DIN EN IEC 60987:2022-08: Nuclear power plants - Instrumentation and control important to safety - Hardware requirements (IEC 60987:2021); German version EN IEC 60987:2021

This standard contains requirements and recommendations for hardware aspects of control systems in nuclear power plants, regardless of their technology, and applies in a graded manner to all safety classes (as specified in DIN EN 61513 (VDE 0491-2):2013-09, Nuclear power plants - Control systems for systems with safety significance - General system requirements (IEC 61513:2011); German version EN 61513:2013). It is consistent with IEC 61513 and complements it. For activities that are mainly at system level (for example integration, validation and installation) and are not hardware specific, reference is made to IEC 61513. The requirements described in this standard serve in particular to guide the selection of already available components, the hardware aspects of detailed system design and implementation, and the manufacturing of the units. Already available units may contain microcontrollers or HPDs and, if firmware or programs are embedded, may be effectively transparent to the user. In such cases, this standard can be used as guidance for the evaluation process of such components. An example where this approach is considered appropriate is in the assessment of modern processors containing microcode. Such code is generally an integral part of the "hardware" and it is therefore appropriate to assess the processor (including microcode) as an integrated hardware component using this standard. This document does not explicitly address the protection of systems against threats arising from malicious attacks, that is, the IT security of programmable digital entities. For requirements on IT security programs for programmable digital units for all phases of development and field operation, see DIN EN IEC 62645 (VDE 0491-3-7):2021-03, Nuclear power plants - Instrumentation and control and electrical systems - IT security requirements (IEC 62645:2019); German version EN IEC 62645:2020. This document supersedes DIN EN 60987:2015-06; VDE 0491-3-1:2015-06. Compared to DIN EN 60987 (VDE 0491-3-1):2015-06, the following changes have been made: (a) the title of the standard has been changed; (b) it has been considered that hardware requirements are to be applied to any type of control technology, including conventional hard-wired equipment, programmable digital equipment or combinations of both; (c) the standard has been aligned with recent IAEA documents, in particular SSR-2/1, and definitions of the IAEA have been adopted where possible; d) requirements have been replaced that are related to standards published after the superseded edition of the standard, in particular IEC 61513, IEC 60880, IEC 62138, IEC 62566 and IEC 62566-2; e) review of existing requirements and updating of terminology; f) extension of the scope of the standard to all hardware (computerized or non-computerized) and to all safety classes 1, 2 and 3; g) completion and updating of IEC and IAEA references and vocabulary; h) consideration of possible implications of other IAEA requirements and recommendations in view of the extension of the IEC/SC 45A scope of work; i) the use of IEC 62566 and IEC 62566-2 for HPD development was highlighted; j) presentation of specific activities for already available products (selection, acceptance and/or mitigation); k) clarified requirements for design, manufacturing and control of electronic modules; l) added reliability assessment methods; m) included requirements regarding the use of automated testing or monitoring activities; n) added description of monitoring activities for manufacturing (monitoring process, evaluation of manufactured devices, preservation of products); o) defined and ensured the inclusion of a tiered approach for dealing with the three classes of devices and their associated requirements.