ML19208A730

Monthly Operating Rept for Aug 1979

ML19208A730
Person / Time
Site:	Maine Yankee
Issue date:	09/12/1979
From:	Sjogren R Maine Yankee
To:
Shared Package
ML19208A729	List: ML19208A728 ML19208A730
References
NUDOCS 7909170380
Download: ML19208A730 (5)

Text

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MAINE YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 79-08 FOR THE MONTH OF AUGUST, 1979 UUU 70 380 Wi: :iB

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OPERATING DATA REPORT

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DOCKET NO. 50-309 DATE 790912 CO51PLETED BY R.M.

Siogren TELEPHONE N '> 30o-9011 X2281

_ OPERATING STATUS

1. Unit Name:

Maine Yankee Notes l

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2. Reporting Penod:

Aueust 1979

3. Licensed Thermal Power (31Wt):

2,630

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4. Nameplate Rating (Gross 51We):

825

5. Design Electrical Rating (Net 31We):

6. Sfaximum Dependable Capacity (Gross MWe):

850 810

7. Sfaximum Dependable Capacity (Net 51We):

8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report. Give Reasons:

9. Power Level To Which Restricted. If Any (Net 31We).

864 (97%)

10. Reasons For Restrictions. If Any:

Power level restricted by steam flow through the LP Turbines.

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This 5f onth Yr..to.Date Cumulative II. Hours in Reporting Period 744 5,831

12. Number Of Hours Reactor Was Critical 744 3,911.44 48,955.06

13. Reactor Reserve Shutdown Hours 0

0 0

14. Hours Generator On.Line 744 3,835.59 47,358.76

15. Unit Reserve Shutdown Hours 0

0 0

16. Gross Thermal Energy Generated (31WH) 1,858,450 9,301,090 100,415,451

17. Gross Electrical Energy Generated (51WH) 610.070..

3.009.830 32,967,640

18. Net E!ectrical Energy Generated (SIWH) 602,644 3,011,494 31,299,690

19. Unit Service Factor 100 65.8 79.3

20. Unit Availability Factor 100 65.8 79.3

21. Unit Capacity Factor (Using SIDC Net) 100.0 63.8 68.3 98.2 62.6 65.9

22. Unit Capacity FactorIUsing DER Net)

23. Unit Forced Outage Rate 0

34.2 7.1

24. Shutdowns Scheduled Over Next 6 afonths (Type. Date,and Duration of Each):

Scheduled to meet the recuirement of I & E Bulletin No. 79-13 September 1,1979 for four weeks.

25. If Shur Down At End Of Report Period. Estimated Date of Startup:

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

Forecast Achieved INITIA L CRITICALITY INITIAL ELECTRICITY CONI 51ERCIAL OPERATION Jc

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-309 UNIT Maine DATE 790912 CO3fPLETED BY R.M. Sjogren (617) 366-9011 TELEPHONE X2281 a!0 NTH August 1979 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe Net)

(MWe-Net) 755 823 37 2

818 gg 826 3

818 gg 837 4

696 20 744 5

809 21 828 6

819 22 830 s

7 825 23 829 8

826 24 828 9

828 25 826 10 832 26 798 11 837 27 782 2

836 736 23 13 838

9 824 34 839 30 823 15 838 3j 733 INSTRUCTIONS On this format.!ist tne average daily unit power levelin MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.

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UNIT SilUIDOWNS AND POWER REDUCTIONS DOCKET NO.

50-309 UNil NAME Maine N

g DATE 790912 g

COMPEET En liy R.M.

Sjogren j,Q REl' ORT MONill August 1979 g

TELI;PilONE (617) 366-9011 C) m X2281 3

hi Canse & Correceive No.

Date E.

e Event

("g gg Atijnn in 4

yg g

c 3 3 (7: y RcP"88 8 "3 '

o-E g

Prevent itecnrience O

L.R.

8/4/79 S

32.5 B

1 NA NA NA Turbine Valve Testing to 76%

8/5/79 L.R.

8/17/79 F

31.0 A

1 NA IIF llTEXCll-D Condenser Tube leak in the "B" to 75%

8/18/79 waterbox-1 tube plugged.

L.R.

8/20/79 F

20.75 A

1 NA IIF llTEXCll-D Condenser tube leak in the "D" to 75%

8/21/79 waterbox-1 tube plugged.

L.R.

8/26/79 F

16.08 A

1 NA 11F llTEXCil-D Condenser tube leak in the "A" to 77%

8/27/79 waterbox-1 tube plugged.

L.R.

8/27/79 F

16.16 A

1 NA IIF llTEXCil-D Suspected condenser tube leak - none to 77%

8/28/79 found.

L.R.

8/31/79 F

13.17 A

1 NA IIF llTEXCil-D Suspected condenser tube leak - none to 75%

found.

I 2

~3 4

11 l'oited Reason:

Methoil:

Exhiliit G - Instinctions S. Sthedofed A l'quipnient Failure (Explaia)

I Mannal for Picpar.ition el Data 11Staintenance ui Test 7 Mannal Serain.

Entry Sheets In I. ice nsee C-Itclocling 3 Antornatic Serain.

Event Repnii (l.I'Itl I de (Nilitl.G.

D Regulatory itestriction 4 Other (lixplain) 01611 I? Operator l'eaining & license I!xamination l' Ailmini.t sative 5

G Operational i isos (l'.xplain)

Entnbit 1 Same Sonste 07/17) 11 Othen Ilimplain) 9

DOCKET NO.

50-309 UNIT Maine DATE 790912 COMPLETED BY R. M. Sjogren TELEPHONE (617) 366-9011 X2281 REPORT MONTH August 1979 SUMLARY OF OPERATING EXPERIENCES At the beginning of the month the plant was operating at s97% reactor power limited by the 864 MRe maximum load permitted on the lower pres-sure turbine blading.

On August 4 a load reduction to 76% was performed to allow surveillance testing of the turbine valves. Power was back at full load the follow-ing day.

Load was reduced to %76% on 5 additional occasions during the remainder of the month to locate and plug leaking condenser tubes.

3 leaking tubes were located and plugged.

At the end of the month the plant was at 75% attempting to locate a possible condenser tube leak.

Commencing at 0001 on September 1, 1979, a load reduction from 75% was initiated bringing the plant of f line for the scheduled 4-week outage to perform feedwater line inspections required by IE Bulletin No. 79-13 and also to perform scheduled maintenance.

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