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Shell Chemical East (26336), Norco

Releases of Hydrogen

LDEQ Accident Number
Accident Date
Point Source(s) Notes Amount of Release

OL-5 Elevated Flare (EPN 6-84)
Cause: Shell Chemical's OL-5 Unit's Converter and Product Hydrogen Methanators shutdown due to a high level in the crude hydrogen drum. This led to flaring of unmethanated hydrogen at the OL-5 Elevated Flare (EPN 6-84).

Followup: No

Notes: The crude hydrogen level was lowered. The methantators were safely returned to normal conditions and flaring was stopped. Initial report states there was offsite impact.

level control valve in the de-methanizer system
level control valve
Cause: On November 24, 2013, Shell Chemical's OL-5 operations discovered a packing leak on a level control valve in the de-methanizer system of the OL-5 Process Unit.

Followup: No

Notes: Operations took immediate action to mitigate the leak and have repairs made to the valve.