ML20050B730

Monthly Statistical Rept 80-11 for Nov 1980

ML20050B730
Person / Time
Site:	Maine Yankee
Issue date:	12/10/1980
From:	Bernard D Maine Yankee
To:
Shared Package
ML20050B725	List: ML20050B724 ML20050B730
References
NUDOCS 8204070294
Download: ML20050B730 (5)

Text

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1 MAINE YANKEE NUCLEAR POWER STATION :

i MONTHLY STATISTICAL REPORT 80-11 FOR THE MONTH OF NOVEMBER, 1980

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poana Bemmao 8'- 6t7 -872 -Tte OPERATING DATA REPORT DOCKET NO. 309 DATE E01210 1

7 CO51PLETED BY n'"W nr7. nard TELEPlf0NE 617-366-9011 X2215

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N '/ O OPERATING STATUS 2 6 7 ~ (m? 7 Q -f Z l

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Maine Yankee Notes

1. Unit Name:

2. Reportin; Period:

November. 1980 Power level restricted by 2630 steam flow through the LP

3. Licented Thermal Power (51Wr):

864 turbine.

4. Nameplate Rating (r;ross 51We):

825

5. Design Electrical Rating (Net 51We):

6. Sfaximum Dependable Capacity (Grass 51We):

h 7'?;7 4!M 8

8

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 Lesel To Which Restricted.lf Any(Net 5!We):

864 MWe (s97%)

10. Reasons For Restrictions. !f Any:

See notes This Sionth

.Yr. to Date Cumulative 720.00 8.040.00

11. Ilours In Reportin; Period

12. Number Of flours Reactor was Critical 720.00 6.133.44 57.343.44 0.00 0.00 0.00

13. Reactor Reserse Shutdown Hours

14. flours Generator On.Line 720.00 5.934.11 55.451.92 0.00 0.00 0.00

15. Unit Reserve Shutdown liours

16. Gross Thermal Energy Generated (51Wil) 1.796.502.00 13.196.805.00 118.438.888.00

17. Gross Electrical Energy Generated (51WII) 590,500.00,_,

4.319.030.00 38.892.210.00 563,245.00 4,108,989.00 36,936,176.00

18. Net Electrical Energy Generated (31Wii) 100.00 73.81 78.48

19. Unit Service Factor 100.00 73.81 78.48

20. Unit Availability Factor 96.58 63.09 67.56

' 21. Unit Capacity Factor (Using SIDC Net) 94.82 61.95 65.36

22. Unit Cap.icity Factor (Using DER Net) 0.00 8.01 7.01

23. Unit Forced Outage Rate

24. Shutdowns Scheduled Over Ne.st 6 51onths (Type. Date.and Duration of Eacht:

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

26. Units in Test Status lPrior to Commercial Operatiun):

Forecast Achieved INITIAL CRITICALITY INITIA L ELECTRICITY CO3151ERCIA L OPERATION

'(9/77)

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-309 UNIT Maine Yankee DATE 801210 D. M. Bernard C051PLETED BY TELEPHONE 617-366-9011 X2215 MONTH NOVEMBER. 1980

- DAY AVERAGE DAILY POWER LEVEL DAY AVER AGE DAILY POWER LEVEL (MWe-Net)

(51We-Net) 1 808 37 804' 805 18 803 2

806 3

19 715 658 4

808 20 794 5

803 21 803 805 22 6

807 23 806 7

709 g

764 24 802 9

25 651 802 26 672 10 11 800 27 803-803 28 808 12 802 816 13 29 802 14 30 805 805 l

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803 16 l

INSTRUCTIONS On this forrnat. list the average daily unit power levelin SIWE Net for each day in the reporting month. Compute to the nearest whole rne;swatt.

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UNIT SilUTDOWNS AND POWER REDUCTIONS DOCKET NO.

50-309 UNIT NAkt E Maine Yankee DATE 805210 REPORT AIONTil NOVEMBER, 1980 COh!PLETED !!Y D.

