Breakaway Separation During Fueling

First Name
Andy
Last Name
Piatt

During a 70-MPa fueling, the fueling hose breakaway separated. The separation occurred without any extraneous forces other than the pressure of the gas internal to the fueling hose. Upon investigation, it was determined the pull force set point was incorrectly adjusted. No further issues or actions.

Hose Pressure Rating Verification Error

First Name
Andy
Last Name
Piatt

Several parties were involved in hydrogen quality sampling when it was discovered that a hose which was being used in the collection process, connecting two sampling components, was not rated for the pressure to which it was being subjected. Upon discovery, the process was stopped, the hose was removed, and an alternate configuration of the equipment was implemented before carrying on the sampling.

Liquid Hydrogen Tank Boiling Liquid Expanding Vapor Explosion (BLEVE) due to Water-Plugged Vent Stack

First Name
Andy
Last Name
Piatt

A rupture disc blew on a 20,000-gallon liquid hydrogen tank, causing the vent stack to exhaust cold gaseous hydrogen. Emergency responders were called to the scene. To stabilize the tank, the remaining hydrogen was removed from the tank except for a small volume in the heel of the tank that could not be removed manually. The tank vacuum was lost. Firemen sprayed the tank with water and directed a stream onto the fire exiting the vent stack.

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