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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 136398.015 - Power Plant Worker Is Killed When Struck By Vessel Lid

Accident: 136398.015 -- Report ID: 0626000 -- Event Date: 06/18/2021
InspectionOpen DateSICEstablishment Name
1537166.01506/18/2021Calpine Operating Services Company, Inc.
At 6:30 p.m. on June 18, 2021, an employee was working for a firm that operated electric power generation facilities. He was working at a natural gas-fired powe r plant. He and a coworker were restoring a natural gas filter system at the pow er plant, by aligning valves after a maintenance crew had replaced filter media. This system separated liquids from the natural gas before the natural gas was b urned as fuel gas to heat water and produce steam for turbines. This was Filteri ng Unit A. It had been taken offline for the filter media replacement. It was a model number 95V-W12A-I-18-550-WP vertical dry gas scrubber, with tag number ONG 01FA. Once the filter change had been completed, there were two draw bolts that should have been tightened to 354 lb-ft (480 newton-meters) of torque. The worke rs were not aware of the manufacturer's torque requirements. They used crescent wrenches to tighten the bolts. They did not use a torque wrench or a pneumatic t ool. There were additional spacing tolerance requirements of which the workers w ere unaware. When they placed the natural gas coalescing filter vessel back into service, the vessel lid blew off. It struck the employee and knocked him off a scaffold. He suffered blunt force trauma, and he was killed.
Keywords: blunt force, blunt force trauma, e ptd, electrical, fall, flying object, inadequate maint, natural gas, pressure vessel, scaffold, struck by, training, traumatic
Employee # Inspection Age Sex Degree Nature
1 1537166.015 37 M Fatality

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