ML20070R608

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Monthly Operating Rept for Apr 1994 for Vermont Yankee Nuclear Power Station
ML20070R608
Person / Time
Site: Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date: 04/30/1994
From: Reid D, Wallin G
VERMONT YANKEE NUCLEAR POWER CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-94-50, VY-RCE-94-012, VY-RCE-94-12, NUDOCS 9405200290
Download: ML20070R608 (6)
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, VERMONT YANKEE

. NUCLEIR POWER CORPORATION

  • MD. P.O. Box 157, Governor Hunt Road W vernon, vermont 05354-0157 Yq 'N / ') / (802) 257-7711

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,s May 10,1994 VY-RCE-94-012 BVY 94-50 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attn: Document Control Desk

Reference:

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

Dear Sir:

Submitted herewith is the Monthly Statistical Report for the Vennont i

Yankee Nuclear Power Station for the month of April.1994.

Very truly yours, 2

Vennont Yankee Nuclear Power Corp.

N V-y i.

1-Donald A. Reid Vice President, Operations cc: USNRC, Region I USNRC Resident inspector, VYNPS

.c 9405200290 940430 PDR ADOCK 05000271 - l#

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VERMONT YANKEE NUCLEAR POWER STATION MONTIIIJ STATISTICAL REPOl(T 94-04 FOlt TIIE MONTil OF APRIL 1994 DP 0411 Rev. 5 Page 1 ofI

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, OPERATING DATA REPORT F

DOCKET NO 50-271 DATE 940510 COMPLETED BY G.A. WALLIN

TELEPHONE (802)257-7711 OPERATTELETATHS
1. Unit Name: yfrmont YalDlLQ2
2. Reporting Period: April NOTES:
3. Licensed Thermal Power (MWt):1593

, 4. Nameplate Rating (Gross MWe) : 51Q

5. Design Electrical Rating (Net MWe) : 114 (oc) 504(cc)
6. Maximum Dependable Capacity (Gross MWe) : 111 l

7.-Maximum Dependable Capacity (Net MWe): 1Q4

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

N/A t

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 719.00 2879.00 187703.00 a 12. Number Of Hours Reactor was Critical 678.12 2838.12 154055.53
13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00
14. Hours Generator On-Line 667.82 2822 17

. 150937.79

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00
16. Gross Thermal Energy Generated (MWH) 1955857.00_ 4455498.00 225161169.50 17 Gross Electrical Energy Generated 357363.00 1509118.00 75028500.00 '

i 18. Net Electrical Energy Generated (MWH) 343697.00 _1451057.00 71298081.00

19. Unit Service Factor 92.88 98.03 79 62

'2 0. Unit Availability Factor 92.88 98.03 79.69

21. Unit Capacity Factor (Using MDC Net) 94.85 100.00 74.69
22. Unit Capacity Factor (UJing DER Net) 133.00 98.06 73.23
23. Unit Forced Outage Rate 7.12 1.97- 5.12
24. Shutdowns scheduled over next 6 months (Type, Date, and Duration of 4

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 l INITIAL ELECTRICITY l COMMERCIAL OPERATION VYDPF 0411.01 DP 0411 Rev. 5 Page 1 of 1 RT No. 13.F01.19F 1

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)

.' AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-'271 UNIT Vermont Yankee DATE 240510 COMPLETED BY G.A. WALLIN TELEPHONE _(802)257-7711 MONTH Apr,il__ l i

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

1. 519 17, 520
2. 519 18. 520
  • 3. 496 19. 520 I
4. 518 20. 520
5. 518 21. 520

. 6. 517 22. 520

7. 517 23. 520
8. 51.& 24. 519 i
9. 518 25. 520
10. 29 26. 519
11. 0 27, 520 1
12. 308 28. 519 1

l 13, 516 29. 518  !

I

! 14, 518 30. 519 l l

15. 520 31. ---

16, 52.0 *23 hour day 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. ,

l VYDPF 0411.02 '

l DP 0411 Rev. 5 Page 1 of 1 RT No. 13 F01.18V 1

I

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, - l UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH APRIL DOCKET NO 50-271 -

f UNIT NAME Vermont Yankee F 4

DATE 940510 1

COMPLETED BY G.A. Wallin TELEPHONE (802)257-7711 '

1 2 3 4 5 ,

4 No. Date Type Duration Reason Method of License System Component Cause and Corrective E

! (hours) Shutting Event Code Code Action to Prevent i Down Report # Recurrence

  • Reactor >

94-04 940410 F 51.18 A 3 94-04 HA VALVEX "C" moisuture separator high level.

i Turbine tripped and j a reactor scram.

I Replaced a faulty level cont]oller.

1 F: Forced 2 Reason: 3 Method: 4 Exhibit G- Jnstructions

, S: Scheduled A-Equipment Failure (Explain) 1 - Manual for Preparacion of Data ,

B-Maintenance or Test 2 - Manual Scram Entry Sheets for License j C-Refueling 3 - Automatic Scram Event Report (LER) File D-Regulatory. Restriction 4 - Other (Explain) (NUREG 0161)

E-Operator Training and l License Examination 5 Exhibit I - Same Source

.VYDPF 0411.03 F-Administrative.  ;
DP 0411 Rev. 5 G-Operational Error (Explain) f Page 1 of 1 H-(Explain) s i

1

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'.' DOCKET'NO. 50-271 l d

.DATE 230510 l

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

[ REPORT MONTH April

- SJJMMARY OF OPEBATING EXPEFJEE.CfES Highlighte Vermont Yankee operated at 92.2% of rated thermal power for the' month.

' Gross electrical generation was 357.363 MWHe or 92.0% design electrical

capacity.

i Operating Summary i

-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.

940410 At 0122 hours0.00141 days <br />0.0339 hours <br />2.017196e-4 weeks <br />4.6421e-5 months <br />, turbine tripped and reactor scrammed, caused by a 4

high level signal in the "C" moisture separator. (See Unit Shutdowns and Power Reductions) 940411 At 1815 hours0.021 days <br />0.504 hours <br />0.003 weeks <br />6.906075e-4 months <br />, the reactor was critical following repairs; 940412 At 0433 hours0.00501 days <br />0.12 hours <br />7.159392e-4 weeks <br />1.647565e-4 months <br />, the turbine-generator was phased to the grid, and 3

a return to full power was initiated.

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. i At the end of the reporting period the plant was operating at 99.9% of.

rated thermal power.

VYDPF 0411.-04 DP 0411 Rev. 5 )

Page 1 of 1 l RT No. 13.F01.18X I

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