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I&C systems important to safety may be implemented using hardwired equipment, programmable digital equip­ment such as processor-based or HDL-programmed devices, or by using a combination of several types of technologies. This International Standard provides requirements and recommendations for the overall I&C which may contain one or several of these technologies.

This document highlights also the need for complete and precise requirements, derived from the plant safety goals, as a pre-requisite for generating the comprehensive requirements for the overall I&C, and hence for the individual I&C systems important to safety.

This document introduces the concept of a safety lifecycle for the overall I&C including the I&C architecture, and a safety lifecycle for the individual systems. By this, it highlights the relations between the safety objectives of the NPP and the requirements for the architecture of the I&C systems important to safety, and the relations between the I&C architecture and the requirements of the individual systems important to safety.

Standards such as ISO/IEC/IEEE 15288 provide an overarching concept of system life cycle provisions covering product-related processes as well business development. The scope of IEC 61513 refers to safety aspects and their demonstration, and significantly deepens the considerations of ISO/IEC/IEEE 15288 in this field.

The lifecycles illustrated in, and followed by this document are not the only ones possible; other lifecycles may be followed, provided that the requirements stated in this document are satisfied.

NOTE The standard addresses the safety lifecycle of the overall I&C and of the individual systems. Although systems not important to safety are not in the scope of the standard, they have to be considered in the overall I&C safety lifecycle, as they may constitute constraints for the safety system design and qualification (e.g. installation in common rooms, interfaces, sizing of support systems, coordination of installation and commissioning works).

Furthermore, the standard does not describe the handling of interfaces between organisations (owner, architect engineering organisation, engineering organisations, commissioning organisations). In practice, responsibilities for plans, activities and documents will be allocated according to the contractual arrangements.

Application: new and pre-existing plants

This document applies to the I&C of new nuclear power plants as well as to I&C upgrading or back-fitting of existing plants.

For existing plants, only a subset of requirements is applicable depending on the scope of the project, and this subset has to be identified at the beginning of any project.

Framework

The document comprises four normative clauses (an overview is provided in Figure 1):

Clause 5 addresses the overall I&C safety lifecycle:

–   defining requirements for the I&C functions, and associated systems and equipment derived from the safety analysis of the NPP, the defence-in-depth and diversity concept of the NPP, the categorisation of I&C functions, and the plant lay-out and operational context;

–   structuring the I&C architecture, dividing it into a number of systems and assigning the I&C functions to systems. Design criteria are identified, including those to give defence in depth and to minimize the potential for common cause failure (CCF);

–   planning the I&C architecture.

Clause 6 addresses the requirements for the individual I&C systems important to safety, particularly the requirements for systems built from programmable digital equipment. A differentiation of requirements is made according to the safety category of the I&C functions (A, B or C) or according to the safety class of the systems (1, 2 or 3) is made when relevant;

Clauses 7 and 8 address the overall integration, commissioning, operation and maintenance of the I&C systems.

Figure 1 outlines the structure of the standard. It does not necessarily present the timely order of activities which may be in reality partially executed in parallel, or include iterations.

Additionally, the standard provides informative annexes:

Annex A highlights the relations between IAEA and basic safety concepts that are used throughout this document;

Annex B provides guidance to support comparison of this document with parts 1, 2 and 4 of IEC 61508. This annex surveys the main requirements of IEC 61508 to verify that the issues relevant to safety are adequately addressed, considers the use of common terms and explains the reason for adopting different or complementary techniques or terms;

Annex C provides a proposal for the documentation structure for overall I&C planning and I&C system design;

Annex D indicates the main changes to be considered during the next update cycles of several SC45A standards to align them to this revision of IEC 61513.

 

 

5 Overall I&C safety lifecycle: Requirements specification for the overall I&C

 

5.2    Deriving the I&C requirements from the plant safety design base

 

Output documentation

 

 

5.2.2 Functional, performance and      independence requirements

5.2.3 Categorisation

5.2.4 Plant constraints

 

 

 

 

5.2.5 Overall requirements specification for the I&C functions important to safety

 

 

 

 

 

 

 

5 Overall safety lifecycle: Derivation of requirements for the overall I&C and design of the I&C architecture

 

5.3     Design of the I&C architecture

 

5.4     Overall I&C (O) planning

 

5.5    Output documentation

 

 

5.3.2  Definition of the systems

5.3.3  Human machine interfaces and HFE

5.3.4  Data communication

5.3.5  Engineering tools

5.3.6  Defence against CCF

5.3.7  Assignment of the functions to systems

5.3.8  Required analysis

 

5.4.2  O QA programs

5.4.3  O cybersecurity planning

5.4.4  O configuration management plan

5.4.5  O requirements management plan

5.4.6  O integration and commissioning plan

5.4.7  O operation plan

5.4.8  O maintenance plan

5.4.9  Planning of training

 

5.5.2  Architectural design

5.5.3  Functional assignment

5.5.4  Overarching design concepts

 

 

 

 

 

 

 

 

 

 

6 System safety lifecycle: Realisation and planning of the individual I&C systems

 

6.1   System lifecycle phases

 

6.9   System (S) planning

 

6.10  Output documentation

 

 

6.2  S requirements specification

6.3  S specification

6.4  S detailed design & implementation

6.5  S integration

6.6  S validation testing

6.7  S installation and commissioning

6.8  S modifications

 

