West Fertilizer Explosion Source Energy and Structural Damage · 2018. 10. 23. · 2323 Determine...
Transcript of West Fertilizer Explosion Source Energy and Structural Damage · 2018. 10. 23. · 2323 Determine...
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West Fertilizer Explosion Source Energy and Structural Damage
Presented by
Ben Harrison, P.E.Technical Director
ABS Group
August 9, 2018
International Explosives Safety Symposium & Exposition
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Acknowledgements
• United States Chemical Safety and Hazard Investigation Board
– Donald Holmstrom, JD
Director, Retired
– Johnnie Banks, CFEI
Supervisory Investigator, Retired
• Victims of the West Fertilizer Explosion– Fatalities
• 12 First Responders
• 3 Members of the Public
– Injured
• Over 260
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Background
West
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Background
• April 17, 2013
– Fire reported at 7:29 pm
– Explosion involving bulk storage of ammonium nitrate at 7:51 pm
– 15 Deceased and over 260 injured
– Crater measured 90 ft in diameter
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Background
April 17, 20137:51 pm
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Background
Office / Chemical Storage
Production Building
Scale House
Corn SiloMisc. Grain Silos
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Background
Office / Chemical Storage
Production Building
Scale House
Corn SiloMisc. Grain Silos
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Background
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Investigation Goals
• Summary of the damage
• Source energy of the explosion that best explains the
observed damage
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West Fertilizer - Damage
Production Building - Crater
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Railway Damage at 100 ft. – K3.4
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West Fertilizer - Damage
Office / Chemical Storage Building at 85 ft. – K3
Scale House at 445 ft. – K15
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Apartment Complex at 450 ft. – K15
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Rest Haven Nursing Home at 650 ft. – K22
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Nursing Home Damage at 650 ft. – K22
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Nursing Home Crater Ejecta at 910 ft. – K30
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West Intermediate School at 700 ft. – K24
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West Intermediate School at 700 ft. – K24
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Residential Damage at 700 ft. – K24
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Residential Damage at 1,470 ft. – K50
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West High School at 1,500 ft. – K50
Practice Gym
Spectator Gym
AuditoriumEntry
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West High School at 1,500 ft. – K50
Spectator Gym
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Determine the Source Energy
• Damaged metal buildings
• Evaluate additional structures using ETL 1110-3-495
• Survey and evaluate drag loaded damage indicators
• Develop a possible range of charge weights
• Reconstruct West, TX in a 3D model to make final determination of the net explosive weight by evaluating– Residential damage
– Damage to the High School
– Damage of the Intermediate School
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Surveyed Metal Buildings
Approximate Crater Location
Damaged Metal Buildings
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Damage Assessments Utilizing ETL 1110-3-495
Potential Range of Charge Weights
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Range of Potential Charge Weights
• Preliminary Assessment Results
– Metal Building Assessment • Average Charge Weight of data
• 20,000 lbTNT
– Apartment Complex and Nursing Home • Range of potential Charge Weights
• 10,000 lbTNT to 40,000 lbTNT
• Detailed Assessment of Community Damage
– Residences
– High School
– Intermediate School
Evaluate Range of Explosion Energies20,000 lbTNT
to30,000 lbTNT
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Single Family Residence Damage
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Residential Damage from FACET3D & CFD
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Residential Damage from FACET3D & CFD
• Charge Weights Consistent with Residential Damage on Reagan
St.
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Construct 3-D CFD and FACET3D Model of West
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CFD Simulation – from West
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Full Report to the U.S. CSB
http://www.csb.gov/west-fertilizer-explosion-and-fire-/
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Full Report to the U.S. CSB Available Online
http://www.csb.gov/west-fertilizer-explosion-and-fire-/
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West Fertilizer Explosion Source Energy and Structural Damage
Presented by
Ben Harrison, P.E.Technical Director
ABS Group
August 9, 2018
International Explosives Safety Symposium & Exposition