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September 19, 2024

AI accident

"After a series of highly publicized operator errors at its Cleveland plant, a chemical manufacturer, installs a software based control system to prevent accidental releases of toxic substances. The system relies on a machine learning model trained on millions of hours of operating data from their facilities. Using sensor data from the plant, the model can identify when it is safe to open the plant’s exhaust vents. Thanks to its extensive “experience,” the model adapts seamlessly to process changes and physical modifications within the complex plant, which were blamed for confusing human operators in the past. The new
software system proves highly reliable and becomes a trusted tool within the company. Months later, a windstorm disrupts several of the plant’s sensors. Based on the flawed sensor input, the
control system continues to read “safe,” and the plant operators act accordingly, leaving the vents open, even as managers elsewhere in the plant begin an unscheduled production run in response to an urgent customer request. The run produces a cloud of lethal chlorine gas, which escapes through the open exhaust vents and drifts toward downtown."

 

Source: https://cset.georgetown.edu/publication/ai-accidents-an-emerging-threat/

September 12, 2024

H2S is both flammable and toxic!

At 6:45 p.m. on October 28, 2021, an employee was circulating a tank of hydrogen sulfide when a burner box, which was 15 feet away, was turned on and the hydrogen sulfide that was in the atmosphere ignited. The employee was hospitalized to treat second and third-degree burns to his hands and face. 

Source: OSHA.gov

September 8, 2024

Employee killed, another injured in storage tank explosion

 "On or about January 28, 1993, Employee #1, a contract welder, was repairing and replacing flanges on storage tanks in order to install a closed ventilation system. The storage tanks contained sodium sulfide, which reacts with acid to generate hydrogen sulfide gas. This highly flammable gas accumulated in a vapor space. Prior to the accident, a tank flashed while being cut or welded into by the employee. When a lighted torch was brought in proximity, the tank ruptured. Employee #1 died. Employee #2 had gone up on a tank to tell Employee #1 not to cut into the tank when the tank exploded. Employee #2 was hospitalized."

Source: OSHA.gov

September 3, 2024

Employee Sustains Kidney Rupture And Multiple Fractures when H2S released from a safety valve

"At 10:30 a.m. on September 30, 2019, an employee was performing maintenance on a storage tank battery for oil and gas operations support. The employee was on a crew which was working on a line which was not pressurizing properly. As the employee was working on the line, the pop off valve relieved causing the employee to be struck by released hydrogen sulfide. The employee fell off the tank, rupturing his kidney and fracturing his left fibula and right hip. The employee was hospitalized".

Source: OSHA.gov