ML19347F048

Monthly Operating Repts for Apr 1981

ML19347F048
Person / Time
Site:	Prairie Island
Issue date:	05/01/1981
From:	Hunstad A NORTHERN STATES POWER CO.
To:
Shared Package
ML19347F045	List: ML19347F044 ML19347F048
References
NUDOCS 8105150133
Download: ML19347F048 (8)

Text

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NARFATIVE

SUMMARY

OF OPERATING EXPERIENCE DOCKET NO. 50 282 UNIT Prairie Island No. 1 DATE 610501 COMPLETED BY A.A. Hunstad TELEPHONE 612-388- 1121 MONTH' April- 1981

- The. unit was base loaded this month: no shutdowns.

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• DAILY UNIT POWER OUTPUT DOCKET NO. 50- 282 UNIT Prairie Island No. 1 DATE 810501 COMPLETED BY A.A. Hunstad TELEPHONE 612-388- 1121 MONTH April. 1981 DAY AVERACE LOAD MWe-Net DAY AVERAGE LOAD MWe-Net s

g' 1 516 17 503 x

g 2 515- 18 508

[ 3 513 19 493 e

{ 4 519 20 510 5 518 21 503 6 515 22 501 7 514 23 505 8 510 24 506 9 508 25 505 ,

10 505 26 500 l

11 509 27 497 12 431 28 497 13 502 29 404 14 510 30 499 15 510 31 -

16 506 Average loads above 503 MWe-Net are due to cooler condenser circulating water.

Misc. #11. A-3 i b

OPERATING DATA REPORT DOCKET NO 50- 282 DATE 810501 COMPLETED BY A.A. Hunstad-OPERATING STATUS TELEPHONE 612-388-1121

1. Unit Name: Prairie Island No. 1

2. Reporting Period: es April. 1981

3. Licensed Thermal Power (MWt): 1650

4. Nameplate Rating (Gross MWe): 593

5. Design Electrical Rating (Net MWe): 530

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

$ Give Reason:

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

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z 10. Reasons for Restrictions, If Any:

This Month Yr 's-Date Cunulative

11. Hours In Reporting Period 719 2879 64631

12. Number Of Hours Reactor Was Critical 719.0 2879.0 51046.1

13. Reactor Reserve Shutdown Hours 0.0 0.0 5538.1

14. Hours Generatar On Line 719.0 2879.0 49869.6

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 1168002 4693326 77414007

17. Gross Electrical Energy Generated (MWH) 383020 1559480 25040990

18. Net Electrical Energy Generated (MWH) 360248 1468084 23413691

19. Unit Service Factor 100.0 100.0 77.2

20. Unit Availability Factor 100.0 100.0 77.2

21. Unit Capacity Factor (Using MDC Net) 99.6 101.4 72.0

22. Unit Capacity Factor (Using DER Net) 94.5 96.2 68.4

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23. Unit Forced Outage Rate 0.0 0.0 11.6

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

Refueling,. September 1981 6 r00he.

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

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-e NARRATIVE

SUMMARY

OF OPEPJTING EXPERIENCE DOCKET NO. 50306 UNIT Prairie Island Nd.

DATE tsludul COMPLETED BY A. A. Hunstad TELEPHONE 612-388- 1121 MONTH April. 1981

- The unit was restarted at 2238 on April 8th. At 0043 the next day the unit was taken off for inspection of the 5 generator exciter: it was returned to service at 0500 the same day. At 1344 on April 9th the unit was taken out to 4 perform the turbine overspeed test and at 1440 it was N returned to service. On April 18th at 0024 one control rod a dropped during the control rod exercise test causing a E negative flux rate trip. Repair of a leaking E-H cooler and E a feedwater regulating valve extended this outage to 0142 on April 19th. The unit is at 100% power.

