TENNESSEE GAS PIPELINE COMPANY

Incident Narrative

ALL TIMES ARE CENTRAL STANDARD TIME; PIR = 633 FEET; KM TGP PIR WITH BUFFER = 673 FEET; 48-HOUR NRC UPDATE MADE EARLY DURING NORMAL BUSINESS HOURS, NRC # 1201018, 01/03/2018, 14:28 CST; GAS RELEASE REPORTED TO LA STATE POLICE 01/02/2018; REPORT NUMBER 18-00012; 01/02/18, STATION 834 IS ON LINE, OPERATING PERSONNEL IS ON SITE; WEATHER CONDITION IS UNUSUAL SEVERE COLD WEATHER; 15 DEGREES FAHRENHEIT; 01/02/2018, 00:01 HOUR, VALVE UNINTENTIONALLY BEGAN TO OPEN, RELEASING NATURAL GAS TO ATMOSPHERE; OPERATING PERSONNEL IMMEDIATELY HEARD THE SOUND OF VENTING NATURAL GAS AND INVESTIGATED SOURCE OF BLOWING GAS; OPERATING PERSONNEL THEN INITIATED A STATION SHUT DOWN; A SIDE VALVE UNINTENTIONALLY DID NOT CLOSE ALLOWING NATURAL GAS TO CONTINUE TO FEED OPEN VALVE; A RESIDENT HEARD THE SAME AND CALLED 911 (FARM HOUSES IN THE AREA); SHERIFF DEPARTMENT CALLED TGP GAS CONTROL; 00:57 HOUR, ANOTHER BLOCK VALVE WAS REMOTELY CLOSED BY EMPLOYEES THUS TERMINATING THE RELEASE OF NATURAL GAS TO ATMOSPHERE; INVESTIGATION AND REPAIR COMMENCED; MOISTURE CREATED ICE IN THE CONTROL BOX OF THE VALVE; SAID ICE CAUSED INCORRECT OPERATION OF THE CONTROLS THUS OPENING THE VALVE UNINTENTIONALLY; THE CONTROLS WERE CLEANED AND LUBRICATED AND THE CONTROL BOX WAS REINSTALLED; CONTROLS OF THE SIDE VALVE WERE FREED FROM ICE IN THE WORM GEAR HOUSING AND THE ACTUATOR WAS LUBRICATED AND RETURNED TO SERVICE MODE; 01/04/2018, 18:20 HOURS, STATION 834 RETURNED TO ON LINE STATUS;