ML19241B418

Monthly Operating Rept for June 1979

ML19241B418
Person / Time
Site:	Maine Yankee
Issue date:	07/12/1979
From:	Sjogren R Maine Yankee
To:
Shared Package
ML19241B417	List: ML19241B416 ML19241B418
References
MOR-790630, NUDOCS 7907170118
Download: ML19241B418 (5)

Text

.

MAINE YANKEE NUCLEAR PC'4ER STATiCN MONTHLY STATISTICAL REPCRT 79-06 FOR THE MONTH OF JUNE, 1979

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OPERATING DATA REPORT DO' NO.

50-300 DATE 790712 COMPLETED BY R.M.

Sio<tren TELEPHONE

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'A6-9011 7.2281 OPERATING ST ATUS

1. Unit Name:

Maine Yankee Notes

• Station Service Trans-former X-26 is out of

2. Reportmg Period:

June 197o service due to a fault

3. Licensed Thermal Power IMWt):

2,630

" the low side leads.

4. Nameplate Rating tGross MWe):

864

!ie t electrical power

5. Design Electrical Rating (Net 31We):

825 should be approximatel;

6. Maximum Dependable Capacity (Gross MWe):

850 16,000 "4H less than

7. Sta.simum Dependable Capacity (Net MWe):

9'O 4i<,w S. If Changes Occur in Capacity Ratings (Items Number 3 Throu;h 7) Since Last Report. Give Reasons:

9. Power Lesel To which Restricted.lf Any (Net SIWE):

None

10. Reasons For Restrictions. If Any:

i

(

This Month Yr..to.Date Cumulative

11. Hours in R2 porting Period 720 4.343

12. Number Of Hours Reactor Was Critical 679.83 2,423.4 47,467.06

13. Reactor Reserve Shutdown Hours 0

0 0

14. Hours Generator On.Line 609.58 2.347.59 45,870.76

15. Unit Resene Shutdown Hours n

0 0

16. Gross Thermal Energy Generated (MWH) 1.398,605 5,566,054 96,680,415 17 Gross Electrical Energy Generated IMWH) 463,780 1,872,140 31,739,950 IS. Net E'ectrical Energy Generated tMWH) 457.437* _ _,

1,S00,373 30,088,569

19. Unit Senice Factor 84.6 54.1 78.8

'0. Unit Avadability Factor 84.6 97.1 co.5

21. Unit Capacity Factor t Using MDC Net) 78.4 51.2 e7.5

22. Unit Capacity Factor IUsing DER Net) 77.0 50.2 65.1

23. Unit Forced Outage Rate 6.5 45.9 7.3

24. Shutdowns Scheduled Over Nest 6 Months (Type. Date, and Duration of Each)-

25. !(Shur Down At E ! Of Report Period. Estimated Date of Startup:

26. Units in Test Status a Prior to Commercial Operationi:

Forecast Achiesed INITI A L CRITICA LITY INITIAL ELECTRICITY CO\\lMERCI\\L OPER ATION

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AVERAGE D Al'.Y L' NIT POWER LEVEL DOCKET NO.

50-309 trNIT Maine Yankee DATE 790712 COMPLETED BY R.M.

Siegren TELEPHONE (617) 366-9011 X2281 5!ONT11 June 1979 DAY AVERAGE DAILY POWEh LEVEL DAY AVER AGE DAILY POWER LEVEL i M We-Net )

(Mwe.Neg; I

O 37 832 2

0 13 834 3

0 19 842 4

0 841 20 5

23 840

,3 6

122 839 283 840 7

73 g

507 839

,4 9

,3.

842 704 10 782 840

6 840 11 791 7

803 840

,3 13 814 836

,9 14 824 837 30 830 g5 3,

le 832 INSTRL'CTIONS On this format. !!st :he aser2;e daily uni: power :evei m MWe Net for each 3:y in the reporting :nonth. Compute to the nearest wncie mepwat!

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M 09 UNIT SilulDOWNS AND POWER ltEDUCTIONS DOULTNO.

UNil NA'lE Itaine Yankee DATE 7 9t1717 COMI'I 1.11:D itY R. M, Sleeren IILPORT MON ~lli. Tune 1979 T ELI PilONE (6171366-9011 X2281 3 u. 3

.2 :-

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,c '4

1. a.censee c_

ri c -r,

c t, Cause & Coirective No.

DJ t e R

5g n

js5 Event

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Action in c5 E 5

35c Repostis d' u gu hevent llecurrence b

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6 3-79-4 3-15-79 F

1982.7 11 1

7 9-005 / O l X-t.

XX SUPORT-X Plant shutdown in accordance with fil(C thru Order due to possible inadequacles 6-5-79 in the seismic loadine, calculations for various pipi z systems.

I 2

3 4

l' l'ini cil It c.non :

Methoil:

1:xinbit G Instrut iions S. St heilnied A 1.pnpment Fadnic (Explain) 1 Mannal for Picp. nation ni Data 11 Maintenance ni Test 7-Mannal Serain.

I:niry Sheets lor I.icensee C Itclocling 3 Aniomatic Scrani.

Eveni Itcpurt (l.I'It) I'de INtilti.G-D llegn!.itory 1(esttittion 4-Ot her (l!.xplJin) 0161) 1: Opciator leaining & Litense Examination 11 Aihninnt eative 5

G Upi national I nos (i uplaia)

Exinhit i. Same Soorte

('8/17 )

11 (Ilhes (limplain)

DOCKET NO.

50-300 UNIT

> Sine vc_nk e e DATE 790712 COMPLETED BY R. M. Sjo2ren TELEPHONE (617) 366-9011 X2281 REPORT MONTH June 1979 SUM'!ARY OF OPERATING EXPERIENCES At the beginning of June, Maine Yankee was still shutdown as a result of an NRC Order to Show Cause related to possible inadequacies in computer codes used by Stone and Webster to analyze seismic loads on various safety related systems.

On May 26, 1979 the Show Cause Order was lifted and preparations were made to return to power.

In the process of RCS heatup, it became apparent that #2 RCP seal cartridge would require replacement.

The plant was cooled down and the seal cartridge was replaced.

Plant heatup began again on May 31, 1979.

By June 5, 1979 the plant was ready to phase te the grid and resume power operations.

In the process of raising generator voltage in preparation for phasing, a fault occurred on one of the low side leads of Station Service t ransfo rmer X-26 shorting it to ground. Although there was no damage to the transfcr=er, the leat. were burned and will require replacement. The high side leads to X-26 were disconnected from the generator output and the unit was synchronized to the grid at 1425 hours0.0165 days <br />0.396 hours <br />0.00236 weeks <br />5.422125e-4 months <br /> on Juae 5.

Traasformer X-26 provides 6.9 KV power from the generator output to the station busses for operating the RCP's and the main feedwater pu=ps.

With X-26 out of service, the station's 6.9 IN busses are being powered by reserve transfor:er X-16.

Pcwer escalatlan continued and on June 16, 1979 Maine Yankee was at essentially full power (^-972) limited to 854 MWe by steam flow considerations through the low pressure turbines.

The p?. ant remained at essentially full load for the remainder of the To'th.

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