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.
During charging, most batteries will offgas hydrogen, making adequate ventilation and the elimination of ignition sources critical attributes of the charging area. Data from the battery manufacturer should be consulted to determine appropriate…
Process changes have been implemented for development and review of safety basis documents that focus on a collaborative effort between the preparer and reviewers in order to provide a more in-depth review. This change is anticipated to provide…
1. Combustible gas detectors calibrated for hydrogen can falsely report hydrogen alarms due the presence of other gases the detector may pick up, such as carbon monoxide from engine exhaust or other sources. Since this event occurred, two…
Personnel were focused on the AGES system test and results, not the compatibility of the test equipment. The manual valve was needed to successfully test the system, however the fact that this particular valve could not accommodate the full…
An important aspect of the reliability of a valve is the condition of the stem seal which tends to deteriorate with time and wear. Valves used in hydrogen service should be packed with the correct valve packing material and periodically checked…
In addition to the probable causes listed above, the lack of a standard operating procedure for hydrogen leak detection was one of the probable causes of this incident. Additional contributing factors included the following:
- Severe pipe…
The company investigation revealed that the incident arose because insufficient water was added to the batch. This resulted in a rapid increase in temperature and evolution of hydrogen gas following the addition of aluminum powder in the last…
The incident was the result of a combination of factors leading to exceptional temperature conditions that were not taken into account in the mechanical design of the reactor. Corrective actions that were implemented by the plant management…
The following actions were proposed as a result of this incident:
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…
Maintain an internal process for verifying component wetted material compatibility for intended use as part of the procurement process for hydrogen system equipment.
Don’t rely solely on a manufacturer to provide appropriately rated…
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