ML19289C373

Monthly Operating Rept for Dec 1978

ML19289C373
Person / Time
Site:	Point Beach
Issue date:	01/04/1979
From:	WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML19289C371	List: ML19289C370 ML19289C373
References
NUDOCS 7901120102
Download: ML19289C373 (10)

Text

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.q OPERATING DATA REPORT -

DOCKET NO. 50-266 . U' ,

DATE Januanr 4, 1979 l

C3 COMPLETED BY WISCONSIN ELECTRIC POWER CO.

w

() TELEPHONE pJ OPERATING STATUS

1. UNIT NAME: POINT BEACH NUCLEAR PLANT UNIT 1 . NOTES .

2. REPORTING PERIOD: DECEMBER 1978 . .

3. LICENSED THERMAL POWER (MWT): 151d. . .

4 NAMEPLATE RATING (GROSS MWE): 523.8 . .

5. DESIGN ELECTRICAL RATING (NE': MWE): 497. . .

6. MAXIMU:' DEPENDABLE C APACITY (GROSS MWE): 519. . .

7. MAXIuUY DEPENDABLE CAPACITY (NET MWE): 495. . . . . . . . . . . . . . . . . . . . . . . . .

8. IF CHANGES OCCUR IN CAPACITY RATINGS (ITEMS NUMBER 3 THROUGH 7) SINCE LAST REPORTe GIVE REASONS:

NOT APFLICABLE

o. POWER LFVEL TO WHICH RESTRICTEDe IF ANY (NET MWE): NOT APPLICABLE

10. REA50t!S FOR PESTRICTI0rJSe (IF ANY): NOT APPLICABLE THIS MONTH YR TO DATE CUMULATIVE

11. HOURS IN REPORTING PERIOD 744 8e760 71,472

12. NUMBER OF HOURS. REACTOR WAS CRITICAL 744 0 8,002.8 59,8S7.9

13. REACTOR RESERVE SHUTDOWN HOURS 0.0 2.6 439 6

14. HOURS GENERATOR ON LINE 744.0 7e869.2 57,937.0

15. UNIT RESERVE SHUTDOWN HOURS 0.0 2.5 383.4

16. GROSS THERMAL ENERGY GENERATED (MWH) 1,096,664 11e580,590 81,366e615

17. GROSS ELFCTRICAL ENERGY GENERATED (MWH) 376e460 3e964e040 27e427e640

18. NET ELFCTRICAL ENERGY GENERATED (MWH) 360e787 3e794,598 26,134e754

19. UtlIT SERVICE FACTOR 100.0 89.8 81.1

20. UNIT AVAILABILITY FACTOR 100.0 89.9 81.6

21. UNIT CAPACITY FACTOR (USING MDC NET) 98.0 87.5 75.3

22. UNIT CAPACITY FACTOR (USIN9 DER NET) 97.6 87 2 73.6

23. UNIT FORCED OUTAGE RATE 0.0 1.8 3.0

24. SHUTDOWNS SCHEDULED OVER NEXT 6 MONTHS (TYPEe DATEe AND DURATION OF EACH):

N0f ;E

25. IF SHUTDOWN AT END OF REPORT PERIODe ESTIMATED DATE OF STARTUP: NOT SHUTDOWN DATA REPORTED AND FACTORS CALCULATED AS REQUESTED IN NRC LETTER DATED SEPTEMBER 22, 1977

~

OPERATING DATA REPORT

• DOCKET NO. 50-301 .

DATE January 4, 1979 COMPLETED BY WISCONSIN ELECTRIC POWER CO.

