Development Priorities for Nde of Concrete Structures in Nuclear Plants
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NEA/CSNIJR(97)28 ~~AEN '--~ NEA DEVELOPMENT PRIORITIES FOR NDE OF CONCRETE STRUCTURES IN NUCLEAR PLANTS NEA WORKSHOP Risley, United Kingdom, 12 November 1997 PRINCIPAL WORKING GROUP N0.3 ON INTEGRITY OF C01\1PONENTS AND STRUCTURES COMMITTEE ON THE SAFETY OF NUCLEAR INSTALLATIONS OECD NUCLEAR ENERGY AGENCY Le Seine Saint-Germain- 12, boulevard des iles F-92130 Issy-les-Moulineaux (France) Tel. (33) 1 45 24 82 00 Fax (33) I 45 24 11 10 1Jnclassified NEA/CSNIIR (97)28 OECD Organisation de Cooperation et de Developpement Economiques OLIS 11-Feb-1998 iiiiTiii Organisation for Economic Co-operation and Development Dist. 13-Feb-]998 OCDE PAIS English text only NUCLEAR ENERGY AGENCY COMMITTEE ON THE SAFETY OF NUCLEAR INSTALLATIONS Cancels & replaces the same document: distributed 13-Feb-1998 DEVELOPMENT PRIORITIES FOR NDE OF CONCRETE STRUCTURES IN NUCLEAR PLANTS NEA WORKSHOP Ris1ey, United Kingdom, 12 November 1997 • ' 61818 Document incomplet sur OLIS Incomplete document on OLIS ORGANJSATJON FOR ECONOMJC. CO-OPERATJON. AND DEVELOPMENT Pursuant to Article J of the Convention signed in Paris on 14th December 1960, and which came into force on 30th September 1961, the Organisation for Economic Co-operation and Development (OECD) shall promote policies designed: to achieve the highest sustainable economic growth and employment and a rising standard of living in Member countries, while maintaining financial stability, and thus to contribute to the development of the world economy; to con.tribute to sound economic expansion in Member as well as non-member countries in the process of economic development; and · to contribute to the expansion of world trade on a multilateral, non-discriminatory basis in accordance with international obligations. The original Member countries of the OECD are Austria, Belgium, Canada, Denmark, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain; Sweden, Switzerland, Turkey, the United Kingdom and the United States. The following countries became Members subsequently through accession at the dates indicated hereafter: Japan (28th April 1964), Finland (28th January 1969), Australia (7th June 1971), New Zealand (29th May'l973), Mexico (18th May 1994) the Czech Republic (21st December 1995), Hungary (7th M~y 1996), Poland (22nd November 1996) and the Republic of Korea (12th December 1996). The Commission of the European Communities takes part in the work of the OECD (Article 13 of the OECD Convention). NUCLEAR ENERGY AGENCY The OECD Nuclear Energy Agency (NEA) was established on 1st February 1958 under the name of the OEEC European Nuclear Energy Agency. It received its present designation on 20th Aprill972, when Japan became its first non-European full Member. NEA membership today consists of all OECD Member countri-es, except New Zealand and Poland. The Commission of the European Communities takes part in the work of the Agency. · The primary objective of the NEA is to promote co-operation among the governments of its participating countries in furthering the development of nuclear power as a safe, environmentally acceptable and economic energy source. This is achieved by: encouraging harmonization of national regulatory policies and practices, with particular reference to the safety of nuclear installations, protection of man 'against ionising radiation and preservation of the environment, radioactive waste management, and nuclear third party liability and insurance; assessing the contribution of nuclear power to the overall energy supply by keeping under review theo technical and economic aspects of nuclear power growth and forecasting demand and supply for the different phases of the nuclear fuel cycle; developing exchanges of scientific and technical information particularly through pa11icipation in common services; . setting up intematiofl!ll research and development programmes and joint undertakings. In these and related tasks, the NEA works in close collaboration with the Intermitional Atomic Energy Agency in Vienna, with which it has concluded a Co-operation Agreement, as well as with other international · organisations in the nuclear field. ©OECD1998 Permission to reproduce a portion of this work for non-commercial purposes or classroom use sho.uld be obtained through Centre franr;:ais d'exploitation du droit de copie (CCF), 20, rue des Grands-Augustins, 75006 Paris, France, for every country except the United States. In the United States permission should be obtained through the Copyright Clearance Center, Inc. {CCC). All other applications for permission to reproduce or translate all or part of this book should be made to OECD Publications, 2, rue Andre-Pascal, 75775 PARIS CEDEX 16, Fnince. NEA/CSNI/R(97)28 