{"operation":"document","citation":"P-82-033","title":"NTSB Safety Recommendation P-82-033","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1982-09-08","effective_on":"1982-09-08","summary":"THE NTSB RECOMMENDS THAT THE MISSOURI POWER AND LIGHT COMPANY: CONDUCT AN INSPECTION OF ALL OF ITS DISTRICT REGULATOR STATIONS SYSTEMWIDE TO DETERMINE IF ALL RELIEF VALVES AND CONTROL SENSING LINE VALVES ARE IN THEIR CORRECT POSITIONS AND IF THE REGULATOR STATION CONTROL LINES ARE ADEQUATELY PROTECTED AGAINST EXCAVATION DAMAGE AND TAKE CORRECTIVE ACTION AS NECESSARY.","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-82-033.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-82-033.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-82-033","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-82-033","body":"NTSB safety recommendation P-82-033.\n\nTHE NTSB RECOMMENDS THAT THE MISSOURI POWER AND LIGHT COMPANY: CONDUCT AN INSPECTION OF ALL OF ITS DISTRICT REGULATOR STATIONS SYSTEMWIDE TO DETERMINE IF ALL RELIEF VALVES AND CONTROL SENSING LINE VALVES ARE IN THEIR CORRECT POSITIONS AND IF THE REGULATOR STATION CONTROL LINES ARE ADEQUATELY PROTECTED AGAINST EXCAVATION DAMAGE AND TAKE CORRECTIVE ACTION AS NECESSARY.\n\nPriority: CLASS II\n\nOverall Status: Closed - Acceptable Action\n\nIssued Date: 1982-09-08\n\nAdopted Date: 1982-08-24\n\nOverall Date Closed: 1983-02-16\n\nSynopsis: ON JANUARY 28, 1982, AT CENTRALIA, MISSOURI, NATURAL GAS AT 47 PSIG ENTERED A LOW PRESSURE DISTRIBUTION SYSTEM WHICH NORMALLY OPERATED AT 11 INCHES WATER COLUMN (0.40 PSIG) AFTER A BACKHOE BUCKET SNAGGED, RUPTURED, AND SEPARATED THE 3/4-INCH-DIAMETER STEEL PRESSURE REGULATOR CONTROL LINE AT THE MISSOURI POWER AND LIGHT COMPANY'S DISTRICT REGULATOR STATION NO. 1. THE BACKHOE, WHICH WAS OWNED AND OPERATED BY THE CITY OF CENTRALIA, WAS BEING USED TO CLEAN A DITCH LOCATED ADJACENT TO THE PRESSURE REGULATOR STATION. THE HIGH PRESSURE GAS ENTERING CUSTOMER PIPING SYSTEMS IN SOME CASES RESULTED IN HIGH PILOT LIGHT FLAMES WHICH INITIATED FIRES IN BUILDINGS; WHILE IN OTHER CASES, THE PILOT LIGHT FLAMES WERE BLOWN OUT, ALLOWING GAS TO ESCAPE WITHIN THE BUILDINGS. OF THE 167 BUILDINGS AFFECTED BY THE OVER PRESSURE, 12 WERE DESTROYED AND 32 SUSTAINED MODERATE TO HEAVY DAMAGES. FIVE PERSONS RECEIVED MINOR INJURIES.\n\nProbable Cause: None\n\nNtsbnumber: DCA82MP010\n\nReport Number: PAR-82-03\n\nAddressee Name: Missouri Power and Light Company\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1983-02-16\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1982-10-07\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: MISSOURI POWER AND LIGHT COMPANY LETTER: WE HAVE ALREADY INSPECTED EACH DISTRICT REGULATOR STATION AND REVIEWED CONTROL LINE LOCATIONS. WHERE THERE WAS A QUESTION ABOUT THE SECURITY OF A CONTROL LINE, WE HAVE MADE MODIFICATIONS.\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1983-02-16\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: The actions you have described concerning appropriate inspections and reviews with associated corrective actions are satisfactory in fulfilling these recommendations. We have placed P-82-33 and -34 in a “Closed--Acceptable Action” status.","truncated":false,"body_characters":2457}