ML19261B294

Monthly Operating Rept for Jan 1979

ML19261B294
Person / Time
Site:	Prairie Island
Issue date:	02/01/1979
From:	Hunstad A NORTHERN STATES POWER CO.
To:
Shared Package
ML19261B293	List: ML19261B292 ML19261B294
References
NUDOCS 7902150282
Download: ML19261B294 (8)

Text

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NARRATIVE SUvMARY OF OPERATING EXPERIENCE DOCKET NO. 50 282 UNIT Prairic Island No. 1 DATE 790201 C0!!PLETED BY A. A. Hunstad TELEPl!ONE 612-388-4767 o

j MONTH January 1979 On January 5th, No. 1 seal leakoff on No, 11 RCP dropped sharply and the stand-n, pipe began overflowing, indicating increased flow through No. 2 seal. A cool-E down was planned and the load reduction for it initiated. During the load drop 5 it was noted that reducing the pressure in the volume control tank caused an increase in No. 1 seal leakoff. As this indicated that the No. 2 seal was still functioning--albeit at an increased seal flow-operation was continued and a special procedure developed to monitor the flow through the No. 1 seal. Seal performance seems to be improving slightly. The unit is operating at 100% power.

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- 1 790215O M A

DAILY UNIT POWER OUTPUT DOCKET NO. 50-282 UNIT Prairie Island No. 1 DATE 790201 COMPLETED BY A. A. Hunstad TELEPHONE 612-388-4767 MONTH January 1979 DAY AVERAGE LOAD MWe-Net DAY AVERAGE LOAD MWe-Net g 1 516 17 _

513 m

516 513

• 2 18 7

[e 3 515 19 512

{ 4 515 20 514 5 513 21 512 5, 6 406 22 512 7 513 23 513 8 510 24 514 9 513 25 514 10 513 26 514 11 514 27 448 12 513 28 513 13 514 29 513 14 515 30 515 15 514 31 515 16 514 Average loads above 503 MWe-Net are due to cooler condenser circulating water.

OPERATING DATA REPORT DOCKET NO 50-282 DATE 790201 COMPLETED BY A. A. Hunstad OPERATING STATU_S TELEPHONE 612-388-4767

1. Unit Name: Prairie Island No. I

2. Reporting Period: January 1979 Notes

3. Licensed Thermal Power (MWt): 1650

4. Nameplate Rating (Gross We): 593 l

5. Design Electrical Rating (Net MWe): 530

6. Maximum Dependable Capacity (Gross MWe): 534 3 7. Maximum Dependable Capacity (Net MWe): 503 g 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report:

S Give Reason: MDC Gross revised to 534 Mwe and MDC Net revised to 503 Mwe based on testing.

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[ 9. Power Level To Which Restricted, If Any (Net MWe):

').

Reasons for Restrictions, If Any:

This Month Yr-To-Date Cumulative

11. Hours In Reporting Period 744 744 44952

12. Number Of Hours Reactor Was Critical 744.0 744.0 35433.1

13. Reactor Reserve Shutdown Hours 0.0 0.0 4455.1

14. Hours Generator On Line 744.0 744.0 34461.2

15. Unit Resorve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 1208813 1208813 53489395

17. Gross Electrical Energy Generated (MWH) 401110 401110 17432000

18. Net Electrical Energy Generated (MWH) 377985 377985 16306417

19. Unit Service Factor 100.0 100.0 76.7

20. Unit Availability Factor 100.0 100.0 76.7

21. Unit Capacity Factor (Using MDC Net) 101.0 101.0 72.1

22. Unit Capacity Factor (Using DER Net) 95.9 95.9 68.4

23. Unit Forced Outage Rate 0.0 0.0 12.3 Sht.tdowns Scheduled Over Next 12 Months (Type, Date and Duration of Each):

(" s . Refueling, April 79, 5 weeks.

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

UNIT S!RITDGSNS .WD pO'.ER 't23'JC TIONS

• DOCKET NO. 50-282 RSPORT MONTH January 1979 UNIT TJiZ Prairia Island No. 1 MTE 790201 ~

COMPL2T23 3Y A. A. Hunstad T2LEPdo.1E 512-133-4767

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. 790105 S 0.0 B , N/A N/A N/A N/A Reduced power to about 50% to do 2

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the monthly turbine valves test.

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@j 790105 i F 0.0 , H N/A N/A N/A N/A Power reduced in anticipation of 5 , having to cooldown for maintenance

• 1 1 of #2 seal en No. 11 RCP.

