ML19338C264

Monthly Operating Repts for Jul 1980

ML19338C264
Person / Time
Site:	Prairie Island
Issue date:	08/01/1980
From:	Hunstad A NORTHERN STATES POWER CO.
To:
Shared Package
ML19338C263	List: ML19338C262 ML19338C264
References
NUDOCS 8008140308
Download: ML19338C264 (8)

Text

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h, NARRATIVE SUdMARY OF OPERATING EXPERIENCE DOCKET No. 50- 282 UNIT Prairie Island No.1 DATE 800801 COMPLETED BY A A Hunstad TELEPHONE 612-388-4767 MONTH JULY 1980 o On June 29th a small primary-to-secondary leak was indicated by trace readings f of xenon gas in the air ejector discharge and by tritium and other radioisotopes in secondary side water samples in No. 12 Steam Generator. The leakage was

^

2 m

determined to be about 0.004 gpm. Leakage increased steadily until on July 1st

a. it was calculated to be 0.3 gpm and the unit was then shut down at 1530. The 52 g leaking tube was identified and plugged. The defect was in the tube sheet area.

Routine eddy current examination of both steam generators was done; no other defects were seen. .

O The unit was returned to service at 0436 on 7-21 and is in coastdown operation now. Refueling is scheduled for September 2nd.

e l

8 0 08140 M i c

DAILY UNIT POWER OUTPUT I

DOCKET NO. 50- 282 UNIT Prairie Island No. 1

, DATE 800801 COMPLETED BY A A Hunstad TELEPHONE 612-388-4767 i

MONTH JULY 1980

, DE AVERACE LOAD MWe-Net DAY AVERAGE LOAD MWe-Net

{ 1 ,

246 17 -3 j 2 -14 18 -4 i

-4

~

3 19 -9 i

4 -4 20 -17 5 -4 21 105 6 -4 22 360 7 -4 23 444 8 -4 24 435 i~

9 -4 25 453 10 -4 26 449 11 -4 27 444 12 -4 28 432 -

13 -4 29 428 14 -4 . 30 422 j 15 -5 31 412.

16- -10 Average loads above 503 !Ne-Net are due to cooler condenser circulating water.

e

= n:.7::: . c 7 H ?' G XCC NO 50- 282 DATE 800801 COMPLETED 3Y A A Hunstad OPERATING STATUS TELEPHONE 612-388-4767

1. Unic Name: Prairie Island No. 1

2. Reporting Period: JULY 1980 N tes

3. Licensed Ther=al Power (Wt): 1650 _

4 Nameplate Rating (Gross We): 593

5. Design Electrical Rating (Net We): 530

6. Max N Dependable Capacity (Gross We): 534

% 7. Maxi =um Dependable Capacity (Net We): 503 g B.  !! Changes occur in Capacity Ratings (Ice =s Nu=ber 3 Through 7) Since Last Report:

a x Give Reason:

C

[ 9. Power Level To W'tich Restricted, If Any (Net We):

e i 10. Reasons for Restrictions, If Any:

This Menth Yr-To-Date Cu=ulative

11. Hours In Reporting Period 744 5111 53079

12. Number Of Hours Reactor Was Critical 279,.6 4515.5 45723.9

13. Reactor Reserve Shutdevn Hours 0.0 0.0 5531.9 14 Hours Generator on Line 274.9 4505.7 44629.2

15. 'J .it Reserte Shutdc.n Hours 0.0 0.0 0.0

16. Gross Thermal Energy Gen'erated (.'a'd) 401787 7236729 69315723

17. Gross Electrical Energy Generated (%'d) 119800 2234180 22387850

13. Net Electrical Ecer;;y Generated (5"d) 10839S 2090265 20929517

19. Unit Service Factor 36.9 38.2 76.8

20. Unit Availability Fsetor 36.9 88.2 76.8

21. Unit Capacity Factor (Using MDC Net) 29.0 31.3 71.6

22. Unit Capacity Factor (Using DER Net) 27.5 77.2 68.0

23. Unit Forced Outage Rate 39.0 3.8 12.3 24 fhutdevis Scheduled Over Next 12 Months (Type, Date and Duration of Each):

Refueling, September 2, 1980, 3 weeks

25. If Shut Down at End of Report Period, Esti=ated Date of Startup:

UNIT SIIUTDOWNS AND POWER REDt!CTIONS '

DOCKET NO. 50- 282 REPORT MONTil JULY 1980 UNIT NAME Prairie Island No. I DATE 800801 COMPLETED BY A A flunstad TELEP110NE 612-388-4767

