CHECK OUT OUR MOST RELEVANT INCIDENT LISTINGS!
Disclaimer: The Lessons Learned Database includes the incidents that were voluntarily submitted. The database is not a comprehensive source for all incidents that have occurred.
Do not interconnect hydrogen drain trap lines with other drain lines
Thoroughly inspect equipment installation to manufacturer’s installation instructions
Warn against unauthorized field modifications
Consult the…
Lessons Learned The site initiated the establishment of a field patrol and strengthened their onsite monitoring of mechanical equipment during a plant-wide temperature rise.
Quantitative control of tightening torque on bolts should be…
Normally hydrogen fires are not extinguished until the supply of hydrogen has been shut off due to the danger of re-ignition and explosion. During a gas leak/fire, it is important to shut off the source of the hydrogen if it is safe to do so. If…
All tank trailers should have a safely accessible auxiliary shut off valve in case of spills.
Emergency personnel need to have access to all of the appropriate protective clothing, including shoes. Liquid hydrogen is stored at 20.28 Kelvin…
First, it appears that the system may not have been vented properly. CGA G-5.5 should be used for determining safe locations based on the variables of the specific setup. Also, if the compressor was tied to a storage system, a backflow prevention…
Because of the near invisibility of a hydrogen flame in daylight and hydrogen's extremely low ignition coefficient, if a known leak is present (e.g., an audible hissing), ignition should always be presumed. The primary cause of this incident…
It is characteristic of silver/zinc batteries to outgas both hydrogen and oxygen for several hours after discharge. Also, in the future, the battery should be properly secured inside the container.
Installation
Fittings need to be visually inspected to insure ferules are in place and correctly positioned prior to swageing.
Research staff are responsible for communicating system specifications [gas type, Maximum Allowable…
After this accident, a safety inspection team was organized. An investigation of this incident and an inspection of all other experimental equipment was conducted by the team. As a result of this inspection, the heaters are now hard-wired to the…
Hazard analysis should consider potential leak locations, potential ignition sources in the vicinity, and the potential for accumulating flammable gases in that area.
Users should leak-check all cylinders upon installation. This event…
Key:
- = No Ignition
- = Explosion
- = Fire
Equipment / Cause | Equipment Design or Selection | Component Failure | Operational Error | Installation or Maintenance | Inadequate Gas or Flame Detection | Emergency Shutdown Response | Other or Unknown |
---|---|---|---|---|---|---|---|
Hydrogen Gas Metal Cylinder or Regulator | 3/31/2012 4/30/1995 2/6/2013 |
4/26/2010 | 12/31/1969 | 3/17/1999 11/1/2001 12/23/2003 |
|||
Piping/Valves | 4/4/2002 2/2/2008 5/11/1999 |
4/20/1987 11/4/1997 12/31/1969 8/19/1986 7/27/1991 12/19/2004 2/6/2008 10/3/2008 4/5/2006 5/1/2007 9/19/2007 10/31/1980 |
2/7/2009 | 1/24/1999 2/24/2006 6/8/1998 12/31/1969 2/7/2009 |
10/3/2008 | ||
Tubing/Fittings/Hose | 9/23/1999 8/2/2004 8/6/2008 9/19/2007 |
1/1/1982 | 9/30/2004 10/7/2005 |
10/7/2005 | |||
Compressor | 10/5/2009 6/10/2007 8/21/2008 1/15/2019 |
10/5/2009 | 8/21/2008 | ||||
Liquid Hydrogen Tank or Delivery Truck | 4/27/1989 | 12/19/2004 1/19/2009 |
8/6/2004 | 12/31/1969 | 1/1/1974 | 12/17/2004 | |
Pressure Relief Device | 7/25/2013 5/4/2012 |
1/15/2002 1/08/2007 |
12/31/1969 | ||||
Instrument | 1/15/2019 | 3/17/1999 12/31/1969 2/6/2013 |
11/13/73 | ||||
Hydrogen Generation Equipment | 7/27/1999 | 10/23/2001 | |||||
Vehicle or Lift Truck | 7/21/2011 | 2/8/2011 12/9/2010 |
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Fuel Dispenser | 8/2/2004 5/1/2007 6/11/2007 9/19/2007 |
2/24/2006 1/22/2009 |
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Fuel Cell Stack | |||||||
Hydrogen Cooled Generator | 12/31/1969 2/7/2009 |
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Other (floor drain, lab anaerobic chamber, heated glassware, test chamber, gaseous hydrogen composite cylinder, delivery truck) |
11/14/1994 7/21/2011 |
7/27/1999 6/28/2010 8/21/2008 |
12/31/1969 3/22/2018 |
6/10/2019 |
- = No Ignition
- = Explosion
- = Fire