COMMJTTEE ON THE SAFETY OF NUCLEAR INSTALLATIONS The NEA Committee on the Safety of Nuclear Installations (CSNI) is an international committee made up of scientists and engineers. It was set up in 1973 to develop and co-ordinate the activities of the Nuclear· Energy Agency concerning the technical aspects of the design, construction and operation of nuclear installations insofar as they affect the safety of such installations. The Committee's purpose is to foster international co-operation in nuclear safety amongst the OECD Member countries. CSNI constitutes a forum for the exchange of technical information and for collaboration between organisations which can contribute, from their respective backgrounds in research, development, engineering or regulation, to these activities and to the definition of its programme of work. It also reviews the state of knowledge on selected topics of nuclear safety technology and safety assessment, including operating experience. It initiates and conducts programmes identified by these reviews and assessments in order to overcome discrepancies, develop improvements and . reach international consensus in different projects and International Standard Problems, and assists in the feedback of the results to participating organisations. Full use is also made of traditional methods of co-operation, such as information exchanges, establishment of working groups and organisation of conferences and specialist meeting. The greater part of CSNI's current programme of work is concerned with safety technology of water reactors. The principal areas covered are operating experience and the hu~an factor, reactor coolant system behaviour, various aspects of reactor component integrity, the phenomenology of radioactive. :r:eleases in reactor accidents and their confinement, containment performance, risk assessment and severe accidents. The Committee also studies the safety of the fuel cycle, conducts periodic surveys of reactor safety research programmes and operates an international mechanism for exchanging reports on nuclear power plant incidents. In implementing its programme, CSNI establishes co-operative mechanisms with NEA's Committee on Nuclear Regulatory Activities (CNRA), responsible for the activities of the Agency concerning the regulation, licensing and inspection of nuclear installations with regard to safety. It also co-operates with NEA' s Committee on Radiation Protection and Public Health and NEA' s Radioactive Waste Management Committee on matters of common interest. 3 NEA/CSNIIR(97)28 4 NEA/CSNI/R(97)2r: FOREWORD ·This work'lhop was hosted by the UK Health and Safety Executive Nuclear Safety Division. It was sponsored by Principal Working Group 3 (PWG-3), of the NEA CSNI. It was organised by AEA Technology and held at AEA Technology Risley. · PWG-3 deals with the integrity of structures and components, and has three sub-groups, dealing with the jntegrity of metal structures and components, ageing of concrete structures, and the seismic be.haviour of structures. A status report on the ageing of concrete NPP structures was prepared during 1995 by a task group to initiate activities in this field under PWG3. The ·topic of Non Destructive Examination was identified as one of the highest priority issues, and accordingly it was decided to organise this workshop. The other first priority topic was loss of tendon prestress, and a workshop to address this was also organ~ sed in 1997. This document is published under the responsibility of the Secretary-General of the OECD. 5 NENCSNIIR(97)28 6 NEA/CSNIIR(97)28 Table of contents Page Introduction 9 Session 1: NlJCLEAR NDE.REQUIREMENTS 11 Judge, AEA; Philipose, AECL; Beep, NOK; Rodriguez, Geocisa; Norris, USNRC; Nefedov, GAN Session 2: IDENTIFYING NDE CAPABILITY & TECHNICAL DEVELOPMENTS · 19 Tomographic Imaging for Investigation of Concrete Structures Michael Schuller, Atkinson-Noland Consulting Engineers, US 27 Four examples of modern NDE Techniques applied to the investigation of nuclear and non-nuclear concrete structures and a vision of future improvements Peter Shaw, STK Inter Test AB, Sweden 29 Investigating concrete structures by 3D RADAR imaging and imaging using mechanical impact Ulrika Wi.berg, Vattenfall Utveckling AB, Sweden 41 Synopsis NDT of concrete using Ultrasonics and RADAR Brian Hawker, AEA Technology, UK 43 Session 3: PRIORITISING DEVELOPMENTS 45 Key conclusions from earlier sessions Les Smith, Scottish Nuclear, UK, John Bungey. University of Liverpool, UK Proposed priorities and next steps Richard Judge, AEA Technology, UK APPENDICES Programme 49 List of participants 53 Presentations 57 7 NEA/CSNI/R(97)28 Table of Contents (contd.) Page Session 1 66 Philipose 71 Heep 79 Rodriguez 83 Norris 95 Nefedov -113 Session 2 121 Schuller 122 . Wiberg 129 Hawker·