ML20030B439

Monthly Operating Repts for Jul 1981

ML20030B439
Person / Time
Site:	Prairie Island
Issue date:	08/03/1981
From:	Hunstad A NORTHERN STATES POWER CO.
To:
Shared Package
ML20030B437	List: ML20030B436 ML20030B439
References
NUDOCS 8108180104
Download: ML20030B439 (8)

Text

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SUMMARY

OF OPERATING EXPERIENCE DOCIGT NO. 50-282 UNIT Prairie Island No. 1 DATE 8108n1 COMPLETED BY A.A.

Mimernd TELEPHONE 612-388-1121 MONTH July, 1981 s

g The Unit was base loaded this inonth; no shutdowns.

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DAYLY UNIT POWER OUTPUT DOCKET NO. 50- 282 UNIT-Prairie Island No.1 DATE 310803 COMPLETED BY A.A. Hunstad TELEPHONE 612-388-1121 MONTH July, 1981 i

DAY AVERAGE LOAD MWe-Net DAY AVERAGE LOAD MWe-Net 8

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495 17 487 m

2 490 18 488 j

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3 488 19 485 E

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4 448 20 488 5

487 21 494-6 488 22 498

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7 488 23 489 8

488 24 488 9

493 25 488 10 490 26 494 ____

11-486 27 494 12 488 28 495 13 489 29 493 14 490 30 496 15 493 31 497 I;

16 491 Average loads above 503 MWe-Net are due to cooler condenser circulating water.

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OPERATING DATA REPORT DOCKET NO 50- 282 DATE 810803 COMPLETED BY A.A. Hunstad OPERATING STATUS TELEPHONE 612-388-1121 1.

Unit Name:

Prairie Island No. 1 2.

Reporting Period:

July. 1981 es 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 (het MWe):

503 g

8.

If Changes occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report:

Give Reason:

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

10.

Reasons for Restrictions, If Any:

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This Month Yr-To-Date Cumulative

11.. Hours _In. Reporting Period 744 5087 66839 12.

Number Of Hours Reactor Was Critical 744.0 5087.0 53254.1 13.

Reactor Reserve Shutdown Hours 0.0 0.0 5538.1 14.

Hours Generator on Line 744.0 5087.0 52077.6 15.

Unit Reserve Shutdown Hours 0.0 0.0 0.0 16.

Gross Thermal Energy Generated (MWH) 1216248 8281482 81002163 17.

Gross Electrical Energy Generated (MWH) 391870 2720080 26201590 18.

Net Electrical Energy Generated (MWH) 364044 2551255 24496862 19.

Unit Service Factor 100.0 100.0 77.9 20.

Unit Availability Factor 100.0 100.0 77.9 21.

Unit Capacity Factor (Using MDC Net) 97.3 99.7 72.9 22.

Unit Capacity Factor (Using DER Net) 92.3 94.6 69.2 23.

Unit Forced Outage Rate 0.0 0.0 11.2 24.

Shutdowns Scheduled Over Next 12 Months (Type, Date and Duration ci Each):

Refueling, September 12, 1981, 6 weeks 25.

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

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SUMMARY

OF OPERATING EXPERIENCE DOCKET NO. 50-306 UNIT Prairie Island No. 2-DATE 810803 COMPLETED BY A.A. Hunstad TELEPHONE 612-388-1121 MONTH July. 1981 Investigation of increased vibration on No. 21 Reactor Coolant Pump j

continued. On July 6th a circumferential crack through about 3/4 of the I

pump shaft was discovered. The shaft was shipped offsite for detailed examination. A replacement rotating assembly was installed. The unit G

was returned to service at 0144 on July 24th. At 1025 on July 24th the unit tripped on low steam generatorieve' du; to misoparation o" automatic valves in the condensate polishing system. The unit was back in service

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at 1833 the same day and is now operating at 100% power.

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DAILY UNIT POWER OUTPUT DOCKET N0. 50 306 UNIT Prairie Island No. 2 DATE 81 oRO't COMPLETED BY A.A. Hunstad TELEPHONE 612-388-1121 MONTH _

July, 1981 DAY AVERAGE LOAD MWe-Net DAY AVERAGE LOAD MWe-Net s

1

-3 17 g a:

2

-3 18

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-3 19

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-3 20

-4 5

-3 21

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-12 7

-3 23

-15 8

-3 24 38 9

-3 25 249 10

-3 26 383 11

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-3 28 494 13

-3 29 493 14

-3 30 495 i

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-3 31 493 16

-3 Average loads above 500 MWe-Net are due to cooler condenser circulating water.

t OPERATING DA1.s REPORT DOCKET NO 50- 306 DATE 810803 COMPLETED BY A.A. Hunstad OPERATING STATUS TELEPHONE 612-388-1121 1.

Unit Name:

Prairie Island No. 2 Notes 2.

Reporting Period:

Ju".y, 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):

531 d

g 7.

Maximum Dependable Capacity (Net MWe):

500 g

8.

If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report:

3 Give Reason:

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

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Reasons for Restrictions, If Any:

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I This Month Yr-To-Date Cunulacive 11.

Hours In Reporting Period 744 PJ87

___57957 12.

Number Of Hours Reactor Was Critical 190.3 2967.7 49349.5 13.

Reactor Reserve Shutdown Hou'rs 8.1 8.1 1516.1 14.

Hours Generator On Line 182.1 2922.3 48493.2 c

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Unit Reserve Shutdown Hours 0.0 0.0 0.0 l

16.

Gross Thermal Energy Generated (MWH) 255433 4664229 75763219 17.

Gross Electrical Energy Generated (MWH) 80560 1507890 ___

24266830 18.

Net Electrical Energy Generated (MWH) 72577 1407562 22715465 g

19.

Unit Service Factor 24.5 57.4 83.7 20.

Unit Availability Factor 24.5 57.4 83.7 21.

Unit Capacity Factor (Using MDC Net) 19.5 55.3 78.4 22.

Unit Capacity Factor (Using DER Net) 18.4 52.2 74.0 23.

Unit Forced Outage Rate 75.5 26.5 6.0 24.

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

Refueling. Sorine 1982. 6 weaka 25.

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

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o UNIT SlIUTDOWNS AND POWER REDilCTIONS DOCKET NO.

50 306 REPORT MONTil UNIT NAME Prairie Island No. 2 DATE __ 313333 COMPLETED BY A.A. Ilunstad TEI.EPil0NE M 2-188-1121

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Cause & Corrective s

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Date 37 8

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, 810611 F

553.8 A

1 P-RO-81-8 CB PUMPXX Failure of No. 21 RCP Sha^

rt.g Replacement rotating assembl, g

was installed.

810724 F

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3 NA NA NA Trip when automatic valves in the condensate polishing system malfunctioned.

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Forest

• Reason Method:

Exhibit G-In-S: Sche.la t ed A-Erlu i pmen t Fatlure(Explain) 1-Manual structions for IHlaintenance or Test 2-Manual Trip Preparation of C-Ref uc-l i ng 3-Automatic Trip Data Entry Sheets D-Regulatory Rearriction 4-Other (Explain) for Licensee Event E-Operator Training & License Examination Report (LER) File F-Administrative (NUREG-0161)

G-Operational l{ c ro r (F.xpla i n) r ll-other (Explata Exhibit 1 - Same Source o

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