Module V : Emergency Operations
description
Transcript of Module V : Emergency Operations
NFPA ELECTRIC VEHICLE SAFETY FOR EMERGENCY RESPONDERS
Module V:Emergency Operations
5-1
NFPA ELECTRIC VEHICLE SAFETY FOR EMERGENCY RESPONDERS
Module V: Emergency Operations
Analyze simulated crash scenes to determineappropriate actions.
Terminal Objective
● Identify unique extrication challenges incrashes involving P/HEVs and EVs.
● Determine appropriate actions to extinguish a P/HEV or EV fire.
● Determine appropriate actions to handle a fire involving a P/HEV or EV battery.
Enabling Objectives
5-2
Module V Objectives
Introduction● Many procedures for response to
P/HEV and EV incidents are the same as for a conventional incident.
● However, there are some important differences. Learning to take appropriate action at P/HEV and EV incidents is critical.
5-3
NFPA ELECTRIC VEHICLE SAFETY FOR EMERGENCY RESPONDERS
Module V: Emergency Operations
Emergency Topics Addressed:
● Initial Response Procedures● Extrications● Battery Breaches● Submersion● Fire and Overhaul● Incidents involving charging stations
5-4
Module V Outline
Initial Procedures
● Scene Size Up.
● Utilize appropriate PPE for operations.
5-5
Identify
Immobilize
Disable
ExtricationStabilization● Standard cribbing methods are acceptable.
● Always place cribbing at vehicle structural points.
● Avoid fuel lines, high voltage cabling, etc.
5-6
Extrication● High voltage
components and cabling are usually not in typical “cut points.”
● Before conducting extrication operations, determine location of:● Occupant
Protection Systems● High Voltage
Components
5-7
Impact of Battery Location
● Trunk Tunneling - Some models’ batteries are located behind the rear seat.
● Through the Floor - high voltage cabling and batteries may be in the way.
5-8
Extrication
High Strength Steel● High strength / low weight metals are
used frequently in P/HEVs and EVs to enhance safety and fuel economy.
● Rescue tools that are suitable for these high strength metals must be used.
5-9
Extrication
Battery Breach
● Unlikely due to location and protective cases.
● Batteries are dry cell. Only a small amount of electrolyte would leak if crushed.
● Some models will leak liquid coolant.
● There is high voltage electrical shock hazard if a battery is breached.
● Follow local medical protocols in the event of exposure to electrolyte.
5-10
VideoVehicle
Submersion
5-11
Submersion● Vehicle shell is designed to not be a shock hazard.
● Damaged high voltage components could be a hazard.
● Electrical systems designed to NOT energize water.
● Ground fault circuit interrupters also provide protection.
5-12
Submersion
● Follow standard shutdown procedures.
● If access is a problem, remove the vehicle from water and then shut down.
● Note: Microbubbling may occur. This is NOT a shock hazard, but a natural result of electrolysis.
5-13
VideoVehicle Fires
5-14
Vehicle Fires● Use NFPA compliant firefighting PPE and respiratory protection. ● Utilize standard equipment for extinguishing any vehicle fire.
● Do NOT use equipment to pierce hood, due to HV components and cabling near surface.
● Follow normal emergency shutdown procedures.
5-15
Vehicle Fires
● Copious amounts of water recommended for a P/HEV or EV fire.
● Electrical systems designed to not energize water (including fire streams).
● After extinguishment, determine any HV battery involvement. Use thermal imaging equipment if available.
5-16
Vehicle Fires: Battery Involvement● If burning internally,
allow battery to burn itself out (if situation allows).
● Battery enclosure will impede direct extinguishment.
● Constant cooling of the outside of battery can slow, and may prevent, fire spreading to adjacent cells.
5-17
Vehicle Fires: Battery Involvement
As always, protect bystanders from exposure.
● Each type produces different byproducts when burning.
● Byproducts can be harmful, and require full PPE and SCBA in accordance with NFPA standards.
5-18
Overhaul● Avoid all high voltage components.
● Relays in the HV battery could be damaged or welded in closed position.
● Always treat the high voltage components as hazardous.
5-19
Incidents Involving Charging Stations
Fires● Treat as any
energized electrical fire in a structure.
● Shut down power to charging station.
● Perform extinguishment operations.
5-20
Incidents Involving Charging StationsCollision
● If a vehicle is struck while at charging station, turn off charging station power before operations.
● Identify, Immobilize, Disable.
● Shut down charging station power source.
5-21
Real World Incidents
5-22
The following slides contain images and anecdotal information from a series of actual vehicle crash scenes involving hybrid and electric vehicles.
5-23
5-24
Photo by Kevin Cooney
5-25
Photos by Kevin Cooney
5-26
Photos by Kevin Cooney
Activity 5.1
Emergency Operations
5-27
You will be given three scenarios. Each is an emergency incident involving a P/HEV or EV.
Working in your assigned group, answer the following questions for each scenario.
1. What did you gather from a size-up? What hazards are present?
2. What actions should be taken to: Ensure a safe work environment? Mitigate and Control the Incident?
5-28
Scenario 1
5-29
1. What did you gather from a size-up? What hazards are present?
2. Using your size up and experience, what actions should be taken to:
- Ensure a safe work environment? - Mitigate and Control the Incident?
5-30
Scenario 2
5-31
5-32
1. What did you gather from a size-up? What hazards are present?
2. Using your size up and experience, what actions should
be taken to: - Ensure a safe work environment? - Mitigate and Control the Incident?
Scenario 3
5-33
5-34
1. What did you gather from a size-up? What hazards are present?
2. Using your size up and experience, what actions should be taken to: - Ensure a safe work environment? - Mitigate and Control the Incident?
Many response procedures for P/HEV and EV incidents are the same as for incidents involving conventional vehicles. Special response considerations for P/HEV and EV incidents include:
IdentificationShut Down and ImmobilizationAvoiding High Voltage ComponentsBattery InvolvementHigh Strength SteelCharging Station Hazards
5-35
Module V Summary