ML19323C559

Monthly Operating Rept for Apr 1980

ML19323C559
Person / Time
Site:	Maine Yankee
Issue date:	04/12/1980
From:	Beers F Maine Yankee
To:
Shared Package
ML19323C556	List: ML19323C555 ML19323C559
References
NUDOCS 8005160328
Download: ML19323C559 (5)

Text

S0051603/1!I 8

O v

MAINE YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 80-04 FOR THE MONTH OF APRIL, 1980 l

OPERATING DATA REPORT DOCKET NO. 309 DATE Rnna19 COMPLETED BY F.

G.

Beers TELEPHONE 617-366-9011' X2215 OPERATING STATUS Maine Yankee Notes

1. Unit Name:

Power restricted by

2. Reporting Period:

April 1980 steam fics through the LP

3. Licensed Thermal Power (>!Wt):

2630 Turbine.

864

4. Namepiste Rating (Gross 5!We):

825

5. Desi n Electrical Rating (Net 31We):

2 850

6. 31sximum Dependable Capseity (Gross 31We):

report period.

810

7. Sf aximum Dependsble Capacity (Net S!We):

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):

10. Ressons For Restrictions.!f Any:

This 5fonth Yr..to.Date Cumulative 719*

2,903.00

11. Hours In Reporting Period

12. Number Of Hours Resctor Was Critical 710.93 1.480.50 52.690.50 0.0 0.0 0.0

13. Resetor Reserve Shutdown Hours

14. Hours Generstor On.Line 707.70 1.350.06 -

50,867'87

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (31WH) 1.719.186.00 2.717.275.00 107.979.358.00

17. Gross Electrical Energy Generated (MWH) 57R R10._00 901.170.00 15.47A.550.00 18l Net E!ectrical Energy Genersted (MWH) 552,202.00 855,275.00 33,682,462.00

19. Unit Service Fsetor 98.43 46.51 77.63

20. Unit Availability Factor 98.43 46.51 77.63

' 21. Unit Capseity Factor (Using 3!DC Net) 94.82 36.37 66.73 j

22. Unit Capacity Factor (Using DER Net) 93.09 35.71 64.47 1.57 4.84 6.83

23. Unit Forced Outsge Rate

24. Shutdowns Scheduled Over Next 6 Stonths (Type. Date.snd Durstion of Each1:

l l

l

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

26. Units In Test Ststus (Prior to Commercial Operation):

Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

'(9/77).

AVERAGE DA!LY UNIT POWER LEVEL

• DOCKET NO.

50-309 UNIT Maine Yankee 800412 DATE F. C. Beers C05fPLETED BY 617-366-9011 X2215 TELEPHONE 5!ONT11 April 1980 DAY AVERAGE DAILY POWER LEVEL

^

DAY AVERAGE DAILY POWER LEVEL (51We-Net)

C.!We Net) 781

7 820-2 437 13 822 3

522 19 821 4

_ 804 20 824 5

811 21 816 011 6

22 819 814~.

7 23 821 8

813 24 791 9

All 25 749 10 810 26 634 812 1I 27 628-717 32 814 23 812 13 29 721 34 816 30 714 IS 824 31 16 822 INSTRUCTIONS On this formst. list the aversge daily unit power levelin 31We-Net for each day in the reporting month. Compute to the nearest whole me swatt.

(9/77) 9 0

UNITSilUTDOWNS AND POWER REDUCTIONS DOCKET NO.

50-309 UNIT NAME flaine Yankee DATE 800412 COMPLETED fly F.

C.

Beers REPORT MONTil April 1980 TELLPl!ONE 617-166-9011 x2215 "i

.s_

e.

.3m e e

.= c g

m.s x Licensee c-r.

c 7.

Ca.ise & Corrective No.

Date g;

3g

,g g 5 Event g

h Action to

}u Psevent itecursence

[25 5, j5g Report #

in O 6

L.R. ti 3/29/80 F

86.18 11 1

N/A CC ZZZZZ Load reduction to help leach residual 20%

thru chlorides out of the steam generators 4/2/80 4-80-5 4/2/80 F

11.30 A

3 N/A IA INSTRU-T A grounded capacitor in a S/C level transmitter led to a reactor trip during routine RPS surveillance testing.

L.R.

4/24/80 S

157.67 11 1

N/A RC ZZZZZ Load reduction due to increasing to plus core D/P. NII 0ll was added to help 4

75%

remove the apparent buildup of crud on core surfaces.

I 2

3 4

F: Fost ed Iteason:

Method:

Exhibit G -Instructions S: Sdicduled A Equipment Failuie(Explain) 1 Mannal for heparation of Data fl Maintenance of Test 7 Manual Scrain.

Entry Sheets fin I.iecusee C IteIucting 3 Automatic Scram.

Event Itepint (LElt) File INUltEG.

D.Hegulatony itesiriction 4 Other(lixplain) 0161) li Opciator Tsaining & License Examination F Aihninistiative 5

G Operational I not (limplain)

Exhibit I Same Source t's/17)

Il-Othes (limplain)

o DOCKET NO.

50-309 UNIT Maine Yankee DATE 800412 COMPLETED BY F. C. Beers TELEPHONE 617-366-9011 X2215 REPORT MONTH April 1980 SIM!ARY OF OPERATING EXPERIENCES At the beginning of the month the plant was in the process of a slow (1%/hr.) power escalation from N92% to full load following a load reduction to help soak out chlorides in the steam generator.

At 1311 hours0.0152 days <br />0.364 hours <br />0.00217 weeks <br />4.988355e-4 months <br /> on 4/2/80, a plant trip occurred (from 96%) during routine RPS surveillance testing. The cause was due to a grounded capacitor in one of the steam generator level transmitters. The reactor was taken critical later that day and the unit was phased to the grid at 0029 ho,urs on 4/3/80.

The plant remained at full load until 4/24/80 when reactor power was reduced to 90%. The reason for the load reduction was due to an increase in the reactor core D/P. It is believed that increased crud deposits on core surfaces have caused the increase in D/P. On 4/25/80, load was dropped from 90% to 75% and NH 0H was added to the RCS in an attempt to 4

remove some of the crud buildup.

Following the NH 0H additions (which were not considered successful 4

as far as crud cleanup considerations), power was raised up.to 85% and held there for the remainder of the month. Preparations were made to take the plant off the line over the 5/3/80-5/4/80 week-end, cool the plant down and add H 0 as a mechanism for core crud removal.

22 e