Global Status of Decommissioning of Nuclear Installations
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Global Status of Decommissioning of Nuclear Installations - IAEA
GLOBAL STATUS OF
DECOMMISSIONING OF
NUCLEAR INSTALLATIONS
IAEA NUCLEAR ENERGY SERIES NW-T-2.16
GLOBAL STATUS OF
DECOMMISSIONING OF
NUCLEAR INSTALLATIONS
INTERNATIONAL ATOMIC ENERGY AGENCY
VIENNA, 2023
COPYRIGHT NOTICE
All IAEA scientific and technical publications are protected by the terms of the Universal Copyright Convention as adopted in 1952 (Berne) and as revised in 1972 (Paris). The copyright has since been extended by the World Intellectual Property Organization (Geneva) to include electronic and virtual intellectual property. Permission to use whole or parts of texts contained in IAEA publications in printed or electronic form must be obtained and is usually subject to royalty agreements. Proposals for non-commercial reproductions and translations are welcomed and considered on a case-by-case basis. Enquiries should be addressed to the IAEA Publishing Section at:
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© IAEA, 2023
Printed by the IAEA in Austria
March 2023
STI/PUB/2023
IAEA Library Cataloguing in Publication Data
Names: International Atomic Energy Agency.
Title: Global status of decommissioning of nuclear installations / International Atomic Energy Agency.
Description: Vienna : International Atomic Energy Agency, 2023. | Series: IAEA nuclear energy series, ISSN 1995–7807 ; no. NW-T-2.16 | Includes bibliographical references.
Identifiers: IAEAL 23-01572 | ISBN 978–92–0–104623–9 (paperback : alk. paper) | ISBN 978–92–0–104723–6 (pdf) | ISBN 978–92–0–104823–3 (epub)
Subjects: LCSH: Nuclear facilities — Decommissioning. | Nuclear reactors — Decommissioning. | Nuclear power plants — Decommissioning.
Classification: UDC 621.039.59 | STI/PUB/2023
FOREWORD
The IAEA’s statutory role is to seek to accelerate and enlarge the contribution of atomic energy to peace, health and prosperity throughout the world
. Among other functions, the IAEA is authorized to foster the exchange of scientific and technical information on peaceful uses of atomic energy
. One way this is achieved is through a range of technical publications including the IAEA Nuclear Energy Series.
The IAEA Nuclear Energy Series comprises publications designed to further the use of nuclear technologies in support of sustainable development, to advance nuclear science and technology, catalyse innovation and build capacity to support the existing and expanded use of nuclear power and nuclear science applications. The publications include information covering all policy, technological and management aspects of the definition and implementation of activities involving the peaceful use of nuclear technology.
The IAEA safety standards establish fundamental principles, requirements and recommendations to ensure nuclear safety and serve as a global reference for protecting people and the environment from harmful effects of ionizing radiation.
When IAEA Nuclear Energy Series publications address safety, it is ensured that the IAEA safety standards are referred to as the current boundary conditions for the application of nuclear technology.
The Global Status of Decommissioning project was launched in August 2019 and involved collecting and analysing authoritative information on the current status and future evolution of nuclear decommissioning activities around the world. Such information is currently not generally available and therefore this publication addresses this knowledge gap.
The project was coordinated by a steering group comprising experts from a range of IAEA Member States: M. Guy (United Kingdom, Chair), S. Carroll, (Sweden), B. Rehs (Germany), P. Imielski (Germany), J. McCafferty (Canada), T. Kukan (Slovakia), H. Hänggi (Switzerland), T. Rakitskaya (Russian Federation) and R. Quintiliani (Italy). The involvement of and support received from M. Brandauer (OECD Nuclear Energy Agency) and J.-P. Guisset (European Commission) are also gratefully acknowledged.
The IAEA officers responsible for this publication were P.J. O’Sullivan and T. Kilochytska of the Division of Nuclear Fuel Cycle and Waste Technology.
EDITORIAL NOTE
This publication has been edited by the editorial staff of the IAEA to the extent considered necessary for the reader’s assistance. It does not address questions of responsibility, legal or otherwise, for acts or omissions on the part of any person.
Although great care has been taken to maintain the accuracy of information contained in this publication, neither the IAEA nor its Member States assume any responsibility for consequences which may arise from its use.
Guidance provided here, describing good practices, represents expert opinion but does not constitute recommendations made on the basis of a consensus of Member States.
