ML021710130

May 2002 Monthly Operating Report for Vermont Yankee

ML021710130
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	06/10/2002
From:	Bronson K Vermont Yankee
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BVY-02-39
Download: ML021710130 (6)

Text

VERMONT YANKEE NUCLEAR POWER STATION P.O. Box 157, Governor Hunt Road Vernon, Vermont 05354-0157 (802) 257-7711 June 10, 2002 BVY-02-39 United States Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Reference:

(a) License No. DPR-28 (Docket No. 50-271)

In accordance with section 6.6.B of the Vermont Yankee Technical Specifications, submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of May, 2002.

Sincerely, VERMOY YANKEE NUCLEAR POWER STATION Kevin H. Bronson Plant Manager cc: USNRC Region I Administrator USNRC Resident Inspector - VYNPS USNRC Project Manager - VYNPS

VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 02-05 FOR THE MONTH OF MAY 2002

OPERATING DATA REPORT DOCKET NO.50-271 DATE 020610 COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 OPERATING STATUS

1. Unit Name: Vermont Yankee

2. Reporting Period: May

3. Licensed Thermal Power(MWt):1593

4. Nameplate Rating(Gross MWe): 540

5. Design Electrical Rating(Net MWe): 522

6. Maximum Dependable Capacity(Gross MWe): 535

7. Maximum Dependable Capacity(Net MWe): 510

8. If changes, occur in capacity ratings(Items Number 3 through 7) since last report, give reasons:

9. Power level to which restricted, if any(Net MWe): N/A

10. Reasons for restrictions, if any: N/A This Month Yr-to-Date Cumulative

11. Hours in Reporting Period 744.00 3623.00 257831.00

12. Number Of Hours Reactor was Critical 487.88 3366.88 218482.30

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 460.70 3339.70 214886.14

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated(MWH) 645131.15 4958251.70 325148335.91

17. Gross Electrical Energy Generated(MWH) 219181.00 1700969.00 109130558.00

18. Net Electrical Energy Generated(MWH) 209953.00 1633782.00 103853525.00

19. Unit Service Factor 61.90 92.20 82.30

20. Unit Availability Factor 61.90 92.20 82.30

21. Unit Capacity Factor(Using MDC Net) 55.30 88.40 78.70

22. Unit Capacity Factor(Using DER Net) 54.10 86.40 77.10

23. Unit Forced Outage Rate 0.00 0.00 4.02

24. Shutdowns scheduled over next 6 months(Type, Date, and Duration of Each:

25. If shut down at end of report period, estimated date of startup: N/A

26. Units In Test Status(prior to commercial operation): N/A Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01 (Sample)

DP 0411 Rev. 7 Page 1 of 1 RT No. 13.F01.19F

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 020610 COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 MONTH May DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net)

1. 476 17. 0

2. 476 18. 0

3. 476 19. 0

4. 476 20. 0

5. 476 21. 0

6. 458 22. 0

7. 474 23. 93

8. 474 24. 312

9. 474 25. 430

10. 474 26. 419

11. 222 27. 481

12. 0 28. 524

13. 0 29. 524

14. 0 30. 525

15. 0 31. 524

16. 0 INSTRUCTIONS:

On this format, list the average daily unit power level in MWE-Net for each day in the reporting month. Compute to the nearest whole megawatt.

VYDPF 0411.02 (Sample)

DP 0411 Rev. 7 Page 1 of 1 RT No. 13.F01.18V

UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH MAY DOCKET NO 50-271 UNIT NAME Vermont Yankee DATE 020610 COMPLETED BY G.A. Wallin TELEPHONE (802)258-5414 1 2 3 4 5 No. Date Type Duration Reason Method of License System Component Cause and Corrective (hours) Shutting Event Code Code Action to Prevent Down Report # Recurrence Reactor 02-09 020511 5 283.30 B,C 1 N/A RB CONROD Shutdown for Mid-Cycle Refueling outage 02-10 020526 S 0.00 H 4 N/A RB CONROD Rod pattern adjustment Power Reduction 1 F: Forced 2 Reason: 3 Method: 4 Exhibit G- Instructions S: Scheduled A-Equipment Failure (Explain) 1 - Manual for Preparation of Data B-Maintenance or Test 2 - Manual Scram Entry Sheets for License C-Refueling 3 - Automatic Scram Event Report (LER) File D-Regulatory Restriction 4 - Other (Explain) (NUREG 0161)

E-Operator Training and License Examination 5 Exhibit I - Same Source VYDPF 0411.03 F-Administrative DP 0411 Rev. 7 G-Operational Error (Explain)

Page 1 of 1 H-(Explain) - Rod pattern exchange

DOCKET NO. 50-271 DATE 020610 COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 REPORT MONTH May

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 54.4 of rated thermal power for the month.

Gross electrical generation was 219,181 MWHe or 53.9% design electrical capacity.

Operating Summary The following is a chronological description of plant operations including other pertinent items of interest for the month:

At the beginning of the reporting period the plant was operating at 90.9%

of rated thermal power.

020511 At 0807 hours0.00934 days <br />0.224 hours <br />0.00133 weeks <br />3.070635e-4 months <br />, commenced a plant shutdown for a mid-cycle refueling.

See Unit Shutdowns and Power Reductions) 020511 At 1522 hours0.0176 days <br />0.423 hours <br />0.00252 weeks <br />5.79121e-4 months <br />, the turbine-generator was removed from the grid.

020511 At 2326 hours0.0269 days <br />0.646 hours <br />0.00385 weeks <br />8.85043e-4 months <br />, the reactor was sub-critical.

020522 At 1533 hours0.0177 days <br />0.426 hours <br />0.00253 weeks <br />5.833065e-4 months <br />, the reactor was critical. (See Unit Shutdowns and Power Reductions) 020523 At 1140 hours0.0132 days <br />0.317 hours <br />0.00188 weeks <br />4.3377e-4 months <br />, the turbine-generator was phased to the grid and began a return to full power.

020526 At 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, commenced a power reduction to 66% power for a rod pattern adjustment. (See Unit Shutdowns and Power Reductions) 020526 At 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, began a return to full power following the rod pattern adjustment.

At the end of the reporting period the plant was operating at 99.9% of rated thermal power.

VYDPF 0411.04 (Sample)

DP 0411 Rev. 7 Page 1 of 1 RT No. 13.FO1.18X