ML20205D595

Monthly Operating Rept for May 1986

ML20205D595
Person / Time
Site:	Maine Yankee
Issue date:	05/31/1986
From:	Jacobs S, Taylor J, Whittier G Maine Yankee
To:	Hartfield R NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
0155N, 155N, 7446L-AJP, GDW-86-141, MN-86-77, NUDOCS 8608180099
Download: ML20205D595 (5)

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DPERATING DATA REPORT Docket No.: 50-309 Date: . 03/Jun/86 Completed By: Steven L Jacobs Telephone: 207-882-6321

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

2. Reporting Period................................ May 1986

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) NO RESTRICTIONS

10. Reasons for Restrictions, if Any:

THIS MONTH YEAR-TO-DATE CUMULATIVE

11. Hours In Reporting Period 744.00 3.623.00

12. Number of Hours Reactor Was Critical........... 744.00 3.162.54 95.500.26

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

14. Hours Generator On-line.. 744.00 3.106.03 92.750.69

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

16. Gross Thermal Energy Generated (MWH)........ 1.862.957.00 7.700.076.00 209.700.757.00

17. Gross Electrical Energy Generated (MWH)........ 630.430.00 2.596,890.00 68.836.610.00

18. Net Electrical Energy Generated (MWH)........ 602.638.00 2.503.895.00 65.690.210.00

19. Unit Service Factor...... 100.00 85.73 78.04

20. Unit Availabilty Factor.. 100.00 85.73 78.82

21. Unit Capacity Factor (Using MDC Net)........ 100.00 85.32 70.03

22. Unit Capacity Factor (Using DER Net)........ 98.18 83.77 68.18

23. Unit Forced Outage Rate.. 0.00 1.97 6.71 2A. Shutdowns Scheduled Over Next 6 Months: NONE

25. If Shutdown at End of Report Period, Estimated Date of Startup: N/A DO K shoh3o9 PDR T FY tII

Docket Nct. : 50-309 Unit Name: Maine Yankee Date: 02/ June /86 Completed By: J. M. Taylor Telephone: 882-6321 BEEQBI_t20 NIB: May 1986 NGHBeIIVE_SutteBLQE_QEEBGIING_EXEEBIENCES .

• At the beginning of the month, power was steady at 97.3% using MDFP's P-2:

and B. P-2C (TDMFP) had been removed from service on 4/27/86 due to a discharge pressure controller problem.

• Power remained at 97.3% until 28 May.

• On 28 May, a power reduction was commenced due to a steam / water leak on P-2A discharge bypass valve line. 54% power was reached and maintained.

• On 29 May, P-2C was returned to service in governor control mode.

• On 29 May, power was increased to 75% and maintained for turbine valve testing, south header mussel control, repairs to "A" TWS, and extraction steam and non-return valve testing.

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• On 30 May, power was increased to 79% and held there for mussel control a-the north header.

• On 31 May, power was initially increased to 96.5% then reduced to 90.3%

i while the HD-A-180 electronic controller was replaced.

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• At the end of the month, power was at 97.4% and increasing.

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AVERAGE DAILY UNIT-POWER LEVEL FOR MAY 1986 .

Docket No.: 50-309 Unit: Maine Yankee Date: 03/Jun/86 Completed By: Steven L Jacobs Telephone: 207-882-6321 Dny Avg. Daily Power Level Day Avg. Daily Power Level (MWe-Net) (MWe-Net) 1 .................... 835 16 .................... 830 2 .................... 834 17 .................... 829 3 .................... 832 18 .................... 829 4 .................... 834 19 .................... 830 5 .................... 834 20 .................... ,826 6 .................... 831 21 .................... 829 7 .................... 834 22 .................... 827 8 .................... 835 23 .................... 827 9 .................... 834 24 .................... 823 10 .................... 833 25 .................... 832 11 .................... 831 26 .................... 832 12 .................... 832 27 .................... 828 13 .................... 834 28 .................... 798 14 .................... 833 29 .................... 489 15 .................... 831 30 .................... 638 31 .................... 742

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UNIT SHUTDOWNS AND POWER REDUCTIONS Docket No.: 50-300 FOR MAY 1986 Unit: . Maine Yankee Date: 05/Jun/86 Completed By: Steven L Jacobs Telephone: 207-882-6321 Page: 1 of 1 Number L.R. to 54%

D;to 860528 Typ3 (1) F Durction -

(Hours) 17.8 R ccon (2) A - -

Method (3) 1 ..

LER # N/A -

Syctem Cod] (4) HH Component Cod] (5) PIPE-A Steam leak on motor driven feed pump discharge valve bypass line.

Ccure and Pipe removed from '

Corrective service and leak Action repaired.

c

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

License Examination --

O MAME HARHEE 'ATOMIOPOWER00MPARUe ,uaug,,y,?s?g%

h (207) 623-3521 e

June 8, 1986 MN-86-77 GDH-86-141 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 May, 1986.

Very truly yours, l

MAINE YANKEE ATOMIC POWER COMPANY bhW G. D. Whittier, Manager Nuclear Engineering and Licensing GDH/bjp Enclosure cc: Mr. Ashok C. Thadani Dr. Thomas E. Murley Mr. Pat Sears '

I Mr. Cornelius F. Holden v

d 7446L-AJP 4 y

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