Describe the incident, including corrective steps taken and their result.
Incident Synopsis
At an offsite liquid H2 fill station, a liquid hydrogen trailer hit a gaseous H2 purge shut off valve handle. Tubing attached to the purge valve was bent on both ends but did not leak.
Cause
The driver was not sufficiently careful in approaching the liquid H2 system fill point.
Lessons Learned
- A SOP should be developed which prohibits drivers from backing into the fill position.
- As a precautionary measure to mitigate similar events in the future, piping barriers should be installed which protect critical H2 piping components/systems from delivery truck collisions.