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Alon Refining (3116), Krotz Springs

Causal Factor: Instrument Failure

LDEQ Accident Number
Accident Date		 Point Source(s) Notes Amount of Release
141825

2012-08-05		Complex I
Cause: Operators received an alarm that the Complex I flare SO2 had exceeded 500lbs in 24 hours. The technician concluded that the flow meter had malfunctioned. The instrument vendor assessed that debris had probably entered the probe(s) and affected ultrasonic capabilities.

Followup: No

Notes: The technician was instructed to remove and clean the transducer probes. Upon re-installation, flow was back to normal.		Sulfur Dioxide: 174.0 pounds
159509

2014-10-18		Boiler B-8203
Cause: B-8203 boiler tripped due to an instrument malfunction followed by a B-8204 boiler trip due to low boiler feed water. Loss of boiler steam caused the FCCU to trip, resulting in excess emissions from the Fluid Catalytic Cracking Unit (FCCU) stack and Complex 2 flare.

Followup: No

Notes: FCCU and all adjoining units in Complex 2 were shutdown along with the LRU, MSAT and Isom at Complex 1. System cleared and emissions stopped. Boilers repaired then units brought back on line per startup procedures.		Sulfur Dioxide: 1,469.0 pounds