IEC 62705:2014

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

IEC 62705:2014 applies to radiation monitoring system (RMS) installed in the nuclear power plants (NPPs). This standard gives requirements for the lifecycle management of RMSs and gives guidance on the application of existing IEC standards covering the design and qualification of systems and equipment. This standard may be applicable to other nuclear facilities (e.g. nuclear fuel storage and processing sites) by evaluating the differences from NPPs.

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

L'IEC 62705:2014 s'applique au système de surveillance des rayonnements (SSR) installés dans les centrales nucléaires de puissance. La présente norme établit les exigences de gestion du cycle de vie des systèmes de surveillance des rayonnements et fournit les lignes directrices quant à l'application des normes IEC existantes couvrant la conception et la qualification des systèmes et des matériels. La présente Norme peut être applicable à d'autres installations nucléaires (par exemple aux sites de stockage et de traitement du combustible nucléaire) en évaluant les différences qui existent par rapport aux centrales nucléaires de puissance.

General Information

• Status: Published
• Publication Date: 23-Jul-2014
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• 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: DELPUB - Deleted Publication
• Start Date: 01-Jun-2020
• Completion Date: 22-Nov-2022

Relations

• Revised: IEC 62705:2022 - Nuclear facilities - Instrumentation and control important to safety - Radiation monitoring systems (RMS): Characteristics and lifecycle
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62705 ®
Edition 1.0 2014-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Nuclear power plants – Instrumentation and control important to safety –
Radiation monitoring systems (RMS): Characteristics and lifecycle

Centrales nucléaires de puissance – Instrumentation et contrôle-commande
importants pour la sûreté – Systèmes de surveillance des rayonnements (SSR):
Caractéristiques et cycle de vie

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IEC 62705 ®
Edition 1.0 2014-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Nuclear power plants – Instrumentation and control important to safety –

Radiation monitoring systems (RMS): Characteristics and lifecycle

Centrales nucléaires de puissance – Instrumentation et contrôle-commande

importants pour la sûreté – Systèmes de surveillance des rayonnements (SSR):

Caractéristiques et cycle de vie

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 27.120.20 ISBN 978-2-8322-1773-3

– 2 – IEC 62705:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 11
4 Abbreviations . 13
5 RMS categorization and classification . 13
5.1 Function categorization for RMS . 13
5.2 System classification for RMS . 13
6 RMS detailed design and implementation . 14
6.1 General . 14
6.2 Radioactive noble gas off-line monitoring . 14
6.3 Radioactive aerosol off-line monitoring . 15
6.4 Radioactive iodine off-line monitoring . 15
6.5 Liquid off-line monitoring . 15
6.6 Tritium off-line monitoring . 15
6.7 On-line or in-line monitoring . 16
6.8 Area monitoring . 16
6.9 Centralized system . 16
6.10 Leak detection . 16
7 RMS integration and validation . 16
7.1 RMS integration . 16
7.2 RMS validation . 16
8 RMS installation . 16
9 RMS design modification . 17
10 RMS qualification . 17
10.1 General . 17
10.2 Environmental qualification . 17
10.3 Seismic qualification . 17
10.4 Electromagnetic interference. 18
11 Calibration . 18
11.1 General . 18
11.2 Periodical calibration and functional check . 18
11.2.1 General . 18
11.2.2 Calibration check after installation . 18
11.2.3 Functional check. 18
11.2.4 Countermeasures to loss of monitoring during calibration or functional
check . 18
11.3 Radiation calibration . 18
11.4 Calibration for other quantity . 18
11.5 Traceability . 19
Annex A (informative) Example of safety classification for RMS important to safety . 20
Annex B (informative) Relation between IEC 61513 system lifecycle and IEC 62705
requirements . 21

Table 1 – Overview of the standards covering the domain of radiation monitoring in
NPPs . 7
Table A.1 – Example of safety classification for RMS important to safety . 20
Table B.1 – Relation between IEC 61513 system lifecycle and IEC 62705
requirements . 21

– 4 – IEC 62705:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NUCLEAR POWER PLANTS – INSTRUMENTATION
AND CONTROL IMPORTANT TO SAFETY –
RADIATION MONITORING SYSTEMS (RMS):
CHARACTERISTICS AND LIFECYCLE
FOREWORD
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