6.9.2   S quality plan

6.9.3   S verification plan

6.9.4   S configuration management plan

6.9.5   Fault resolution procedures

6.9.6   S integration plan

6.9.7   S validation plan

6.9.8   S installation and commissioning plan

6.9.9   S operation plan

6.9.10 S maintenance plan

 

6.10.2  S requirements
  specification

6.10.3  S specification

6.10.4  S detailed design

6.10.5  S integration

6.10.6  S validation testing

6.10.7  S modification

 

 

 

 

6.11   System qualification

 

 

 

 

6.11.2 Generic / application-
          specific qualification

 

6.11.3 S qualification plan

6.11.6 Maintaining
          qualification

 

6.11.7 Qualification
          documentations

 

 

 

 

 

 

 

 

 

 

 

 

7 Overall integration and commissioning

 

7.2 Requirements on the objectives

 

7.3 Requirements on output documentation

 

 

 

 

 

 

 

8 Overall operation and maintenance

 

 

 

 

 

 

8.2 Requirements on the objectives

 

8.3 Requirements on output documentation

 

 

 

 

 

 

 

Key QA: Quality Assurance; O: Overall I&C; S: System

 

Figure 1 – Overall framework of this document

 

This document gives the definitions of different types of impedance in time domain and specifies the test method of these kinds of impedance. It’s applicable for determining the values of time domain impedance of twinax cables and twinax cable assemblies.

This part of IEC 60679 describes the general properties, performance characteristics and usage precautions for quartz crystal oscillators. This content mainly describes crystal oscillators, but some descriptions also apply to oscillators other than crystal units (e.g. MEMS resonators).

Replacement:

This part of the IEC 61851 series, together with [IEC 61851-1 Ed. 3] and [IEC 61851-23, Ed. 2.0], applies to the EV supply equipment to provide energy transfer between the supply network and electric vehicles (EVs), with a rated maximum voltage at side A (supply network side) up to 1 000 V AC or up to 1 500 V DC and a rated maximum voltage at side B (EV side) up to 1 250 V DC.

NOTE 1 A rated maximum voltage of the EV supply equipment at side B of 1 500 V DC is under consideration.

This document specifies the EV supply equipment of Megawatt Charging System (MCS) equipped with a coupler according to IEC TS 63379. Systems different to system MCS using a coupler specified in IEC TS 63379 are under consideration.

Requirements for bidirectional power flow systems are under consideration.

This document does not cover all safety aspects related to maintenance.

Requirements for systems not providing protective separation between side A (supply network side) and side B (EV side) are under consideration.

The requirements for digital communication between the EV supply equipment and the EV for control of energy transfer are defined in ISO 15118-10[1] and ISO 15118-20.

The specific requirements for EV supply equipment with multiple side Bs (EV sides) are provided in Annex FF.

General information of communication and the energy transfer process is described in Annex GG.

General information on the touch current and touch impulse current is provided in Annex HH.

EV supply equipment in compliance with this document is not intended to provide energy transfer to a single EV using:

multiple vehicle connectors of the same EV supply equipment; or

multiple EV supply equipments.

Requirements for such use case are not specified in this document, but are under consideration.

NOTE 2  The safety requirements of vehicle during charging are specified in ISO 5474 series.

NOTE 3  Requirements for an optional automated connection of system MCS are under preparation in IEC 61851-27.

Requirements for EVs mated to an EV supply equipment according to this document are specified in ISO 5474-3:2023, Annex B.

amendment

This document specifies the minimum operational and performance requirements, methods of testing and required test results conforming to performance standards adopted by the IMO in resolution MSC.74(69) Annex 2 Recommendation on Performance Standards for Track Control Systems. In addition, it takes into account IMO resolution A.694(17) to which IEC 60945 is associated. It also takes into account IMO resolution MSC.302(87) on bridge alert management (BAM), to which IEC 62923-1 and IEC 62923-2 are associated.

All text of this document that is identical to that in IMO resolution MSC.74(69), Annex 2, is printed in italics and the resolution (abbreviated to – A2) and paragraph numbers are indicated in brackets i.e. (A2/3.3).

This part of IEC 60794 describes test procedures to be used in establishing uniform requirements for optical fibre cables for the mechanical property - abrasion.

This document applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors.

Method E2A evaluates the ability of the sheath to resist abrasion; Method E2B evaluates the ability of cable markings (include text or graphic markers, and continuous colored lines on cable) to resist abrasion.

This part of IEC 61753 contains the minimum initial performance, test and measurement requirements and severities which plug-pigtail style and plug-receptacle style OTDR reflecting devices need to satisfy in order to be categorized as meeting the requirements of category C-Controlled environments, as defined in Annex A of IEC 61753-1 [1][1]. These devices are utilized for out-of-band OTDR testing of an optical fibre system.

Annex B provides information concerning these devices.

This part of IEC 63478-2 describes the requirements to measure user’s Quality of Experience (QoE) on multimedia conferencing services.

This International standard specifies three techniques for the determination of free Bisphenol A (BPA) in plastics of electrotechnical products.

The liquid chromatography – diode array detector (LC-DAD) and liquid chromatography mass spectrometry (LC-MS) and liquid chromatography tandem mass spectrometry (LC-MS/MS).  These test methods are described in the normative part of this standard. These test methods have been evaluated for use with PC, PC/ABS, PP matrices containing free BPA between 20 mg/kg to 500 mg/kg as shown in the Pre-IIS 13 results in Annex C and IIS 13 results in Annex D. The use of these methods for BPA concentration ranges of plastics, other than those specified in Annex C, Annex D has not been evaluated.