05000281/LER-1981-005-03, /03L-0:on 810204,air Motors for Preferred Start 2 of Emergency Diesel Generator 3 Found Engaged to Flywheel. Caused by Air Leakage Through Solenoid Valve.Solenoid & Air Motors Replaced

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/03L-0:on 810204,air Motors for Preferred Start 2 of Emergency Diesel Generator 3 Found Engaged to Flywheel. Caused by Air Leakage Through Solenoid Valve.Solenoid & Air Motors Replaced
ML18139B132
Person / Time
Site: Surry Dominion icon.png
Issue date: 03/02/1981
From: Joshua Wilson
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B131 List:
References
LER-81-005-03L-01, LER-81-5-3L-1, NUDOCS 8103060596
Download: ML18139B132 (2)
v • d • e


LER-1981-005, /03L-0:on 810204,air Motors for Preferred Start 2 of Emergency Diesel Generator 3 Found Engaged to Flywheel. Caused by Air Leakage Through Solenoid Valve.Solenoid & Air Motors Replaced
Event date:
Report date:
2811981005R03 - NRC Website
v • d • e

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NRC FORM 36ij (7-77) e AucLSAR RSGULATORv c0Mllli1ss10N LICENSEE EVENT REPORT CONTROL SLOCK: I 10 (PLSASS PRINT OR TYPE ALL REQUIRED INFORMATION) 1"" _

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8 6Q 61 DOCKET NUMBER 68 69

,:VENT CATE.

74 75 REPORT CATE

  • 80 EVENT OiiSCi=!IPTION ANO PROBABLE CONSEQUENCES@

[]J]J I On February 4,1980, with the Unit at 100% power,. Periodic Test 22.3C was initiated I

@JI] I to prove operability of 113 EDG following Maintenance.

The air motors for C9:[IJ I Preferred Start 112 were* found to be.-,engaged to the *flywheel.

  • This event is a

[§))] I degraded Mode of operation as Specified in T.S. 3.16.B.1 and is reportable in

!TI[] I accordance with 6.6.2.b.(2).

The /12 EDG was operable and would bave supplied

((III I power to the Redundant Safeguards Equipment.

Therefore, the health and safety of C§JIJ. I the public were not affected.

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CAUSE 01:SCRIPTION ANO CORRECTIVE ACTIONS @

44 47 JAir leakage through th~ solenoid valve for preferred start #2 caused the motors to

!IIIJ I remain engaged to the flywheel.

The defective solenoid and both air motors were O::JJ] I replaced and the EDG tested satisfactorily.

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ATTACHMENT 1 SURRY POWER

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REPORT"NO:

EVENT DATE:

.. -=-*-----:--~.--*.-----~-----....... _ ____...:_ -~-- - --** *-*--~------- -- - -*. ____.:_~

e STATION, UNIT 2 50-281 81-005/03L-O 02 81 TITLE.OF EVENT:,

AIR MlTOR MALFUNCTION (1/3 EDG)

1.

DESCRIPTION OF EVENT

e On February 4, 1981, with Unit 2 operating at 100% power, Periodic Test 22.3C was in progress with the diesel at full load to prove operab-ility of the //3---EDG following battezy maintenance.

The air motors -forp_referred start 112 were found t;o

.b.e.--.. em:1:tin:trQus..l)f :,>~ngaged to the flywheel.

This event is -a degraded-mode-of. -

operation as s-pec:ified in T. S. 3.16. B.1 and is report$ le in accordance with T. S. 6.6~2.B~(2).

2.

EROBABLE CONSEQUENCES AND STATUS OF REDUNDANT EQUIPMENT:

  • The Emergency Diesel Cenerators provide power to vital equipment in the event of loss of off-site paver.

The preferred start /11 air motors of //3: EDG remained dperab!eC In addition, the No. 2 EDG was operable and would have supplied* p~er to the redundant safeguards e~uipment.

'lhe EDG was repaired and returned to an operable status within the time limitations of Tech. Specs.

Therefore, the health and safety of the public were not affected._

3.

CAUSE

Air leakage through the Solen~~d Valve for preferred start #2 caused the motors to remain engaged to the flywheel.

4.

IMMEDIATE CORRECTIVE ACTION

The air supply to the"_ preferred* start //2 was* isolated to _ dis~ng~g__e*_ t~!:! ____ mqtors._

5.

SUBSEQUENT CORRECTIVE ACTION:

The soleniod valve and both air motets for perferr~d: _st_~r_1; /12._w_e~e __ _teplaced __ anL __________ _

_ the EDG tested* satisfactorily.

6.

ACTION TAKEN TO PREVENT RECURRENCE:

This is a random failure of the Solencimd Val.v:e:.- therefor~.llCL.further.....ac.tion---is---------

anticipated.

7.

GENERIC* IMPLICATIONS:

None.

--*-t:-* --*--

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