IEC 60987:2007
核电站.对安全性很重要的仪器仪表和控制.基于计算机系统的硬件设计要求

Nuclear power plants - Instrumentation and control important to safety - Hardware design requirements for computer-based systems

被代替

标准号

IEC 60987:2007

发布

2007年

中文版

GB/T 41142-2021 (修改采用的中文版本)

发布单位

国际电工委员会

替代标准

IEC 60987:2013

当前最新

IEC 60987:2021

 

 

引用标准

IAEA 50-C/SG-Q-1996 IAEA NS-G 1.3 IEC 60780 IEC 60812 IEC 60880 IEC 61000 IEC 61025 IEC 61513:2001 IEC 62138 ISO 9001

被代替标准

IEC 45A/662/FDIS:2007 IEC 60987:1989

适用范围

1.1 General This International Standard is applicable to NPP computer-system hardware for systems of Class 1 and 2 (as defined by IEC 61513). The structure of this standard has not changed significantly from the original 1989 issue; however, some issues are now covered by standards which have been issued in the interim (for example, IEC 61513 for system architecture design) and references to new standards have been provided where applicable. The text of the standard has also been modified to reflect developments in computer system hardware design, the use of pre-developed (for example, COTS) hardware and changes in terminology. Computer hardware facilities used for software loading and checking are not considered to form an intrinsic part of a system important to safety and, as such, are outside the scope of this standard. NOTE 1 Class 3 computer-system hardware is not addressed by this standard, and it is recommended that such systems should be developed to commercial grade standards. NOTE 2 In 2006 the development of a new standard to address hardware requirements for “very complex” hardware was discussed within IEC SC 45A. If such a standard is developed then that standard would be used for the development of “very complex” hardware in preference to IEC 60987. 1.2 Use of this standard for pre-developed (for example, COTS) hardware assessment Although the primary aim of this standard is to address aspects of new hardware development, the processes defined within this standard may also be used to guide the assessment and use of pre-developed hardware, such as COTS hardware. Guidance has been provided in the text concerning the interpretation of the requirements of this standard when used for the assessment of such components. In particular, the quality assurance requirements of 4.3, concerning configuration control, apply. Pre-developed components may contain firmware (as defined in 3.8), and, where firmware software is deeply imbedded, and effectively “transparent” to the user, then IEC 60987 should be used to guide the assessment process for such components. An example of where this approach is considered appropriate is in the assessment of modern processors which contain a microcode. Such a code is generally an integral part of the “hardware”, and it is therefore appropriate for the processor (including the microcode) to be assessed as an integrated hardware component using this standard. Software which is not firmware, as described above, should be developed or assessed according to the requirements of the relevant software standard (for example, IEC 60880 for Class 1 systems and IEC 62138 for Class 2 systems). 1.3 Applicability of this standard to programmable logic devices development I&C components may include programmable logic devices that are given their specific application logic design by the designer of the I&C component, as opposed to the chip manufacturer. Examples of such devices include complex programmable logic devices (CPLD) and field programmable gate arrays (FPGA). While the programmable nature of these devices gives the development processes used for these devices, some of the characteristics of a software development process and the design processes used for such devices, are very similar to those used to design logic circuits implemented with discrete gates and integrated circuit packages. Therefore, the design processes and design verification applied to programmable logic devices should comply with the relevant requirements of this standard (i.e. taking into account the particular features of the design processes of such devices). To the extent that software-based tools are used to support the design processes for programmable logic devices, those software tools should generally follow the guidance provided for software-based development tools in the appropriate software standard, i.e. IEC 60880 (Class 1 systems) or IEC 62138 (Class 2 systems).

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