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F: Forced Reason Method: lxhibit.G-In-S: Scheduled A-Equipment Failure (Explain) 1-Manual structions for B-Maint2 nance or Test 2-Manual Trip Preparation of C-Refueling 3-Automatic Trip Data Entry Sheets D-Regulatory Restriction 4-Other (Explain) for Licensee Event E-Operator Training,& License Examination Report (LER) File F-Administrative (NUREG-0151)

G-Oper nion11 Error (F~. plain) .

3 H-Other (2xplain Exhibit 1 - G.r c3 3 r:a

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE DOCKET NO. 50-306 UNIT Prairic Island No. 2 DATE 790201 COMPLETED BY A. A. Hunstad TELEPHONE 612-388-4767 o

j MONTH January 1979 m Operation this month was routine.

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DAILY UNIT POWER OUTPUT DOCKET NO. 50 306 UNIT Prairie Island No. 7 DATE 19U201 COMPLETED BY A. A. Hunstad TELEPHONE 612-388-4767

(

h0 NTH January 1979 k

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DAY AVERAGE LOAD MWe-Net DAY AVERAGE LOAD MWe-Net

$ 1 524 17 519 E4 -

523 519

- 2 18 3

521 19 517

$ 4- 521 20 521 m

5 521 21 520

.. 6 519 22 519 7

486 23 519 8 514 24 521 9

519 25 519 10 519 26 518 11 520 27 518 12 514 28 520 13 521 29 517 14 521 30 519 15 521 31 520 16 519 Average loads above 500 MWe-Net are due to cooler condenser circulating water.

9

= . . .

OPERATING DATA REPORT DOCKET NO 50-306 DATE 790201 COMPLETED BY A. A. Hunstad OPERATING STATUS TELEPHONE 612-388-4767

1. Unit Name: Prairie Island No. 2

2. Reporting Period: January 1979 Notes

3. Licensed Thermal Power (Wt): 1650

" 4. Nameplate Rating (Gross We): 593

5. Design Electrical Rating (Net MWe): 530

6. Maximum Dependable Capacity (Gross We): 531 3 7. Maximum Dependable Capacity (Net We): 500 g 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report:

$ Give Reason: MDC Gross revised to 531 Mwe and MDC Net revised to 500 Mwe based on g' testing.

[ 9. Power Level To Which Restricted, If Any (Net We):

1. Reasons for Restrictions, If Any:

This Month Yr-To-Date Cumulative

11. Hours In Reporting Period 744 744 36070

12. Number Of Hours Reactor Was Critical 744.0 744.0 ~1187.6

13. Reactor Reserve Shutdown Hours 0.0 0.0 1378.7

14. Hours Generator On Line 744.0 744.0 30479.6

15. Unit Reserve ahutdown Hours 0.0 0.0 0.0

16. Cross Thermal Energy Generated (MWH) 1220393 1220393 47239678

17. Gross Electrical Energy Generated (MWH) 408860 408860 14996600*

18. Net Electrical Energy Generated (MWH) 385735 385735 14031323

19. Unit Service Factor 100.0 100.0 84.5

20. Unit Availability Factor 100.0 100.0 84.5

21. Unit Capacity Factor (Using MDC Net) 103.7 103.7 77.8

22. Unit Capacity Factor (Using I>ER Net) 97.8 97.8 73.4

23. Unit Forced Outage Rate 0.0 0.0 5.9

(~ .'+.Shutdowns Scheduled Over Next 12 Months (Type, Date and Duration of Each):

Refueling, December 79, 5 weeks.

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

UNIT SHUTDOTIS AND POWER REDUCTIONS

• DOCKER No.30-306 '

REPORT MONTH January 1979 N. rairie Island No. 2 DATE 790201 COMPLETED 3Y A. A. Hunstad TELEPH0.iE 512-333-4767 l , r-- ---

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l F: Forced Reason Method: Exhibit.G-In-S: Scheduled A-Equipment Failure (Explain) 1-Manual structions for B-Maintenance or Test 2-Manual Trip Freparation of C-Refualing 3-Automatic Trip Da!.4 Entry Sheets D-Regulatory Restriction 4-Other (Explain) for Licensee Event E-Operator Training & License Examination Report (LER) Fila F-Administrative (NUREG-0151)

G-Oper nional Error (7.xplain)

H-Other (Explain 5 Exhibit 1 - Gr2 ?mr:2