ML20237H648

Monthly Operating Rept for Jul 1987

ML20237H648
Person / Time
Site:	Maine Yankee
Issue date:	07/31/1987
From:	Taylor J, Whittier G Maine Yankee
To:	NRC
References
9050L-GDW, GDW-87-187, MN-87-89, NUDOCS 8708250095
Download: ML20237H648 (6)

Text

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. OPERATING DATA REPORT .

Docket No.: 50-309 Date: 05/Aug/87

{ Completed By: J.M. TAYLOR Telephone: 207-882-6321

1. Unit Name....................................... Maine Yankee

2. Reporting Period................................ July 1987

3. Licensed Thermal Power-(MWt).................... 2630

4. NamepInte 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) NO RESTRICTIONS _

10. Reasons for Restrictions, if Any:

THIS MONTH YEAR-TO-DATE CUMULATIVE 1 1.. Hours In Reporting Period 744.00 5.087.00

12. Number of Hours Reactor Was Critical........... 175.53 2.576.06 102.704.95

13. Reactor Reserve Shutdown Hours.........~......... 0.00 0.00 0.00

14. Hours Generator On-line.. 29.10 2.306.66 99.646.35

15. Unit Reserve Shutdown Hours.................. 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH)........ 17.046.00 5.101.849.00 226.359.161.00

17. Gross Electrical Energy Generated (MWH)........ 4.550.00 1.655.730.00 74.356.740.00

18. Net Electrical Energy Generated (MWH)........ 4.054.00 1.593.603.00 71.021.674.00

19. Unit Service Factor...... 3.91 45.34 77.20

20. Unit Availability Factor.. 3.91 45.34 77.91

21. Unit Capacity Factor (Using MDC Net)........ O.67 38.68 69.59

22. Unit Capacity Factor (Using DER Net)........ 0.66 37.97 67.79

23. Unit Forced Outage Rate.. 96.09 25.57, 7.04

24. S:tutdowns Scheduled Over Next 6 Months: NONE

25. If Shutdown at End of Report Period, Estimated Date of Startup: 8/12/S7

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8708250095 870731

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Docket No: 50-309 Unit Name: Maine Yankee Date: 04/Aug/87 Completed By: J.M. Taylor Telephone: 207-882-6321 Report Month: July, 1987 NARRATIVE

SUMMARY

OF OPERATIN8 EXPERIENCES At the beginning of the month power was 34% and increasing.

On.1 July the unit was manually tripped due to main turbine vibration.

On 3 July the unit was phased to the grid and immediately removed due to main turbine vibration.

On 9 July the reactor was brought to a cold shutdown condition. l On 16 July the unit was phased to the grid and later removed due to main turbine vibration.

On 17 July the unit was phased to the grid and power increased to 27%.

On 18 July the unit was taken off-line and the reactor brought to -

l c cold shutdown condition due to main turbine vibration. l The unit was shutdown for the remainder of the month.

d IAVERAGE' DAILY UNIT POWER LEVEL-t/

a

- - . FOR JULY;1987- ,

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Docket No.: 50-309 Unit: Maine Yankee

!- Date:. 05/Aug/87 Completed By: J.M. TAYLOR Telephone: 207-882-6321 l

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i-Day. Avg. Daily Power Level Day Avg. Daily Power Level

'(MWe-Net) (MWe-Net) i i 1- .................... 23 16 .................... 45 2 .................... O 17 .................... 27 3 .................... O 18 .................... 74 4 .................... O 19 .................... O-5 .................... O 20 .................... O 6 -.................... O 21 .................... O 7 .................... O 22 .................... OE

-8 .................... O 23 .................... O 9 ..................... O 24 .................... O 0 .................... O 25 .................... O

11. .................... O 26 .................... O

12. .................... O 27' .................... O

.13 .................... O 28 .................... O 14 .................... O 29 .................... O 15 .................... O 30 ....................

O 31 .................... O

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Ut)l,IT SHUTDOWNS AND POWER REDUCTIONS Dockat No. 50-309 FOR JULY 1987 Unita Maine Yankco ',

f. Date: 05/Aug/87 Completed By: J.M. TAYLOR Telephone: 207-882-6321 Page: 1 of 2 l Numba* 21-87-10 22-87-10 23-87-10 Dets 870701 870703 870716 j Typa (1) F F F Durction (Hours) 61.4 297.3 30.1 I

Rasson (2) B B D M3thod (3) 2 1 1 LER'O 87-007 N/A N/A System Cods (4) HA HA HA Component Coda (5) turbin turbin turbin manual trip due to main turbine main turbine turbine vibration, vibration, gland vibration, rolled balanced turbine seal repair turbine Ccece and Corrective Action i

2. TYPE: 2. REASON: (cont) 4. SYSTEM CODE:

(F)orced F-Administrative Exhibit G-Instructions (S) chedul ed G-Operati onal Error f or Prepar ation of Data l

H-Other (Explain) Entry Sheets for

2. REASON Licensee Event Report A-Equipment Failure 3. METHOD: (LER) File (NUREB.0161)

B-Maintenance or Test 1-Manual C-R2 fueling 2-Manual Scram 5. COMPONENT CODE:

D-Ragulatory Restriction 3-Automatic Scram Exhibit I-Same source E-Operator Training & 4-Other (Explain) as above.

License Examination

' UNIT SHUTDOWNS AND POWER REDUCTIONS Docket No.: 50-309

, l , , FOR JULV 1987 Unit: _ Maine Yankee Date: 05/Aug/87

. Completed By: J.M. TAYLOR I Telephone: 207-882-6321 Page: 2 of 2 Number 24-87-10 Date 870718 Type (1) F k Duration jb (Hours) 326.1 Reason (2) B n Method (3) 1 LER # '

N/A System s Code (4) HA .4 Component ,

Code (5) turbin s, main turbine vibration m

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Cause and Corrective Action \'

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1. TYPE: 2. REASON: (cont) . 4. SYSTEM CODE:

(F)orced F-Administrative E>thibit G-Instructions (S)cheduled G-Operational Error for Preparation of Data s

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 So[am -

Exhibit I-Same source E-Operator Training & 4-Other (Exp1Ain) '

as above.

License Examination s, 8> ~

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h RIAIRE HARHEE ATOMICPOWERCOMPARUe ,uaug,,K,?,lgTg"g's h (207) 623-3521 I e

August 7, 1987 MN-87-89 GDH-87-187 Office.of Resource Management United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. Richard A. Hartfield, Chief Management Information Branch

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 July, 1987.

Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY N./0 W G. D. Whittier, Manager Nuclear Engineering and Licensing GDH/sab Enclosure cc: Mr. Victor Nerses Mr. Hilliam T. Russell Mr. Pat Sears Mr. Cornelius F. Holden i i 9050L-GDH

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