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Shell Chemical East (26336), Norco

LDEQ Accident Report

Accident #155666
PDF AvailablePDF
State Police #14-01897
Accident Date2014-04-29
Report Date 2014-05-06
Follow-up Date 2014-06-24
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Carbon Monoxide33mMethyl Acetylene and Propadiene ConverterNOYESNOBRQ
Nitrogen Oxide33mMethyl Acetylene and Propadiene ConverterNOYESYESBRQ
Particulate Matter33mMethyl Acetylene and Propadiene ConverterNOYESNOBRQ
Volatile Organic Compounds (VOCs)33mMethyl Acetylene and Propadiene ConverterNONOYESBRQ
Propylene33mMethyl Acetylene and Propadiene ConverterNONOYESBRQ

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Maintenance/Procedures

On April 29, 2014 Shell Chemical's GO1 Unit flared off speciation propylene at the West Operations Ground Flare (WOGF) as a result of an unexpected loss of hydrogen to the Methyl Acetylene and Propadiene (MAP) Converter. The transmitter that controls the total feed flow to the MAP Converter and the instrument protective function transmitter closed during maintenance activities. This caused the valves controlling hydrogen flow to close and hydrogen flow to the MAP Converter suddenly stopped.

Discharge Preventable - No Information Given

Notes/Remedial Actions

No Information Given