核设施.对安全重要的仪表和控制.辐射监测系统（RMS）:特性和生命周期

[中文适用范围]： 本文件规定了辐射监测系统（RMS）的生命周期管理要求，并提供了关于现有IEC标准在系统和设备设计与鉴定方面应用的指导。 本文件的目的是规定RMS生命周期管理的要求并提供应用指导。本文件旨在与涉及辐射监测器、放射性材料采样、仪器校准、硬件和软件设计、分类和鉴定的最新国际标准保持一致。除非本文件另有规定，否则最高级别的IEC SC 45A标准IEC 61513和第二级别的IEC SC 45A标准适用于RMS。 本文件适用于安装在核设施中的RMS，用于正常运行、预期运行事件（AOO）、设计基准事故（DBA）和设计扩展条件（DEC），包括严重事故（SA）。本文件中的技术指导适用于核设施，尽管在RMS的设计和运行生命周期中考虑了各个设施的具体功能。 实验室分析和相关样品提取是完整的流出物监测计划和燃料移除调查的重要组成部分，不在本文件范围内。 [外文原描述]： IEC 62705:2022 gives requirements for the lifecycle management of radiation monitoring systems (RMS) and gives guidance on the application of existing IEC standards covering the design and qualification of systems and equipment. The purpose of this document is to lay down requirements for the lifecycle management of RMSs and give application guidance. This document is intended to be consistent with the latest versions of International Standards dealing with radiation monitors, sampling of radioactive materials, instruments calibration, hardware and software design, classification, and qualification. This document is applicable to RMSs installed in nuclear facilities intended for use during normal operation, anticipated operational occurrences (AOO), design basis accidents (DBA) and design extension conditions (DEC), including severe accidents (SA). This second edition cancels and replaces the first edition published in 2014. This edition includes the following significant technical changes with respect to the previous edition: - modification of the title. - to be consistent with the categorization of the accident condition. - to update the references to new standards published since the first edition. - to update the terms and definitions.