The use of particular designations of countries or territories does not imply any judgement by the publisher, the IAEA, as to the legal status of such countries or territories, of their authorities and institutions or of the delimitation of their boundaries.
The mention of names of specific companies or products (whether or not indicated as registered) does not imply any intention to infringe proprietary rights, nor should it be construed as an endorsement or recommendation on the part of the IAEA.
The IAEA has no responsibility for the persistence or accuracy of URLs for external or third party Internet web sites referred to in this publication and does not guarantee that any content on such web sites is, or will remain, accurate or appropriate.
The authoritative version of this publication is the hard copy issued at the same time and available as pdf on www.iaea.org/publications. To create this version for e-readers, certain changes have been made, including a the movement of some figures and tables.
CONTENTS
SUMMARY
1. INTRODUCTION
1.1. Background
1.2. Objective
1.3. Scope
1.4. Structure
2. THE CONTEXT FOR DECOMMISSIONING AND BASELINE INFORMATION
2.1. Decommissioning of nuclear installations
2.2. Nuclear power reactors
2.3. Research reactors
2.4. Nuclear fuel cycle facilities
2.5. Conclusions
3. INSTITUTIONAL AND LEGAL FRAMEWORKS FOR DECOMMISSIONING
3.1. Policies and institutional arrangements
3.2. Legal and regulatory frameworks
3.3. Responsibilities for decommissioning
3.4. Financing arrangements for decommissioning
3.5. Additional sources of information on institutional and legal frameworks
4. DECOMMISSIONING STRATEGIES AND END STATES
4.1. General approach
4.2. Decommissioning timeline
4.3. Drivers for strategy selection
4.4. Trends and variations
4.5. Conclusions
5. DECOMMISSIONING IMPLEMENTATION
5.1. Responses to questions on decommissioning implementation
5.2. Factors impacting on decommissioning
5.3. Analysis of strengths, weaknesses, opportunities and threats for delivering decommissioning
5.4. Conclusions
6. THE WORKFORCE AND LIABILITIES FOR DECOMMISSIONING
6.1. Introduction
6.2. Workforce for decommissioning
6.3. Decommissioning costs incurred and estimates of future decommissioning liabilities
6.4. Conclusions
7. TECHNICAL CHALLENGES AND TECHNOLOGIES FOR DECOMMISSIONING
7.1. Introduction
7.2. Technological challenges for different types of nuclear facilities under decommissioning
7.3. Regional variations
7.4. Technologies for decommissioning
7.5. Drivers for innovation
7.6. Emerging technologies and tools
7.7. Conclusions
8. CONCLUSIONS
8.1. Introduction
8.2. The current baseline
8.3. Frameworks
8.4. Strategy
8.5. Implementation
8.6. Resources for implementation
8.7. Technical challenges and technologies
Appendix I: IAEA ONLINE DATABASES FOR NUCLEAR FACILITY INFORMATION
Appendix II: FULLY DECOMMISSIONED NUCLEAR POWER REACTORS
Appendix III: EXAMPLES OF NATIONAL FINANCING SCHEMES AND FUNDING MECHANISMS FOR SPENT FUEL, RADIOACTIVE WASTE AND DECOMMISSIONING
Appendix IV: DECOMMISSIONING STRATEGY: NATIONAL AND FACILITY SPECIFIC EXAMPLES
REFERENCES
ABBREVIATIONS
CONTRIBUTORS TO DRAFTING AND REVIEW
STRUCTURE OF THE IAEA NUCLEAR ENERGY SERIES
SUMMARY
This publication presents the outcomes of a project that aimed to analyse the status of nuclear decommissioning activity around the world, as of 2020, and its future evolution. The information presented is based on responses to a questionnaire distributed to organizations with responsibility for planning, implementation and oversight of decommissioning programmes. Baseline information on the numbers and current operational status of nuclear facilities was extracted from the various online nuclear facilities databases maintained by the IAEA. Analysis of the collected data was undertaken at global and regional levels, rather than at the level of individual Member States or sites. Given the unavoidable limitations introduced by such an extensive data collection exercise, this publication is a ‘first of a kind’ and has a pilot nature, with the intention being to develop further editions in due course, taking benefit of the experience gained from the project.