.-4 a n u u% Licensee go a Cause & Corrective Date $. 07 E d8 Event u $ E .n Action to N N$ $ 2"$ Report # $0 $$ Prevent Recurrence YS $ SEN em

$0 ci v o E g o a

8 a:

b N 800701 F 176.0 B 2 P-RO-80-18 CB llTEXCil Shutdown due to increasing primary-

, to-secondary leakage. One tube in g No. 12 Steam Generator was plugged, N

800708 S 293.1 B 2 N/A N/A N/A Routine eddy current examination of steam generators was done.

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 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 (NUREC-0161)

C-Operational Error (Explain) li-Other (Explain Exhibit 1 - Same Source

e NARRATIVE SU$fARY- 0F OPERATING EXPERIENCE DOCKET No. 50- 306 UNIT Prairie Island No. 2 DATE 800801 COMPLETED BY A A Hunstad TELEPHONE 612-388-4767 MONTH JULY 1980 o

g The unit was base loaded this month. On 7-15 a severe electrical storm caused

$ operation of several breakers in the substation, one of which separated the main generator from the grid. The unit tripped at 2030 and was returned to service at h

g 0753 the next day.

5 a.

e

• DAILY UNIT POWER OLT'PUT DOCKET No. 50- 306 UNIT Prairie Island No. 2 DATE 800801 COMPLETED BY A A Hunstad TELEPHONE 612-388-4767 MONTH . JULY 1980 DAY AVERAGE LOAD MWo-Net DAY AVERAGE LOAD SMe-Net 1 497 17 ,

499

- 2 510 18 502

~

3 510 19 503 ,

'i f 4 489 20 498 5 496 21 497 6 495 22 495 1

7 495 23 492 8 '500 24 491 9 502 25- 494 10 496 26 493 11 481 27 492 12 499 28 491 13 470 29 494 14 497 30 493 15 424 31 492 16 291 Average loads above 500 IEe-Net are due to cooler condenser circulating water.

. . .- ,: r-1..;xET ho 30- 306 DATE 800801 COMPLETED BY A A Hunstad OPERATING STATUS TELEPHONE 612 388-4767

1. Unit Name: Prairie Island No. 2

2. Reporting Period: July 1980 Notes

3. Licensed Thermal Power (MWt): 1650

4. Nameplate Rating (Gross MWe): 593

5. Design Electrical Rating (Net lNe): 530

6. Maximum Dependable Capacity (Gross MWe): 531 , _ , ,

C 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:

3

~ '

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

j 10. Reasons for Restrictions, If Any:

This Month Yr-To-Date Cumulative

11. Hours In Reporting Period 744 5111 49197

12. Number Of Hours Reactor Was Critical 737.5 3802.3 42931.1

13. Reactor Reserve Shutdown Hours 6.5 89.4 1495.4 j 14. Hours Generator Cn Line 732.6 3730.5 42131.5

15. Unit Reserve Shu : awn !?.,ura 0.0 0.0 0.0

16. Gross Therral Energy Generated (ttWH) 1196818 5878750 65551253

17. Gross Electrical Energy Generated (MWH) 385670 1893930 20948060

13. Net Electrical Eaeegy Generated (MWH) 361823 1768568 19607200

19. Unit Service Fac'tcr 98.'5 73.0 85.6

20. Unit Availability Factor 98.5 73.0 85.6

21. Unit Capacity Factor (Using MDC Net) 97.3 69.2 79.7

22. . Unit Capacity Factor (Using DER Net) 91.8 65.3 75.2

23. Unit Forced Outage Rate L.5 0.6 4.5 24 Shutdowns Scheduled over Next 12 Months (Type,.Date and Duration of Each):

Refueling, January 1981, 6 weeks

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

UNIT S!!UTDOWNS AND POWER REDUCTIONS DOCKET NO. 50 306 REPORT MONTil UNIT NAME Prairie Island No. Z JUI.Y 1980 DATE 800801 .

COMPLFTED BY A A Ilunstad _

TELEPlIONE 612-388-4767

-4 c n  % ec1 Licensee g3 a a Cause & Corrective Date $. 47 $ 33 Event 3$ Eo Action to N N$ $ 2UN Report # $0

$ -8 Prevent Recurrence Y$

33 *

$ SEN WM

$0 O

4 0

S '

st

, 800715 F 11.4 11 3 P-RO-80-20 EA ZZZZZZ Severe electrical storm caused lose 2

-1 of two sources of offsite power ant

- unit trip.

5 m .

F: Forced Reason Method: Exhibit G-In-S: Scheduled A-Equipment Failure (Explain) 1-Manual structions for B-Maintenance 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 & Licensa Examination Report (LER) File F-Administrative (NUREG-0161)

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

.. _ _._