TELEPHONE OPERATING STATUS

1. UNIT NAME: POINT BEACH NUCLEAR PLANT UNIT 2 NOTE 3 .

2. REPORTING PERIODt DECEMBER 1978 . .

3. LICENSED THERMAL-POWER (MWT)! 1518. . .

4. NAMEPLATE RATING (GROSS MWE): 523.8 . .

5. DESIGN ELECTRICAL RATING (NET MWE)! 497. . .

6. MAXIMUM DEPENDABLE CAPALITY (GROSS MWE): 519. . .

7. MAXIMUM DEPENDABLE CAPACITY (NET MWE): 495. . . . . . . . . . . . . . . . . . . . . . . . .

8. IF CHANGES OCCUR IN CAPACITY RATINGS (ITEMS NUMBER 3 THROUGH 7) SINCE LAST REPORTe GIVE REASONS!

NOT APPLICABLE

9. POWER LEVEL TO WHICH RESTRICTEDe IF ANY (NET MWE): NOT APPLICABLE

10. REASONS FOR RESTRICTIONSe (IF ANY)! NOT APPLICABLE THIS MONTH YR TO DATE CUMULATIVE

11. HOURS IN REPORTING PERIOD. _ .

744 8e760 56,257

12. NUMBER OF HOURS REACTOR WAS, CRITICAL 737.0 8e124.1 51,089.1

13. REACTOR RESERVE SHUTDOWN HOURS 1.8 8.4 149 6

14. HOURS GENERATOR ON LINE 719.0 8e039.9 49e994 8

15. UNIT RESERVE SHUTDOWN HOURS 1.9 1.9 87.8

16. GROSS THERMAL ENERGY GENERATED (MWH) 1e074,069 11e700,255 66,285,217

17. GROSS ELECTRICAL ENERGY GENEhMED (MWH) 367,620 4,041,400 22e475e110

18. t<ET ELECTRICAL ENERGY GENERATED (MWH) 351e604 5e858e875 21e367e677

19. UNIT SERVICE FACTOR 96.6 91.8 88.9

20. UNIT AVAILABILITY FACTOR 96.9 91.8 89.0

21. UNIT CAPACITY FACTOR (USING MDC NET) 95 5 89.0 77.6

22. UNIT CAPACITY FACTOR (USING DER NET) 95.1 88.6 76.4

23. UNIT FORCED OUTAGE RATE 0.0 0.3 17

24. SHUTDOWNS SCHEDULED OVER NEXT 6 MONTHS (TYPEe DATEe AND DURATION OF EACH)2 Refueling maintenance shutdown scheduled for March 9,1979, to last approximate.iy three and one-half weeks.

25. IF SHUTDOWN AT END OF REPORT PERIODe ESTIMATED DATE OF STARTUP! NOT SHUTDOWN CATA REPORTED AND FACTORS CALCULATED AS REQUESTED IN NRC LETTER DATED SEPTEMBER 22, 1977

DOCKET NO. 50-265 UNIT NAME Point Beach Unit 1 DATE January 4, 1979 -

COMPLETED BY Wisconsin Electric Power Co TELEPHONE AVERAGE DAILY UNIT POWER LEVEL MONTH December, 1978 AVERAGE AVERAGE AVERAGE DAILY DAILY DAILY POWER LEVEL POWER LEVEL POWER LEVEL DAY MWe NET DAY MWe NET DAY MWe NET 1 482 11 494 21 495 2 413 12 496 22 497 3 495 13 497 23 470 4 494 14 495 24 447 5 495 15 497 25 450 6 494 16 497 26 444 7 495 17 496 27 471 ,,

8 495 18 496 28 487 9 495 19 494 29 490 10 494 20 494 30 493 31 480 AD-28A (1-77)

DOCKET NO. 50-301

" NIT NAME Point Beach Unit 2 DATE January 4, 1979 COMPLETED BY Wisconsin Electric Power Co TELEPHONE AVERAGE D.'.ILY UNIT POWER LEVEL -

MONTH December, 1978 AVERAGE AVERAGE AVERAGE DAILY DAILY DAILY POWER LEVEL POWER LEVEL POWER LEVEL DAY MWe NET DAY MWe NET DAY MWe NET 1 486 11 494 21 496 2 487 12 497 ,

22 497 3 486 13 496 23 496 4 486 14 487 24 496 i 5 487 15 4^84 25 496 6 487 16 485 26 495

• / 488 17 496 27 495 8 490 18 496 ,

26 496

9 9 19 496 __

29 497 10 358 20 497 30 496 1

3, 498 AD-28A (1-77)

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50 e66

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UNIT NAMP Point Beach Unit 1 REPORT MONTH December, 1978 DATE Januarv 4, 1979 COMPLETED BY Wis . Elec. Pwr. Co TELEPHONE u

c W tn o o a

o 32 au C

o 3R

'o o es

!!'o 8n o Co No Date g gg g jyy Licensee Event vg 'g o 'g Cause and COcrective Action t-* :s :c o u .c Report No. u) Eo To Prevent Recurrence Q* M d) U3 C o 2: 3 O O

1 F: Forced Reason: 3 Method: Exhibit G-Instruc-S: Scheduled A- Equipment Failure (explain) 1- Manual tions for Prepar-B- Maintenance or Test 2- Manual Scram ation of Data Entr C- Refueling 3- Automatic Scram D- Regulatory Restriction Sheets for LER Fil 4- Other (explain) (NUREG-0161)

E- Operator Training & License Exam F- Administrative 5 AD-28B G- Operational Error (explain)

Exhibit I- Same (01-78) 11- Othar (cxplain)

Source

I Y

UNIT SHUTDOWNS AND POWER RSDUCTIONS DOCKET NO. 50-301 -

UNIT NAME Point Beach Unit 2 REPORT MONTE December, 1978 COMPLETED Y1 e c .' 'r Co.

TELEPHONE c

S W tn o 42 s 4E "c UMo Io $n No. Date S. N$ 0 EN$ Licensee Event NE $E Cause and Corrective Action h $0 $ s .$ # Report No. P IO To Prevent Recurrence a~ m ymc g 8

9 781209 S 25.0 B 1 N/A N/A N/A Unit taken off line to repair moisture separator reheater tube leaks.

p l 1 3 F: Forced Reason: Method: Exhibit G--Instruc-S: Scheduled A- Equipment Failure (explain) 1- Manual tions for Prepar-B- Maintenance or Test 2- Manual Scram ation of Data Entr C- Refueling 3- Automatic Scram Sheets for LER Fil D- Regulatory Restriction 4- Other (explain) (NUREG-0161)

E- Operator Training & License Exam F- Administrative 5 AD-28B Exhibit I- Same G- Operational Error (explain) Source (01-78) H- other ( n p l a .i r.)

