ML20029B186

Responds to Violations Noted in Insp Repts 50-424/90-32 & 50-425/90-32 on 901222-910118.Corrective Actions:Standing Order Issued to Implement Administrative Controls for Proteus Computer Operations

ML20029B186
Person / Time
Site:	Vogtle
Issue date:	02/28/1991
From:	Hairston W GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ELV-02579, ELV-2579, NUDOCS 9103060141
Download: ML20029B186 (3)

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Docket No. 50-425=

U.- S. Nuclear Regulatory Commission ATTH:- 00cument Control. Desk Washington, D. C'. 20555 Gentlemen:

V0GTLE ELECTRIC GENERATING PLANT REPLY TO A N0J1G1JtLVIOLATION Pursuant to 10 CFR 2.201, Georgia. Power Company (GPC) submits the enclosed reply to a' Notice of Violation as documented sin NRC Inspection Report Nos.

50-424/90-32 anR 50.425/90-32 which concerns the results of an inspection

~ performed by Mr. B. R.- Bonser during the_ period of December 22, 1990 through January:18, 1991.

Please contF.t. this office if you have any questions.

Sincerely, bW. G. Hairston III-&L L

'WGil,III/NJS/gm ,

Enclosures:

. Violation and.GPC Response

-c(w):- Georat a Power Comcaer

-Mr. C..K..McCoy' Mr. W. B.; Shipman Mr. R.' M. Odom i Mr. P. D. Rushton-NORMS l

o U. S. Nucl. gar Reaulatory Commission

-Mr. S._O. Ebneter, Regional Administrator Mr. D. S. Hood, Licensing' Project Manager, NRR

'Mr',-B. R.-Bonser,' Senior Resident Inspector, Vogtle l1 l-L I d'

9103060141 910228 '

PDR ADOCK 05000424 l

l- Q PDR 7I l

i ENCLOSURE

-V0GTLE ELECTRIC GENERATING PLANT - UNIT 2 REPLY TO A NOTICE OF VIOLATION HRC_lNSPECTION REPORT NOS. 50-424/90-32 AND 50-425/90-32 n

" Technical Specification 4.1.3.2 requires that each digital rod position indicator shall be determined to be operable Ly verifying that the Demand q' Position Indication System and the Digital Rod Position-Indication System agree within 12 steps at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> except durbi time intervals when the

. position deviation monitor is inoperable, then compare the Demand Position

-Indication System and the Digital Rod Position Indication System at least once

.per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. '

' Contrary to the above, the licensee failed to ccmpare the Unit 2 Demand Position System and the Digital Rod Position Indication system at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> after rendering the rod position deviation monitor inoperable on January c, 1991'.. The monitor was inoperable from 3:18 p.m. CST on January 2 to 7:45 a.... '

.CS1 on January 7, 1991.

This is a Severity Level IV violation and applies to Unit 2 only (Supplement  ;

I)."

Admission o'r Denial of the Violation 1 The violation occurred as stated. This event was identified and reported' to the NRC-by GPC in' Licensee Event Report (LER) 50-425/1991-001, dated-2-4-91.

Reason for thg Violation:

lhe-violation occurred as a result of a cognitive personnel error on the part of >

a Balance of Plant -(B0P) operator. -The BOP operator failed to follow procedure

'13504-C,," Proteus-Computer,." when entering a computer point value into the l~

Proteus computer.- The operator should have entered a "1" into the entered value i

field--and into the entry scan field, as_ required by procedure. The effect-of this omission was that-the, computer point

YC0400;(Rod Position Deviation Monitor LAlarm) liniit- and scan function were not returned to service.

A contributing cause was the-failure of a relay output circuit card in the -

interface between the Digital-Rod Position Indication (DRPI) and the Proteus

! computer.. The failure was discovered by a plant system engineer several days after the event while investigating the source of rod position values which

' displayed suspect or bad quality data in the Proteus computer.

l LCorrective Steos That Have Been Taken and th d esults Achieved:

l. The:B0P operator has been ~ counseled regarding the importance of procedural compliance.

l 2. The failed relay output circuit card has been replaced.

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ENCLOSURE (CONTINVED)

NRC INSPECTION Rr T NOS. 50-424/90-32 AND b: 13/90-32

3. A Standing Order ha oeen issued which implemer.ts administrative cor.trols for Proteus computer operations and will remain in effect until corrective action 1 as identified below is completed.

4. Procedures 17010-1 & 2, *Annunicator Response Procedures for ALB 10 On Panel ICI on McB,' and 13504-C, ' Proteus Computer," have been revised to provide stricter administrative control of Proteus computer operations. The Proteus compu'.er access codes have been modified to limit the number of individuals with access to change compcter parameters.

Ggir4 4Ive Stens That Will Be Taken To Avoid further Violaticns:

1. A, of 1-28-91, more detail related to the op"' ion of the Proteus computer has been included in licensed operator requalitis.ation training. This requalification training cycle will be completed on 3-8-91. ,

2. Vogtle Electric Generating Plant will irr31ement a routine check (shif tly) of computer generated alarms associated witi TS surveillances by 3-29-91.

Eitte When Fuli [omoliance Will Be Achievej.1 Full compliance was achieved on 1-7-91 at 0743 CST when the Unit Shift Supervisor was advised of the inoperable condition and the T.S. 4.1.3.2 special condition four hour surveillance for an inoperable rod r:sition deviation monitor was initiated.

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