Experimental study in open atmosphere and confined conditions of fire spread between adjacent electrical cabinets connected by cable trays

工程类 耐火试验 消防安全 架空(工程) 电气工程 环境科学 结构工程 海洋工程 土木工程
作者
Pascal Zavaleta,Sylvain Suard
出处
期刊:Fire Safety Journal [Elsevier BV]
卷期号:140: 103872-103872
标识
DOI:10.1016/j.firesaf.2023.103872
摘要

Electrical cabinet-related fire events are among the most recorded fire events in nuclear power plants. As part of the OECD PRISME-3 project, four fire tests were carried out to highlight the fire spread paths from an open-door electrical cabinet (CC) to two adjacent closed-door electrical cabinets (ACs). The cabinets, separated by a double wall with an air gap, were connected by overhead and subfloor cable trays. These last ones were filled with either a “low” or “well-qualified” (LQ or WQ, respectively) cable type. Each cable type was used for two tests. In addition, tests were conducted either in open atmosphere conditions (two) or in confined and mechanically ventilated conditions (two). These tests highlighted three fire spread paths from the CC to the ACs. Regarding the first one through the double wall with an air gap, several ignitions of electrical components (used as targets) occurred in the ACs when the wall temperature near the ignited target exceeded 600 °C (or the heat flux incident to the target was higher than 26 kW/m2) whatever the test conditions. Furthermore, the two other fire spread paths through the overhead and subfloor cable trays were highlighted only if the LQ cable type was used.
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