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123 HazMat Chapter 5

Identifying Containers and Predicting Behavior

QuestionAnswer
What to consider to identify endangered area(s) (4) size, shape, exposures, physical/health/safety hazards
GEBMO acronym? General Emergency Behavior Model
GEBMO purpose allows responders to predict a general pattern of how the hazardous material and container are most likely to behave, based off historical situations involving the same or similar variables
3 elements of hazmat incidents material(s), container, exposure
the common 6 step sequence of the three elements stress, breach, release, dispersion/engulf, exposure/contact, harm
Causes of stress, thermal, chemical, and mechanical energy
thermal energy
chemical energy
mechanical energy
Breach when container is stressed beyond its limits of recovery
5 Types of Breach disintegration, runaway cracking, attachments (closures) open or break, punctures, splits/tears
Release when the contents, energy, and the container itself is released
Classifications of Releases (4) Detonation (hundredth/thousandth of a second), Violent Rupture (1 second or less), Rapid Relief (safety devices several seconds to several mins), Spill/Leak (mins to days)
Engulfment the dispersion of material forms a danger zone
3 dispersion/engulfment patterns Hemispheric, cloud, plume, cone, stream, pool, irregular
Hemispheric release semicircular or dome-shaped, caused by detonation, deflagration, and violent rupture, partially in contact with ground/water
Cloud release Ball-shaped, collectively rises above ground/water
Plume release irregularly shaped pattern, (wind and topography influencing a Cloud)
3 computer software to estimate endangered areas CAMEO, ALOHA, HPAC Computer-Aided Management of Emergency Operations, Area Locations of Hazardous Atmospheres, Hazard Predication and Assessment Capability
Exposure/Contact time frames (4) immediate (detonation), short-term (mins- hours gas or vapor cloud), medium-term (days, weeks, months - lingering pesticides), long-term (years, generations (permanent radioactive source)
Harm (the 3 mechanisms) energy release, corrosivity, toxicity
Created by: jon.kowalski
 

 



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