ML19329B927

LER 78-033/03L-1:on 780325 Steam,Generator 1-2 Level Found Increasing After Closing Startup Feedwater Valve,Exceeding Max Limit.Main Feedwater Block Valve FW 779 Closed Manually, Controling SG 1-2 Level

ML19329B927
Person / Time
Site:	Davis Besse
Issue date:	04/20/1978
From:	Marley J TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19329B917	List: ML19329B916 ML19329B927
References
LER-78-033-03L, LER-78-33-3L, NUDOCS 8002060912
Download: ML19329B927 (1)

Text

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LICENSEE EVENT REPORT p

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CONTROL BLOCK: l l l, 1. , ' lh (PLEASE PRINT w.s .YP L CEQUIRED INFORMATIONI i e l1T 58l@

lo l 7 o lH D 3Co0ESl1 @l15010 l- l0 l0 lN !? lF l- l0 l3 l@l4 UCENSEE 14 uCENSE NuMSEM 25 ;6 uCENSE11 TYPEl1 40 1167 CA l@l CON'T Fl 7 8 scuRCE l60 L @l 0 15 GoCK 61 10 ETl-NL.M8 10ERl 3 l 4641669@l 0 13DATg12 15 17 18 @l31412!01718l@

EVENT 14 75 REPcRT QATE 30 EVENT DESCRIPTION AND PRC8ABLE CONSEQUENCES h la#2l l After shutting down the unit to Mode 3 and raising Steam Generator (SG) 1-2 level,  !

Io Ia11 SG l-2 level continued to increase even after closing the Startup Feedwater Valve. [ j i o ,, i l At 0455 hours0.00527 days <br />0.126 hours <br />7.523148e-4 weeks <br />1.731275e-4 months <br /> on 3/25/78, the level exceeded the =aximum limit. This placed the unitI lo is1 I in Action 3 of T.S. 3.4.5. There was no danger to the health and safety of the publig lois1 I or unit personnel. No steam li:o break occurred during the short period of ti=e the I jo;7; l Steam Generator level slightly exceeded 86%. CIP-33-78-36) {

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SEQUENTIAL OCCURRENCE REPORT REVi$loN EVENT YE A R REPORT No. CcOE TYPE No.

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21 22 23 24 26 27 28 ;9 30 31 KN ~ AC o oNP T MET o MouR$ $8 i FoR 8. SUP E MAN FAC RER l22E l@l24Z l@ l Z lg l0101010l4o lYl@ IN l@ lA]@ lL l 2 l 0 l 0 l@l 25 l:sZl@ si 4i 42 42 4A 47 CAUSE CESCRIPTION AND CORRECTIVE ACTIONS h l i i o l l An operator entered containment and opened one SG drain on SG l-2. This caused the I iii,,i level in SG l-2 to decrease very slowly. Control of SG l-2 level was obtained at ]

, , i ,i ; 0517 hours0.00598 days <br />0.144 hours <br />8.54828e-4 weeks <br />1.967185e-4 months <br /> on 3/25/78 by manually closing the motor operated Main Feedwater Block l i,,3j l Valve FW 779 which had not been co=pletely closed by its =otor operator. Adjustments I i,i4i  ; vere then made to the motor operator of the valve . I 30 l 7 8 3 4 power oTHEM STATUS Y 015CoVERY CESCRIPT1oN ST T ci li j 5 l l Dl@ l 0 l 010 l@l NA l l A l@l Operator Observation of SG level l l

AhVtTY C PTENT l RELEASE AMOUNT of ACTIVtTY LOCATION oF RELEASE l i Is l I Zi @D op mELEASE12!@l NA l l NA l PER5oNNEL EXPOS ES NUMRER TYPE oESCRIPT1oN l1l 7l l l  ! l l  ! NA PER5CNNEL INJu IES OESCRIPT1oN I

li 191 3l 01NUVSERI O l@i NA11 12 80 l

LOSS of oR DAMACE To FActuTV Q O o n o p 9 60 '7/2 l

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68 69 30 1 7 a 9 10 NAME OF PAEPARER U8

• lY PHCN E: 419-25 9- 5000. Ext. 276 {