BS EN 62138-2009 核电站.安全性的使用仪器和控制重要事项.基于计算机系统执行B或C类功能的软件状况

标准号：BS EN 62138-2009
中文标准名称：核电站.安全性的使用仪器和控制重要事项.基于计算机系统执行B或C类功能的软件状况
英文标准名称：Nuclear power plants - Instrumentation and control important for safety - Software aspects for computer-based systems performing category B or C functions
标准类型：F69
发布日期：2004/11/5 12:00:00
实施日期：2004/11/5 12:00:00
中国标准分类号：F69
国际标准分类号：27.120.20;35.080
引用标准：IEC 61513-2001;IEC 61226
适用范围：This International Standard provides requirements for the software of computer-based I&C systems performing functions of safety category B or C as defined by IEC 61226. It complements IEC 60880 and IEC 60880-2, which provide requirements for the software of computer-based I&C systems performing functions of safety category A.It is also consistent with, and complementary to, IEC 61513. Activities that are mainly systemlevel activities (for example, integration, validation and installation) are not addressedexhaustively by this standard: requirements that are not specific to software are deferred to IEC 61513.IEC 61513 defines the safety classes of I&C systems important to safety as follows:• I&C systems of safety class 1 are basically intended to perform functions of safetycategory A, but may also perform functions of safety category B and/or C, and non safetyclassifiedfunctions;• I&C systems of safety class 2 are basically intended to perform functions of safety category B, but may also perform functions of safety category C, and non safety-classified functions;• I&C systems of safety class 3 are basically intended to perform functions of safety category C, but may also perform non safety-classified functions.Since a given safety-classified I&C system may perform functions of different safety categories and even non safety-classified functions, the requirements of this standard are attached to the safety class of the I&C system.This standard takes into account the current practices for the development of software for I&Csystems, in particular:• the use of pre-developed software, equipment and equipment families that were not necessarily designed to nuclear industry sector standards;• the use of dedicated “black-box” devices with embedded software;• the use of application-oriented languages.This standard is not intended to be used as a general-purpose software engineering guide. Itprovides requirements that the software of I&C systems of safety classes 2 or 3 must meet toachieve system nuclear safety objectives.