ML042300498

July 2004 Monthly Operating Report for Vermont Yankee Nuclear Power Station

ML042300498
Person / Time
Site:	Vermont Yankee
Issue date:	08/10/2004
From:	Bronson K Entergy Nuclear Northeast, Entergy Nuclear Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BVY-04-075
Download: ML042300498 (6)

Text

Entergy Nuclear Northeast Entergy Nuclear Operations, Inc.

Vermont Yankee A-En terggy 322 Governor Hunt Rd.

P.O. Box 157 Vernon, VT 05354 Tel 802-257-7711 August 10, 2004 BVY-04-075 United States Nuclear Regulatory Commission AITN: 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 July. 2004.

Sincerely, Kevin H. Bronson General Manager, Plant Operations cc: USNRC Region I Administrator USNRC Resident Inspector USNRC Project Manager J:Zq

VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 04-07 FOR THE MONTH OF JULY 2004

OPERATING DATA REPORT DOCKETNO.50-271 DATE 040810 COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 OPERATING STATUS

1. Unit Name: Vermont Yankee

2. Reporting Period: JULY

3. Licensed Thermal Power(MWt):1593

4. Nameplate Rating(Gross MWe): 540 I I

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): 513

10. Reasons for restrictions, if any: High pressure turbine was replaced during RFO-24 with a unit designed for 1912 MWt. This results in the unit running at a lower efficiency when at 1593 MWt or lower.

This Month Yr-to-Date Cumulative

11. Hours in Reporting Period 744.00 5111.00 280032.80

12. Number Of Hours Reactor was Critical 626.83 3986.00 235787.22

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 601.30 3928.37 232055.06

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated(MWH) 936535.45 6185117.65 352158107.39

17. Gross Electrical Energy Generated(MWH) 304722.00 2094816.00 118327068.00

18. Net Electrical Energy Generated(MWH) 287777.00 2003690.00 112630201.00

19. Unit Service Factor 80.82 76.86 82.87

20. Unit Availability Factor 80.82 76.86 82.87

21. Unit Capacity Factor(Using MDC Net) 75.84 76.87 79.53

22. Unit Capacity Factor(Using DER Net) 74.10 75.10 77.90

23. Unit Forced Outage Rate 19.18 10.24 3.96

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

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. 8 Page 1 of 1 RT No. 13.F01.19F

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 040810 COMPLETED BY G.A. WALLIN TELEPHONE (802) 258-5414 MONTH JULY DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net)

1. 0 17. 489

2. 0 18. 477

3. 0 19. 488

4. 0 20. 492

5. 0 21. 492

6. 30 22. 491

7. 281 23. 490

8. 451 24. 491

9. 443 25. 488

10. 496 26. 491

11. 496 27. 490

12. 492 28. 491

13. 493 29. 501

14. 494 30. 494

15. 492 31. 489

16. 493 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. 8 Page 1 of 1 RT No. 13.FO1.18V

UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH JULY DOCKET NO 50-271 UNIT NAME Vermont Yankee DATE 040810 COMPLETED BY G.A. Wallin TELEPHONE (802)258-5414 1 2 3 4 5 Cause and Corrective Action to Prevent No. Date Type Duration Reason Method of License System Component Recurrence.

Shutting Event Code Code (hours) Down Report #

Reactor 04-03 040706 F 142.70 A 3 2004-003 EB TRANSF Generator load reject due (cont) to electrical fault on main transformer 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 F-Administrative G-Operational Error (Explain)

H- (Explain) VYDPF 0411.03 DP 0411 Rev. 8 Page 1 of 1

DOCKET NO. 50-271 DATE 040810 COMPLETED BY G.A. Wallin TELEPHONE (802)258-5414 REPORT MONTH JULY

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 57.5% of rated thermal power for the month.

Gross electrical generation was 304,722 MWHe or 78.9% 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 00.0%

of rated thermal power.

040705 At 2110 hours0.0244 days <br />0.586 hours <br />0.00349 weeks <br />8.02855e-4 months <br />, the reactor was critical. (See Unit Shutdowns and Power Reductions) 040706 At 2242 hours0.0259 days <br />0.623 hours <br />0.00371 weeks <br />8.53081e-4 months <br />, the turbine-generator was phased to the grid and began a return to full power.

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. 8 Page 1 of 1 RT No. 13.FO1.18X