修正和改装能力英中对照翻译文件

7.1.9 Capability for modification and backfitting 修正和改装能力

At present, lifetime of I&C systems and equipment is about 20 years. This means that it is necessary to replace I&C systems and equipment at least once during the plant lifetime. The design and implementation of I&C systems and equipment shall be done in such a way as to facilitate backfitting, replacements and modifications and make them economically feasible. I&C系统和设备目前的寿命大约是20年。这意味着在电站使用寿命内至少需要更换一次I&C系统和设备。I&C系统和设备的设计与实施应能为改装、更换与修正提供方便，使之经济可行。

The structure of the I&C system shall be modular. The I&C systems should be designed in such a way that open architecture principles and standardized interfaces based on internationally accepted standards are used. I&C系统的结构应是模数式的。I&C系统的设计应使开放性建筑原则和以国际认可标准为依据的标准化界面得以使用。

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For modifications and backfitting, there shall be sufficient spare capacity. The spare capacity shall be based on the analyses of the anticipated modification and backfitting needs. The spare capacity shall be specified for the following categories at least: 对于修正和改装来说，应有充足的备用容量。备用容量应依据对预期修正和改装需要的分析。备用容量至少应分为以下类型：
? Space in electronic rooms and cabinets, 电子仪表室和箱内的空间
? Terminals for the possible connection for future I&C equipment, 用于未来I&C设备可能性连接的终端设备
? Memory and processing capacity in computerized systems, 计算机化系统内的存储和处理能力
? Capacity in data transfer. 数据传输能力
The applicable minimum design targets for the spare capacity are: 备用容量的可适用最低设计目标为：
? 20 % spare capacity for measurement and drive control cards and inputs 20%的备用容量用于测量和驱动控制卡片和输入
? 20 % spare capacity for I&C system software memory and processing20%的备用容量用于I&C系统软件存储和处理
? 20 % spare capacity for data transfer with possibility to add new data transfer interfaces 20%的备用容量用于数据传输，以及增加新数据传输界面的可能性
? 100 % spare capacity for the data storage and processing of information or equivalent possibility for expansion. 100%的备用容量用于数据存储和信息处理，或同等的扩展可能性

There should be long term support from the system manufactures to guarantee the supply of spare parts and technical know-how for the I&C systems during their lifetime. 系统制造商应提供长期支持，以保证在I&C系统寿命内为其提供备用部件和工艺技术。

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