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Accident # | 156452 |
State Police # | 14-02393 |
Accident Date | 2014-06-01 |
Report Date | 2014-06-05 |
Follow-up Date | 2014-07-16 |
Follow-up: | Yes |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Benzene | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | YES | 1.7 pounds |
Ethane | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | YES | 36.7 pounds |
Hydrogen | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | NO | 66.8 pounds |
Isobutane | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | YES | 32.6 pounds |
Isopentane | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | YES | 23.8 pounds |
Methane | 23h 56m | charge pump, Hydrocracking Unit | YES | NO | YES | 70.1 pounds |
Nitrogen | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | NO | 2.0 pounds |
n-Butane | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | NO | 27.1 pounds |
Hexane | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | NO | 10.9 pounds |
n-Pentane | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | NO | 4.6 pounds |
Propylene | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | YES | 0.2 pounds |
Propane | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | YES | 46.7 pounds |
Volatile Organic Compounds (VOCs) | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | YES | 324.9 pounds |
Hydrogen Sulfide | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | NO | 1.7 pounds |
Carbon Monoxide | 23h 56m | charge pump, Hydrocracking Unit | NO | YES | NO | 702.6 pounds |
NOx | 23h 56m | charge pump, Hydrocracking Unit | NO | NO | YES | 129.1 pounds |
Particulate Matter | 23h 56m | charge pump, Hydrocracking Unit | NO | YES | NO | 24.3 pounds |
Sulfur Dioxide | 23h 56m | charge pump, Hydrocracking Unit | NO | YES | NO | 119.2 pounds |
Accident Classified As: Below Reportable Quantity (BRQ)
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).
Report states that the seal failure could not have been anticipated.
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.
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