BVY-98-135, Monthly Operating Rept for Aug 1998 for Vermont Yankee Nuclear Power Station.With

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Monthly Operating Rept for Aug 1998 for Vermont Yankee Nuclear Power Station.With
ML20151V421
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 08/31/1998
From: Balduzzi M, Wallin G
VERMONT YANKEE NUCLEAR POWER CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-98-135, NUDOCS 9809140304
Download: ML20151V421 (6)
v • d • e


Text

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VERMONT YANKEE NUCLEAR POWER CORPORATION P.O. Box 157, Govemor Hunt Road Vemon, Vermont 05354-0157 (802) 257-7711 September 10,1998 BVY-98-1?i United States Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Reference:

(a) License No. DPR-28 (Docket No. 50-271)

In accordance with section 6.7.A.3 of the Vermont Yankee Technical Specifications, submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of August.1998.

Sincerely, VERMONT YANKEE NUCLEAR POWER CORPORATION '

.s&dArrfdd y Michael A. Balduzzi Plant Manager -

cc: USNRC Region I Administrator  ;

USNRC Resident Inspector - VYNPS ,;

USNRC Project Manager - VYNPS j Vermont Department of Public Service }ypt  ;

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9009140304 900831 PDR ADOCK 05000271 R PDR ;,

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i VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 9fM8

l FOR THE MONTH OF AUGUST 1998 i

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. OPERATING DATA REPORT DOCKET NO.50-271  !

l DATE 980910 ,

COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 OPERATING STATUS l '1. Unit Name: Vermont Yankee l 2. Reporting Period: August

3. Licensed Thermal Power (MWt):1593
4. Nameplate Rating (Gross MWe): 540 l

S. Design Electrical Rating (Net MWe) : 522 l

6. Maximum Dependable Capacity (Gross MWe): 535
7. Maximum Dependable Capacity (Net MWe): 510
8. If changes, occur in capacity ratings (Items Number 3 through 7) since last report, give reasons:

l 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 5831.00 224975.00
12. Number Of Hours Reactor was Critical 744.00 3994.00 187373.98
13. Reactor Reserve Shutdown Hours 0.00 0.00
14. Hours Generator On-Line 744.00 0.00 3901.00 -~~ 183934.00
15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

!- 16. Gross Thermal Energy Generated (MWH) 1170267.90 5915939.90 276689843.80

17. Gross Electrical Energy Generated (MWH) 395350.00 2014;237.00 92538021.00  !
18. Net Electrical Energy Generated (MWH) 373743.00 1921338.00 88004393.00 19.' Unit Service Factor 100.00 66.90 80.60 L 20. Unit Availability Factor- 100.00 66.90 80.60 l' 21. Unit Capacity Factor (Using MDC Net) 98.50 64.60 , 76.40 l
22. Unit Capacity Factor (Using DER Net) 96.20 63.10 74.90
23. Unit Forced Outage Rate 0.00 3.07 4.53

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

25. If shut down at end of report period, estimated date of startup: N/A i 26. Units In Test Status (prior to commercial operation): N/A

! Forecast Achieved

! INITIAL CRITICALITY

, INITIAL ELECTRICITY l COMMERCIAL OPERATION l

VYDPF 0411.01 (Sample)

DP 0411 Rev. 7 Page 1 of 1 RT No. 13.F01.19F i

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' AVERAGE DAILY UNIT. POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee f

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DATE 980910 COMPLETED BY G.A. WALLIN  !

TELEPHONE (802)258-5414 1 MONTE August i

-DAY -AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER' LEVEL (MWe-Net). (MWe-Net)  ;

1. - -511= 17. 503  ;

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2. 509 18. 472

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3; 508 19. 508 l 4.- 504 20, 501 f

5. 505 21. 492
6. 505 22. 492  ;
7. 504 _
23. 490 8.- ,

504 24. 491 9 '. . 507 25. 496 110.. 505 26. 503 i

~11. 505 27. 495  !

12 . - 510 28. 496 13.- 512 29. 508-14.; 512 30. 507

15. ,

507 31. 507

16. - 504
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.

L VYDPF 0411.02 (Sample) l DP 0411 Rev. 7 Page 1 of 1 e RT No. 13.F01.18V I

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t UNIT SHUTDOWNS.AND PODER. REDUCTIONS'  !

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. REPORT MONTH AUGUST DOCKET NO 50-271' _

UNIT NAME Vermtnt' Yankee- [

DATE 980910 COMPLETED BY G.A. Wallin TELEPHONE (802)258'-5414 i

1 2 3 4 5 r No. . Date Type Duration Reason Method of License System Component Cause and Corrective  !

l(hours) Shutting Event- Code' ' Code . Action.to Preventz Down Report #

Recurrence Reactor I 98-08' 980818 S 0.00 B,*H. N/A N/A RB CONROD Power reduction for turbine bypass. valve, main steam 'l isolation valve testing, and. j a rod pattern exchange i t

1 F: Forced 2 Reason: 3 Method: 4 Exhibit G-. Instructions S: Scheduled A-Equipment Failure (Explain) 1 - Manual for Preparation of Data B-Maintenance-or Test 2 - Manual Scram Entry Sheets for License C-Refueling 3 - Automatic Scram Event Report (LER) File D-Regulatory Restriction 4 - Other (Explain) (NUREG 0161)

E-Operator Training and:

License Examination 5 Exhibit I - Same-Source VYDPF 0411.03 F-Administrative-DP 0411 Rev. 7 G-Operational Error (Explain)

Page 1 of 1 '*H-(Explain) - Rod pattern exchange

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i DOCKET NO. 5_0-271 l L DATE 980910 l COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 REPORT MONTH August l- '

SUMMARY

-OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 98.8% of rated thermal power for the month. j Gross electrical generation was 395,350 MWHe or 97.3% design electrical '

capacity.

l- . Operating Summary j The following is a chronological description of plant operations including L . other pertinent items of interest for the month:

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

of rated thermal power.

980818 At 0209 hours0.00242 days <br />0.0581 hours <br />3.455688e-4 weeks <br />7.95245e-5 months <br />, initiated a power reduction to 72.5% power to perform turbine bypass valve testing, main steam isolation valve testing, and a rod pattern exchange. (See Unit Shutdowns and Power' Reductions)

- 980818 At-0240 hours, and at 72.5% power, commenced turbine bypass valve  ;

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testing.

j 980818 At 0256 hours0.00296 days <br />0.0711 hours <br />4.232804e-4 weeks <br />9.7408e-5 months <br />, completed turbine bypass valve testing.

980818 At-0306 hours, commenced main steam isolation valve testing.

980818 At-0319 hours, completed main steam isolation valve testing.

980818 At 0323 hours0.00374 days <br />0.0897 hours <br />5.340608e-4 weeks <br />1.229015e-4 months <br />,' commenced a rod pattern exchange.

980818 At 0429 hours0.00497 days <br />0.119 hours <br />7.093254e-4 weeks <br />1.632345e-4 months <br />, completed the rod ra'. tern exchange.

l 980818 At 0442 hours0.00512 days <br />0.123 hours <br />7.308201e-4 weeks <br />1.68181e-4 months <br />, commenced a retur" ' o full power.

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l lAt the end of the' reporting period the plant was operating at 99.9% of l rated thermal power.

VYDPF 0411.04 (Sample)  ;

DP 0411 Rev. 7 <

Page 1 of 1 RT No. 13.F01.18X  !

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