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    Periodic Safety Review for Research Reactors
    Periodic Safety Review for Research Reactors
    Periodic Safety Review for Research Reactors
    Ebook208 pages1 hour

    Periodic Safety Review for Research Reactors

    By IAEA

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    About this ebook

    This publication provides information and guidance on the establishment of a process for periodic safety review for research reactors, including preparation, conduct of the review and reporting of results. In addition, it covers the regulatory assessment of these results. The publication also provides information on the experience of Member States in establishing and implementing periodic safety reviews of research reactors, including implementation of reasonable and practical improvements based on these reviews.
    LanguageEnglish
    PublisherInternational Atomic Energy Agency
    Release dateDec 3, 2020
    ISBN9789201054227
    Periodic Safety Review for Research Reactors

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      Book preview

      Periodic Safety Review for Research Reactors - IAEA

      1.png

      Periodic Safety Review

      for Research Reactors

      SAFETY REPORTS SERIES No. 99

      Periodic Safety Review

      for Research Reactors

      INTERNATIONAL ATOMIC ENERGY AGENCY

      VIENNA, 2020

      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:

      Marketing and Sales Unit, Publishing Section

      International Atomic Energy Agency

      Vienna International Centre

      PO Box 100

      1400 Vienna, Austria

      fax: +43 1 26007 22529

      tel.: +43 1 2600 22417

      email: [email protected]

      www.iaea.org/publications

      © IAEA, 2020

      Printed by the IAEA in Austria

      November 2020

      STI/PUB/1889

      IAEA Library Cataloguing in Publication Data

      Names: International Atomic Energy Agency.

      Title: Periodic safety review for research reactors / International Atomic Energy Agency.

      Description: Vienna : International Atomic Energy Agency, 2020. | Series: Periodic safety review for research reactors, ISSN 1020–6450 ; no. 99 | Includes bibliographical references.

      Identifiers: IAEAL 20-01330 | ISBN 978–92–0–106819–4 (paperback : alk. paper) 978–92–0–162619–6 (pdf)

      Subjects: Nuclear power plants — Safety measures. | Industrial safety. | System safety.

      Classification: UDC 621.039.58 | STI/PUB/1889

      FOREWORD

      Routine safety reviews of operating research reactors include reviews of modifications, safety significant events and resulting corrective actions, and the update of safety and operating documents to comply with regulatory requirements and licensing conditions.

      Operators of research reactors may also conduct special safety reviews and assessments, such as the safety reassessment for research reactors taking into consideration the available experience from the Fukushima Daiichi nuclear power plant accident.

      While routine safety reviews and assessments ensure safety within the design basis, there is a need to take into account the cumulative effects of ageing, modifications, operating experience, changes in the standards and technical developments. The review of such aspects can be achieved through a dedicated systemic safety review against the current standards, taking all applicable factors into account at defined intervals. This periodic safety review complements routine safety reviews, but does not replace them.

      IAEA Safety Standards Series No. SSG-25, Periodic Safety Review for Nuclear Power Plants, provides guidance on the periodic safety review of nuclear power plants; however, it does not address the specificities of research reactors and experimental facilities. Given that research reactors do not have a designated lifetime and are expected to operate for reasonably long periods, periodic safety review is an effective way of ensuring that life limiting features are identified in a timely manner to preserve the overall safety of the facility and identify corrective actions and safety improvements.

      Member States are increasingly requiring operating organizations to conduct periodic safety reviews for research reactors. This publication is intended to support operating organizations in their conduct of, and regulatory bodies in their assessment of, periodic safety reviews.

      The IAEA wishes to thank all those who contributed to the development of this publication, including the Australian Nuclear Science and Technology Organisation and Hungarian Atomic Energy Authority for providing annex materials. The IAEA officers responsible for this publication were D. Rao and A.M. Shokr of the Division of Nuclear Installation Safety.

      EDITORIAL NOTE

      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.

      This publication does not address questions of responsibility, legal or otherwise, for acts or omissions on the part of any person.

      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 book and does not guarantee that any content on such web sites is, or will remain, accurate or appropriate.

      The authoritative versions of the publications are the hard copies issued and available as PDFs on www.iaea.org/publications.To create the versions for e-readers, certain changes have been made, including the movement of some figures and tables.

      CONTENTS

      1. INTRODUCTION

      1.1. Background

      1.2. Objective

      1.3. Scope

      1.4. Structure

      2. GENERAL CONSIDERATIONS

      2.1. Objectives of periodic safety review

      2.2. Roles and responsibilities

      2.3. Phases of a periodic safety review project

      2.4. Periodic safety review methodology

      2.5. Periodic safety review process

      2.6. Use of a graded approach

      3. REVIEW PROCESS OF THE OPERATING ORGANIZATION

      3.1. Safety factors relating to the facility

      3.2. Safety factors relating to safety analysis

      3.3. Safety factors relating to operating experience

      3.4. Safety factors relating to organizational effectiveness

      3.5. Safety factors relating to radiological safety

      3.6. Global assessment

      3.7. Integrated implementation plan

      3.8. Documentation

      4. REVIEW PROCESS OF THE REGULATORY BODY

      5. POST-REVIEW ACTIVITIES

      Appendix: DOCUMENTATION OF THE PERIODI C SAFETY REVIEW

      REFERENCES

      Annex I: TYPICAL INPUTS, OUTPUTS AND RELEVANT PUBLICATIONS FOR THE REVIEW OF SAFETY FACTORS

      Annex II: PERIODIC SAFETY REVIEW FOR THE OPAL REACTOR: OVERVIEW AND LESSONS LEARNED

      Annex III: REGULATORY ASSESSMENT OF THE BUDAPEST RESEARCH REACTOR PERIODI C SAFETY REVIEW

      ABBREVIATIONS

      CONTRIBUTORS TO DRAFTING AND REVIEW

      1. INTRODUCTION

      1.1. Background

      Requirement 5 of IAEA Safety Standards Series No. SSR-3, Safety of Research Reactors [1], states:

      "The safety assessment shall be continued throughout all the stages of the reactor’s lifetime (in periodic safety reviews) and shall be conducted in accordance with the potential magnitude and nature of the hazards associated with the particular facility or activity."

      Paragraph 4.24 of Ref. [1] states that The safety assessments (and periodic safety reviews) shall be documented to facilitate their evaluation.

      Paragraph 4.25 of Ref. [1] states:

      Systematic periodic safety reviews of the research reactor in accordance with the regulatory requirements shall be performed throughout its operating lifetime, with account taken of operating experience, the cumulative effects of ageing, applicable safety standards and safety information from all relevant sources. The operating organization shall verify by analysis, surveillance, testing and inspection that the physical state of the reactor facility, including experimental devices and facilities, is as described in the safety analysis report and other safety documents, and that the facility is commissioned and operated in accordance with safety requirements and the safety analysis and operational limits and conditions.

      Paragraph 4.26 of Ref. [1] (footnote omitted) states:

      Activities for systematic periodic safety reassessments include, among others, periodic safety reviews such as self-assessments and peer reviews to confirm that the safety analysis report and other selected documents (such as documentation for operational limits and conditions, maintenance, training and qualification) for the facility remain valid in view of current regulatory requirements, or, if necessary, to update or make improvements to the extent practicable. In such reviews, changes in the site characteristics, changes in the utilization programme, cumulative effects of ageing and modifications, changes to procedures, the use of feedback from operating experience and technical developments shall be considered. It shall be verified that selected structures, systems and components and software comply with the design requirements.

      Paragraph 7.121 of Ref. [1] states that On the basis of the results of the periodic safety review, the operating organization shall take any necessary corrective actions and shall consider making justified modifications to enhance safety.

      Paragraph 7.122 of Ref. [1] states that The operating organization shall report to the regulatory body as required, in a timely manner, the confirmed findings of the periodic safety review that have implications for safety.

      The IAEA’s Code of Conduct on the Safety of Research Reactors [2] states:

      The regulations and guidance established by the State or the regulatory body according to national arrangements should…. Require the operating organization to undertake periodic safety reviews at intervals determined by the regulatory body and to make proposals for upgrading and refurbishment arising from such reviews as necessary.

      Paragraph 22(a) of Ref. [2] states:

      "The operating organization should…carry out safety reviews at appropriate intervals throughout its life, including in relation to modifications, changes in utilization and significant experimental activities and the management of ageing. The safety assessments and periodic safety reviews should include all technical, operational, personnel and administrative aspects of safety related operations. The assessments and reviews should be well documented, subsequently updated in light of operating experience and

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