SOUTHERN STAR CENTRAL GAS PIPELINE, INC

Incident Narrative

ON 1/27/2022 AS 12:51 AM CST, SOUTHERN STAR CENTRAL GAS PIPELINE (SSCGP) LEADER, FIELD OPERATIONS WAS NOTIFIED BY A SSCGP FIELD EMPLOYEE THAT GAS WAS VENTING AT THE MONTEZUMA COMPRESSOR STATION. THE LEADER CONTACTED GAS CONTROL (GC) AT 12:53 AM AND GC CONFIRMED THE STATION HAD AN ESD IN PROGRESS. LEADER WAS INFORMED LOCAL POLICE WERE ON SITE AND SPOKE WITH THEM AT 1:10 AM. LOCAL POLICE CLOSED ROAD 12 AND REQUESTED THE RESIDENCE AT THE CORNER OF ROAD 12/GERONIMO ROAD TO VOLUNTARILY EVACUATE. SSCGP PERSONNEL ARRIVED ON SITE AT 1:15 AM TO BEGIN INSPECTION. BLOW-OFF VALVE WAS CLOSED AT 1:24 AM TO STOP GAS FROM VENTING. GC NOTIFIED THE NRC AT 1:23 AM (#1327393) BASED ON THE ESTIMATED RATE OF GAS LOSS. AT 2:10 AM, THE LOCAL POLICE WERE NOTIFIED TO GIVE THE ALL CLEAR AND THAT SSCGP PERSONNEL WOULD REMAIN ON SITE TO MONITOR. THE STATION WAS PLACED BACK IN SERVICE ON 1/27/2022 AT 11:00 AM. THE STATION WAS INSPECTED FOR THE CAUSE OF THE ESD AND THE CAUSE OF THE ISOLATION VALVE CLOSURE FAILURE. THE ESD WAS TRIGGERED BY AN OIL LEAK ON ENGINE 3, THIS OIL LINE FITTING WAS REPLACED ON THE MORNING OF 1/28/2022. THE ACTUATOR AND CONTROL CYLINDER WERE INSPECTED, ICE AND DEBRIS REMOVED, O-RINGS AND HYDRAULIC FLUID WERE REPLACED ON 1/28/2022. THE STATION ESD WAS TESTED ON 1/28/2022 AFTER ALL REPAIRS WERE COMPLETED AND ALL VALVES ACTUATED PROPERLY.