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BS EN IEC 62465:2019

BS EN IEC 62465:2019

$167.15

Nuclear power plants. Instrumentation and control important to safety. Management of ageing of electrical cabling systems

Published By Publication Date Number of Pages
BSI 2019 38
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This International Standard provides strategies, technical requirements, and recommended practices for the management of normal ageing of cabling systems that are important to safety in nuclear power plants. The main requirements are presented in the body of this International Standard followed by a number of informative annexes with examples of cable testing techniques, procedures, and equipment that are available for the nuclear industry to use to ensure that ageing degradation will not impact plant safety.

This International Standard covers cables and their accessories (e.g., connectors) installed in nuclear power plants (inside and outside the containment). It provides requirements to perform cable testing for the purposes of predictive maintenance, troubleshooting, ageing management, and assurance of plant safety. It is concerned with Instrumentation and Control (I&C) cables, signal cables, and power cables of voltages less than 1 kV. More specifically, this International Standard focuses on in-situ testing techniques that have been established for determining problems in cable conductors (i.e., copper wire) and, to a lesser extent, on insulation material (i.e., polymer). It follows the IEC 62342 standard on “Management of Ageing” that was prepared to provide general guidelines for management of ageing of I&C components in nuclear power plants, including cables. It should be pointed out that cable testing technologies are evolving and new methods are becoming available that are not covered in this International Standard. More specifically, this International Standard covers typical cable testing methods that have been in use in the nuclear power industry over the last decade. It should also be pointed out that a single cable testing technique is unlikely to provide conclusive results, and a reliable diagnosis normally requires a combination of techniques.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
13 1 Scope
2 Normative references
3 Terms and definitions
16 4 Technical background
4.1 General
4.2 Cable types
17 4.3 Reasons for cable ageing management
4.4 Cable stressors
18 4.5 Cable testing techniques
5 Cable testing requirements
5.1 General
Table 1 – Examples of stressors with potential to damage cables
19 5.2 Test methods
5.3 Application of cable testing requirements
5.4 Test interval
5.5 Test location
5.6 Calibration of cable testing equipment
5.7 Test results
5.8 Validation of test methods
20 5.9 Software and test tool validation
5.10 Qualification of test personnel
6 Acceptable means for cable testing
7 Testing of end devices
21 8 Relationship between initial qualification and cable ageing management
9 Example of a nuclear power plant practice for cable ageing management
10 Cable testing for long-term operation
22 Annex A (informative) Typical components of an electrical cable
23 Figure A.1 – Example of Cables Covered by this International Standard
25 Annex B (informative) Cable testing techniques
27 Annex C (informative) Description of TDR test
Figure C.1 – Principle of TDR test of an open cable
28 Figure C.2 – Principle of TDR test of a short cable
Figure C.3 – Simplified TDR traces for a cable with a passive load
29 Figure C.4 – TDR test setup
30 Figure C.5 – RTD cabling and corresponding TDR signature
31 Annex D (informative) Electrical measurement of NIS cables and detectors
32 Figure D.1 – I-V curve
33 Annex E (informative) Example of a nuclear power plant practice for cable ageing management
34 Figure E.1 – Photo of baskets in which samples of 1E cables are deposited and placed in the plant for periodic removal and testing
35 Figure E.2 – Schematic of test interval for mechanical tests
36 Bibliography

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BS EN IEC 62465:2019
$167.15