ML20050C765

Monthly Operating Rept for Dec 1980

ML20050C765
Person / Time
Site:	Maine Yankee
Issue date:	01/12/1981
From:	Bernard D Maine Yankee
To:
Shared Package
ML20050C764	List: ML20050C763 ML20050C765
References
NUDOCS 8204090338
Download: ML20050C765 (6)

Text

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MAINE YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 80-12 FOR THE MONTH OF DECEMBER, 1980 O

G204090338 810112 PDR ADOCK 05000309 R

PDR

e OPERATING DATA REPORT DOCKET NO. 50-309 DATE 310112 C051PLETED BY D. M. Bernard TELEP110NE 1.17-872-8100,X2390 OPERATING STATUS Notes M ine Yankee I. Unit Name.

De c ernbe r, _1980 Power Icvel restricted by

2. Reportin: Period:

7630

3. Licensed Thermal Power (a!Wt):

steam flow t.hrough the low 864

4. Namepbte Rating (Cross SIWE):

gg 825

5. Desi:n Electrical Rating (Net SIWE):

6. Sf aximum Dependable Capacity (Cross SIWE): _850 810

7. Stasimum Dependable Capacity (Net 5!We):

8. If Chan:es Occur in Capacity Ratings (1: ems Number 3 Through 7) Since f.ast Report, Cite Reasons:

" 9. Power Lese! To Which Restricted.lf Any (Net 5fWe):

864 Mye (s97)

See Notes

10. Ressons For Restrictions. lf Any:

This 5f onth Yr. to Date Cumulative 744.00 _

8,784.00 II. !! outs in Reportin2 Period 412.53 _

6.545.97 57,755.97

12. Number of !!ours Reactor Was Critical 0.00 0.00 0.00

13. Reactor Resene Shutdown Hours 406.33___

6,340.44 55,858.25

14. Ilours Generator On Line 0,00 __

0.00_

0.00

15. Unit Reserve Shutdown Ifours 939,341.00 _ _14,136,146.00 119,378,229.00

16. Cross Thermal Ener;y Cencrated (5tWil)

17. Cross Electrical Ener;y Cencrated (5tWil) 30 M 32,3Q_.

4.628.980.00 39.202.160.00 295,149.00___

4,404,138.00 _37,231,325.00

18. Net E ectrical Energy Generated ($1Wil) 5 4. 61___

72.18 78.23

19. Unit Service factor 54.61 72.18 78.23

20. Unit Availability Factor

21. Unit Capacity factor (Using SIDC Net) 4 &dE_.

61.90 67.37 48.09 60.77 65.l_8

22. Unit Capacity factor (Using DER Net) 7.48 45.39 -

11.88 _

23. Unit Torced outa;e Rate

24. Shutdowns Schedu!cd Oser Nest 6.\\1onths (Typc.Date.and Duration of Eacht:

25. If Shut Duwn At End Of Report Pesiod Estimated Date of Startup:

Tor ccast Achies 1

26. Units in Test 5:a u. (Prior to Commercial Operation):

INITI A L CRITICA LITY INITIA L El.ECTRICITY Coil \\1ERCI tt OPER ATION

'(4/77)

AVERAGE DAILY UNil l'OhER LLVEL

' DOCKET No.

50-309 UNIT ffafnc Yank:'c DATE _810_112 COMPLETED BY

-D. M. Bernard

~

617-872-8100 X239/

TELEPilONE MONTil _.J!ECEM H ER u_9.__80 l

DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe Ner)

(MWe Net)

• O 651 17 0

2 652 13 652 19

~

0 3

4 655 20 0

196 5

63.6 21 790 6

742 22 791 61.

23 7

813 0

21 8

817 0

25 9

810 10 0

26 744 0

27 11 815 0

28 12 815 0

29 13 818 14 0

30 0

31 81.6 15 16 0

INSTRUCTIONS On this forrnst. list the average daily unit power leselin MWe Net for each day in the reporting anonth.Compure to the nearen whole megawatt.

1 (9/77) e i

L ___

4 UNITSilVTDOWNS AND POWER REDUCTIONS DOCKET NO.

50-309 UNITNAME Maine Yankee DATE 810112 COMPLETED 11Y D. M. Bernard REPORT MONTil p ersenr4 - 1980 TELEPl!ONE 617-872-8100 X23E Sheet 1 of 2 E

t

.$?

.53 Licensee 53, Cause & Currective No.

Dale R

5g ji5 Event p

'e.

Ai.iion in

$E 5,

.3i 5 y Report a vO 5 O.

Preveni Recurrence H

U

=Q L.

R.

11/30/80 U

143.97 A

1 N/A HC HTEXCH-D Load reduction was required to allow to thru sandb. lasting of the main condenser 80%

12/6/80 tubesheets.

