后台
Fauske和Associates公司、LLC公司向核设备制造商和供应商、OEMs公司和公用事业提供关键支持,提供各种服务测试,使设备、零件和组件符合多项应用条件,包括温和和严酷核环境NRC指南并满足工工厂特有需求
材料测试实验室还配有工具,包括Fourier变换红外线分光计,用于物证识别测试等各种应用此外,老化材料可评价环境条件对材料的反应
材料性能测试使用INSTRON材料属性测试机交付,该测试机能进行行业标准测试,包括抗拉强度和强度测试,以确定组件机械性能
后台
核电站1E级设备安全相关设备对安全关闭反应器至关重要,在地震活动时必须安全。换句话说,必须保证设备按地震事件期间和之后设计运行。通过在震电表测试设备可获取保证条件。可跟踪IEEE获取条件电气电子工程师学院标准344内含推荐方法,对核电站1E级设备进行地震认证实践应用以确保设备能够在安全关机地震期间和之后满足性能需求
振荡系统
分析地震事件对厂房设备的影响时需要基本机械振荡知识。
图1
图1可理解为安装到地面的泵或电箱等工厂组件的简单图解地震期间,地面运动称为基调振荡。视组件的僵硬性、质量和阻塞特征而定,设备将经历振荡运动(响应)。如果基调振荡频率与组件自然频率重合,响应可能是暴力的。这叫共振。应时避免共振状态地震事件由非规律时间变换组成 。 但它通常覆盖一定频率范围, 以网站地理位置为基础 。 因此, 构件设计方式不应显示自然频率超出预期地震频率范围 。 Damping可分解振动响应的某些能量 。 额外冲波或摩擦工厂可选用自然频率无法充分设计为“ 离位 ” 。
地震测试
The equipment to be tested is mounted in a plant typical arrangement to the table. Before any testing, the equipment should be checked for functionality. Once the functionality is assured, either a sine sweep resonance search or a multi frequency random noise excitation is conducted to detect the natural frequencies of the equipment. This is also done to demonstrate that the mounting configuration is sufficiently rigid. For that activity the equipment is typically instrumented with a sufficient number of accelerometers. The equipment will then undergo five (5) Operating Basis Earthquake (OBE) and finally one (1) Safe Shutdown Earthquake (SSE) profiles. The Required Response Spectra (RRS) for these tests constitute a requirement to be met by the shake table time history motion. The RRS are predetermined by analysis and entered into the controller of the seismic table. They depend on various factors such as the location, the building and the bedrock. During the test, the accelerometers are used to record the Test Response Spectra (TRS). The TRS must exceed or envelope the RRS, which is typically shown by overlaid plots. The equipment shall be in operational mode during the tests and monitored for performance. A post test functionality check shall also be performed. If the equipment performs well, is free of material failures, structurally intact and the TRS exceeded the requirement, then the equipment can be classified as Class 1E. Figure 2 is a photograph of a component that was tested on a seismic shake table.
必须指出,IEE344标准包含比这里介绍的进一步实践。
图2
