalise phase I of ENIQ second pilot study on a full-scale test piece (BWR nozzle to shell weld component), explore the possibilities to base an inspection qualification on Technical Justification;
- To draw up recommended practices for inspection qualification based upon the general principles of European methodology as developed by ENIQ on relevant issues;
- To perform a detailed analysis on the relation and difference between real and synthetic defects used for the practical trials of an inspection qualification exercise;
- To develop experimental facilities and expertise to meet challenges in current inspection problems, with a focus on inspect ability of Inconel weldments;
To promote technology transfer through networking

- Set up of an international database of available qualification test pieces in co-operation with IAEA and EPRI;
- Participation in related SCAs SPIQNAR and NURBIM;
- Dissemination of results through ENIQ by training and workshops

To foster closer cooperation with DG RTD nuclear safety activities.
Planned Deliverables

Specific deliverables to DGs:

- Proposal to DG TREN on how to support harmonization of the internal electricity market through transfer of research results to codes and standards;
- Participation in regular and specific meetings to keep up co-operation between Nuclear Regulators Working Group and ENIQ Network (DG TREN);
- Technology transfer in Europe and towards Central and Eastern European countries (DG TREN/ DG ELARG);
- Expansion and update of the experimental facilities (linear accelerator X-ray machine for inspection of thick walled nuclear components and a state-of-the-art phased array ultrasonic inspection system for training and experimentation), in support of the co-operation with candidate country partners;
- Recommended practices, promoting a harmonised praxis in Europe on inspection qualification;
- Establishment of a European framework document on RI-ISI for a harmonized approach.

As a result of the research:

- Report on the link between RI-ISI and inspection qualification.
- Report on the "truly unknown" in relation to the application of RI-ISI;
- Report on Influence of BWR vessel cladding on ultrasonic inspection.
- Report on the inspection of a BWR Nozzle-to-shell weld;
- Final report on a Technical Justification for ENIQ 2nd pilot study;
- Report on the comparison between predictions in the technical justification and measurements on inspection results;
- Report on recommended practice related to inspection qualification;
- Document with a European Approach on RI-ISI;
- Final report of Phase 1 of ENIQ 2nd pilot study.

Summary of 2001 Deliverables: 31/12/2001

- The successful operation of the ENIQ network continued, with a preparation for a new strategy and changing structure of the network, taking into account a change in activities, especially the emerging interest in RI-ISI;

- Preparation, circulation and analysis of a questionnaire on EU and CC research needs in RI-ISI, inspection qualification and current ISI problems;

- Progress on the 2nd Pilot study: manufacture of a full scale BWR Nozzle-to-shell weld test block with introduction of under clad defect; development of an inspection procedure, development of a draft Technical justification;

- Inspection and examination of pipes with real service induced stress corrosion cracks;

- Development of a Recommended Practice on the general requirements for qualification of non-destructive tests;

- Discussion document for a European approach on Risk- Informed ISI;

- Technology transfer on inspection qualification to CC and NIS: Technical support to IAEA regional project and workshop for VVER reactors, with meetings in Brno, Czech Republic and Sofia, Bulgaria. Major technical contribution to a regional seminar, hosted by Kozloduy NPP, Bulgaria, in co-operation with UK Department of Trade;

- Cooperation agreement with IAEA (in support of CC and NIS) and EPRI to develop an international database on qualification test pieces;

- Workshop with selected representatives of CCs research organisation on Integration opportunities for CC into IE activities, in co-operation with NESC and AMES;

- Participation and presentation of articles in international conferences.

Output Indicators and Impact


Output indicators

(Specific actions taken)

Impact (long term results)

To prepare the network for ERA and FP6 and establish a new strategy for the networks supporting the increased importance of enlargement and RI-ISI

- Higher involvement of the CC in the network activities;

- Amendment of the multi-partner agreement for the network in order to account for the participation of CC organisations;

- One Workshop/Tutorial on (RI-ISI), specifically targeting candidate countries;

- Implementation of ERA and integration of CC into EU nuclear safety culture;

- Support to CC in the integration of new concepts and methodologies in nuclear safety;

To promote technology transfer through networking;

- Number of papers presented at international conferences;

- Continued involvement in related SCAs SPIQNAR and NURBIM;

- Number of visits to modernised and updated ENIQ Website;

- Set up of an international database of available qualification test pieces in co-operation with IAEA and EPRI;

-Strengthened and consolidated reference laboratory on the issue of inspection qualification;

-To support the harmonisation and improvement of inspection qualification techniques;

- European Methodology on Inspection qualification and associated recommended practices referenced by EU nuclear regulator;

-Direct support to EU policies and harmonisation of EU internal market for electricity supply.
Summary of the project

The project focuses on the inspection part of the overall structural integrity approach for nuclear reactor pressure boundaries by addressing aspects like reactor safety and the need for harmonisation in an enlarged Union and internal electricity market. The ENIQ network, with more than 40 participating organisation in 14 countries (including 4 CCs), has been set up to group all the major organisations in the field with the main capabilities in the field of inspection qualification and risk-informed in-service inspection (RI-ISI). The network co-ordinates fragmented national research and manages available resources and expertise at European level.

Work is carried out on RI-ISI, e.g. the process for development of inspection programs, which takes into account the specific risk associated with all the possible inspection areas, thus optimising and targeting the actual inspection - inspection areas, techniques and intervals - in terms of safety and efficiency. Work is also carried out on inspection qualification, to support candidate countries and to harmonise the safety culture in this field. The need for such initiative, to develop methodologies and system to ensure the reliability of the chosen NDT system, has been shown by several international studies, e.g. Programme for the Inspection of Steel Components (PISC). ENIQ supports a European harmonisation of codes and standards in these fields, including the candidate countries, through the performed research work and the dissemination of results. ENIQ will also interact with recognised international organisations in the field like IAEA, OECD-NEA and EPRI. ENIQ maintains its links to the other networks NESC, EPERC and AMES.

See also the related EU enlargement process pre-accession (pa) project.


Structural integrity of the primary circuits of a NPP is a primary safety goal from an environmental and citizens safety view and in-service inspection is an integral part of the set of measures to fulfil this goal. This calls for a proper selection of areas to be inspected and reliable inspection systems to be applied. The internal market for electricity puts economic pressure on electricity producers, which calls for harmonisation of efficient inspection programming and in-service inspection (ISI). The enlargement of the EU, to include countries with a different safety culture, calls for a European harmonisation of safety culture and technology transfer.
Thus, the work in ENIQ is motivated by the need to develop and harmonise reliable and efficient methods and procedures for inspection related issues.


Institute for Energy
Institute For Energy