Vehicle Response

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Response information is for reference. We recommend attending an emergency response workshop to better understand the properties of hydrogen and fuel cell electric vehicles.

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Vehicle Response

  1. 1. Follow SOPs for vehicle response …and, pay attention to the unique items for hydrogen-powered fuel cell electric vehicles Scene Size-Up Identify Isolate Rescue Wrap Up
  2. 2. Identify Typically decals and graphics identifying car as an FCEV Blue diamond sticker on rear- SAE example (no standards, yet) Never assume the vehicle is off Scene Size-Up Identify
  3. 3. Identify
  4. 4. H2 release indicators Compressed H2 Very loud hissing (almost all leaks will be audible) PRD/TRD release  controlled high-pressure hydrogen rapid release through safety vent • Occurs if tanks are exposed to high-temperature heat (e.g. – fire) Never cut into hydrogen lines Scene Size-Up Identify
  5. 5. High-voltage systems Never cut into highvoltage systems • Designed to quickly dissipate • charge in lines Charge can be retained when system is off Lines are marked orange Scene Size-Up Identify
  6. 6. Isolate Multiple vehicles and different fuels Isolate FCEVs are heavier than conventional vehicles When safe, move the conventional vehicle away from the FCEV • Heat from gas fire can trigger TRD/PRD Spray foam on gasoline or diesel leaks near FCEV • Let hydrogen fed fires burn out if safe to do so
  7. 7. Rescue: extrication Avoid the PRD/TRD vent Stabilize & disable Follow any “Emergency/ Manual Shut Down” procedure Dash roll: Avoid using cutters or spreaders on rocker panel-- • Hydrogen and/or high voltage lines may be present Rescue
  8. 8. Extrication Dash roll: for a purchase point on the rocker panel… • Cradle or saddle • Notch the rocker panel Relief cut OK • Bottom of A post • Between hinges Avoid cutting through underside of vehicle Rescue
  9. 9. Rescue: fires Let a hydrogen flame or plume burn • Fire will extinguish when fuel is gone Cover exposures Use standard suppression techniques for all nonhydrogen fed fires Rescue
  10. 10. Emergency response Fire response: (as with natural gas) • Vehicle: Let a hydrogen plume burn • Station: shut off the flow of gas; let all hydrogen burn itself off* • *recommend dry powder extinguisher if the hydrogen flame must be extinguished • Cool/protect other exposures

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