ML19329A973

LER 78-069/03L-0:on 780619,seismic Recorder Timing Marks Found Out of Tolerance.Caused by Drifting Regulators on Oscillator Boards.Parts Ordered on 790621.Surveillance Test 5034.02 Will Be Revised to Include Tolerance Criteria

ML19329A973
Person / Time
Site:	Davis Besse
Issue date:	07/13/1978
From:	Aebie K TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-78-069-03L, LER-78-69-3L, NUDOCS 8001280712
Download: ML19329A973 (1)

Text

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U. S. NUCLEAR REGULATORY COMMISSION r RC FORM 364 (7 77) ' IJCENSEE EVENT REPORT

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60 68 occKET NU*.'3ER da e3 6% ENT cATE 7. 7s AsPoRT cATE 83 7 8 EVENT OESCRIPTION AND PROBASLE CONSEQUENCES h I On 6/19/78, it was discovered that the seis=ic recorder thNg narks were out of t o 121 1 l

g g tolerance. This placed the unit in the Action Statement of Technical Specification go,,,; 3.3.3.3. There was no danger to the health and safety of the public or unit personne11 i

Three peak recording acceleronaters were operable. By transmitting the recording Io IsI I reflect the I g o is l for off-site analysis, the data could have been correlated to oronerly I

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CAUSE DESCRIPTION AND CCR AEGTIVE ACTIONS ing = ark problem discovered the 9 volt voltare reculatord I i l o j IThe troubleshooting of the t*

Parts vera e-de-=4 m i i i lon the voltage controlled escillater boards were drif tine.

surveilla h g ;TTl 16/21/78. Work will be perfor=ed under "aintenance Work order IC-78-208.

1 g,,3j l Test ST 5034.02, vill be revised to include accentance criteria covertre the,*mine I

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t RY otsCoVERY oEsCmPTioN oTH ER STATUS sf 4 POWER l Ii15IlCl@ l0l010l@l NA l l3{@lSurveillanceTestReview ACTivtTY Co TENT tocariom or RELEASE h REttAsto enREttAsE ITT 1 [z 1@ LZj@l NA AucuMTor AcTivrTv

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PERSONNEL EXPOSURES NUMSER TYPE oEscRIPT1oN I 1 1711010101@lz l@l"NA '

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NuusER a tsoEscRirTioNh I 80 101010 l@l NA 11 12

• 9 toss of oR oAMact To FACILITV TYF 2 otsCRl* Tion R 0 012 l I i 191 [z,J@l NA NRC USE CNLY

• f#cR,, Tion @ 78/8/Mh#[ j iiliIIIIIIIIli 2 o ,,,u,'"@lNA 68 69 80 3 to 7

DVR 78-116 8 9 en Aebie PHONE:

419-259-5000, Ext. 234 {

NAME OF PREPARER j

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