PHMSA Report 20190068 - TEXAS EASTERN TRANSMISSION, LP (SPECTRA ENERGY PARTNERS, LP) — Gas transmission and gathering — incident on 2019-05-08 | Regulus

Gas transmission and gathering incident in DANVILLE, LINCOLN County, KY. Reported cause: INCORRECT OPERATION. Reported consequences: 0 fatalities, 0 injuries, 19350 NATURAL GAS released, $0 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20190068.

Operator ID: 19235.

Reported incident date: 5/8/2019 20:02.

Location detail: 427.273

Cause detail: VALVE LEFT OR PLACED IN WRONG POSITION, BUT NOT RESULTING IN AN OVERPRESSURE

Cause detail: ORIGINAL REPORT: 48 HR NRC REPORT 1245382 AT APPROXIMATELY 8:02 PM EDT ON MAY 8, 2019, A NATURAL GAS RELEASE FROM THE EMERGENCY SHUTDOWN (ESD) SYSTEM OCCURRED AT THE DANVILLE COMPRESSOR STATION ON THE TEXAS EASTERN TRANSMISSION (TETLP) IN LINCOLN COUNTY, KENTUCKY. TETLP PERSONNEL ARRIVED ON SITE AT APPROXIMATELY 8:35 PM EDT AND DETERMINED THAT A VALVE (LINE 10 ESD ISOLATION VALVE) DID NOT CLOSE PROPERLY CAUSING THE GAS RELEASE AFTER THE ESD SYSTEM WAS ACTIVATED. THE TETLP PERSONNEL SUBSEQUENTLY ISOLATED THE ESD SYSTEM AT APPROXIMATELY 8:43 PM EDT, STOPPING THE GAS RELEASE. THE STATION WAS RETURNED TO NORMAL OPERATIONS ON MAY 10, 2019. THE APPARENT CAUSE IS STILL UNDER INVESTIGATION. SUPPLEMENTAL REPORT: TETLP HAS COMPLETED ITS INVESTIGATION OF THE MAY 8, 2019 ESD EVENT AT DANVILLE COMPRESSOR STATION. THE EMERGENCY SHUTDOWN (ESD) SYSTEM ACTIVATION WAS CAUSED BY A TRIP IN THE BREAKER SUPPLYING ELECTRICITY TO THE ESD PANEL RESULTING FROM A SHORT IN THE WIRING THAT RUNS FROM THE ESD PANEL TO AN ESD PULL-BUTTON. THE ESD SYSTEM ACTIVATED, BUT ONE OF THE ESD BLOCK VALVES, VALVE# 10-296, DID NOT CLOSE AS INTENDED. THE BLOCK VALVE HAD BEEN DEACTIVATED DURING THE ROUTINE TESTING AND INSPECTION OF THE ESD AS REQUIRED BY COMPANY PROCEDURES, HOWEVER, THE BLOCK VALVE WAS NOT REACTIVATED AFTER THE ROUTINE TESTING AND INSPECTION HAD BEEN COMPLETED.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: INCORRECT OPERATION — INCORRECT VALVE POSITION.

PHMSA indexed costs: $54,094 reported total cost, $54,377.128 in 1984 dollars, $68,502.621 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.