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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 201061843 - Employee Burned By Vapor

Accident: 201061843 -- Report ID: 0950632 -- Event Date: 11/03/1998
InspectionOpen DateSICEstablishment Name
12600586711/13/19983621Ogden Sigc Geothermal Inc
On November 3, 1998, Employee #1 was working as part of a three-worker crew conducting boroscope readings inside a tube heat exchanger at a geothermal energy plant. The boroscope utilized a high-temperature halogen light source and was plugged into a 120-volt extension cord. A second work crew removed a valve from a vessel containing isopentane vapor, approximately 8 feet away from the boroscope. In approximately 7 seconds, the vapor cloud released from the vessel was ignited by either the boroscope, extension cord, or other related equipment. Employee #1, who was reading the meter for the boroscope in a slightly sunken area of the ground surface, was caught in the vapor cloud and burned. Written procedures of the geothermal energy plant, which required a hot work permit for any electrically-operated equipment, were not followed. Also, none of the workers involved in the incident were wearing fire-protective clothing. Employee #1 was hospitalized, suffering from second- and third-degree burns on both of his arms.
Keywords: burn, vapor, chemical vessel, test equipment, explosion, lighting, valve, arm, high temperature
Employee # Inspection Age Sex Degree Nature Occupation
1 126005867 Hospitalized injury Burn/Scald(Heat) Chemical technicians

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