VERMONT YANKEEO

NUCLEAR POWER CORPORATION

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P.O. Box 157, Governor Hunt Road

'yf y) vernon. vermont 05354-0157\

.(802) 257-7711s

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December 10, 1992VY-RCE-92-045

BVY 92-137

U.S. Nuclear Regulatory CommissionWashington, 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 VermontYankee Nuclear Power Station for the month of November 1992.

Very truly yours,

Vermont Yankee Nuclear Power Corporatio.'

Wanen P. M|urphyA|tmj)dw.-

V

Senior Vic6 Feesident, O tions

cc: USNRC, Region IUSNRC Resident Inspector, VYNPS

000 0 |9212160250 921130PDR ADOCK 0S000271 i\R PDR

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VERMONT YANKEE NUCLEAR POWER STATION

MONTHLY STATISTICAL REPORT 92-11

FOR THE MONTII OF NOVEMBER 1992

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i OPERATING- DATA REPORT:

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; DOCKET NO. 50-271- -

i DATE- 921210'

! COMPLETED BY G.A..WALLIN'

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i -TELEPHONE (802)257-7711 j

! OPERATING STATUS'

1. Unit Name: Vermont Yankee ,

I - || 2. Reporting Period: November NOTES: |

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j 3. Licensed Thermal Power (MWt) :1593

4. Nameplate Rating (Gross MWe) : 5.4_Q

j 5. Design Electrical Rating (Net MWe): 514 (oc) 504 (cc)!

} 6. Maximum Dependable Capacity (Gross MWe) : 115i

7. Maximum Dependable Capacity (Net MWe) : 124

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

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

10. keasons for restrictions, if any: N/A

! This Month Yr-to-Date Cumulative| 11. Hours in Reporting Period 720.00 8040.00 175320.00d' .2. Number Of Hours Reactor was Critical 720.00 6998.79 _ 143452.35

11 Reactor Reserve Shutdown Hours 0.00 0.00 0.00;

i -14. Hours Generator On-Line 720.00 6937.43 140510.64; 15. Unit Reserve Shutdown Hours 0.00 0.00 0.00.' '16. Gross Thermal Energy Generated (MWH) 1031273 E 10626233.50 208888771.502

| 17. Gross Electrical Energy Generated 345081.00 3525264.00 69585632.0018. Net Electrical Energy Generated (MWH) 331007.00 3350523.00 66090806.00>

; 19. Unit Service Factor 100.00 86.29 79.3720. Unit Availability Factor 100.00 86.29 79.3721. Unit Capacity Factor (Using MDC Net) 91~.22 82.68 ___ 74.08

! 22. Unit Capacity Factor (Using DER Net) 89.44- 81.08 72.6323. Unit Forced Outage Rate 0.00 0'.19 5-22.

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

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

26. Units In Test Status (prior to come.ercial operation) : N/A'

Forecast Achieved,

INITIAL CRITICALITYINITIAL ELECTRICITY-

I COMMERCIAL OPERATIONVTDPF 0411.01DP 0411 Rev. 4'

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' AVERAGE DAILY UNIT POWER LEVEL'<

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! DOCKET NO. 50-271~

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*; UNIT y_gImont Yankee*

j DATE 5 1210COMPLETED 3Y 1 A. WALLIN

; TELEPHONE 1102)257-7711:' MONTH Novemberj s

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

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j 1. 516 17, 517

: 2. 516 18. 517ii 3. 517 19. 519

| 4. 517 20. 517 '

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i 5. 517 21, 517;

I 6. 517 22, 516

| 7. 518 23, 5161-; 8. 293 24, 517.

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{ 9. 370 25. 517|-! 10. 175 26. 5171-

| 11, 177_. 27. 517-i

i 12. 183 28. 517!

! 13. __, 227 29. 517i! 14. _ 479 .3 0. 517i

. 15. 515 31. ---

16. 517

j INSTRUCTIONS:.

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

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r megawatt.!

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UNIT SHUTDOWNS AND POWER REDUCTIONS .

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REPORT MONTH NOVEMBER DOCKET NO 50-271 .

UNIT NAME Vermont Yankch*DATE 921210

COMPLETED BY G.A. WallinTELEPHONE (802)257-7711

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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 RecurrenceReactor

92-08 921108 F 0.00 A 4 N/A CB ELECON "A" recirculation pumpPower trip due to MG set

Reduction excitation circuitrymalfunction

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92-09 921109 F 0.00 A 4 N/A CB ELECON "A" recirculation pumpPower trip due to MG set

Reduction excitation circuitrymalfunction

1 F: Forced 2 Reason: 3 Method: 4 Exhibit G- InstructionsS: Scheduled A-Equipment Failure (Explain) 1 - Manual for Preparation of Data

B-Maintenance or Test 2 - Manual Scram Entry Sheets for LicenseC-Refueling 3 - Automatic Scram Event Report (LER) FileD-Regulatory Restriction 4 - Other (Explain) (h"JREG 0161)E-Opera *.or Training and-

License Examination 5 Exhibit I - Same SourceVYDPF 0411.03 F- Administrat.ive,

DP 0411 Rev. 4 G-Operational Error (Explain)Page 1 of 1 H-(Explain) - ,

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"DOCKET NO. 50-271

DATE 9_212103 ,

COMPLETED BY G.A. WALLIN4

TELEPHONE 1802)257-7711.

i REPORT MONTH November

i$ SUMMARY OF OPERATING EXPERIENCES

i Highlightg

|- Vermont Yankee operated at 89.9% of rated therms tower for the month..8% design electricalj Gross electrical generation was 345.081 MWHe r i

; capacity.i

| Ooeratina Summarv!

The following is a chronological description of plant operations including'

other pertinent items of interest for the month:

I the beginning of the reporting period the plant was operating at 99.8%at

; of rated thermal pcwer,iI 921108 At 0424 hours, the "A" recirculation pump tripped due to a MG set; excitation circuitry malfunction. (See Unit Shutdowns and Powerj. Reductions)| 921108 At 1233 houra, started the "A" recirculation-pump and began a1 return to full power.! 921109 At 1428 hours, the "A" recirculation Innnp tripped due to a MG set, excitation circuitry malfunction. (See Unit Shutdowns and Power .

! Reductions)[ 921113 At 1130 hours, started the "A" tecirculation pump and began a

return to full power.>

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;- At-the end of the reporting period the plant was operating at 99.9% of--;- rated thermal power.1

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