Severity
Incident
Was Hydrogen Released?
Yes
Was There Ignition?
No
Incident Date
Describe the incident, including corrective steps taken and their result.
A fueler drove away without disconnecting the fueling hose from the vehicle. The breakaway did not open and the receptacle fitting sheared off the vehicle. Subsequent testing of the breakaway showed that the breakaway operated at 210 lbs, which was above the design value of 133 lbs. The hydrogen contained in the hose between the dispenser shutoff valve and the vehicle check valve was released.
Lessons Learned
- Consider periodic testing of breakaway device.
- Consider determining shear force limit of vehicle receptacle adapter fittings.