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Alon Refining (3116), Krotz Springs

Causal Factor: Process Upset

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

FCC Flare 5-85
Cause: Incident occurred when a line plugged causing the pressure relief system to divert ATS acid gas to the FCC Flare.


Notes: Full RCA to be completed by 3/7/09
Sulfur Dioxide: 11,067.0 pounds

None Reported
Cause: Alon Refinery notified SPOC of a planned start up the facility scheduled for 6/2/11 as a precautionary measure due to the potential to exceed reportable quantities into the air during start up.

Followup: No

Notes: The letter confirms that no reportable quantity air releases associated with the start up occurred, and notification was for courtesy purposes only. No information as to what was released, if anything, or quantities of anything that may have been released.

FCCU regenerator stack
Cause: A leak in a slurry pump caused a flash fire and triggered the shutdown of the FCCU and associated units. Safety reliefs vented to the FCC Unit flare.

Followup: No

Notes: The flash fire was extinguished. Safety devices functioned until units were fully down.
Sulfur Dioxide: 797.0 pounds
Hexane: 319.5 pounds
Carbon Monoxide: 2,463.6 pounds
Nitrogen Oxide: 452.8 pounds
Volatile Organic Compounds (VOCs): 5,144.0 pounds
Hydrogen Sulfide: 31.6 pounds
Particulate Matter: 30.1 pounds
Ethylene: 277.3 pounds
Propylene: 1,178.6 pounds

FCCU Flare
Cause: Hydrocarbon carryover from the Amine Unit to the Ammonium Thiosulfate Unit (ATS) cause the ATS incinerators to reach an unsafe operational temperature. Therefore, to stabilize the ATS incinerators and downstream equipment, the Amine Reflux drum was drained to the flare causing an increase in Sulfur Dioxide emissions from the flare.

Followup: No

Notes: Once the ATS unit was stable, the Amine Reflux drum drain was closed to the flare.
Sulfur Dioxide: 1,012.0 pounds