ML20077Q481

Monthly Operating Rept for Aug 1983

ML20077Q481
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	09/09/1983
From:	Burger F, Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
VYV-83-172, NUDOCS 8309160126
Download: ML20077Q481 (8)

Text

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VERMONT YANKEE NUCLEAR POWER CORPORATION D

P. O. BOX 157 GOVERNOR IIUNT ROAD VERNON, VEIGIONT 05354 VYV 83-172 September 9.1983 United States Nuclear Regulatory Commission Director, Office of Management Information and Program Control Washington, D.C. 20555

Dear Sir:

Submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of August,1983.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION a/

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W. Mu ph Vice President anager of Operations FJB:jbm e

Y' 8309160126 B30909 PDR ADOCK 05000271 R

PDR

VERMONT YANKEE NUCLEAR POWER STATION MONTIILY STATISTICAL REPORT 83-08 FOR TIIE MONTil OF AUGUST,1983 i

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• 0PERATING DATA BEPORT DOCKET NO. 50-271 DATE 830909 COMPLETED BY F.J. Burr;er TELEPHONE (802) 257-7711 ext. 136 OPERATING STATUS

1. Unit Name:

Vermont Yankee

2. Reporting Period:

August

3. Licensed Thermal Power (MWt): 1593

4. Nameplate Rating (Gross MWe):

540

5. Design Electrical Rating (Net MWe):

514(OC) 504(CC)

6. Maximum Dependable Capacity (Gross MWe):

535

7. Maximum' Dependable Capacity (Net MWe):

504

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 l

This Month Yr-to-Date Cumulative

11. Hours In Reporting Period 744.00 5,831.00

12. Number Of Hours Reactor Was Critical 713.22 3,226.66 76,769.65

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 708.62 3.143.89 74,563.58

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 1,090,008,00 4,515,783.00 107,555,025.50

17. Gross Electrical Energy Generated (MWH) 353,561.00 1,486,726.00 35,747,873.00

18. Net Electrical Energy Generated (MWH) 331,333.00 1,405,062.00 33,895,603.00

19. Unit Service Factor 95.24 53.92 77.73

20. Unit Availability Factor 95.24 53.92 77.73

21. Unit Capacity Factor (Using MDC Net) 88.36 47.81 70.11

22. Unit Capacity Factor (Using DER Net) 86.64 46.88 68.74

.23. Unit Forced Outage Rate 4.76 29.57 7.64

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:

26. Units In Test Status (Prior to Commercial Operation):

Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

• Julp 1983 0$eratins Data _ Resort was in error.

A revised re@ ort for Julp__is attached.

OPERATING DATA REPORT DOCKET NO.

50-271 DATE 830909 COMPLETED BY F_.T. Honrer TELEPHONE (Rn9) 957-7711 ext.136 OPERATING STATUS Notes

1. Unit Name: -

Vermont Yankee

2. Reporting Period:

July

3. Licensed Thermal Power (MWt):

1593

4. Nameplate Rating (Gross MWe):

540

5. Design Electrical Rating (Net MWe): 51403C) 504 OJC)

6. Nbximum Dependable Capacity (Gross MWe):

535

7. Maximum Dependable Capacity (Net MWe):

504

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 5,087.00

12. Number Of Hours Reactor Was Critical 744.00 2,513.44 76,056.43

13. Reactor Peservc Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 744.00 2,435.27 73,854.96

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Cross Thermal Energy Generated (MWH) 1.172.967.50 3.425.775.00 106,465,017.50

17. Cross Electrical Energy Generated (MWH) 384,428.00 1,133,165.00 35.394.312.00

• 18. Net Electrical Energy Generated (MWH) 360.807.00 1.073.729.00 33,564.270.00

19. Unit Service Factor 100.00 47'.87 77.59

20. Unit Availability Factor 100.00 47.87 77.59

21. Unit Capacity Factor (Using MDC Net) 96.22 41.88 69.96

22. Unit Capacity Factor (Using DER Net) 94.35 41.06 68.60

23. Unit Forced Outage Rate 0.00 36 54 7.67

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:

26. Units In Test Status (Prior to Commercial Operation):

Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

• Item 18 was 720 MWH Low due to a recording error.