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE DOCKET NO. 50-266

• UNIT NAME Point Beach Unit 1 DATE January 4, 1979 COMPLETED BY Wisconsin Electric Power Company Unit 1 was base loaded for approximately 94% of the period with a turbine runback and nine load reductions.

The turbine runback, which dropped load to 395 MWe, occurred at 0712 hours0.00824 days <br />0.198 hours <br />0.00118 weeks <br />2.70916e-4 months <br /> on December 19, 1978, and was caused by the failure of nuclear flux power range Channel N-44.

The channel was placed in the trip condition to restore the required minimum degree of redundancy. Return to full power commenced at 0722 hours0.00836 days <br />0.201 hours <br />0.00119 weeks <br />2.74721e-4 months <br /> and full power was achieved at 0738 hours0.00854 days <br />0.205 hours <br />0.00122 weeks <br />2.80809e-4 months <br />.

The runback caused a brief drop in reactor coolant system pressure to 2193 psia during the transient. According to the Technical Specifications, pressure may not drop below 2220 psia when normal operating pressure is 2250 psia. This, along with the brief period of operation with a reduced de.yree of redundancy, required a 14-day licensee event report t9 the NRC (Licensee Event Report No. 78-018/0lT-0). The cause of the channel failure was determined to be due to problems in the high voltage power supply. A spare power supply was installed and the channel was returned to service on December 22, 1978.

Load was reduced to 250 MWe for nine hours December 2, 1978, to locate and plug a small condenser tube leak in the No. 4 waterbox. During the load reduction, control rod K-7 became misaligned with its bank resulting in a quadrant flux tilt. Licensee Event Report No. 78-017/0lT-0 provided a description of the circumstances in which the problem occurred.

Power Supply requested on eight occasions that load be reduced to an average of 355 MWe for an average duration of four hours each.

A 14-day reportable event (Licensee Event Report No.

78-019/0lT-0) occurred on December 28, 1978, with the discovery of the failure of both heat tracing circuits for a section of boric acid piping between the "B" boric acid pump discharge valve and the boric acid filter. Investigation disclosed defective potentiometers in each circuit which caused voltage spikes and resulted in the circuit fuses burning out. Both potentiometers were replaced and both circuits were returned to service on December 28, 1978. Temperature

2 recordings indicate that the section of line stayed above the 1450F minimum temperature permitted by the Technical Specifications despite the loss of heat tracing.

No other major safety-related maintenance was performed during the period.

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE DOCKET NO. 50-301 UNIT NAME Point Beach Unit 2 ,

DATE . January 4, 1979 COMPLETED BY Wisconsin Electric Power Company Unit 2 was base loaded for approximately 88% of the period with one maintenance outage and three load reductions.

The outage ended a 233 day run of continuous on-line operation.

The unit was taken off line for 25 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> December 9-10, 1978, to repair moisture separator reheater (MSR) tube leaks.

Load reduction for the outage commenced at 11:34 p.m.,

December 8, 1978, and the unit was taken off line at 3:23 ,

a.m., December 9, 1978. Eight tubes were plugged in the "A" moisture separator reheater, five in the "B", nine in the "C" and nine in the "D". Condenser tube leak checks and turbine stop valve tests were conducted during the outage.

Moisture separator reheater repairs were completed at 11:00 p,m., December 9, 1978. The unit was placed on line at 4:24 a.m., December 10, 1978, and full load was achieved at 8:55 a.m., December 10, 1978.

A 14-day reportable occurrence (Licensee Event Rcport No. 78-012/0lT-0) took place during the Unit 2 moisture separator reheater outage December 9, 1978, when the react o--

coolant system "A" loop resistance temperature detector ( R'.?D )

bypass manifold was manually icolated with the reactor just critical. This violated the Technical Specifications since the requirements for the minimum number of operable channels and the minimum degree of redundancy for the overtemperature AT and overpower AT trips were not met.

Load was reduced to 490 MWe for two and one-half hours early on December 14, 1978, to check for tube leakage in the 5B feedwater heater. Leakage was detected and a maintenance request was issued.

About two and one-half hours later the 5B feedwater heater dump valve stuck open and caused a drop ir steam generator feed pump suction pressure. A manual runback to '

455 MWe for 20 minutes was required to prevent r. unit trip and permit the valve to be manually closed before full power operation could Le resumed.

Late December 14, 1978, load was :: educed to 445 MWe for three b;urs to isolate the 5B feedwater heater for repairs.

After tie heater was isolated, the unit was returned to its full capacity of 490 MWe in that condition. The unit operated at 490 MWe for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> while the leaking tubes were plugged.

2

' 'The heater was returned to service at 9:45 p.m., December 16,

, 1978, and load was returned to 495 MWe at 10:00 p.m.,

December 16, 1978.

the No major safety-related maintenance was performed during period.:

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