ML20214L582

Monthly Operating Rept for June 1986

ML20214L582
Person / Time
Site:	Maine Yankee
Issue date:	06/30/1986
From:	Jacobs S, Whittier G Maine Yankee
To:	Hartfield R NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
GDW-86-159, MN-86-86, NUDOCS 8609100282
Download: ML20214L582 (5)

Text

i 4 OPERATING DATA REPORT Docket No.: 50-309 Date: 03/Jul/86 Completed By: Steven L Jacobs Telephone: 207-882-6321

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

2. Reporting Period................................ June 1986

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

4. Nameplate Rating (Gross MWe).................... 864

5. Design Electrical Rating (Net MWe).............. 825

p. 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

11. Hours In Reporting Period 720.00 4.343.00

12. Number of Hours Reactor Was Critical........... 687.32 3.849.86 96.187.58

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

14. Hours Generator On-line.. 674.73 3.780.76 93.425.42

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

16. Gross Thermal Energy Generated (MWH)........ 1.548.707.00 9.248.783.00 211.249.464.00

17. Gross Electrical Energy Generated (MWH)........ 515.420.00 3.112.310.00 69.352.030.00

18. Net Electrical Energy Generated (MWH)........ 497.592.00_ 3.001.487.00 66.187.802.00

19. Unit Service Factor...... 93.71 87.05 78.13

20. Unit Availabilty Factor.. 93.71 87.05 78.91

21. Unit Capacity Factor (Using MDC Net)........ 85.32. 85.52_ 70.13

22. Unit Capacity Factor (Using DER Net)........ 83.77 83.77 68.28

23. Unit Forced Outage Rate.. 4.12 2.36 6.69

24. Shutdowns Scheduled Over Nent 6 Months: NONE

25. If Shutdown at End of Report Period, Estimated Date of Startup: 7/18/86 8609100282 860630 [ 1~N as PDR ADOCK 05000309 R PDR ll

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AVERA E DAILY UNIT POWER LEVEL FOR JUNE 1986 Docket No.: 50-309 Unit: Maine Yankee

, - _ . Date: 03/Jul/86

Completed By

Steven L Jacobs Telephone: 207-882-6321 Day Avg. Daily Power Level Day Avg. Daily Power Level (MWe-Net) (MWe-Net) 1 .................... 823 16 .................... 679 2 .................... 821 17 .................... 717 3 .................... 823 18 .................... 716 4 .................... 826 19 .................... 719 5 .................... 838 20 .................... ,

720 -

6 .................... 844 21 .................... 720 7 .................... 844 22 .................... 718 8 .................... 847 23 .................... 719 9 .................... 847 24 .................... 717 10 .................... 847 25 .................... 716 11 .................... 847 26 .................... 718 1

12 .................... 470 27 .................... 720 13 .................... 22 28 .................... 716 14 .................... 258 29 .................... 718 15 .................... 657 30 .................... 110 1

- - - - . . - - . . ,,.__..y.. _ , . , _. .____r._-_,_m,-,r.__._..m. - , _ _ . _ - , . -

LMIT SHUTDOWNS AND POWER REDUCTIONS Dockct No.: 50-309 FOR JUNE 1986 Unit Maine Yankee

. Date: 03/Jul/86 Completed By: Steven L Jacobs Telephone: 207-882-6321 Page: 1 of 1 Number 11-86-9 12-86-9 D;to 860612 860630 Typa (1) F S Durction (Hours) 29 16.3 Re son (2) A B Method (3) 3 1 LER # 86-003 N/A Cystee Coda (4) CD CD Component Coda (5) VALVEX-D VALVEX-D EFCV #2 closed Maintenance causing plant trip outage to repair on low S/G 1evel. EFCV air cylinders and to inspect Cr.ure and Replaced rupture condenser.

Corrective disks in EFCV air Action cylinders. Installed new type rupture disk assembly in EFCV air cylinders.

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

l (F)orced F-Administrative Exhibit G-Instructions i

(S)cheduled G-Operational Error for Preparation of Data l H-Other (Explain) Entry Sheets for

! 2. REASON Licensee Event Report l

A-Equipment Failure 3. METHOD: (LER) File (NUREG.0161)

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

D-R gulatory Restriction 3-Automatic Scram Exhibit I-Same source E-Operator Training t< 4-Other (Explain) as above.

l License Examination t

i . . e' Docket No.: 50-309 Unit Name Maine Yankee

.. _ . Date: 03/Jul/86 Completed By: J. M. Taylor Telephone: 207-882-6321 Report Month: June, 1986 NARRATIVE

SUMMARY

OF OPERATING EXPERIENCES At the beginning of the month, power was at 97% and increasing at 1% per chift.

At midday of June 1st, a power decrease to 96% was made due to level oscillations in the #2 steam generator. ,

On June 4th, the plant 'was loaded to 98% power.

On June 5th, the plant was loaded to 99% power.

On June 12th, a plant trip on law steam generator level occured when the

1. 2 EFCV (Excess Flow Check Valve) closed.

On June 13th, the reactor was made critical, the unit phased to the grid, cnd power increased to 21%.

Latcr in the day of June 13th, power was reduced to and stabilized at 15%

while high chloride' levels in the steam generators and condenser were bOing corrected.

On June 14th, power was increased to 75%.

On June 15th, power was increased to 80%.

On June 16th, power was stabilized at 85% while investigating the EFCV closure of June 12th.

On June 30th, power was reduced, the generator was taken off-line, and the roactor was made subcritical for a maintenance shutdown to repair EFCV air cylinders and to inspect the condenser.

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1. g MAIRE HARHEE 'ATOMICPOWERCOMPARUe ,uaugr,K,,?n"ey,'s h (207) 623-3521 e

July 7, 1986 HN-86-86 GDH-86-159 Office of Resource Management United States Nuclear Regulatory Commission Nashington, 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 June,1986.

Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY

)19 /W -r G. D. Whittier, Manager Nuclear Engineering and Licensing GDH/bjp Enclosure cc: Mr. Ashok C. Thadani Dr. Thomas E. Murley Mr. Pat Sears Mr. Cornelius F. Holden

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