M. Bernard TELEPflONE 617-166-9011 x2215 Rh on t 1 nf ?

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g o.s i:t Licensee c r, Cause & Corrective c

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Action in 3 Di j Report #

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oO 88:

g Prevent Itceurtence g

L. R.

11/8/80 S

24.00 B.

1 NA HA VALVEX-C Routine turbine valve surveillance to 11/9/80 testing.

79%

L. R.

11/19/80 U

49.25 A

1 NA HC HTEXCH-D Condenser tube leak in the "C" waterbox to thru 1 tube plugged.

80%

11/21/80 L.R.

11/24/80 U

63.20 A

1 NA HC HTEXCH-D Clean debris off condenser tubesheets to thru and check-out equipment which will be 79%

11/26/80 used to sandblast the tubesheets to remove shellac coating.

L.R.

11/30/80 U

3.97 A

1 NA HC HTEXCH-D Load reduction was required to allow to cont.

plus sandblasting of the main condenser tube 80%

sheets. Galvanic corrosion and errosion of the tubesheets were dis-covered during a recent load reduction.

The cause of the corrosion /errosion g

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hiethod:

Exhibit G-Inst uctions S: Scheduled A riinipment Failure (Explain) 14fanual for l'icp. nation of Data n41aintenance or Test 7 htanual Scram.

Entry Sheets for I.ieensec C Itefueling 3 Automatic Scram.

Eveni iteport (LElt) File INUll!'.G.

D.Itegulatniy itesisiction 4 Other (Explain) 0161)

E Opci. dor Training & License Examination F Ailminisisative S

G Operational I iner (lixplain)

Exhibit I. Same Source l'8/17)

Il-Othen IExplain)

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UNITSilUTDOWNS AND POWER REDUCTIONS DOCKET NO.

50-309 UNIT NAME

!!aine Yankee DA'IE 801210 REPORT MONTil _ NOVEMBER, 1980 COMPLETED tlY - D.

If. Bernard TELEPil0NE 617-v,6-9011 X2215 Sheet 2 of 2 "i

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g o.5 X Licensec c v.,

g7, Cause & Corrective No.

Date a

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,8 Event g, y e '8 Atiion in dE 5,

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• mo ju Prevent Itceurtence g

is due to flaking off of a shellac coating which had previously been applied to the tubesheets.

An impressed cathodic protection system will be installed in the near future.

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Method:

Exhibit G -Insteuctions S: Scheduled A. Equipment Failure (Explain) 1 Manual for Picp.iration of Data Il41aintenance of Test 2 Manual Scram.

Entry Sheets for 1.ieensee C Itefueling 3 Automatic Scram.

Eveni Itepuri (Lliit t Fde INUltl'.G-D.Ites;ulainey itesiriction 4 Other(Explain) 016i!

E-Operator Training & Liccuse Examinatiori F Adminiusative 5

G Ogwiational I.irne (lixplain)

Exhibit i. Same Sonice

('s/17)

Il-Othes (limplain)

DOCKET NO.

50-309 UNIT Maine Yankee DATE 801210 CO.'4PLETED BY

n. M. Bernard TELEPHONE 617-366-9011 X2215 REPORT MONTH NOVEMBER. 1980 SU.41ARY OF OPERATING EXPERIENCES At the beginning of the month, the plant was operating at full load.

On November 8th, a load reduction to 480% was conducted to perform routine turbine valve surveillance testing. The plant was back at full load the following day.

O On November 19th, plant load was dropped to s80% to locate and plug a Icaking condenser tube.

The tube was located and plugged, but another problem was discovered upon entry into the waterboxes.

Several areas of the tubesheet showed indications of galvanic corrosion attack possibly coupled with fluid errosion.

These areas were the result of flaking off of the shellac coating on the tubesheet which was applied after the last refueling when all the con-denser tubes were changed from CuNi to SS.

The plant returned to full load on November 21st while the tubesheet problem was being evaluated and repair methods planned.

On November 24th the plant dropped load again to clean. debris of'f the condenser tubesheets and to test the sandblasting equipment which would be used to remove the shellac coating off the tubesheets. Not all the equipment functioned properly and load was brought back to s97% on November 26th while the equipment was repaired.

On November 30th load was reduced to 80% and sandblasting of the condenser tubesheets commenced.

The plant remained at 80% for the remainder of the month.

Long-term corrective action for the tubesheet corrosion problem will involve the installation of an impressed cathodic protection system.

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