TMALL 0141 Presentation v 1.0 A concept for simplified Fixed Fire Fighting System: Northern link, Stockholm Ulf Lundström, TSO Swedish Transport Administration.

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Presentation transcript:

TMALL 0141 Presentation v 1.0 A concept for simplified Fixed Fire Fighting System: Northern link, Stockholm Ulf Lundström, TSO Swedish Transport Administration

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4 Northern Link: Part of ring road project 3,5 km long, in all 15 km of tunnels

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6 Basic fire safety concept: Free flow traffic

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8 Fresh air

9 2004: Southern Link opens for traffic: vehicles /day, estimated = Slow traffic

: The tunnel closing when cogestion occurs.

The safety concept of the Northen Link is uppdated in four aspects: Improved detection Improved traffic controll and management Improved message handling to users Fixed Fire Fighting System

12 Fixed Fire Fighting System in the Northern Link: Safety, not asset protection No traditional tunnel sprinkler Focus on cost effectivenes, robustnes and mantainability

13 Design solutions: Long sections (75 m) Low pressure, large droplets Extended coverage nozzles City water supply, no pumps Remtotely operated membrane valves Starts automatically at 90 C in heatdetection cable Protected against corrosion and freezing

14 FFFS in the project Northern link

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25 General data: Number of sections: 230 Total length: ca 15 km Investment cost: 72 Msek (7 M€) Investment cost per km: 5 Msek (0,5 M€) Experiences since nov 2014: No fires No false activations 100% availability 100% reliability (test once a year) No service or repairs required

26 Tests conducted in cooperation with SP Water distribution tests at different air speeds Visibility in a activated section Visibility from a moving car in a activated section Test of evacuation by foot through a activated section Fire tests: risk of fire spread between vehicles, 6 MW propan flame Activation in winter conditions (- 6 grader C)