ENABLE GAS TRANSMISSION, LLC — Gas transmission and gathering — incident on 2018-01-22

Gas transmission and gathering incident in PERLA, HOT SPRING County, AR. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 4047 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: 20180028.

Operator ID: 602.

Reported incident date: 1/22/2018 1:00.

Location detail: PERLA

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: DURING THE EARLY MORNING OF 1/22/18, A BOURDON TUBE BROKE IN A BARTON CONTROLLER CAUSING A 4 INCH REGULATOR TO FAIL CLOSE AND ANOTHER 4 INCH TO FAIL OPEN. THIS CAUSED A RELIEF VALVE TO RELIEVE. SYSTEM CONTROL NOTIFIED THE LOCAL OPERATIONS GROUP OF THE ISSUE. TWO O&M TECHNICIANS WERE DISPATCHED AND ARRIVED ON SITE AT 01:45. THE O&M TECHNICIANS INSTALLED GAUGES AND DISCOVERED THE PROBLEM. THEY ISOLATED THE FAILED OPEN REGULATOR (WHICH HAD THE FAILED CONTROLLER) AND THE FAILED SHUT REGULATOR CAME BACK INTO SERVICE. THE FAILED CONTROLLER WAS REPAIRED. PLANS HAVE BEEN MADE ARE TO REPLACE THE ENTIRE CONTROLLER WITH A BECKER PILOT CONTROLLER. GAS LOSS WAS CALCULATED TO BE 4,047 MCF. THE NRC WAS NOTIFIED ON 1/22/18 AT 11:37 (NRC#1202539). A FOLLOW UP CALL WAS PROVIDED TO THE NRC ON 1/24/18 AT 07:37 (NRC#1202699).

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $12,050 reported total cost, $11,047.111 in 1984 dollars, $13,829.617 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.