标准摘要
[中文适用范围]： 本文件提供了安全系统中用于执行 A 类安全功能（根据 IEC 61226）的安全逻辑组件的设计、构造和测试的要求和建议。安全逻辑组件包括诸如将基于计算机的系统连接至开关设备执行器或接触器以提供跳闸或工程安全功能驱动的硬连线逻辑组件等逻辑。安全逻辑组件是安全系统的重要部分，并且可能包括冗余通道之间的投票逻辑。本文件提供了用于安全执行器控制的安全逻辑组件的一般描述。提出了满足可靠性目标的原则。描述和解释了与设计要求相关的主要特征。给出了各种测试及其要求，以验证设计（包括资格测试）、制造和现场的正确安装。附录 A（资料性）给出了安全逻辑组件的可能应用列表。附录 B（规范性）提出了一系列可能的硬连线技术及其各自的安全逻辑组件设计要求。附件C（资料性附录）对可靠性及其属性进行了解释，以提高可靠性并降低危及核电厂安全和可用性的最终风险。本文档的范围不涉及保护系统的设计，仅涵盖设计安全逻辑组件所需的技术和架构解决方案。 IEC 61513 涵盖了使用安全逻辑组件的安全系统设计。安全逻辑组件中实现的详细和特定功能很大程度上取决于每个反应器的设计，本文档中未提及。由于本文档重点关注系统的 IC 部分@，因此使用电源断路器进行的最终投票逻辑不包括在本文档的范围内。 [外文原描述]： IEC 60744:2018 provides requirements and recommendations for the design, construction and test of safety logic assemblies used in safety systems to perform category A safety functions (in accordance with IEC 61226). Safety logic assemblies include logic such as the hardwired logic assembly interfacing computer-based systems to switchgear, actuators or contactors to provide trip or engineered safety feature actuations. Safety logic assemblies are significant parts of a safety system and may include voting logic between redundant channels. This document provides a general description of safety logic assemblies for safety actuators control. The principles to meet dependability objectives are presented. The main features relating to the design requirements are described and explained. This new edition includes the following significant technical changes with respect to the previous edition: a) update of the references to standards published or revised since the issue of the first edition of the current standard, including IEC 61513 and IEC 61226; b) additional requirements for operational and maintenance bypass use; requirements of voting logic; and others.
英文名称Nuclear power plants - Instrumentation and control systems important to safety - Safety logic assemblies used in systems performing category A functions: Characteristics and test methods