United States Department of Transportation
i
Hazardous material releases due to unsecured openings and lining failures, volume 1.
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1990-12-01
[PDF-2.09 MB]
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Abstract:In response to the large number of unintentional releases of hazardous
materials from railroad tank cars for which accidents were not the cause, the
Federal Railroad Administration (FRA) initiated this study to (1) recommend
procedures to ensure that tank car appurtenances are properly maintained and
secured, (2) develop and recommend cost effective procedures for monitoring and
controlling tank car corrosion, and (3) investigate the issue of 'excess flow valves
on propane cars not operating properly when the valve above it is sheared off.
Leaks due to frangible disk failure were not included in the scope of this study.
The study included review of all relevant literature, analysis of FRA
Hazardous Material Inspector's reports, analysis of the Hazardous Materials
Information System (HMIS) database maintained by the Research and Special
Programs Administration (RSPA), and visits to tank car loading/unloading
facilities and repair facilities. In addition, the University of New Brunswick
conducted tests of Emergency Shut-off Valve (ESV) equipped propane cars.
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