ML20087C108

Monthly Operating Rept for Dec 1991 for Vermont Yankee Nuclear Power Station

ML20087C108
Person / Time
Site:	Vermont Yankee
Issue date:	12/31/1991
From:	Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-92-02, BVY-92-2, VY-RCE-92-001, VY-RCE-92-1, NUDOCS 9201140077
Download: ML20087C108 (6)

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' VERMONT YANKEE r

NUCLEAR POWER CORPORATION p  ;

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'-[h,~ P.O. Box 157. Governor Hunt Road I,

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Vernon, Vermont 05354-0157 (802) 257-7711 k*j, i

• January 10, 1992 VY-P.CE-92-001 BVY 92-02  :

l U.S. Nuclear Regulatory Commission-

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' ATTN: Oncument Control Desk washington, D.C. 20555 i r>O.r Sir:

p Submitted herewith-is the Monthly Statistical Report for the vermont Yankee Nuclesr Power Station for the month of December, 1993.

Very truly yours, '

j. VERMONT YANKEF. NUCLEAR-POWER CORP.

%[ 4'7, _

WarrenVid.

Senior P /Murph'v /

e Presid , Operations cc: 1) USNRC Region I 475 Allendale Road King of Prussia, PA 19406 I

2) USNRC Resident Inspector, VYNPS DP 0411 Rev 4 Page 1 of 1 t

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7201140077. 911231 "

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i VERMONT YANKEE NUCLEAR POWER STATION t

MONTHLY STATISTICAL REPORT 91-12 FOR THE MONTH OF DECEMBER, 1991 t-DP-3411 Rev. 4 Page:1 of 1 1

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OPERATING DATA-REPORT

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• DOCKET NO.- 50-A71-DATE 920110 _

COMPLETED BY G.A. WALLIN TELEP!'ONE (802)257-7711 2PERATING STl1MH i

1. Unit Name: Vermont Yankee

2. Reporting Period: December _ NOTES:

3. Licensed Thermal Power (MWt):1121

4. Nameplate Rating (Gross MWe): 112

5. Design Electrical Rating (Not MWe): 514(oci 504(cci

6. Maximum Dependable Capacity (Gross MWe): Elh

7. Maximum Dependable Capacity (Not MWe): E21

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

N/A

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 167280.00

12. Number Of Hours Reactor was Critical 744.00 8264.93 -136453.56

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 7'4.00 8201.61 133577.21

15. Unit Reserve Shutdown Hours 0.00 0 . 0 0 __ 0.00

16. Gross Thermal Energy Generated (MWH) 1177118.50 12947233.00 298262538.00

17. Gross Electrical Energy Generated 396561.00 4312873.00 _g.6060368.00

18. Net Electrical Energy Generated (MWH)- 380563.00 4108313.00 -62740283.00

19. Unit Service Factor 100.00 93.63- 79.04

20. Unit Availability Factor 100.00 93.63 79.04

21. Unit Capacity Factor (Using MDC Net) 101.49 93.06- 73.67

22. Unit Capacity Factor (Using DER Not)' 99.52 91.24 72.23

23. Unit Forced Outage Rate _

O.00 4.d8 5.47

24. Shutdowns scheduled over next-6 months (Type,-Date, and Duration of Each: _1991 Refuelina Outaae scheduled to t on March 7. 1992 and-last for a six week neriod.

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 DP 0411 Rev. 4 Page 1 of.1 RT No. 13.F01.19F

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AVERAGE DRILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT y_ermont Yankee

, DATE 920110 l

COMPLETED BY G.A. WALLIN TELEPHONE (802)257-7711 l

MONTH December DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL

(MWe-Net) (MWe-Net)

, 1. 514 17. 57 5 l

2. 515 18. 514

3. 515 19. 429

4. 515 20. 503

5. 514 21, 515

6. 515 22, 515

7. 514 23. 516

8. 515 24, 515

9. 515 25, 515 l

lo. 515 26, 514'

11. 515 27, 515 12, 515_ 28, 515

13. 515 29. __ 514 l 14, 515 30, 514 l

15, 523 31. 515 16, 515 INT' RUCTIONS:

On this format, list the average daily unit power 1.evel in MWE-Net for each day in the reporting month. Compute to the' nearest whole megawatt.

VYDPF 0411.02 i DP 0411 Rev. 4 l Fage 1 of 1 l

RT No. 13.F01.18V

UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT FONTH DECEMBER DOCKET NO 5_0-271 ,

UNIT NAME Vermont Yankee '

DATE 920110 COMPLETED BY G.A. Wallin TELEPHONE (8021257-7711 1 2 3 No. Date Type Duration Reason Method of License System Component Cause and Corrective (hours) Shutting Event Code Code Action to Prevent Down Report # 4 5 Recurrence l Reactor i 1

91-12 911219 S 0.00 B 4 N/A HE PIPEXX Repairs to Bypass Valve Power Stem Leak-off line.  ;

Reduction l 1 F: Forced 2 Reason:' 3 Method: 4 Exhibit G- Instructions S: Scheduled A-Equipment Failure -(Explain) l'- 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. 4 G-Operational Error (Explain)

'Page 1 of 1 H-(Explain) i 1

. . . , , W DOCKET NO. 50-271 DATE 920110 COMPLETED BY G.A. WALLJN TELEPHONE (8021257-7711 REPORT MONTl! DECEMBER SJJMMABY OF OPERATING ExEJ:RIENCES liighligbis Vermont Yankee operated at 99.3% of rated thermal power for the month.

Gross electrical generation was 396.56_1 MWHe or 98,71 design electrical capacity.

Op_qratino 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 11.ull of rated thermal power.

911219 At 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br />, initiated a power reduction to 69% for repairs to the bypaos valve stem leak-off line.

911219 At 2330 hours0.027 days <br />0.647 hours <br />0.00385 weeks <br />8.86565e-4 months <br />, completed repairs to the bypass valve stem leak-off line and initiated 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 DP 0411 Rev. 4 Page 1 of 1 RT No. 13.F01.18X 7