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-271 UNIT Vermont Yankee DATE 830909 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext.136 I

5 MONTH August DAY AVERAGE DAILY POWER LEVEL' DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1.

481 17.

483 2.

482 18.

484 3.

485 19.

483 i

4.

484 20.

482

.5.

482 21.

482 6.

481 22.

489 o

7.

473 23.

488 l

8.

483 24.

489 9.

483 25.

4an l

lo.

488 26.

482 i

11.

490 27.

8 12.

465 28.

133 l

l 13.

323 29.

369 14.

432 30.

454 15.

489 31.

482 l

16.

487 l

l 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, i

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UNIT SliUTDOWNS AND POWER REDUCTIONS

-DOCKET NO 50-271 UNIT NAME Vermont Yankee DATE 830909 REPORT MONTli August COMPLETED BY F.J. Hurger TELEP110NE (802) 257-77'.1 ext.136 a

cm m Su a

00 "a d3 License a

@n Cause & Corrective No.

Date m

E.

NE E

3UN Event 0$

Action to N

$6 E

d.E $

Report #

EO 8"O Prevent Recurrence o

M em m

g o

E 83-07 830812 S

0 B

4 N/A RB CONROD Power reduction for control rod pattern (Pwr Red) exchange.

83-08 830826 F

35.38 A

3 N/A IIE PIPEXX Plant shutdown to repair a steam leak in a 2 inch main turbine bypass valve sealing steam supply line.

3,

' F: Forced Reason:

Method:

Exhibit C-Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Other (Explain)

(NUREC 0161)

E-Operator Training & Licen.u.. Examination F-Administrative 5 Exhibit I - Same Source G-Operational Error (Explain)

II-Other (Explain) 7/80

DOCKET NO.

50-271 UNIT Vermont Yankee DATE 830909 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711, ext.136 SAFETY RELATED MAINTENANCE NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION IIPCI Turbine Corrective LER Worn Parts in Turbine Trips Replaced Parts MR 83-1489 83-18/3L llydraulic Trip Unit Core Spray Valve Corrective LER Unknown Breaker Trips Replaced Breaker V14-7B Circuit Breaker MR 83-1598 83-20/IP "B" Diesel Generator Corrective LER Worn Parts Slow Starting Replaced Starting Relay MR 83-1597 83-20/IP Drywell fligh Pressure Corrective LER Set Point Drift Trip Point Out Replaced Trip Unit

Transmitter PT-10-101D MR 83-1640 83-21/3L of Spec. Ifigh I

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DOCKET NO.

50-271 UNIT Vermont Yankee

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DATE 830909 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext.136 REPORT MONTH August

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 91.97% of rated thermal power for the month.

Gross electrical generation was 353,561 MWH or 88.0%of 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 99.8% of rated thermal ' power.

830812 At 2130 hours0.0247 days <br />0.592 hours <br />0.00352 weeks <br />8.10465e-4 months <br />, a power reduction was initiated for a c.ontrol rod pattern exchange.

830813 At 0036 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />, a return to full power was started.

830826 At 2145 hours0.0248 days <br />0.596 hours <br />0.00355 weeks <br />8.161725e-4 months <br />, a reactor shutdown was initiated to repair a steam leak in the main turbine bypass valves sealing steam supply line.

830827 At 0039 hours4.513889e-4 days <br />0.0108 hours <br />6.448413e-5 weeks <br />1.48395e-5 months <br />, the reactor auto scrammed on high vessellevel due to an operator error when switching from auto to manual feedwater control.

830828 At 0728 the reactor was critical.

830828 At 1243 hours0.0144 days <br />0.345 hours <br />0.00206 weeks <br />4.729615e-4 months <br />, the turbine generator was phased to the grid.

At the end of the reporting period the plant was operating at 99.8% of rated thermal power.

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