Water Tank Fill Hose Loss of Control

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Type:  Lessons Learned

Publisher:  Idaho National Laboratory, Idaho Falls, ID

Published As:  Public


Topics:  Operations, Construction/Project Management, Training and Qualification, Work Management/Planning, Hazardous Energy Control

On November 20, 2019 two construction subcontract employees working on the Administration Building at the Material Fuels Complex (MFC) were struck when a two-inch rubber/plastic vacuum hose connected to a fire hydrant split.

The hose was connected to a fire hydrant located outside the construction area in order to fill a mobile water tank located inside the construction area. After the hose was connected to the hydrant, an MFC operator opened the hydrant's discharge valve, turned over the monitoring of the discharge valve to a subcontractor employee and left the area.

As the filling evolution progressed, the hose split and began to spray the subcontract employee holding the hose. The employee was startled by the spraying water and dropped the hose. The pressure caused the hose to whip around striking the hand of the employee who was holding the hose and subsequently struck the other employee, who was monitoring the discharge valve, on the hard hat causing a minor bump on the head.

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