LESSONS
LEARNED
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.

Contributing Factors

Damage and Injuries

Equipment

Probable Cause

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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.

H2 Lessons Learned

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Lessons Learned Corner

Intentional Hydrogen Release Causes Unintentional Hydrogen Alarm

Several best practices resulted from this incident and will be implemented if similar circumstances present themselves in the future.

  • Close bay door.
  • Keep within proximity of bay.
  • Be aware of other bays…

Key:

  • = No Ignition
  • = Explosion
  • = Fire
Hydrogen Incident Summaries by Equipment and Primary Cause/Issue
Equipment / CauseEquipment Design or SelectionComponent FailureOperational ErrorInstallation or MaintenanceInadequate Gas or Flame DetectionEmergency Shutdown ResponseOther or Unknown
Hydrogen Gas Metal Cylinder or Regulator 3/31/2012
4/30/1995
2/6/2013		4/26/201012/31/1969  3/17/1999
11/1/2001
12/23/2003
Piping/Valves4/4/2002
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		2/7/20091/24/1999
2/24/2006
6/8/1998
12/31/1969
2/7/2009		9/1/1992
10/31/1980		10/3/2008 
Tubing/Fittings/Hose 9/23/1999
8/2/2004
8/6/2008
9/19/2007		1/1/19829/30/2004
10/7/2005		 10/7/2005 
Compressor 10/5/2009
6/10/2007
8/21/2008
1/15/2019		  10/5/20098/21/2008 
Liquid Hydrogen Tank or Delivery Truck4/27/198912/19/2004
1/19/2009		8/6/200412/31/1969 1/1/197412/17/2004
Pressure Relief Device7/25/2013
5/4/2012		1/15/2002
1/08/2007		12/31/1969    
Instrument1/15/20193/17/1999
12/31/1969
2/6/2013		  11/13/73  
Hydrogen Generation Equipment7/27/1999  10/23/2001   
Vehicle or Lift Truck 7/21/2011    2/8/2011
12/9/2010
Fuel Dispenser 8/2/2004
5/1/2007
6/11/2007
9/19/2007		 2/24/2006
1/22/2009		   
Fuel Cell Stack      5/3/2004
12/9/2010
2/8/2011
Hydrogen Cooled Generator   12/31/1969
2/7/2009		   
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

This material was prepared as an account of work sponsored by an agency of the United States Government.
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