05000315/LER-1985-039, :on 850808,buried Firewater Ring Header Sectionalizing Valve Excavated.Caused by Failure to Perform Tech Spec Surveillance Requirements Re Valve Position.Curb Box Installed.Valve Surveillance Procedures Updated

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:on 850808,buried Firewater Ring Header Sectionalizing Valve Excavated.Caused by Failure to Perform Tech Spec Surveillance Requirements Re Valve Position.Curb Box Installed.Valve Surveillance Procedures Updated
ML20135D936
Person / Time
Site: Cook American Electric Power icon.png
Issue date: 09/06/1985
From: Baker K
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML20135D918 List:
References
LER-85-039, LER-85-39, NUDOCS 8509160233
Download: ML20135D936 (2)
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LER-1985-039, on 850808,buried Firewater Ring Header Sectionalizing Valve Excavated.Caused by Failure to Perform Tech Spec Surveillance Requirements Re Valve Position.Curb Box Installed.Valve Surveillance Procedures Updated
Event date:
Report date:
3151985039R00 - NRC Website
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DURING A FLOW DIAGRAM VERIFICATION WALKDOWN IT WAS FOUND THAT THE FLOW DIAGRAM DID NOT CONCUR WITH THE PHYSICAL LAYOUT OF THE FIREWATER RING HEADER. TIIE RESULTING INVESTIGATION LEAD TO THE EXCAVATION OF A BURIED FIREWATER RING HEADER SECTIONALIZING VALVE,12-FP-129.

ON AUGUST 8,1985 WITH BOTil UNITS IN MODE 5 (COLD SHUTDOWN), IT WAS DETERMINED THAT THE TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS FOR TIIE FIREWATER RING IIEADER VALVE (12-FP-129) WERE NOT BEING PERFORMED AS REQUIRED. A TECHNICAL SPECIFICATION SURVEILLANCE REQUIRES VERIFYING THE VALVE IS IN ITS CORRECT POSITION AT LEAST ONCE PER 31 DAYS (4.7.9.1.1b) AND COMPLETING ONE FULL CYCLE OF TRAVEL AT LEAST ONCE PER 12 MONTIIS (4.7.9.1.1d).

THE VALVE WAS FOUND IN TllE OPEN POSITION AND WAS CYCLED THROUGH ONE FULL CYCLE AT THE TIME OF ITS DISCOVERY.

TO PERMIT FUTURE VALVE IDENTIFICATION AND TESTING:

1) A CURB BOX HAS BEEN INSTALLED OVER THE VALVE WITH PROPER LABELING AND, 2) THE VALVE HAS BEEN INCLUDED IN THE APPROPRIATE SURVEILLANCE TEST PROCEDURE.

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DOCKET NUMBER (21 LER NUMBER 16s PAGE431

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ON JULY 26, 1985, DURING TIIE WALKDOWN VERIFICATION OF THE OUTSIDE FIREWATER RING LEADER FLOW DIAGRAM, IT WAS DISCOVERED THAT A DISCREPANCY BETWEEN THE FLOW DIAGRAM, PIPING DRAWINGS AND TIE FIELD EXISTED. A VALVE LABELED AS A SECTIONALIZING VALVE WAS LOCATED WHERE A HYDRANT ISOLATION VALVE EXISTED ACCORDING TO THE PIPING DRAWING. A FLOW TEST WAS PERFORMED WHICH IDENTIFIED TIE VALVE (LABELED AS SECTIONALIZING VALVE 12-FP-132)

AS HYDRANT ISOLATION VALVE 12-FP-133.

THE DISCOVERY THAT A VALVE PREVIOUSLY BELIEVED TO BE A SECTIONALIZING VALVE WAS ACTUALLY A IIYDRANT ISOLATION VALVE RAlSED TiiE QUESTION OF A MISSING SECTIONALIZING VALVE. A SECOND FLOW TEST WAS PERFORMED TO DETERMINE TIIAT TIE MISSING SECTIONALIZING VALVE WAS OPEN. THIS WAS COMPLETED AT 1300 HOURS AND SIIOWED NO NOTICABLE RESTRICTION OF FLOW THROUGH TIE SECTION OF PIPE WHERE TIE VALVE WOULD BE LOCATED.

ON AUGUST 7, 1985, AFTER ADDITIONAL INVESTIGATION, ASPl! ALT WAS REMOVED FROM JUST INSIDE THE SECURITY FENCE AND EXCAVATION COMMENCED. A VALVE STEM EXTENSION WAS UNCOVERED TWO FEET BELOW TIE PAVEMENT LEVEL. THE VALVE WAS VERIFIED OPEN BY STROKING IT SEVERAL TURNS CLOSED THEN OPEN. ON AUGUST 8,1985, AT 1115 IIOURS, TIE COMPLETE VALVE WAS UNCOVERED, IT WAS DETERMINED TO BE A 12 INClf FIREWATER HEADER SECTIONALIZING VALVE.

THE VALVE WAS STROKED THROUGH ONE FULL CYCLE AND VERIFIED IN TlfE OPEN POSITION AT 1130 HOURS. A CURB BOX WAS INSTALLED FOR Ti!IS VALVE AND IT WAS RE-BURIED. TIE LABELLING FOR ALL THE FIREWATER VALVES INVOLVED WAS CORRECTED AND THE ASSOCIATED SURVEILLANCE TEST PROCEDURE UPDATED.

THE REASON WHY OR WHEN THE SECTIONALIZING VALVE WAS BURIED COULD NOT BE DETERMINED.

HOWEVER, THE VALVE WAS NOT KNOWN TO EXIST IN 1979 WlEN THE AREA INSIDE TIE PROTECTED AREA FENCE WAS PAVED. NO INDICATION OF THIS VALVE EXISTED AT THAT TIME.

THE FLOW DIAGRAM VERIFICATION WALKDOWN liAS BEEN COMPLETED FOR THE ENTIRE OUTSIDE FIREWATER RING HEADER. THIS WALKDOWN INCLUDED COMPARIS0N OF THE FLOW DIAGRAM TO BOTH THE PIPING DRAWINGS AND TIIE FIELD WITH NO OTIIER VALVE PROBLEMS BEING DISCOVERED.

A SIMILAR OCCURRENCE REPORTED IN LER 84-025-00.

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