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Motiva Enterprises (2719), Convent

Releases of Particulate Matter 10

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

HTU-2 Fire and Release from recycle Compressor
Cause: At approximately 10:25 am on 10/29/05, there was a small fire on 14C-201 recycle compressor on HTU-2. A small fire was ignited by lube oil escaping the seals on the turbine outboard bearing cap onto the turbine case which was in full operation during the leak. It appears that the lube oil reservoir overfilled which impeded flow through the lube oil return line back to the reservoir.

Followup: No

Notes: The fire was immediately extinguished by operations using a fixed fire monitor. Due to the fire the hydrogen system on the unit had to be depressured to the flare resulting in flaring for several minutes. The unit was depressured for repair. Incident is under investigation using Triangle of Prevention program. Mitigations are likely to be a combination of engineering, i.e. different technology for measuring levels and revising procedure No reportable quantities were exceeded.
1.1 pounds

Pump 14P-305
Cause: At approximately 7:35 pm smoke was observed coming from the HTU-2 area. Unit operations personnel subsequently discovered a fire on pump 14P-305 originating from the pump's outboard seal.

Followup: No

Notes: The event was localized in the refinery. Pump was isolated from associated process units so as not to affect unit operations. No reportable quantities were exceeded.
0.2 pounds

flare #2
Cause: piece of instrument air tubing failed causing a bypass control valve around a steam generator to close. Flow through the intermediate cycle gas oil circuit stopped, causing de-ethanizer tower to slump, increasing concentration of light material in the de-butanizer tower feed, increased pressure, causing flaring event

Followup: No

Notes: "unit charge rate and riser temperature were reduced immediately following the loss of heat medium into the de-ethanizer reboiler to minimize the loading to the debutanizer tower. The bypass around 2PDC-142 was opened to re-establish flow to the de-ethanizer reboiler."
11.4 pounds

flare no. 2 and wet gas scrubber
Cause: Regenerated Catalyst Slide Valve (RCSV) of the Fluid Catalytic Cracking Unit (FCCU) changed position without a corresponding command from the control system causing trip of the gas turbine driving the Wet Gas Compressor because of high exhaust temperature--overpressure control valve opened to flare. Exceeded RQ's.

Followup: Yes

Notes: "Took immediate action to begin the process of stabilizing, slowing down, and diverting feed from the FCCU riser." Circuit board replaced, cleaned the servo and will replace it when spare arrives.
37.0 pounds