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CLIC CES W ebex 12 Nov. 2008

CLIC CES W ebex 12 Nov. 2008. Summary: Set of fire safety measures defined in CERN Safety Report Proposed Structure for CLIC/ILC Fire Safety Report. Fabio Corsanego Fire Safety CERN-SC . Structure of the safety report. The Safety Report is subdivided in several parts..

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CLIC CES W ebex 12 Nov. 2008

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  1. CLIC CES Webex 12 Nov. 2008 • Summary: • Set of fire safety measures defined in CERN Safety Report • Proposed Structure for CLIC/ILC Fire Safety Report Fabio Corsanego Fire Safety CERN-SC

  2. Structure of the safety report The Safety Report is subdivided in several parts.. • Description of the hazards (non mitigated yet) • Measures to mitigate the hazard: • Prevention • A Design • B Organization • Protection • C Design • D Organization

  3. Basic Assumptions “Low fire load” in the tunnels Fire radiologic risk localized in few specific points (collimators, experiments)

  4. A) Prevention-design (1) • Subdivision into ventilation sectors • Possibility to increase ventilation flow in the tunnel ( to 2 m/s) 2 m/s

  5. A) Prevention –Design (2) • Pressurized access shafts P>0 Fire Rated 2 hrs

  6. A) Prevention-design (3) • All zones with “periodic access” have multiple way out • Evacuation system • Automatic Fire detection in areas with relevant fire load

  7. A) Prevention- design (4) • Electric Vehicles for Fire Brigade • Areas with large fire loads have internal hydrants • Warm magnets are interlocked with thermal detection

  8. B) Prevention-organization (1) • Temporary storage of combustibles forbidden • Regular maintenance of the automatic detection system • Fire Brigade has materials and resources adapted to the hazards.. • Hot work permits • No smoking facility

  9. C) Protection -design • Fire retardant no halogen cables and plastics • Emergency call points every 60m with evacuation buttons and phones • Emergency light and signs • Foam system in the cavern

  10. D) Protection - Organization • Fire brigade has intervention procedures including smoke extraction • Manual fire fight means (extinguishers, hydrants, are localized where there is large fire load) • Training for workers • Self rescue breathing devices

  11. Resume’ • The combustible amount is low, exception made for about 90 locations. • A large fraction of this combustibles burn with difficulty • The fire risk has been judged moderate • Experiments have foam deluge systems Residual risk: • If a fire happens underground people will have to reach an exit located, at worst, at 2.5 km distance • Breathing device to assist for 30 minutes in the smoke • Potentially a relevant fire damage to equipment • In case of fire, fire brigade will try to reach the spot (can take 60* minutes) an initiate fire fightwith manual extinguishers or, in few locations, with hydrants • The ventilation can be increased to help to reach the spot

  12. T=0: fire and smoke starts travelling in tunnel • t-=~ 20 min: smoke is detected; Fire Brig. Alerted • T=~25 min: the machine stopped; Fire truck on the way • T=~35mins: Smoke could reach outside if not filtered • T=~40mins Fire truck on surface • T=~50mins Fire twin underground (if RP ok) • T=~65 mins Fire Twins reaches the fire (if air is still sufficient) • T=~70 fire twins air is maybe over and have to be changed • And so on

  13. Proposed strategy for ILC-CLIC • No reference codes yet, but we should have at least 2 objectives: • Protect life= reach a safe area leading outside in less that 2-3 minutes • Protect property= damage contained to less that ?x (value should be indicated here)? in case of accident

  14. Proposed Structure for Fire Safety Report INTRODUCTIVE NOTES • ReferenceCodes for FirePrevention • Description of the facilityfrom the fireSafety Point of View DESIGN CONDITIONS: • Characteristicsof the Occupants • Abilityand Resources of the Fire Service • SpecialHazards in case of Fire, and Emergency Plan • FireLoad MEASURES TO PREVENT THE INSURGENCY OF A FIRE • Propertiesof the Combustible Materials • Protection againstElectric Faults • LightningProtection • WorksiteOrganization (firepermitsetc, work coordination)

  15. ESCAPE IN THE EVENT OF A FIRE • Escape Strategy • Type of Stairways and Access Ways • Internalevacuationpathways • TravelDistance to Reach an Exit • Doors • Access Control Locking • Guidance Signs for escape • Emergency Lighting • Evacuation Alarm • Communication Devices PROTECTION AGAINST THE SPREAD OF FIRE BETWEEN COMPARTMENTS • Subdivision intoFireCompartments • Fire Resistance Class of Structural and Non-structural ElementsSeparating the FireCompartments: • Technicalrooms on surface

  16. FACILITIES FOR FIREFIGHT: • Access routes for the rescue service: • Firegasventilation; • Equipment for ManualFireFighting: • Communication Systems; HEATING, VENTILATION AND AIR CONDITIONING (HVAC), and SMOKE EXTRACTION • General aspects common to the wholefacility • Commands(stop and activation) for the ventilation and smoke extraction system • Fireprotection construction of plant rooms and shafts • Protected Access Shaft • TUNNEL and Transfer line VENTILATION • Exepriment Hall Ventilation and SmokeExtraction

  17. FIRE PROTECTION INSTALLATIONS • Automaticfiredetection • Evacuation alarm system • AutomaticFire suppression Systems

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