Fire behavior of halogen-free flame retardant electrical cables with the cone calorimeter

JOURNAL OF HAZARDOUS MATERIALS

卷:342

Article

Meinier, Romain¹  Sonnier, Rodoiphe¹  Zavaleta, Pascal²  Suard, Sylvain²  Ferry, Laurent¹ 

[1] Ecole Mines Ales, Ctr Mat Mines Ales, Pole Mat Polymeres Avances, 6 Ave Clavieres, F-30319 Ales, France

[2] IRSN, PSN RES, SA2I, LEF, F-13115 St Paul Les Durance, France

关键词: Halogen-free flame retardant;    Thermally thick behavior;    Fire behavior;    Cone calorimeter;    Cable spacing;   

DOI  :  10.1016/j.jhazmat.2017.08.027

来源: Elsevier

【 摘 要 】

Fires involving electrical cables are one of the main hazards in Nuclear Power Plants (NPPs). Cables are complex assemblies including several polymeric parts (insulation, bedding, sheath) constituting fuel sources. This study provides an in-depth characterization of the fire behavior of two halogen-free flame retardant cables used in NPPs using the cone calorimeter. The influence of two key parameters, namely the external heat flux and the spacing between cables, on the cable fire characteristics is especially investigated. The prominent role of the outer sheath material on the ignition and the burning at early times was highlighted. A parameter of utmost importance called transition heat flux, was identified and depends on the composition and the structure of the cable. Below this heat flux, the decomposition is limited and concerns only the sheath. Above it, fire hazard is greatly enhanced because most often non flame retarded insulation part contributes to heat release. The influence of spacing appears complex, and depends on the considered fire property. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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