ML20153E051

Monthly Operating Rept for Apr 1988

ML20153E051
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	04/30/1988
From:	Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
VYV-88-083, VYV-88-83, NUDOCS 8805090381
Download: ML20153E051 (6)

Text

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OPERATING DATA REPORT i

DOCKET NO.

50-271 DATE 880510 COMPLETED BY-G.A. Wallin TELEPHONE (802)257-7711 OPERATING STATUS 1.

Unit Names Vermont Yankee NOTES:

2.

Reporting Period:

April 3.

Licensed Thermal Power (MWt):

1593 4.

Nameplate Rating (Gross MWe):

540 5.

Design Electrical Racing (Net MWe): 514(oc) 504(cc) 6.

Maximum Dependable capacity (Gross MWe): 535 7.

Maximum Dependable Capacity (Net MWe):

~5UT 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 719.00_

2903.00 12.

Number Of Hours Reactor was Critical 719.00 2903.00 107748.36 13.

Reactor Reserve Shutdown Hours 0.00.

0.00 0.00 14.

Hours Generator On-Line 719.00 2903.00 105172.27 15.

Unit Reserve Shutdown L.;rs 0.00 0.00 0.00 16.

Gross Thermal Energy Generated (MWH)1130655.50

_4569656.50 154310368.09 17.

Gross Electrical Energy Generated

_381815.00 1545698.00

_51385642.00 18.

Net Electrical Energy Generated (MWH)365556.00 1482362.00 48777449.00 19.

Unit Service Factor 100.00 100.00 76.87 20.

Unit Availability Factor 100.0_0 100.00 76.87 21.

Unit Capacity Factor (Using MDC Net) 100.88 101.32 70.73 i

22.

Unit Capacity Factor (Using DER Net) 98.91 99.34 69.36 23.

Unit Forced Outage Rate 0.00 0.00 6.15 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 26.

Units In Test Status (prior to commercial operation): N/A Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01 DP 0411 Rev. 2 Pag 3 1 of 1 1)

RT No. 13.F01.19F

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE - 880510 COMPLETED BY G.A.

Wallin TELEPHONE (802)257-7711 MONTH April DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1.

516 17.

510 2.

516 18.

514

• 3.

469 19.

514

~

4.

516 20.

514 5.

516 21.

515 6.

518 22.

515 7.

517 23.

515 8.

517 24.

511 9.

516 25.

515 10, 513 26.

514 11.

516 27.

514 12.

516 28.

514 13.

515 29.

513 14.

515 30.

348 15.

515 31.

16.

515

• - 23 hour2.662037e-4 days <br />0.00639 hours <br />3.80291e-5 weeks <br />8.7515e-6 months <br /> day.

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 magawatt.

VYDPF 0411.02 DP 0411 Rev. 2 Page 1 of 1 RT No. 13.F01.18V

e 1

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET No 50-271 REPORT MONTH APRIL UNIT NAME Vermont Tankee DATE 880510 COMPLETED BY ji.A. Wallin TELEPHONE (802)257-7711 1

2 Method of License System 4 Component cause and Corrective No.

Date Type Duration Reason Shutting Down Event Code Code Action to thouss)

Reactor 3

Report 9 4

5 Prevent Recurrence 88-04 880430 S

0.00 B,H*

4 N/A RB CONROD Single Rod Scram testing; Control Power Rod and Turbine Bypass valve Reduction testing; weekly Turbine surveillance and a Rod Pattern Exchange.

88-04 880430 3

0.00 5

4 N/A CB XXXXXX "A*

end "B"

recirculaton MG sets Power removed from service for brush Reduction wear replacement.

1 F: Forced 2 Reason:

3 Method.

4 Exhibit G-Instructions 5: Scheduled A-Eguipment Fa.

ure (Explain) 1-Manual for Preparation of Data B-Maintenance o.

Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Other (Explain)

(NUREG 0161)

E-Operator Training and License Examination F-Administrative 5 Exhibit I - Same Source VYDFF 0411.03 G-Operational Error (Explain)

DP 0411 Rev. 2

• H-(Explain) - Control Rod Pattern Exchange Page 1 of 1 RT No. 13.F01.18W 1

DOCKET No. 50-271 UNIT Vertont Ynnken DATE 880510 COMPLETED BY G.A.

Wallin TELEPHOrE (802)257-7711 REPORT MONTH April

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 98.7% of rated thermal power for the month.

Gross electrical generation was 381,815 MWHe or 98.3% design electrical capacity.

t Oparating 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 99.9%

of rated thermal power.

880430 At 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br />, initiated a power reduction to minimum recirculation flow to perform scheduled maintenance, surveillance testing, single rod scram testing and a rod pattern exchange.

880430 At 0837 hours0.00969 days <br />0.233 hours <br />0.00138 weeks <br />3.184785e-4 months <br />, secured the "A"

recirculation pump for MG set brush replacement.(See Unit Shutdowns and Power Reductions) 880430 At 0947 hours0.011 days <br />0.263 hours <br />0.00157 weeks <br />3.603335e-4 months <br />, initiated control rod exercising.

(See Unit Shutdowns and Power Reductions) 880430 At 1055 hours0.0122 days <br />0.293 hours <br />0.00174 weeks <br />4.014275e-4 months <br />, completed control rod exercising.

880430 At 1100 hours0.0127 days <br />0.306 hours <br />0.00182 weeks <br />4.1855e-4 months <br />, commenced turbine bypass valve and weekly turbine surveillance.

(See Unit Shutdowns and Power Reductions) 1 j

880430 At 1145 hours0.0133 days <br />0.318 hours <br />0.00189 weeks <br />4.356725e-4 months <br />, completed turbine bypass valve and weekly turbine j

surveillance.

i 800430 At 1150 hours0.0133 days <br />0.319 hours <br />0.0019 weeks <br />4.37575e-4 months <br />, started the "A" recirculation pump following MG set brush replacement.

880430 At 1157 hours0.0134 days <br />0.321 hours <br />0.00191 weeks <br />4.402385e-4 months <br />, secured the "B" recirculation pump for MG set brush replacement.

(See Unit Shutdowns and Power Reductions) 880430 At 1245 hours0.0144 days <br />0.346 hours <br />0.00206 weeks <br />4.737225e-4 months <br />, initiated single rod scram testing.

(See Unit

'i Shutdowns and Power Reductions) 880430 At 1550 hours0.0179 days <br />0.431 hours <br />0.00256 weeks <br />5.89775e-4 months <br />, started the "B"

recirculation pump following MG set brush replacement.

880430 At 1815 hours0.021 days <br />0.504 hours <br />0.003 weeks <br />6.906075e-4 months <br />, completed single rod scram testing and initiated a rod pattern exchange.

880430 At 1925 hours0.0223 days <br />0.535 hours <br />0.00318 weeks <br />7.324625e-4 months <br />, completed the rod pattern exchange and a return to full power was initiated.

At the end of the reporting period the plant was operating at 77.7%,of rated thermal power.

VYDPF 0411.04 DP 0411 Rev. 2 Page 1 of 1 RT No. 13.F01.18X

' VERMONT YANKEE NUCLEAR POWER CORPOR ATION P. O. BOX 157 GOVERNOR HUNT ROAD VERNON, VERMONT 05354 May 10, 1988 VYV 88-083 l

i U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.

20555 1

1

Dear Sir:

Submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of April, 1988.

Very truly yours, VERMONT YANKEE N'JCLEAR POWER CORP.

3 0

Warren P.

Murphy Vice President and Manager of Operations cc:

1) USNRC Region I i

475 Allendale Road King of Prussia, PA 19406 f

2) USNRC Resident Inspector, VYNPS DP 0411 Rev. 2

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