ML17265A636

Part 21 Rept Re Power Supply That Did Not Work Properly When Drawn from Stock & Installed in -25 Vdc Slot.Power Supply Will Be Sent to Vendor to Perform Failure Mode Assessment.Evaluation Will Be Completed by 991001

ML17265A636
Person / Time
Site:	Ginna
Issue date:	04/23/1999
From:	Popp R ROCHESTER GAS & ELECTRIC CORP.
To:	Vissing G NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-99 NUDOCS 9904300200
Download: ML17265A636 (5)

Text

REGULATE Y IH'FORMATION DISTRIBUTIO YSTEM (RIDS)

ACCESSION NBR:9904300200 DOC.DATE: 99/04/23 NOTARIZED: NO DOCKET FACIL:50-244 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester G 05000244 AUTH. NAME AUTHOR AFFILIATION POPP,R.W. Rochester Gas & Electric Corp.

RECIP.NAME RECIPIENT AFFILIATION VISSING,G.S.

SUBJECT:

Part 21 rept re power supply that did not work properly when drawn from stock &. installed in -25 VDC slot. Power supply will be sent to vendor to perform failure mode assessment. Evaluation will be completed by 991001.

DISTRIBUTION CODE: IE19T COPIES RECEIVED:LTR l ENCL I SIZE:

TITLE: Part 21 Rept (50 DKT)

E NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72). 05000244 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL LPD1-1 PD 1 1 VISSING,G. 1 1 INTERNAL: ILE CENTER 1 1 NRR/DRIP/REXB 1 1 P / ~ 1 1 RES/DET/EIB 1 1 RGN1 1 1 RGN2 1 1 RGN3 1 1 RGN4 1 1 EXTERNAL: INPO RECORD CTR NOAC SILVER,E 1 1 NRC PDR NUDOCS FULL TXT 1 1 D

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@)~S N NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRZBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD) ON EXTENSION 415-2083 FULL TEXT CONVERS10N REQUIRED TOTAL NUMBER OF COPIES REQUIRED: LTTR 14 ENCL 14

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~~j', STAtt ROCHESTER GAS AND ELECTRIC CORPORATION o 89 EAST AVENUE, ROCHESTER, N.Y. 14649-000 TELEPHONE AREA CODE 7ld 546-2700 April 23, 1999 U.ST Nuclear Regulatory Commission Document Control Desk Attn: Guy S. Vissing Project Directorate I-1 Washington, D.C. 20555

Subject:

10 CFR Part 21 Interim Report R.E. Ginna Nuclear Power Plant Docket No. 50-244

Dear Mr. Vissing:

The attached 10 CFR 21 interim report is submitted in accordance with 10 CFR Part 21, Reporting of Defects and Noncompliance, Section 21 (a) (2), which requires "if an evaluation of an identified deviation or failure to comply potentially associated with a substantial safety hazard cannot be completed within 60 days from discovery of the deviation or failure to comply, an interim report is prepared and submitted to the Commission".

Very truly yours, xc'obert Mr. Guy S. Vissing (Mail Stop 8C2)

Project Directorate I-1 Division of Reactor Projects - I/II W. Popp Office of Nuclear Reactor Regulation U. S ~ Nuclear Regulatory Commission Washington, D.C. 20555 Regional Administrator, Region I U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 U.S. NRC Ginna Senior Resident Inspector 9904300200 990423 .. ZQ 5 PDR ADQCK 05000244 S PDR

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(10CPR21 SUBSTANTIAL SAFETY HAZARD EVALUATION INTERIM REPORT DESCRIPTION OF DEVIATION:

A power supply, procured for use in the Nuclear Instrument System (NIS) source ranges (SR), when drawn from stock and placed in NIS SR channel N-31, did not work properly when installed in the -25 VDC slot. However, the power supply functioned properly when installed in the +25 VDC slot.

This power supply is expected to function properly in both the positive and negative slots. It is not known whether this was a deviation present since receipt from the vendor, or was initiated during installation activities at Ginna Station (and not a deviation).

REFERENCE DOCUMENTS:

Rochester Gas & Electric Purchase Order NQ15139-C-JW DATE WHEN EVALUATIONWILLBE COMPLETED:

The power supply will be sent to the vendor to perform a failure mode assessment and determine was deficient at the time of receipt.

ifIt is the power supply estimated that this evaluation will be completed by October 1, 1999.

S -ems Engineer, IEC 5 Electrical System Reviewed:

Ma ger, Nuclear Stra e and Procurement

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