ML20009D540

LER 81-022/03L-0:on 810618,during Surveillance,Feedwater Snubber 1-FWS-1 Found to Have Rotated to Position Allowing Air to Enter Fluid Inlet Ports.During Functional Bench Test, Snubber Failed to Lock Up.Caused by Loose Locknut

ML20009D540
Person / Time
Site:	Cook
Issue date:	07/17/1981
From:	Piehl R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009D536	List: 05000315/LER-1981-022, Forwards LER 81-022/03L-0 05000315/LER-1981-022-03, /03L-0:on 810618,during Surveillance,Feedwater Snubber 1-FWS-1 Found to Have Rotated to Position Allowing Air to Enter Fluid Inlet Ports.During Functional Bench Test, Snubber Failed to Lock Up.Caused by Loose Locknut
References
LER-81-022-03L-01, LER-81-22-3L-1, NUDOCS 8107240153
Download: ML20009D540 (1)

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NRC FORM 366 U.S. MUCLEAR REGULATORY COMMISSIOR.

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, e LICENSEE EVENT REPORT

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EVENT DESCRIPT!ON AND PROBABLE CONSEQUENCES h

IO I2l l DURING PERFORMANCE OF INACCESSIBLE HYDRAULIC SNUBBER SURVEILLANCE, FEEDWATER I g o l3l l SNUBBER 1-FWS-1 WAS FOUND TO HAVE ROTATED TO A POSITION ALLOWING AIR TO ENTER l y o l4l l THE FLUID INLET PORTS. DURING FUNCTIONAL BENCH TEST, THE SNUBBER FATLED TO l

inl3; l LOCKUP IN EITHER COMPRESSION OR TENSION AND WAS DECLARED AN INSPECTION FAILURE l loisl-l PER T.S. 4. 7.8.1.1. HEALTH AND SAFETY OF THE PUBLIC WAS NOT AFFECTED. A SIMILAR l 10 l 7 l l OCCURRENCE WAS REPORTED AS RO 78/086/03L-0 FOR DOCKET 050-0316. l l

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< CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l1lo l l WORK WAS IN PROGRESS IN THE AREA AND SNUBBER MAY HAVE BEEN BWPED OR STEPPED ON, l i i l CAUSING THE EXTENSION ARM LOCKNUT TO LOOSEN. THE SNUBBER WAS REFILLED, BLED. I i 7 l TESTED AND REINSTALLED WITH NUTS TIGHTENED Ato STAKED. LETTER SENT TO DEPART- l l ,13 l l MENT HEADS REQUESTING PERSONNEL BE CAUTIONED TO USE CARE NEAR HYDRAULIC SNUBBER l 3 4 l ' INSTALLATIONS. INSPECTION FREQUENCY CHANGED PER T.S. TABLE 4.7-9. I 80 4

7 8 9 ST S  % POWE R OTHER STATUS Di O RY DISCOVEe4Y DESCRIPTION 32

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' 8107240153 810717 NRC USE ONt Y ISSUE PDR ADOCK 05000315 ,

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616- 65-5901, EXT.1036 NAVE OF PREPARER

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