ML040140509

Stations, Units 1 and 2 - Engineering Evaluation Results and Closure of Commitment for Management of Environmentally Assisted Fatigue in Safety Injection Accumulator and Charging Nozzles

ML040140509
Person / Time
Site:	Surry, North Anna
Issue date:	01/06/2004
From:	Hartz L Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
03-616
Download: ML040140509 (2)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RIcHMOND, VIRGINIA 23261 January 6, 2004 United States Nuclear Regulatory Commission Serial No.:

03-616 Attention: Document Control Desk LR/CTS RO' Washington, DC 20555-0001 Docket Nos.:

50-280/281 50-338/339 License Nos.: DPR-32/37 NPF-4f7 VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION)

SURRY POWER STATION UNITS I AND 2 NORTH ANNA POWER STATION UNITS 1 AND 2 ENGINEERING EVALUATION RESULTS AND CLOSURE OF COMMITMENT FOR MANAGEMENT OF ENVIRONMENTALLY ASSISTED FATIGUE IN SAFETY INJECTION ACCUMULATOR AND CHARGING NOZZLES A specific commitment of the renewed operating licenses for both the Surry and North Anna Power Stations was management of environmentally assisted fatigue for safety injection (SI) accumulator and charging line nozzles. As stated in Section 18.3.2.4 and in Table 18-1 (Item 25) of the UFSARs for both stations, an acceptable approach for addressing this issue was to further refine the fatigue analyses for SI accumulator and charging line nozzles using the guidance of ASME Code Section 1I, NB-3200, in an effort to reduce the cumulative usage factors (CUF) for the nozzles to values that are below the Code limit of 1.0. The enhanced fatigue analyses have been completed and confirm that the CUF values for the SI accumulator and charging nozzles at Surry and North Anna are below the limit of 1.0. Therefore, no additional inspections are required for these nozzles due to environmentally assisted fatigue and no further action is required for Item 25 of UFSAR Table 18-1. Appropriate changes will be made in the UFSARs for the Surry and North Anna Power Stations to document this conclusion and the closure of this commitment.

Should you have any questions regarding this submittal, please contact Mr. C. T. Snow at (804) 273-2937.

Very truly yours, Leslie N. Hartz Vice President - Nuclear Engineering Commitments made in this letter: None.

Serial No.03-616 SPS/NAPS Environmentally Assisted Fatigue cc page 1 of 1 cc:

U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth St., SW, Suite 23 T85 Atlanta, GA 30303-8931 Mr. C. Gratton Senior Project Manager U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 8G9 Rockville, MD 20852-2738 Mr. S. R. Monarque Project Manager U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 8H12 Rockville, MD 20852-2738 Mr. M. T. Widmann NRC Senior Resident Inspector North Anna Power Station Mr. G. J. McCoy NRC Senior Resident Inspector Surry Power Station Mr. J. E. Reasor Old Dominion Electric Cooperative Innsbrook Corporate Center 4201 Dominion Boulevard Suite 300 Glen Allen, VA 23060