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Misc.#11.A-2

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• DAILY UNIT POWER OUTPUT DOCKET NO. 50- 306 UNIT Prairie Island 50. 2 DATE 810501 COMPLETED BY A.A. Hunstad

-TELEPHONE 612-388- 1121 cf0 NTH-April. 1981 DAY , __

AD MWe-Net DAY AVERAGE LOAD MWe-Net m

f 1 -10 17 496

. 2 -9 18 -13

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3 -9 19 392 E

{ 4 -13 20 :01 5 -16 21 500 6 -16 22 488 7 -16 23 498 8 -17 24 497 9 71 25 301 .

10 231 26 499 11 369 27 494 12 468 28 500 13 480 29 499 14 496 30 503 15 479 31 -

16 478 Average loads above 500 MWe-Net are due to cooler condenser circulating water.

Misc. #11.'A-4 ,

o UNIT Sill!TDOWNS AND P0h'ER REDUCTIONS DOCKET NO. 50- 306 REPol T !!ONTl! April 1981 UNIT N4WE Prairie Island No. F DATE 810501 COMPI.ETED BY EX HunstM-TEI.EP110NE '(312-388 1121 i

--a c o u [u I.icensee e -t u. Cause & Corrective Date $. . 47 S 33 Event 8$ Em Action to

$ $5 E 3 I$ N Ile port # $, O S$ Prevent Recurrence US QV 5 FEN Q) U1 WO O

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su d 810221 S 190.E C 2 N/A N/A N/A Refueling

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• m 810409 S 4.] 11 N/A N/A N/A N/A Shutdown for inspection of the ma n o

5 genera *or exciter, n.

810409 S 1.C B N/A N/A N/A N/A Shutdown to conduct turbine overspeed test.

810418 F 25. H 3 N/A N/A N/A Trip when one control rod dropped during control rod exercise test.

Bad control card was located and replaced. Maintenance on a EW T regulating valve and an E-fi coolec O was also done.

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1  ? 3 4 g F: Forcs! - Reason l'fe thod : Exhibit C-In-S: Schedated A-Erluipment Failure (Explain) 1-flanual structions for B-!!aintenance or Test 2-!!anual Trip Preparatton of C-Refueling 3-Automat ic Trip Data Entry Sheets D-Regulatory Rent riction 4-Other (Explain) for 1.icensee Event E-Operator Training & License Examinat ion Report (I.ER) File F-Administrative (NUREG-0161)

G-Operational Error (Explain) 5 li-Other (Explain Exhibit 1 - Same Source s

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R OPERATING DATA REPART DOCKET No 50- 306 DATE 810501 COMPLETED BY A.A. Hunstad OPERATING STATUS TELEPHONE 612-388-1121

1. Unit Name: Prairie Island No. 2

2. Reporting Period:

• April. 1981

3. Licensed Thermal Power (MWt): 1650' 4 Nameplate Rating-(Gross MWe): 593

5. Design Electrical Rating (Net MWe): 530

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

$ Give Reason:

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

o x 10. Reasons for Restrictions, If Any:

This Month Yr-To-Date Cunulative

11. Hours In Reporting Period 719 2879 55749 .

12. Number Of Hours Reactor Was Critical 533.4 1776.7 48158.5

13. Reactor Reserve Shutdown Hours 0.0 0.0 1508.0

14. Hours Generator on 'ine 497.8 1741.1 47312.0

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal 't.nergy Generated (MWH) 761818 2782092 73881082

17. Cross Electrical Energy Generated (MWH) 241590 903900 23662840

18. Net Electrical Energy Generated (MWH) 223194 845693 22153596

19. Unit Service Factor 69.2 60.5 84.9

20. Unit Availability Factor 69.2 60.5 84.9 21 Unit Capacity Factor (Using MDC Net) 62.1 58.7 79.5 -

22. Unit Capacity Factor (Using DER Net) 58.6 55.4 75.0

23. Unit. Forced Outage Rate 4.8 1.4 4.1

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

nefueling.. Spring 32, 5 5:cekc.

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

,