ML20093L322

Monthly Operating Rept for Sept 1984

ML20093L322
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	09/30/1984
From:	Burger F, Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
VYV-84-500, NUDOCS 8410180495
Download: ML20093L322 (7)

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VERMONT YAf4(EE NUCLEAR POWER STATION i

i MONTHLY STATISTICAL REPORT 84-09 4

FOR THE. K) NTH OF SEPTEMBER,1984 4

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OPERATING DATA REPORT Docket No.

50-271 Date 841010 Completed by FJ Burger Telephone (802)257-7711 i

OPERATING STATUS Notes:

1.

Unit Names Vermont Yankee 2.

Reporting Periode September 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 720.00 6,575.00

12. MJmber of Hours Reactor was Critical 463.00 4,929.16 84,627.81

13. Reactor Reserie Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 435.83 4,761.84 82,254.42

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 588,189.50 7054,498.00 119,215,177.50

17. Gross Electrical Energy Generated (MWH) 190,453.00 2368,314.00 39,661,392.00

18. Net Electrical Energy Generated (MWH) 177,944.00 2259,680.00 37,624,696.00

19. Unit Service Factor 60.53 72.42 78.01

20. Unit Availability Factor 60.53 72.42 78.01

21. Unit Capacity Factor (using K)C Net) 49.04 68.19 70.80

22. Unit Capacity Factor (using DER Net) 48.08 66.86 69.43

23. Unit Forced Outage Rate 39.47 9.87 7.52

24. Shutdowns scheduled over next 6 months (Type, Date and Duration of Each):

N/A I

25. If shut down at end of report period, estimated date of startup:

10/1/84

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

Forecast Achieved Initial Criticality Initial Electricity Commercial Operation MSR.F1

..;4 AVERAGE DAILY UNIT POWER LEVEL Docket No.

50-271 Unit Vermont Yankee Date 841010 Completed by F.J. Burger Telephone (802) 257-7711 Month September DAY AVERAGE DAILY POWER LEVEL' DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 385 17 466 2

382 18 59 2

3 385 19 0

4 386 20 0

5 364 21 0

6 424 22 0

7 423 23 0

8 424 24 0

9 420 25 0

10 426 26 0

l 11 465 27 0

12 464 28 0

13 465 29 10 14 460 30 93 15 466 31 i

16 447 i

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

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Unit Vsrmont Yankee UNIT SHUTDOWNS AND POWER REDUCTIONS Date 841010 Completed by F.J. Burger REPORT MONTH 5eptember Telephone (802) 257-7711 1

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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 #

84-15 840905 S

0 8

4 - power N/A R8 CONR00 Power reduction for control rod reduction pattern adjustment + other surveillance.

84-16 840918 F

275.17 H

1 LER 84-21 RA XXXXXX Plant shutdown to investigate anc correct steam carry-under caused by untightened moisture separator in the reactor vessel. beparator was re-installed cnd controlling procedures changed to prevent re-occurence.

84-17 840930 F

9.0 A

1 N/A CD VALV0P Plant shutdown to investigate anc repair slow MSIV closing time caused by galled guide rods on valve actuator.

The actuator was rebuilt and returned to service.

1 2

3 4

F-Forced A-Equipment Failure (Explain)

Methods exhibit G - 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-Operator Training and License Examination 4-Other (Explain)

F-Administrative 5

G-Operational Error (Explain)

Exhibit I - Same Source

Dock:t No.

50-271 Unit Vnrmont Yankee Date 841010 Completed by F.J. Burger SAFETY-RELATED MAINTENANCE Telephone (802) 257-7711 EQUIPMENT NATURE OF LER OR OUTAGE MALFUNCTION CORRECTIVE ACTION MAINTENANCE NUMBER CAUSE RESULT RCIC Valve, V13-15 Corrective No Position Position Inoication MR84-1704 LER 84-20 Failed Relay Indication Replaced Relay Corrective tf'Ci Valve, v23-14 MR84-1743 N/A Cracked Seat Seat Leakage Replaced Wedge and sten Corrective Copper Degraded Replaced Affected Main Station Battery MR84-1776 N/A Contamination Cells Cells MSIV, V2-800 Corrective N/A Spring Plate Bounc Slow Closure Replaced Parts Actuator MR84-1851 up on Guide Rods Time I

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Docket No. 50-271

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Unit Vermont Yankee f

Date 841010 Completed by F.J. Burger Telephone (802) 257-7711 REPORT K) NTH September SUDNARY OF OPERATIMI EXPERIENCES Highliahts Vermont Yankee operated at 51.28% of rated thermal power for the month.

Gross electrical generation was 190,453 MWH or 48.98% of design e

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 80%

capacity due to an inoperable condensate pump.

840905 At 1000 hrs, initiated power reduction for a control rod pattern exchange and other surveillance.

840905 At 1447 hrs, started a return to 80% power.

840910 At 1230 hrs, condensate pump returned to service, started increasing power.

840911 At 0600 hrs, power level held at 95% due to steam carry-under in the reactor vessel.

840918 At 0200 hrs, commenced a reactor shutdown to investigate and correct carry-under.

840918 At 0518 brs, the generator was removed from the grid.

840929 At 0114 hrs, commenced a reactor startup.

840929 At 1628 hrs, the generator was phased to the grid.

840930 At 1330 hrs, comenced a plant shutdown to investigate MSIV timing problems.

840930 At 1500 hrs, the generator was removed from the grid.

At the end of the reporting period the plant was shutdown.

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VERMONT YANKEE NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR IIUNT ROAD VERNON, VERMONT 05354 VYV 84-500 October 10, 1984-U. S. 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 September, 1984.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION "y{

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Warren P. Murphy Vice President and Manager of Operations WPM /FJ8/jb/kSR1.1 d

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