IEC 62705:2022

Nuclear facilities - Instrumentation and control important to safety - Radiation monitoring systems (RMS): Characteristics and lifecycle

IEC 62705:2022 is available as IEC 62705:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62705:2022 gives requirements for the lifecycle management of radiation monitoring systems (RMS) and gives guidance on the application of existing IEC standards covering the design and qualification of systems and equipment. The purpose of this document is to lay down requirements for the lifecycle management of RMSs and give application guidance. This document is intended to be consistent with the latest versions of International Standards dealing with radiation monitors, sampling of radioactive materials, instruments calibration, hardware and software design, classification, and qualification. This document is applicable to RMSs installed in nuclear facilities intended for use during normal operation, anticipated operational occurrences (AOO), design basis accidents (DBA) and design extension conditions (DEC), including severe accidents (SA). This second edition cancels and replaces the first edition published in 2014. This edition includes the following significant technical changes with respect to the previous edition:
- modification of the title.
- to be consistent with the categorization of the accident condition.
- to update the references to new standards published since the first edition.
- to update the terms and definitions.

Installations nucléaires - Instrumentation et contrôle-commande importants pour la sûreté - Systèmes de surveillance des rayonnements (RMS): Caractéristiques et cycle de vie

IEC 62705:2022 est disponible sous forme de IEC 62705:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 62705:2022 établit les exigences en matière de gestion du cycle de vie des systèmes de surveillance des rayonnements (RMS) et fournit des recommandations relatives à l'application des normes IEC existantes qui couvrent la conception et la qualification des systèmes et des matériels. Le présent document a pour objet d'établir les exigences en matière de gestion du cycle de vie des RMS et de fournir des recommandations d'application. Le présent document est destiné à être cohérent avec les dernières versions des Normes internationales relatives aux moniteurs de surveillance des rayonnements, à l'échantillonnage des matériaux radioactifs, à l'étalonnage des instruments, à la conception des matériels et logiciels, au classement et à la qualification des systèmes. Le présent document s'applique aux RMS installés dans les installations nucléaires et destinés à être utilisés pendant le fonctionnement normal, en cas d'incident de fonctionnement prévu (IFP), lors d'accidents de dimensionnement (DBA) et en conditions additionnelles de dimensionnement (DEC), incluant les accidents graves (SA). Cette deuxième édition annule et remplace la première édition parue en 2014. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- le titre a été modifié;
- la catégorisation des conditions accidentelles a été harmonisée;
- les références aux nouvelles normes publiées depuis la première édition ont été mises à jour;
- les termes et définitions ont été mis à jour.

General Information

• Status: Published
• Publication Date: 21-Nov-2022
• ICS: 27.120.20 - Nuclear power plants. Safety
• Technical Committee: SC 45A - Instrumentation, control and electrical power systems of nuclear facilities
• Drafting Committee: WG 5 - TC 45/SC 45A/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 25-Nov-2022
• Completion Date: 22-Nov-2022

Relations

• Revises: IEC 62705:2014 - Nuclear power plants - Instrumentation and control important to safety - Radiation monitoring systems (RMS): Characteristics and lifecycle
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62705
®
Edition 2.0 2022-11
REDLINE VERSION
INTERNATIONAL
STANDARD

colour
inside

Nuclear power plants facilities –
Instrumentation and control important to safety – Radiation monitoring
systems (RMS): Characteristics and lifecycle

IEC 62705:2022-11 RLV(en)

---------------------- Page: 1 ----------------------
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IEC 62705
®
Edition 2.0 2022-11
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Nuclear power plants facilities –
Instrumentation and control important to safety – Radiation monitoring
systems (RMS): Characteristics and lifecycle
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.120.20 ISBN 978-2-8322-6126-2
  Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission

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– 2 – IEC 62705:2022 RLV © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 2
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 13
4 Symbols and abbreviated terms . 17
5 RMS categorization and classification . 18
5.1 Function categorization for RMS . 18
5.2 System classification for RMS . 18
5.3 Criteria for identifying the plant-specific variables . 18
6 RMS detailed design and implementation . 19
6.1 General . 19
6.2 Radioactive noble gas off-line monitoring . 19
6.3 Radioactive a
...