標準號：BS EN 61226-2010
中文標準名稱：核電廠.儀表和控制的重要安全性.儀表和控制功能分類
英文標準名稱：Nuclear power plants - Instrumentation and control important to safety - Classification of instrumentation and control functions
標準類型：F69
發(fā)布日期：2009/9/30 12:00:00
實施日期：2009/9/30 12:00:00
中國標準分類號：F69
國際標準分類號：27.120.20
引用標準：IEC 60671-2007;IEC 60709;IEC 60780;IEC 60812;IEC 60880-2006;IEC 60964;IEC 60965;IEC 60980;IEC 60987;IEC 61000-4;IEC 61000-6-2;IEC 61513-2001;IEC 61771;IEC 61772;IEC 61839;IEC 62138;IAEA NS-R-1-2000;IAEA GS-R-3-2006;IAEA NS-G-1.3-2002
適用范圍：This International Standard establishes a method of classification of the information andcommand functions for nuclear power plants, and the I&C systems and equipment thatprovide those functions, into categories that designate the importance to safety of thefunction. The resulting classification then determines relevant design criteria.The design criteria are the measures of quality by which the adequacy of each function inrelation to its importance to plant safety is ensured. In this standard, the criteria are those offunctionality, reliability, performance, environmental durability (including seismic) and qualityassurance (QA).This standard is applicable to all the information and command functions and the instrumentationand control (I&C) systems and equipment that provide those functions. The functions,systems and equipment under consideration provide automated protection, closed or openloop control and information to the operating staff. They keep the NPP conditions inside thesafe operating envelope and provide automatic actions, or enable manual actions, thatprevent or mitigate accidents, or that prevent or minimize radioactive releases to the site orwider environment. The I&C functions that fulfil these roles safeguard the health and safety ofthe NPP operators and the public.This standard follows the general principles given in IAEA safety code NS-R-1 and safetyguide NS-G-1.3, and it defines a structured method of applying the guidance contained inthose codes and standards to the I&C systems that perform functions important to safety in aNPP. This standard should be read in association with the IAEA guides and IEC 61513 inimplementing the requirements of IEC 61508 series.