BVY-96-001, Monthly Operating Rept for Dec 1995 for Vermont Yankee Nuclear Power Station

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Monthly Operating Rept for Dec 1995 for Vermont Yankee Nuclear Power Station
ML20096B891
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 12/31/1995
From: Wallin G, Wanczyk R
VERMONT YANKEE NUCLEAR POWER CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-96-001, BVY-96-1, VY-RE-96-001, VY-RE-96-1, NUDOCS 9601170005
Download: ML20096B891 (6)
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VERMONT YANKEE NUCLEAR POWER CORPORATION

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q~ P.O. Box 157, Governor Hunt Road

\ Vernon, Verrnont 05354-0157

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(802) 257-7711 x ,

January 10, 1996 VY-RE-96-001 BVY-96-001 U.S. 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 6.7.A 3 of the Vermont Yankee Technical Specifications, submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of December, 1995.

Sincerely, Vermont Yankee Nuclear Power Corp.

.td Robert J. Wanczyk Plant Manager cc: USNRC Region I Administrator USNRC Resident Inspector - VYNPS USNRC Project Manager - VYNPS l

9601170005 951231 /' gg PDR ADOCK 05000271 R PDR 1

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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 95-12 FOR THE MONTH OF DECEMBER 1995 DP 0411 Rev. 6 Page 1 of 1

OPERATING DATA REPORT 4

DOCKET NO.50-271 __

DATE 960110 COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 OPERATING STATUS

1. Unit Name: Vermont Yankee I 2. Reporting Period: December
3. Licensed Thermal Power (MWt):1593
4. Nameplate Rating (Gross MWe) : Ein
5. Design Electrical Rating (Net MWe): 522
6. Maximum Dependable Capacity (Gross MWe) : .Eli
7. Maximum Dependable Capacity (Net MWe): 11.0.
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 8760.00 202344.00
12. Number Of Hours-Reactor was Critical 688 40 7618.36 167481.03
13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00
14. Hours Generator On-Line 675.07 7555.52 164251.63
15. Unit Reserve Shutdown Hours 0.00 0.00 0.00
16. Gross Thermal Energy Generated (MWH) 1066606.25 11913885.90 246082758.90
17. Gross Electrical Energy Generated 368687.00 4048155.00 82085507.00
18. Net Electrical Energy Generated (MWH) 354361.00 3858504.00 78017099.00
19. Unit Service Factor 90.74 86.25 81 12
20. Unit Availability Factor 90.74 86.25 81.17
21. Unit Capacity Factor (Using MDC Net) 93.39 _

86.70 75.80

22. Unit Capacity Factor (Using DER Net) 91.24 84.80 74.40
23. Unf.t Forced Outage Rate 9.26 0.90 4.79
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 ,

I VYDPF 0411.01 l DP 0411 Rev. 6 i Page-1 of 1 i RT No. 13.F01.19F t

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l AVERAGE DAILY UNIT POWER LEVEL l DOCKET NO. 50-271 1 UNIT Vermont Yankee DATE 960110 COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 I 1

MONTH December )

DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net)

1. 530 17. 531
2. 530 18. 531
3. 529 19. 532
4. 529 20. 530
5. 529 ._ 21. 530
6. 529 22. 531
7. 529 23. 531
8. 237 24, 530
9. 0 25, 530  !

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10. 0 26. 530
11. 220 27. 530
12. 523 28. 530 k 13. 531 29. 530
14. 531 30, 530
15. 531 31. 530 1

16, 531 1 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. j VYDPF 0411.02 DP 0411 Rev. 6 Page 1 of 1 RT No. 13.F01.18V

t UNIT SHUTDOWNS AND POWER REDUCTIONS .

REPORT MONTH DECEMBER DOCKET NO 50-271-UNIT NAME Vermont Yankee .

DATE 960110 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 95-08 951208 F 68.93 A 3 95-21 CH VALVEX Turbine trip and reactor scram, due'to malfunctioning feed-water regulator valve 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. 6 G-Operational Error (Explain)

Page 1 of 1 H- (Explain)

DOCKET NO. 50-271  !

DATE 960110 l COMPLETED BY G.A. WALLIN I TELEPHONE (802)258-5414 i

REPORT MONTH December i l

SUMMARY

OF OPERATING EXPERIENCES Hichlicht;g Vermont Yankee operated at 90.0% of rated thermal power for the month.

Gross electrical generation was 368.687 MWHe or 90.8% design electrical capacity. ,

Ooeratina 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 99.9%

of rated thermal power.

951208 At 0900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br />, initiated a power reduction to 50%, for feedwater regulator valve repair. (See Unit Shutdowns and Power Reductions)' l l

951208 At 0942 hours0.0109 days <br />0.262 hours <br />0.00156 weeks <br />3.58431e-4 months <br />, power held at 79% to investigate feedwater system l vibrations.

951208 At 1114 hours0.0129 days <br />0.309 hours <br />0.00184 weeks <br />4.23877e-4 months <br />, turbine tripped and reactor scrammed after receiving a high level signal, due to malfunctioning feedwater regulator valve.

951210 At 1850 hours0.0214 days <br />0.514 hours <br />0.00306 weeks <br />7.03925e-4 months <br />, the reactor was critical.

951211 At 0810 hours0.00938 days <br />0.225 hours <br />0.00134 weeks <br />3.08205e-4 months <br />, the turbine-generator was phasea to the grid, and a return to full power was initiated.

)

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

VYDPF 0411.04 DP 0411 Rev. 6

'Page 1 of 1 RT No. 13.F01.18X

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