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Emergency Shutdown Systems for Chlorine Transfer
FINAL REPORT: Safety Bulletin
Accident Occurred On: 08/14/2002
Final Report Released On: 06/14/2007
Accident Type: Release

statistics

Total # of Recommendations
1
Total # of Open Recommendations
1
Total # of Closed Recommendations
0
Total % of Open 100 vs. Closed 0

investigation information

Image
Accident Description
This bulletin compares two chlorine releases investigated by the CSB. In both, a railcar unloading hose failed and chlorine was released. In the first incident, an emergency shutdown system malfunctioned, resulting in a release of 48,000 pounds of chlorine and a significant community impact. In the second, the emergency shutdown system worked to minimize the release, and the community was not impacted.
Investigation Status
The CSB issued this safety bulletin on June 14, 2007.


 

Recommendations

U.S. Department of Transportation (DOT)
2005-06-I-LA-1

Expand the scope of DOT regulatory coverage to include chlorine railcar unloading operations. Ensure the regulations specifically require remotely operated emergency isolation devices that will quickly isolate a leak in any of the flexible hoses (or piping components) used to unload a chlorine railcar. The shutdown system must be capable of stopping a chlorine release from both the railcar and the facility chlorine receiving equipment. Require the emergency isolation system be periodically maintained and operationally tested to ensure it will function in the event of an unloading system chlorine leak.

Status: Open - Acceptable Response or Alternate Response
Open - Acceptable Response or Alternate Response (O - ARAR) - Response from recipient indicates a planned action that would satisfy the objective of the recommendation when implemented.
 

 
 

Related News

CSB follow-up letter to DOT regarding emergency shutdown systems for chlorine railcars
12/2/2013
CSB releases follow-up letter to DOT regarding emergency shutdown systems for chlorine rail-cars
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DPC
CSB Issues Safety Bulletin on Dangers of a Major Chlorine Release During Railcar Unloading; Agency Calls on U.S. Department of Transportation to Expand Regulatory Coverage to Require Emergency Shutdown Systems
6/14/2007
Washington, DC, June 14, 2007 - The U.S. Chemical Safety Board (CSB) today released a safety bulletin warning that some chlorine railcar transfer systems lack effective detection and emergency shutdown devices, leaving the public vulnerable to potential large-scale toxic releases.
read more
 
 
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