05000346/LER-1978-033-03, /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

/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: 05000346/LER-1978-033, Forwards LER 78-033/03L-1 05000346/LER-1978-033-03, /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
References
LER-78-033-03L, LER-78-33-3L, NUDOCS 8002060912
Download: ML19329B927 (1)

LER-1978-033, /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

Event date:
Report date:
3461978033R03 - NRC Website

text

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LICENSEE EVENT REPORT p

v CONTROL BLOCK: l l

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lh (PLEASE PRINT w.s.YP L CEQUIRED INFORMATIONI i

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8 60 61 GoCK ET NL.M8 ER 64 69 EVENT DATg 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, SG l-2 level continued to increase even after closing the Startup Feedwater Valve.

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j Io Ia11 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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iii,,i level in SG l-2 to decrease very slowly. Control of SG l-2 level was obtained at

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,, 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

vere then made to the motor operator of the valve.

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