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Accident # | 158624 |
State Police # | 14-40747 |
Accident Date | 2014-09-10 |
Report Date | 2014-09-17 |
Follow-up Date | 0000-00-00 |
Follow-up: | No |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Propylene | 30m | OL5 Elevated Flare | NO | NO | YES | BRQ |
Accident Classified As: No Information Given
The OL5 Unit at Shell Chemical flared propylene at the OL5 Ground and Elevated Flares. Flaring occurred as a result of the overfilling of the propylene refrigerant compressor (PRC) accumulator. The overfilling of the PRC accumulator caused the downstream piping that is routed to the primary demethanizer column reboiler to fill with liquid propylene. Normally, vapor propylene is routed to the primary demethanizer column reboiler from the PRC accumulator to heat the demethanizer column. Contrarily, the overfilling of this line with liquid propylene caused the primary demethanizer column reboiler to operate improperly and affect the primary demthanizer operation.
To mitigate this abnormal situation, Operations personnel flared the excess propylene to the propylene refrigerant compressor (PRC) accumulator. Report states that an investigation is ongoing. No information given about remedial actions taken or pollutant amounts released.
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