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Thermal malfunction criteria of fire safety electrical equipment in nuclear power plants

机译:核电厂消防安全电气设备的热故障准则

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摘要

Malfunctions of nuclear power plants' (NPP) fire safety electrical equipment may be the consequence of a fire, leading to an increase of temperature and heat fluxes in a room and its adjacent ones. Electrical equipment manufacturers issue a so-called 'maximum temperature of normal operation' under which a continuous function is guaranteed. However, this manufacturer temperature does not correspond to the notably higher real maximum operating temperature. Exactly knowing this temperature has two impacts: adequate selection of fire safety equipment and new fire probabilistic risk assessment (PRA) damage threshold. Those levels are today very conservative for performance-based design: 40℃ for electronic boards and 55℃ for electromechanical materials. That is why Electricite de France, Research and Development Division (EDF R&D), performed several tests in the MILONGA facility to investigate the thermal malfunction levels of cabinet equipment classified as 'Important for Safety' by 1. first defining what malfunction means, according to the material type and its required function; 2. defining a relevant and reliable methodology of tests; 3. testing a sample of electromechanical materials and electronic boards used in NPP and 4. suggesting new temperature criteria for Fire PRA. Although the equipment behaviour may be dependent upon the materials of construction and equipment layout, the main results are the malfunction temperatures of 130℃ for electromechanical materials and 95℃ for electronic boards.
机译:核电厂(NPP)的消防安全电气设备故障可能是起火的结果,导致房间及其附近房间的温度和热通量增加。电气设备制造商发布所谓的“正常运行的最高温度”,以保证连续运行。但是,该制造商温度并不对应于明显更高的实际最大工作温度。确切知道此温度有两个影响:适当选择消防安全设备和新的火灾概率风险评估(PRA)损坏阈值。如今,对于基于性能的设计,这些水平非常保守:电子板40℃,机电材料55℃。因此,法国电力研发部(EDF R&D)在MILONGA设施中进行了几项测试,以调查被归类为“安全重要”的机柜设备的热故障等级,具体方法如下:1.首先确定故障的含义,根据材料类型及其所需功能; 2.定义相关且可靠的测试方法; 3.测试NPP中使用的机电材料和电子板的样品,并4.提出Fire PRA的新温度标准。尽管设备的性能可能取决于构造和设备布局的材料,但主要结果是机电材料的故障温度为130℃,电子板的故障温度为95℃。

著录项

  • 来源
    《Fire and materials》 |2013年第2期|151-159|共9页
  • 作者单位

    Electricite de France, Research and Development Division (EDF R&D), 6 quai Watier, 78400 Chatou, France;

    Electricite de France, Research and Development Division (EDF R&D), 6 quai Watier, 78400 Chatou, France;

    EDF SEPTEN, 12-14 avenue Dutrievoz, 69100 Villeurbanne, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fire safety; electrical equipment; malfunction criteria; nuclear power plants;

    机译:消防安全;电子设备;故障标准;核电厂;
  • 入库时间 2022-08-18 00:11:20

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