ML20099H055

Monthly Operating Rept for Oct 1984

ML20099H055
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	10/31/1984
From:	Burger F, Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
VYV-84-562, NUDOCS 8411280010
Download: ML20099H055 (7)

Text

m-VERMONT YAtKEE MJCLEAR POWER STATION MONTHLY STATISTICAL REPORT 84-10 FOR THE MONTH OF OCTOBER,1984 p'

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OPEM TING DATA REPORT Docket No.

50-r..

Date 841110 Completed by F.J. Burger Telephone (802) 257-7711_

OPERATING STATUS Notes:

1.

Unit Name:

Vermont Yankee

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2.

Reporting Period:

October 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 1

9.

Power level to which restricted,Lif any (Net MWe):

N/A

10. Reasons for restrictions, if any:

N/A This month Yr-to-Date Cumulative

11. Hours in Reporting Period 745.00 7320.00

12. Number of Hours Reactor was Critical 722.12 5651.28 85349.93

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 711.65 5473.49 82966.0/

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 1041181.00 8095679.00 120256358.50

17. Gross Electrical Energy Generated (MWH) 346564.00 2714878.00 40007956.00

18. Net Electrical Energy Generated (MWH) 326312.00 2585992.00 37951008.00

19. Unit Service Factor 95.52 74.77 78.14

20. Unit Availability Factor 95.52 74.77 78.14

21. Unit Capacity Factor (using MDC Net) 86.91-70.09 70.9 2

22. Unit Capacity Factor (using DER Net) 85.21 68.73 69.54

23. Unit Forced Outage Rate 4.48 9.2C 7.50 i

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

None

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

N/A

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

Forecast Achieved Initial Criticality Initial Electricity Commercial Operation MSR.F1

' AVERAGE DAILY-UNIT POWER LEVEL-

- Docket No. 50-271 Unit Vermont Yankee Date 841110

. Completed by F.J. Burger Telephone-(802) 257-7711 MONTH October DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 0

17 509 2

157 18 510 3

395 19 509 4

459 20 508 5

49 6 21 502 6

499 22 509 7

489 23 314 8

49 4 24 210 3

t 9

49 2 25 387 10 474 26 364 I

11 491 27 350 i

12 490 28 442 (25 br. day)

I 13 492 29 507 14 487 30 512 15 509 31 512 l

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i INSTRUCTIONS:

On this format, list the average daily unit power level in MWe-Net for each day i.

In the reporting month. Compute to the nearest whole megawatt.

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Docket No. 50-271 Unit vermont Yankee INIT SHUTDOWNS AND POWER REDUCTIONS Date 841110 Completed by F.J. Burger REPORT MONTH October Telephone (802) 257-7711 1

2 3

4 5

No.

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

Shutting Down Event Code Code Prevent Recurrenc3 Reactor Report #

84-17 840930 F

33.35 A

1 N/A CD VALV0P Plant shutdown due to slow-(cont)

MSIV closing times caused by galled guide rods on valve actuator. The actuator was re-built and returned to service.

84-18 841023 F

0 A

4 LER EE RELAYX Commenced shutdown because both Power 84-22 emergency diesel generators were Reduction out of service due to failed dif-ferential relays. Relays were repaired and returned to service.

Shutdown terminated.

84-19 941026 F

0 4

4 N/A RB CONROD Power reduction for control rod Power pattern adjustment and other Reduction testing r

1 2

3 4

F-Forced A-Equipment Failure (Explain)

Method 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-uperator Training and License Examination 4-Other (Explain)

F-Administrative 5

G-Operational Error (Explain)

Exhibit I - Same Source H-Other (Explain)

MSR.F3

DockLt No. 50-271 Unit V"rmont Yankee Date 841110 Completed by F.J. Burger-l SAFETY-RELATED MAINTENANCE Telephone (802) 257-7711-EQUIPMENT NATURE OF LER OR OUTAGE MALFUNCTION CORRECTIVE ACTION-MAINTENANCE NUMBER CAUSE RESULT A Diesel Generator Corrective N/A Differential Relay Differential Relay Replaced diode Lockout Circuit MR 84-1968 Diode failure tripped lockout.

Diesel inop.

8 Diesel Generator Corrective LER*

Differential Relay Differential Relay Replaced diode Lockout Circuit

>ft 84-1970 84-22 Diode failure tripped lockout.

Diesel inop.

• Both diesels inop. at the same, time t

9 M5R.F4

Docket No. 50-271 a,-

Unit-Vermont Yankee Date 841110

-Completed by F.J. Burger Telephone (802)257-7711 REPORT MONTH October

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 87.7% of rated thermal power for the month. Gross electrical generation was 346564 MWH or 86.1 % of design electrical e

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 shut down to repair a MSIV valve actuator.

841001 At 2253 hrs. the reactor was critical.

841002 At 0921 hrs. the turbine generator was phased to the grid.

841023 At 0140 hrs. commenced a plant shutdown due to both emergency diesels being out of service.

j 841023 At 1820 hrs. required repairs were completed and a power ascension was initiated.

841026 At 1143 hrs. a power reduction waa initiated for a control rod pattern adjustment and other testing.

4 841026 At 1930 hrs. a return to full power was initiated.

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

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- VERMONT YANKEE NUCLEAR POWER CORPOR ATION P. O. BOX 157 GOVERNOR HUNT ROAD VERNON, VERMONT 05354

.VYV 84-562 November 10, 1984 U. S. Nuclear Regulatory Commission Director, Office of Management Information and Program Control Washington, D.C.

20555 i-

Dear Sir:

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

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION f Liu-h Warren P.

Murphy Vice President end Manager of Operations WPM /FJB/jbA4SR1.1 t?

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