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NB/T 20695 —2023 I 目次 前言 ................................ ................................ ................ III 1 范围 ................................ ................................ ............... 1 2 规范性引用文件 ................................ ................................ ..... 1 3 术语和定义 ................................ ................................ ......... 1 4 鉴定的一般要求 ................................ ................................ ..... 1 5 鉴定的实施 ................................ ................................ ......... 2 5.1 鉴定大纲 ................................ ................................ ....... 2 5.2 鉴定试验项目 ................................ ................................ ... 2 5.3 鉴定试验程序的编写 ................................ ............................. 2 5.4 试验和测量用大气条件 ................................ ........................... 3 5.5 鉴定裕度 ................................ ................................ ....... 3 5.6 鉴定样本设备 ................................ ................................ ... 3 5.7 验收准则 ................................ ................................ ....... 3 6 基准试验及基准试验的复试 ................................ ........................... 3 6.1 概述 ................................ ................................ ........... 3 6.2 目视检查和机械检查 ................................ ............................. 3 6.3 绝缘电阻测试 ................................ ................................ ... 4 6.4 分布电容测试 ................................ ................................ ... 4 6.5 坪长、坪斜的测试 ................................ ............................... 4 6.6 热中子灵敏度 ................................ ................................ ... 4 6.7 γ感应度/γ灵敏度测试 ................................ ........................... 4 6.8 本底的测试 ................................ ................................ ..... 4 7 环境试验 ................................ ................................ ........... 4 7.1 概述 ................................ ................................ ........... 4 7.2 高温试验 ................................ ................................ ....... 5 7.3 低温试验 ................................ ................................ ....... 5 7.4 高气压试验 ................................ ................................ ..... 5 7.5 恒定湿热 试验 ................................ ................................ ... 5 7.6 电磁兼容试验 ................................ ................................ ... 5 7.7 辐照试验 ................................ ................................ ....... 5 8 老化处理试验 ................................ ................................ ....... 5 8.1 概述 ................................ ................................ ........... 5 8.2 热老化试验 ................................ ................................ ..... 6 8.3 交变湿热试验 ................................ ................................ ... 6 8.4 辐照老化试验 ................................ ................................ ... 6 8.5 振动老化试验 ................................ ................................ ... 6 9 设计基准事件条件 试验 ................................ ............................... 7 NB/T 20695 —2023 II 9.1 概述 ................................ ................................ ........... 7 9.2 抗地震试验 ................................ ................................ ..... 7 9.3 模拟事故 工况辐照环境 试验 ................................ ....................... 7 9.4 模拟事故 工况热力环境和化学喷淋 /浸没环境 试验 ................................ .... 7 9.5 模拟事故后环境 试验 ................................ ............................. 8 10 探测器组合件 的特性试验 ................................ ............................ 9 10.1 概述 ................................ ................................ .......... 9 10.2 测量范围及线性偏差试验 ................................ ........................ 9 10.3 燃耗寿命 试验 ................................ ...........................
NB-T 20695-2023 核电厂堆外中子探测器鉴定
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