IEC 61226-2020 Nuclear power plants – Instrumentation, control and electrical power systems important to safety – Categorization of functions and classification of systems

IEC 61226-2020 Nuclear power plants – Instrumentation, control and electrical power systems important to safety – Categorization of functions and classification of systems. This 2-phase process is defined for purpose of comprehensiveness; it enables the capture of all the functions and all the systems important to safety, including I&C systems, as well as electrical power systems. In this scheme, functions are defined and categorized regardless of the physical means that are implemented to fulfill them. In the framework of this document, the functions to be categorized are performed by I&C systems. Accordingly, they are called I&C functions. This document applies to I&C and electrical power systems for new nuclear power plants as well as for modification and modernization of existing plants. For existing plants, only a subset of requirements can be applicable, and this subset is identified at the beginning of any project. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60709，Nuclear power plants – Instrumentation, control and electrical power systems important to safety – Separation IEC/IEEE 60780-323， Nuclear facilities 一Electrical equipment important to safety – Qualification. IEC 60812, Failure modes and effects analysis (FMEA and FMECA) IEC 60880, Nuclear power plants – Instrumentation and control systems important to safety – Software aspects for computer-based systems performing category A functions. IEC 60964, Nuclear power plants – Control rooms – Design. IEC 60965, Nuclear power plants – Control rooms – Supplementary control room for reactor shutdown without access to the main control room. IEC 60980，Recommended practices for seismic qualification of electrical equipment of the safety system for nuclear generating stations IEC 61000-4 (all parts)， Electromagnetic Compatibility (EMC) 一Part 4: Testing and measurement techniques IEC 61500, Nuclear power plants – Instrumentation and control systems important to safety – Data communication in systems performing category A functions. IEC 61513:2011, Nuclear power plants – Instrumentation and control important to safety – General requirements for systems. IEC 61771, Nuclear power plants – Main control-room – Verification and validation of design IEC 61772, Nuclear power plants – Control rooms – Application of visual display units (VDUs) IEC 61839，Nuclear power plants – Design of control rooms – Functional analysis and assignment IEC 62003，Nuclear power...