ML20133H557

Monthly Operating Rept for May 1985

ML20133H557
Person / Time
Site:	Maine Yankee
Issue date:	05/31/1985
From:	Anderson T, Whittier G Maine Yankee
To:	Hartfield R NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
5873L-RMN, GDW-85-169, MN-85-113, NUDOCS 8508090392
Download: ML20133H557 (5)

Text

c Docket No. 50-309 Date 850603 OPERATING DATA REPORT Completed By T.R. Anderson Telephone 207-882-6321 t

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

2. . Reporting Period..........May 1985

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 3 _

7. Maximum Dependable Capacity (Net MWe).... 810

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

Since Last Report, Give Reasons:.....

9. Power Level to Which Restricted, If Any (Net MWe) _______________ ___

10. Reasons for Restrictions, If Any......

THIS MONTH YR.-TO-DATE CUMULATIVE

11. Hours in Reporting Period 744 3,623.00

12. Number of Hours Reactor Was Critical 714.40 3,578.50 88,879.04

13. Reactor Reserve Shutdown. '

Hours -

0.00 0.00 0.00

14. Hours Generator On-Line 698.30 3,553.80 86,263.50

15. Unit Reserve Shutdown '

Hours 0.00 O.00 0.00

16. Gross Thermal Energy Generated (MWH) 1,692,963.00 '

8,7' ,321.00 194,091,235.00

17. Gross Electrical Energy Generated (MWH) 568,310.00 2, 40,140.00 63,613,420.00 '

18. Net Electrical Energy Generated (MWH) 543,339.00 2,835,526.00 60,667,418.00

19. Unit Service Factor 93.86 98.09 78.36

20. Unit Availability Factor 93.86 98.09 79.20

21. Unit Capacity Factor ,

(Using MDC Net) 90.16 96.62 69.97

22. Unit Capacity Factor (Using DER Net) 88.52 94.87 68.08

23. Unit Forced Outage Rate 1.08 0.87 7.02

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration):

An eight week refueling shutdown is scheduled to start August 17, 19G5.

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

26. Units in Test Status (Priur to Commercial Operation):

Forecast Achieved Initial Criticality ________ ________

Initial Electricity- ________ ________

Commercial Operation ________ ________

8500090392 850531 PDR ADOCK 05000309 R PDR

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AVERAGE DAILY UNIT POWER LEVEL Docket No. 50-309 Unit Maine Yankee Date 850603 Completed By T.R. Anderson Telephone 207-882-6321 MONTH May 1985 .

Day Average Daily Power Level Day Average Daily Power Level F

(MWe-Net) (MWe-Net) 1 ...................... 261 16...................... 829 2....................... 775 17...................... 824 3....................... 847 18...................... 825 4....................... 792 19...................... 826 5....................... 9 20...................... 828 6....................... 60 21...................... 828 7....................... 372 22...................... 820 8....................... 702 23...................... 827 9....................... 848 24...................... 823 10...................... 25...................... 825 719[

11...................... 757 26...................... 821 12...................... 817 27...................... 824 13...................... 834 28...................... 827 14...................... 826 29...................... 831 15...................... 827 30...................... 813 31....................... 824

UNIT SHUTDOWNS AND POWER REDUCTIONS Docket No. 50-309 Unit Maine Yankee Date 850605 Completed By K.L. Embry Telephone 207-882-6321 Report Month May 1985 No. l 3-85-8  : LR to 55% LR to 80%

______ _______a_ ___________________e___ -

---

___________l____________________

Date  ! 850504 850510 l 850511

______________*______-- --________e__________. ,________ '

Type (1)  : S l F  ! F a e 1 l Duration (Hrs): 38.1  : O l 0

______________e___-__________ _e____________________ '

l i  :

Reason (2) i B B l H l 1  ! .

Method (3)  ! 1 i N/A l N/A

_______-- __ =* ____________________e__- _______________*________________

LER # l N/A  ! N/A  : N/A

______________i_________ '

____________________e____________________

System Code (4)! HA  : HH RC

______________*_____________________s_______

• _ _ _ _ _ _ _ _ _ _ _ - _ _ = - - - - - = - _ _ = - - - - - _

l  !

Component i GENERA-D  ! PUMPXX-B l N/A Code (5)  !  !

______________a_____________________'. ____________________>____________________ .

i  !  !

! Shutdown plant to  ! Reduced power to  ! Reduced power i replace generator 1 place motor driven because of low

! exciter diodes.  ! feed pumps in  : symmetric offset.

i service and to Cause and l i remove the steam  :

Corrective  ! l driven feed pump i Action  : Ifrom service due to

! excessive vibration.

l  ! l l l l l l  !

l l  !

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • A*******************

1. F: Forced 2. Reason: 3. Method:

S: Scheduling A-Equipment Failure 1-Manual B-Maintenance or Test 2-Manual Scram .

C-Refueling 3-Automatic Scram

4. Exhibit G-Instructions D-Regulatory Restriction 4-Other (Explain) for Preparation of Data E-Operator Training &

Entry Sheets for License Examination Licensee Event Report F-Administrative 5. Exhibit I-(LER) File (NUREG.0161) G-Operational Error Same Source

• H-Other (Explain)

• Power was reduced to maintain symmetric offset within limits.

m .

Docket No. 50-309 Unit Maine Yankee Date 850605 Completed by K.L. Embry Telephone 207-892-6321 Report Month May 1995

SUMMARY

OE OPERATING EXPERIENCES At the beginning of the month the plant .was shut down.

On 1 May the generator was phased to the grid and a power escalation began.

On 2 May the plant was at 100% power.

On 4 May a power reduction began in order to remove the generator from the grid so that generator exciter diodes could be replaced.

On 5 May the generator was phased to the grid and a power escalation began.

Because of chlorides ~in the steam generators power was maintained less 30% until 6 May, at which time a power escalation to 100% began.

On 9 May the plant was at 100% power.

On 10 May power was reduced to 55% to place the motor driven feed pumps in service and remove the steam driven feed pump from service because of excessive vibration of the steam driven feed pump.

On 11 May power was increased to 94%. However, because of symmetric offset concerns power had to be reduced to 80% the same day. Later later on May 11 power was increased to 97%.

The plant remained at 97% power for the remainder of the month. Using the motor driven feed pumps 97% power is the maximum power attainable.

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MAIRE HARHEE ATOMICPOWERCOMPARUe avausra$ain"g%

(207) 623-3521 i

$9'.

G June 10, 1985 MN-85-ll3 GDW-85-169 Office of Resource Management United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. Richard A. Hartf* eld, Chief Management Information Branch

References:

(a) License No. OPR-36 (Docket No. 50-309)

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

Subject:

Maine Yankee Monthly Statistical Report

Dear Sir:

Enclosed you will find the Monthly Statistical Report for the Maine Yankee Atomic Power Station for May, 1985.

Very truly yours, MAINE YANKEE ATOMIC POWER C0bPANY

$ 2.

G. D. Whittier feyLicensingSectionHead GDW/bjp Enclosures cc: Mr. James R. Miller Dr. Thomas E. Murley Mr. Cornelius Holden

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