ML20098D780

Monthly Statistical Rept for Aug 1984

ML20098D780
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	08/31/1984
From:	Burger F, Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
VYV-84-444, NUDOCS 8409270746
Download: ML20098D780 (7)

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l VERMONT YAtKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 84-08 FOR THE MONT4 0F AUGUST, 1984 8409270746 840831 PDR ADOCK 05000271 R

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OPERATING OATA REPORT Docket No. 50-271 Date 840910 Completed by F.J. Burcer Telephone (802) 257-7711 OPERATING STATUS Notes.

1.

Unit Name.

Vermont Yankee 2.

Reporting Ferloo.

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 This month Yr-to-Date Cumulative

11. Hours in Reporting Period 744.00 5855.00

12. Number of Hours Reactor was Critical 579.75 4466.16 84,164.81

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 471.82 4326.01 81,818.59

15. Unit Rcserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 533,537.00 6466308.50 118626988.00

17. Gross Electrical Energy Generated (MWH) 165,593.00 2177861.00 39470939.00

18. Net Electrical Energy Generated (MWH) 152,946.00 2081736.00 37446752.00

19. Unit Service Factor 63.42 73.89 78. 13

20. Un!t Availability Factor 63.42 73.89 78.13

21. Unit Capacity Factor (using MDC Net)

40. 79 70.55 70.9 5

22. Unit Capacity Factor (using DER Net) 39.99 69.1/

69.57

23. Unit Forced Outage Rate 15.53 5.20 7.26

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 j

26. Units in Test Status (prior to commercial operation),

Forecast Achieved j

Initial Criticality Initial Electricity Commercial Operation MSR.F1 L

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AVERAGE DAILY UNIT POWER LEVEL Docket No.

50-271' Unit Vermont Yankee Date 840910 Completed by F.J. Buraer Telephone (802) 257-7711 Month AUGUST DAY AVERAGE DAILY POWER LEVEL DAY AVER!CE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 0

17 327 2

0 18 356 3

0 19 351 4

0 20 366

-4 5

0 21 385

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0 23 380 8

21 24 382 i-9 63 25 383 10 0

26 379 l

11 0

27 382 1

12 148 28 379 13 285 29 377 14 90 30 377 15 5

31 380 16 172 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.

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Dock t No.

50-271 Unit Vermont Yankee UNIT SHUTDOWNS AND POWER REQUCTIONS Date 840910 Completed by F.J. Burger REPORT MONTH AUGUST Telephone (802) 257-7711 1

2 3

4 5

No.

Date Type Duration Reason Method of License System Component Cause and Corrective Action to (hours)

Shutting Down Event Code Code Prevent Recurrence Reactor Report

• 84-12 840801 S

185.42 C

1 N/A N/A N/A Refueling outage continued (cont]

84-13 840809 F

55.63 A

1 N/A CD ELECON Loss of MSIV position indication caused by failure of recently installed connectors. Connectors were replaced.

84-14 840814 F

31.13 A

1 N/A HC HT EXCH High reactor coolant conductivity caused by main condenser tube leakage. Failed tubes were plugged.

k-Forced k-EquipmentFailure(Explain) hethod.

kxhibitG-Instructions S-Scheduled B-Maintenance or Test 1-Manual for Preparation of Data Entry C-Refueling 2-Manual Scram Sheets for Licensee Event D-Regulatory Restriction 3-Automatic Scram Report (LER) File (NUREG 0161)

E-Uperator Training and License Examination 4-Other (Explain)

F-Administrative 5

G-Operational Error (Explain)

Exhibit I - Same Source H-Other (Explain)

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Dockr,t No. 50-271 Unit Vermont vanxee Date 840910 Completed by F.J. Burger Telephone (802) 257-7711 REPORT MONTH AUGUST SLM MRY OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 45.0 % of rated thermal power for the month.

Gross electrical generation was 165,593 MWHe or 41.2 % of design electrical capacity.

Operatino 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 shut down for refueling.

840806 At 0320 hrs, commenced a reactor startup.

840806 At 0510 hrs, the reactor was critical.

840808 At 0252 hrs, the generator was phased to the grid.

840808 At 1010 hrs, the generator was removed from the grid for overspeed testing and balancing.

840808 At 1658 hrs, the generator was phased to the grid.

840808 At 1733 hrs, the generator was removed from the grid for balancing.

840809 At 0118 hrs, the generator was phased to the grid.

840809 At 2216 hrs, the generator was removed from the grid and the reactor shut down because the inboard main steam isolation valve indication was inoperable.

840811 At 1525 hrs, a reactor startup was initiated.

840811 At 1635 hrs, the reactor was critical.

840812 At 0554 hrs, the generator was phased to the grid.

840813 At 1730 hrs, power was reduced because of the high conductivity of the reactor coolant.

840814 At 1232 hr1, the generator was removed from the grid.

840815 At 1940 hrs, the generator was phased to the grid and a power ascension started.

At the end of the reporting period, the plant was maintaining 80% power because of the loss of a main condensate pump.

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VERhiONT YANKEE NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR llUNT ROAD VERNON, VERMONT 05354 VYV 84-444 September 11, 1984 U. S. Nuclear Regulatory Commission Director, Offica of Management Information and Program Control Washington, D.C.

20555

Dear Sir:

Submitted herewith is the Monthly Statistical Raport for the Vermont Yankee Nuclear Power Station for the month of August,1984.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION W

Warren P.

urphy Vice Pre ident and Manager of Operations WPM /FJ8/jbA4SR1.1 r E-24 ll: