BS IEC 62855:2016提供了交流和直流分析的电工工程指南 为了证明 电源和配电系统具有安全运行和关闭的能力 关闭核电站，在预期运行事件发生后使其处于受控状态 或事故状态，最终达到安全状态。本文件中讨论的分析研究保证了设计依据 满足其在制造商生产的条件下的功能要求 适用的设计基准事件。这些研究为电力供应提供了保证 系统能够在所有要求的电厂条件下支持安全功能。注:与核电厂设计相关的IAEA特定安全要求SSR-2/1中描述了安全功能。分析研究验证了设计裕度的稳健性和充分性，并证明 电力系统支持电厂正常、异常运行的能力， 降级和事故条件。这些分析用于验证电力系统是否能够承受较小的压力 以及重大干扰或故障的后果不会降低 电力系统支持电厂安全停堆和维护的能力 工厂处于关闭状态。这些分析是通过一个或多个经过验证的模拟工具（软件和硬件）、手工计算和测试来执行的。本文件提供了所需分析类型的指南，以证明 电厂的辅助电源系统可以执行所需的安全功能。这份文件 未提供应如何进行分析的具体细节。 本文件不包括数字控制器（例如整流器、逆变器、， 电力系统中使用的定序器和电气保护装置）。IEC 61513 给出了适用于电子控制和保护元件的建议 电力系统。本文件不包括环境条件（即温度、湿度等）或 可能发生的外部事件（地震、洪水、火灾、高能电磁脉冲等） 影响设备尺寸或保护要求。外部事件和闪电 包括地磁暴。本文件不包括独立电源的额外或独特要求 系统，例如核电站安全措施的电源。本协议的相关条款 文件可用作此类系统的指南。交叉引用:IEC 60034IEC 60038IEC 60364IEC 60364-5-52IEC 60479IEC 6080IEC 60909IEC 60964IEC 61500IEC 61225IEC 61508IEC 61508-1IEC 61508-2IEC 61508-3IEC 61508-4IEC 61513IEC 61660IEC 62003IEC 62138IEC 62271-200IEC 62305IEC 62305-3IEC 62305-4IEC 62340IEC 62342IEC 62443IEC 62645IEC 62671IEC 6306ISO/IEC 27001ISO/IEC 27002GS- G-3.1IEA GS-G-3.5IAEA GS-R-3IAEA SSG-30IAEA SSG-34IAEA SSG-39IAEA SSR-2/1:2012IEA NG-T-3.8IAEA NSS 17IAEA安全术语表:2016IAEA TECDOC 1770购买本文件时提供的所有当前修订版均包括在内。

BS IEC 62855:2016 provides the electrotechnical engineering guidelines for analysis of AC and DC electrical power systems in nuclear power plants (NPPs) in order to demonstrate that the power sources and the distribution systems have the capability for safe operation and shut down of the NPP, bringing it to a controlled state after an anticipated operational occurrence or accident conditions and finally reaching a safe state.The analytical studies discussed in this document provide assurance that the design bases are satisfied to meet their functional requirements under the conditions produced by the applicable design basis events. The studies provide assurance that the electrical power system is capable of supporting safety functions during all required plant conditions.NOTE The safety functions are described in IAEA Specific Safety Requirements SSR-2/1 related to the design of the nuclear power plants.Analytical studies validate the robustness and adequacy of design margins and demonstrate the capability of electrical power systems to support plant operation for normal, abnormal, degraded and accident conditions.The analyses are used to verify that the electrical power system can withstand minor disturbances and that the consequences of major disturbances or failures do not degrade the capability of the electrical power systems to support safe shutdown of the plant and maintain the plant in shutdown condition.The analyses are performed with one or more ofsimulation tools (software and hardware) that have been verified and validated,hand calculations, andtests.This document provides guidance on the types of analyses required to demonstrate that the plant's auxiliary power system can perform the required safety functions. This document does not provide specific details on how the analysis should be conducted.This document does not cover digital controllers (such as controllers for rectifiers, inverters, sequencers and electrical protection devices) used in electrical power systems. IEC 61513 gives recommendations that apply to the electronic controls and protective elements of the electrical power systems.This document does not include environmental conditions (i.e. temperature, humidity, etc.) or external events (seismic, flooding, fire, high energy electromagnetic pulse, etc.) that may impact equipment sizing or protection requirements. The external events lightning and geomagnetic storms are included.This document does not cover additional or unique requirements for stand-alone power system, such as power supplies for security measures in NPPs. Pertinent clauses of this document may be used as a guideline for such systems.Cross References:IEC 60034IEC 60038IEC 60364IEC 60364-5-52IEC 60479IEC 60880IEC 60909IEC 60964IEC 61000IEC 61225IEC 61508IEC 61508-1IEC 61508-2IEC 61508-3IEC 61508-4IEC 61513IEC 61660IEC 62003IEC 62138IEC 62271-200IEC 62305IEC 62305-1IEC 62305-3IEC 62305-4IEC 62340IEC 62342IEC 62443IEC 62566IEC 62645IEC 62671IEC 63046ISO/IEC 27001ISO/IEC 27002IAEA GS-G-3.1IAEA GS-G-3.5IAEA GS-R-3IAEA SSG-30IAEA SSG-34IAEA SSG-39IAEA SSR-2/1:2012IAEA NG-T-3.8IAEA NSS 17IAEA Safety Glossary:2016IAEA TECDOC 1770All current amendments available at time of purchase are included with the purchase of this document.