ML20154D391

Monthly Operating Rept for Apr 1988

ML20154D391
Person / Time
Site:	Maine Yankee
Issue date:	04/30/1988
From:	Rivard D, Whittier G Maine Yankee
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
9905L-SLH, GDW-88-102, MN-88-53, NUDOCS 8805190174
Download: ML20154D391 (6)

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Month 1y St at i sst i c al Repot-t i

F or-Apr-i 1 1988 l

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DCD w---.-- -- -.-

OPERATING DATA REPORT Dock t No.:

50-309 Date:

03/May/88 Completed By:

D.A.

Rivard I

Telephone:

207-882-6321 1.

Unit Name.......................................

Maine Yankee 2.

Reporting Period................................

Aoril 1988

3. Licensed Thermal Power (MWt)....................

2630

4. Nameplate Rating (Gross MWe)....................

864 5.

Design Electrical Rating (Net MWe)..............

825 6.

Maximum Dependable Capacity (Gross MWe).........

850 7.

Maximum Dependable Capacity (Net MWe)...........

810 8.

If Changes in Capacity Ratings (Items Number 3-7)

Since Last Report, Give Reasons:

NO CHANGES 9.

Power Level to Which Restricted, if Any (Net MWe)

10. Reasons for Restrictions, if Any:

THIS MONTH YEAR-TO-DATE CUMULATIVE

11. Hours In Reporting ? *iod 719.00 2.903.00

12. Number of Hours Reat. or Was Critical...........

719.00 2.886.92 108.740.24

13. Reactor Reserve Shutdown Hours..................

0.00 0.00

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14. Hours Generator On-line..

719.00 2.873.78 105.628.96

15. Unit Reserve Shutdown Hours..................

0.00 O.00 0.00

16. Gross Thermal Energy Generated (MWH)........

1.886.660.00 7.514.991.00 241.875.322.00

17. Gross Electrical Energy Generated (MWH)........

592.360.00 2.362.050.00 79.250.780.00

18. Net Electrical Energy Generated (MWH)........

573.079.00 2.284.618.00 75.755.590.00

19. Unit Service Factor......

100.00 98.99 77.91

20. Unit Availabilty Factor..

100.00 98.99 77.91

21. Unit Capacity Factor (Using MDC Net)........

98.40 97.16 70.52

22. Unit Capacity Factor (Using DER Net)........

96.61__

95.39 68.73

23. Unit Forced Outage Rate..

0.00 1.01 7.15

24. Shutdowns Scheduled Over Next 6 Months:

Date Type Duration 10/15/88 REFUELING OUTAGE 8 WEEKS

25. If Shutdown at End of Report Period, Estimated Date of Startup:

N/A

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Dockot No:

50-309 Unit Neme:

Maino Ycnkco Date:

02 MAY 88 Completed By:

D.A.

Rivard Telephone:

207-882-6321 t

Report Month April, 198d NARRATIVE

SUMMARY

OF OPERATING EXPERIENCES At the beginning of the month, the unit was operating at 100% power.

On 2 April, a scheduled power reduction to 85% was conducted to perf orm turbine valve and excess flow check valve testing.

Power was returned to 100% after the testing was completed.

On 12 April, power was reduced to 92% during the recovery of a dropped CEA and then returned to 100%.

On 29 April, power was reduced to 76% due to a malfunction in the Section 377 transmission line.

The plant utilized this power reduction to perform turbine valve and excess flow check valve testing.

Power was returned to 100% later in the day.

At the end of the month, the unit was operating at 100% power.

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c AVERAGE DAILY UNIT POWER LEVEL FOR APRIL 1988 DockCt No.:

50-309 i

Unit:

Maine Yankee Date:

03/May/88 Completed By:

D.A.

Rivard Telephone 207-882-6321

+

i Dcy Avg. Daily Power Level Day Avg. Daily Power Level (MWe-Net)

(MWe-Net) 799 1

798 16 797 2

777 17 3

799 18 799 4

799 19 798 5

799 20 800 799 6

800 21 799 7

799 22 8

799 23 798 9

800 24 799 10 800 25 798 11 798 26 799 12 800 27 799 13 797 28 799 14 800 29 768 15 799 30 799 p

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UNIT SHUTDOWNS AND POWER REDUCTIONS Dockst No.:

50-309 FOR APRIL 1988 Unit M ino Ycnkee Dato:

02/M y/88 Completed By:

D.A.

Rivard Telephone:

207-882-6321 Page:

1 of 1 Number L.

R.

to 76*/.

D:te 880429 Type (1)

F Duration (Hours)

O R ason (2)

B M;thod (3) 4 LER #

N/A System Code (4)

EA Component Code (5)

ELECON Reduced power due to a malfunction on a transmission line.

Utilized Ccuse and down time to Corrective perform turbine Action valve and excess flow check valve testing.

Line problem corrected and power restored

1. TYPE:

2.

REASON: (cont) 4.

SYSTEM CODE:

(F)orced F-Administrative Exhibit G-Instructions (S)cheduled G-Operational Error for Preparation of Data H-Other (Explain)

Entry Sheets for

2. REASON Licensee Event Report A-Equipment Failure

3. METHOD:

(LER) File (NUREG.0161)

B-Maintenance or Test 1-Manual C-Refueling 2-Manual Scram 5.

COMPONENT CODE:

D-Regulatory Restriction 3-Automatic Scram Exhibit I-Same source E-Operator Training &

4-Other (Explain) as above.

License Examination i

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MaineYankee RELIABtf ELECTRICITY FOR MA!NE $rNCE 1972 EDISON DRIVE e AUGUSTA. MAINE 04330.(207) 6224 868 May 10, 1988 HN-88-53 G0H-88-102 Office of Resource Management United States Nuclear Regulatory Commission Washington, D. C.

20555 Attention:

Document Control Desk

References:

(a)

License No. DPR-36 (Docket No. 50-309)

(b) NUREG-0020, Licensed Operating Reactors Status Summary Report

Subject:

Maine Yankee Monthly Statistical Report Gentlemen:

Enclosed you will find the Monthly Statistical Report for the Maine Yankee Atomic Power Station for April, 1988.

Very truly yours, HAINE YANKEE AJh AV G. D. Whittier, Manager Nuclear Engineering and Licensing GDH/sab Enclosure cc: Mr. Richard H. Hessman Hr. William T. Russell Mr. Patrick H. Sears Mr. Cornelius F. Holden l

1 9905L-SLH I

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