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Accident # | 84681 |
State Police # | 05-09041 |
Accident Date | 2005-12-19 |
Report Date | 2005-12-27 |
Follow-up Date | 0000-00-00 |
Follow-up: | No |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Nitric Oxide | 4h 44m | Hydrocracker (HCU) Second Stage Make-up Hydrogen Compressor (K-2302) | NO | YES | NO | 79.0 pounds |
Accident Classified As: Reportable Quantity
Operation personnel determined that the Hydrocracker (HCU) Second Stage Make-up Hydrogen Compressor (K2302) alignment and unit conditions were causing a pressure safety valve (PSV) to relieve refinery grid hydrogen to the flare.
Discharge not preventable. This release was caused by an unanticipated operational consequence and s not considered to be preventable at this time.
A notification was made regarding a release of Nitric Oxide (NO) on 12/19/2005. At approximately 1758 hours on 12/19/05, excess flare volume was identified and a search of process units was initiated to locate the source. At approximately 2224 hours the source of the flaring was identified and isolated. Upon identification of the flaring source emissions calculations were completed and agency notifications made. A search located the source of excess flare gas. The situations which caused the PSV to relieve the flare were modified, ending the incident. Normal procedures for HCU startup will be reviewed in order to evaluate line-ups that could result in flaring and modify them if appropriate.
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