ML20128C775

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Monthly Operating Rept for Apr 1985
ML20128C775
Person / Time
Site: Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date: 04/30/1985
From: Burger F, Murphy W
VERMONT YANKEE NUCLEAR POWER CORP.
To:
NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
VYV-85-267, NUDOCS 8505280405
Download: ML20128C775 (7)


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OPERATING DATA REPORT Docket No.- 50-271 Date 850510 Completed by F.J. Burger Telephone (802)257-7711 OPERATING STATUS ___

Notes: .

1. " Unit Name: Vermont Yankee

, 2. Reporting Period: April c3.: Licensed Thermal Power (MWt): 1593

~4.' -Nameplate 1 Rating-(Gross MWe): 540

5. - Design Electrical Rating (Net MWe):-514(OC)504(CC)
6. Maximum Dependable Capacity (Gross MWe): 535
7. iMaximum 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.~3 Reasons for restrictions, if any: N/A l This month Yr-to-Date Cumulative 111. Hours in Reporting Period 719.00 - 2879.00 12.' Number'of. Hours Reactor was Critical 719.00 2863.97 89677.90 ,

13.' Reactor Reserve Shutdown Hours 0.00 0.00- 0.00 14.. Hours Generator On-Line 719.00- 2858.55 87288.62

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00
16. Gross Thermal Energy Generated (MWH) :1133833.50 4496604.00 127055613.50
17. Gross ~ Electrical Energy Generated (MWH) 383244.00 1523790.00- 42313538.00
18. Net Electrical Energy Generated (MWH). 367063.00 1460724.00- 40161572.00
19. Unit Service Factor 100.00 99.29 78.98 20.lUnit Availability Factor 100.00 99.29 78.98 l21. Unit Capacity Factor (using MDC Net) 101.29 100.67 72.10'

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22. Unit Capacity Factor (using DER Net) 99.32 98.71 -- 70.70 i :23.. Unit Forced Outage Rate 0.00 .71 7.17 24.~ Shutdowns scheduled over next 6 months (Type, Date and Duration of Each):

Refuelina outaae scheduled to start September 14, 1985 and continue to April 26, 1985.

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 4

8505280405 850430 PDR ADOCK 05000271

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7 AVERAGE DAILY LNIT POWER LEVEL 1,,'- Docket No. 50-271-Unit -- Vermont Yankee .

-Date 850510 Completed by F.J. Buraer

-Telephone -(802)257-7711 MONTH. JApril' -

i- DAY ~ AVERAGE DAILY' POWER. LEVEL. DAY AVERAGE DAILY POWER LEVEL

, (MWe-Net)- (MWe-Net) 1- l' 516 17 515 ,

'21 516 18 515 3 ~517 - 19 516

'4 ' -517 20 516

5: 516 21 498 I

'6 517- 22' 516 i-

17. 511 23 514 l.

8 516 24 - 513' '

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9- 516 25 514 j- 10 494 ~26 513

' ll 491 27 513 Y - 12 515 28 505* >

13 '515 29 513 14 454 30 515 i

15 515 31 --

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[l 16 515 *23 hour day  ;

, INSTRUCTIONS:

On_this format, list the average daily unit power level in W e-Net for each day i . in the reporting month. Compute to the nearest whole megawatt.
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' Dock t Noi 50-271-Unit Vermont Yafkee-UNIT SHUTDOWNS 'AND POWER REDUCTIONS Date -850510

, Completed by F.J. Burger- '

REPORT K) NTH ' April Telephone (802J257-7711:

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 Recurrence Reactor Report #

85-07 850414 S 0 B .4 N/A RB CONROD Power reduction for surveillance (Power -

and a control rod pattern I~

adjustment.

Reduction) 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-Operator 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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--Docket No.- 50-271 Unit Vermont Yankee Date- 850510 Completed by F.J. Burger Telephone (802)257-7711-REPORT MONTH April SLM MRY 0F OPERATING EXPERIENCES

- Highlights Vermont Yankee operated at98.9% of rated thermal power for the month. Gross electrical generation was 383,244 MWHe or 98.7 % of design electrical capacity.

Operatina Summary The following is a chronological description of plant operations including-4 other pertinent items of interest for the months

- At the beginning of the reporting period the plant was operating at 99.9% of

. rated-thermal power.

850414 At 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> a power reduction was initiated for surveillance testing and control rod pattern adjustment..

850414 At 0215 hrs a return to full power was initiated.

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

MSR.F5

VERMONT YANKEE NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR IIUh"r ROAD VERNON, VERMONT 05354 VYV 85-267 May 10, 1985 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 April,1985.

Very truly yours, VERMONT Yare (EE NUCLEAR POWER CORPORATION d*ss--f */

Warren P'. Murphf Vice President an Manager of Operations WPM 8JB/pd:MSR1.1 56 f

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4 MONTHLY STATISTICAL REPORT 85-04

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