Many of the issues that have led to the shutdown of nuclear facilities over the past decade — political and economic factors, maintenance and/or refurbishment costs and electricity market conditions — may be expected to continue to apply in the future, and indeed it is likely that the rate of shutdowns will accelerate over the next one to two decades due to the age profile of the nuclear power reactors and other facilities currently in operation. This is particularly the case for nuclear power reactors, as a significant proportion of these have been in operation for more than 40 years. Nonetheless, it should also be noted that there is no simple relationship between the age of a facility and the timing of permanent closure, with multiple factors influencing decisions on when a particular facility may be permanently shut down.
Considering all main types of nuclear facility, it is evident that decommissioning activities are likely to continue for the remainder of this century and even beyond. The questionnaire responses suggest that, despite the substantial amount of decommissioning undertaken over the past two to three decades, decommissioning funding and workforce needs will increase significantly in the future.
Subject to the availability of appropriate waste management infrastructure and funding, the responses indicate that immediate dismantling is the preferred decommissioning strategy for all main facility types. Even in the case of graphite moderated reactors, for which deferred dismantling was historically often the selected strategy, the study findings suggest that immediate dismantling approaches are increasingly being selected. National policy, often linked to sustainability considerations, is an important driver for all facility types, together with an increasing tendency among plant owners to seek to discharge liabilities sooner rather than later.
The analysis of factors impacting on project delivery showed regional differences but again generally emphasized the importance of the availability of waste and spent fuel management systems, funding and access to appropriate technology. The latter issue received greatest emphasis in the more advanced programmes, suggesting a perceived need to take greater advantage of technological developments. Licensing and regulatory issues were noted as important considerations for fuel cycle facility decommissioning programmes in particular.
The study respondents indicated a number of technical challenges for which it was anticipated that further technological developments will be required, such as for the dismantling of large components and concrete structures present in graphite moderated reactors, and for improved characterization techniques in poorly accessible locations. Accordingly, despite the technical maturity of current routine decommissioning activities, respondents envisaged that ongoing research and development work will lead to improved levels of safety and of efficiency of implementation.
1. INTRODUCTION
1.1. Background
‘Decommissioning’ is the term generally used in the nuclear industry to delineate the final stage in the lifetime of an authorized nuclear facility, the preceding stages being ‘siting’, ‘design’, ‘construction’, ‘commissioning’ and ‘operation’. It is defined in the following terms in the IAEA Safety Standards Series, Decommissioning of Facilities, No. GSR Part 6 [1]:
The term ‘decommissioning’ refers to the administrative and technical actions taken to allow the removal of some or all of the regulatory controls from a facility (except for the part of a disposal facility in which the radioactive waste is emplaced, for which the term ‘closure’ instead of ‘decommissioning’ is used). Aspects of decommissioning have to be considered throughout the other five major stages.
In accordance with this definition, decommissioning is a planned activity, undertaken in accordance with strict radiological safety criteria appropriate to such activities [2], to ensure the safety of the workforce and the public, as well as of the surrounding environment.
Decommissioning activities have been ongoing for several decades in the nuclear industry and, as of the end of 2020, substantial experience has already been gained in several countries, particularly those with long running nuclear power or nuclear fuel cycle programmes. Given that many such programmes have typically been in existence for more than half a century, an increasing number of nuclear facilities are reaching the end of their useful lives and are being withdrawn from service. It is therefore inevitable that the number of facilities requiring decommissioning will increase substantially in the coming decades.
In 2019 IAEA launched an international collaborative project to collect relevant data and analyse the current global status and future prospects for decommissioning of nuclear facilities (Technical Meeting, 26–30 August 2019, Vienna International Centre), following which the terms of reference for the project were finalized by a steering group comprising representatives from IAEA Member States with significant decommissioning programmes. The terms of reference were issued to Member States in February 2020, together with details of an online questionnaire to collect data on decommissioning plans.
The collected national level information is not being published, but is being used to inform a global and regional level analysis of current practice in decommissioning and future plans, as presented in this publication. The baseline information required for this analysis — for example, regarding the age and current operational status of facilities — was obtained from the IAEA’s online databases for nuclear facility information, such as the Power Reactor Information System (PRIS), the Research Reactor Database (RRDB)¹ and the Integrated Nuclear Fuel Cycle Information System (iNFCIS). A summary description of these databases is provided in Appendix I.
The data collection exercise, based around the online questionnaire, began in February 2020 and continued throughout that year. The questionnaire focused on individual nuclear sites and requested up to date information on current activities and future plans relating to facility decommissioning. The data request was issued to the organizations best placed to provide this information, with this typically being the facility owner, except in limited