Part 21 Report - 1999-250

ACCESSION #: 9904300200

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RGE
ROCHESTER GAS AND ELECTRIC CORPORATION
89 EAST AVENUE, ROCHESTER, N.Y.
14649-0001

TELEPHONE AREA CODE: 716 546-2700

April 23, 1999

U.S. 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, Robert W. Popp

xc:

Mr. Guy S. Vissing (Mail Stop 8C2) Project Directorate I-1 Division of Reactor Projects - I/II 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

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10CFR21 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 EVALUATION WILL BE COMPLETED:

The power supply will be sent to the vendor to perform a failure mode assessment and determine if the power supply was deficient at the time of receipt. It is estimated that this evaluation will be completed by October 1, 1999.

Prepared:	Systems Engineer, I&C & Electrical System	Date
Reviewed:	Manager, Nuclear Strategy and Procurement	Date

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