1. 1 Module 5 Damage Control

2. 2 Terminal Objectives Upon the successful completion of this module, participants will be able to describe methods used to prevent or control damage from a combustible dust explosion.

3. 3 Enabling Objectives Discuss types of damage control systems. Discuss emergency response planning.

4. 4 Damage Control Systems Monitoring/suppressing/eliminating dust Various types of systems –Spark ember detection –Extinguishing –Hazards separation/segregation –Deflagration venting –Pressure relief venting –Specialized fire suppression

5. 5 Spark Ember Detection Eliminate early causes of fires/explosions Detects spark/ember IR radiation Fire prevention method –Dust collectors –Pneumatic conveying systems

6. 6 Spark Ember Detection System activates countermeasures –Deluge valves –Abort gates –Alarm systems –Automatic machinery shutdown –Extinguishing devices

7. 7 Extinguishing System Releases fine mist of water Sparks/embers extinguished without interrupting production Greatly reduces –Personnel injury –Equipment damage –Downtime

8. 8 Hazard Separation Isolates combustible dust hazard Puts distance between dust and hazard Implement system during design/remodeling

9. 9 Hazard Segregation Used when separation is not possible Isolates hazard by using a barrier Implementation without burdening entire plant/building

10. 10 Deflagration Venting Controls damage caused by explosions Vents release expanding gases Gases reduce pressure below danger levels

11. 11 Pressure Relief Venting Same premise as deflagration venting Provides pressure relief to prevent explosions

12. 12 Specialized Fire Suppression Systems Sprinklers –Most standard form of fire suppression –Heat activated Carbon Dioxide –Will not damage electronic equipment –Reduces oxygen levels

13. 13 Dry Powder Extinguishers Standard/Multi-purpose –Safe for most kinds of fires “Knocks down” the flames Best for fires with flammable liquids/gases

14. 14 Deluge Foam System is connected to a water supply –Valve opened by smoke/heat detection system Used in high hazard areas –Chemical storage –Processing facilities

15. 15 Emergency Response Planning Requires detailed planning 3 phases of planning 1.Pre-explosion 2.Dust explosion 3.Post explosion

16. 16 Pre-Explosion Develop Emergency Action Plan (EAP) Take special consideration for combustible dust

17. 17 Dust Explosion Implement EAP Evacuate area NOT incipient fire –Explosions can be initiated by incipient fire –Ignited materials can travel

18. 18 Dust Explosion Incipient fire brigades –Limited training –Typically hose streams –PPE Categorized as fully involved fire –Fire department response –Specialized training

19. 19 Post-Explosion Initiate investigation when safe –Most evidence is destroyed –Only 50% of cases determine cause –Collect any dust samples Change in working environment –Paranoia, fear, and stress –Perceived risk –apprehension

20. 20 Post-Explosion Increased interest –Community –Regulatory industries Communication from organization –Public relations –Choosing a speaker

21. 21 Post-Explosion Resuming normal operations Recovery –Rebuilding with safety in mind –Strong leadership/direction needed

22. 22 Next Module Module 6: Facility Dust Assessment