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Motiva Enterprises (1406), Norco

Releases of Nitrogen

LDEQ Accident Number
Accident Date		 Point Source(s) Notes Amount of Release
130903

2011-04-28		Flare: EPN 3-84
Cause: A leak occurred at HIC-84, along the downstream block valves, allowing nitrogen to enter the column causing a rapid pressure increase. The distilling unit upper crude column became overpressured, and PCV-195 opened the flare to relieve pressure in the column. EPN 3-84 Flare at Shell was used because the Motiva flare was upset and the pilot light was out. Original upset occurred at Motiva DU-5 Crude Unit with a notrogen leak into the Upper Crude Column.

Followup: No

Notes: The Shell report for the motiva release was dated May 5th, 2010 instead of 2011.
156452

2014-06-01		charge pump, Hydrocracking Unit
Cause: Motiva's Hydrocracking Unit (HCU) flared process gas at the HCU Elevated Flare (FE 301) due to the partial shutdown of the HCU. A seal leak was discovered on the charge pump on the second stage of the HCU. Due to the location of the leak, the unit had to partially shut down to complete repairs. Flaring of hydrogen will continue intermittently to stabilize the remaining operating equipment. Flaring ceased once the charge pump was repaired and the unit returned to stable operating conditions. Flaring occurred on June 1 (367 minutes) and June 7 (1069 minutes).

Followup: Yes

Notes: After the unit was shut down and secured, maintenance and engineering investigated and identified that a seal failure occurred. A repair plan was promptly developed and executed. Due to this incident being a repeat issue in a short period of time, Motiva chartered a full investigation. Findings from this investigation resulted in the installation of additional check valves to control pressure swings and to help manage the integrity of pump seals.		2.0 pounds