Full-scale fire experiments on vertical and horizontal cable trays

Johan Mangs, Olavi Keski-Rahkonen

Research output: Book/ReportReport

3 Citations (Scopus)

Abstract

Two full-scale fire experiments on PVC cables used in nuclear power plants were carried out, one with cables in vertical position and one with cables in horizontal position. The vertical cable bundle, 3 m high, 300 mm wide and 30 mm thick, was attached to a steel cable ladder. The vertical bundle experiment was carried out in nearly free space with three walls near the cable ladder guiding air flow in order to stabilise flames. The horizontal cable experiment was carried out in a small room with five cable bundles attached to steel cable ladders. Three of the 2 m long cable bundles were located in an array, equally spaced above each other near one long side of the room and two correspondingly near the opposite long side. The vertical cable bundle was ignited with a small propane gas burner beneath the lower edge of the bundle. The horizontal cable bundles were ignited with a small propane burner beneath the lowest bundle in an array of three bundles. Rate of heat release by means of oxygen consumption calorimetry, mass change, C02, CO and smoke production rate and gas, wall and cable surface temperatures were measured as a function of time, as well as time to sprinkler operation and failure of test voltage in cables. Additionally, the minimum rate of heat release needed to ignite the bundle was determined. This paper concentrates on describing and recording the experimental set-up and the data obtained.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages108
ISBN (Print)951-38-5077-3
Publication statusPublished - 1997
MoE publication typeNot Eligible

Publication series

SeriesVTT Publications
Number324
ISSN1235-0621

Fingerprint

Fires
Cables
Experiments
Ladders
Propane
Gas burners
Steel
Calorimetry
Fuel burners
Smoke
Polyvinyl chlorides
Nuclear power plants
Oxygen

Keywords

  • fire tests
  • fire prevention
  • fires
  • cables
  • burning velocity

Cite this

Mangs, J., & Keski-Rahkonen, O. (1997). Full-scale fire experiments on vertical and horizontal cable trays. Espoo: VTT Technical Research Centre of Finland. VTT Publications, No. 324
Mangs, Johan ; Keski-Rahkonen, Olavi. / Full-scale fire experiments on vertical and horizontal cable trays. Espoo : VTT Technical Research Centre of Finland, 1997. 108 p. (VTT Publications; No. 324).
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Mangs, J & Keski-Rahkonen, O 1997, Full-scale fire experiments on vertical and horizontal cable trays. VTT Publications, no. 324, VTT Technical Research Centre of Finland, Espoo.

Full-scale fire experiments on vertical and horizontal cable trays. / Mangs, Johan; Keski-Rahkonen, Olavi.

Espoo : VTT Technical Research Centre of Finland, 1997. 108 p. (VTT Publications; No. 324).

Research output: Book/ReportReport

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AB - Two full-scale fire experiments on PVC cables used in nuclear power plants were carried out, one with cables in vertical position and one with cables in horizontal position. The vertical cable bundle, 3 m high, 300 mm wide and 30 mm thick, was attached to a steel cable ladder. The vertical bundle experiment was carried out in nearly free space with three walls near the cable ladder guiding air flow in order to stabilise flames. The horizontal cable experiment was carried out in a small room with five cable bundles attached to steel cable ladders. Three of the 2 m long cable bundles were located in an array, equally spaced above each other near one long side of the room and two correspondingly near the opposite long side. The vertical cable bundle was ignited with a small propane gas burner beneath the lower edge of the bundle. The horizontal cable bundles were ignited with a small propane burner beneath the lowest bundle in an array of three bundles. Rate of heat release by means of oxygen consumption calorimetry, mass change, C02, CO and smoke production rate and gas, wall and cable surface temperatures were measured as a function of time, as well as time to sprinkler operation and failure of test voltage in cables. Additionally, the minimum rate of heat release needed to ignite the bundle was determined. This paper concentrates on describing and recording the experimental set-up and the data obtained.

KW - fire tests

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Mangs J, Keski-Rahkonen O. Full-scale fire experiments on vertical and horizontal cable trays. Espoo: VTT Technical Research Centre of Finland, 1997. 108 p. (VTT Publications; No. 324).