Galvanic corrosion and erresion of the tubesheets was dis-

~

covered during a recent load reduction.

The cause of the corrosion /errosion is due to flaking off of a shellac coating which had b'cen previously applied to the tubesheets.

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

14-80-5 12/7/80 U

337.67 A

1&3 N/A CB PUMPXX-B A load reduction to take the plant off-thru line due to an RCP seal failure was in 12/20/80 progress.when the turbine EHC load limit control stuck in the " lower" mode initiating a rapid load drop which caused a plant trip.

The cause for the stickine load limit control could not I

2 3

4 Cont'd on Sheet '

12: fus s ed Iteason:

Method:

Extiibit C. Instruenons 5: Sclieduled A.Eignipinen: Failure (Explain) 1 Manual for Pieparation of Data B. Maintenance or Test 7 Manual Sersin.

Entry Sheets l'or Licensee C Itcfueling 3 Automatic Scram.

F. vent llepuri (LElt) Fde INUltEC.

D.Itegulainiy llestriction 4 Other(Explain)

(.161 )

!! Opciaint Training & License Examination I: Adininiueative G Opesaiional 1.isor (lixplain)

Exhibit I. Same Somee r8/17) ll Dihes (Empi.iin)

~

s

I UNITSilUTDOWNS AND POWER REDUCTIONS DOCKET NO.

50-309 i

UNIT NAME Maine vankee DATE 810112 REPORT MONT;I DECEMBER. 1980 COMPLETED BY D. M. Fernard TELEPilONE M 7-872-9100 X23E Sheet 2 of 2 I

=.rs.B

-C C,,.

rs y

Nii.

Date E

h 3 5U U " "ICC b'u h*3 Csuse & Corrective u

Event 13 9

Action to 4

53 g,

.g 3 e Report e in U CU Prevent Itceurrence oO m

• E{

6 c

o i

be determined, il & 2 RCP seal car-tridges were replaced, During plant heatup, #2 RCP seal cartridge indicated 2 failed stages, The-Plant was cooled I

down and #2 RCP seal cartridge was again replaced, L.

R.

12/27/80 U

23.67 B

1 N/A HC HTEXCH-D Condenser t'abe leak % 1 tube plugged j

6 to thru in the "B" waterbox.

80%

12/28/80 I

2 3

4 F: finsed Iteason:

Method:

Exhibii G Instructions S: Solicit utest A.riinipment Failure (Explsin) 1 Manual for Piccaration of Data

[1. Maintenance of Test 7 Manual Scrain.

Entry Sheets lor Licensee C Itefueling

3. Automatic Serain.

Evens 1(eport (Llitti Fue (NUllEC-D.Itegulainty 1(esitiction 4 Ottic:(Explain) 0161) li Opeutor Tiaining & Ucense Examination 1: Ailminiuulive G (3penali enal I a sur (limplain)

Exhibil 1 SJme Sousee 19/ll) li-thheilEmpt in)

J

DOCKET NO.

50-309 UNIT Maine Yankee DATE R10112 CO IPLETED BY D. M. Bernard 617-872-a100 X2390 TELEPHONE REPORT MONTl[ DECEMBER,1980

. /

SU' NARY OF OPERATING EXPERIENCES At the beginning of the month the plant was at 80% load to allow sandblasting of the condenser tubesheets to remove a shellac coating.

Local flaking of the coating had led to accelerated galvanic corrosion.

By December 6th the sand-blasting was completed a'nd the plant was back to full load.

On December 7th, the second of four stages of #1 RCP seal cartridge failed.

One stage had failed previously.

Administrative controls require that the seal assembly be changed when 2 of the 4 stages fail.

A plant shutdown commenced to permit t.he seal repair.

During the load reduction, the tu'rbine EHC load limit control stuck in the " lower" mode which resulted in a~ plant trip.

No cause for the f ailure of the load limit control could be found.

The Plant responded normally to the trip.

Plant cooldown continued and work commenced In addition to changing #1 RCP seal car-on replacing ill RCP seal cartridge.

it was decided to also change #2 RCP seal cartridge which aircady had

tridge, one failed stage.

Following change-out of #1 and 2 RCP seal cartridges, Plant heatup commenced.

that 2 of As RCS pressure was increased during the heatup, it became apparent the 4 stages of the newly replaced #2 RCP seal cartridge were not performing The Plant was cooled back down a pressure breakdown or were essentially failed.

again and the #2 KCP seal cartridge was repaired.

Plant heatup commenced again on December 20th.

The Plant was phased to the grid on December 21st and reached full load the following day.

On December 27th, a load reduction to 80% was performed to locate and plug a One tube was found Icaking and plugged and the Plant Icaking condenser tube.

was back to full load the following day.

"Ihe Plant remained at full load for the remainder of the month.

.