ML20064G563

Monthly Oper Rept for Nov 1978

ML20064G563
Person / Time
Site:	Point Beach
Issue date:	12/05/1978
From:	WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML20064G560	List: ML20064G558 ML20064G563
References
NUDOCS 7812120087
Download: ML20064G563 (9)

Text

.- .-

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE DOCKET NO. 50-266 UNIT NAME Point Beach Unit 1 DATE December 5, 1978 COMPLETED BY Wisconsin Electric Power Company Unit 1 was base loaded for approximately 93% of the period. Load reductions were attributabL' to one turbine run-back and eleven load reductions because of system requirements, physics tests, or minor maintenance.

The runback occurred at 4:43 p.m., November 6, when the tie breaker between the 1A03 and 1A05 4160 V engineered safeguards buses tripped. This resulted in a turbine runback

' due to loss of power to the control rod position indication (RPI) cabinets. The runback was stopped at 440 MWe when the emergency diesel generator automatically phased onto the 1A05 bus following the bus undervoltage condition and power was restored to the RPI cabinets.

When the tie breaker tripped, one pressurizer heater back-up group was lost. This, along with the control rods automatically stepping in and reducing reactor power during the turbine run-back, resulted in reactor coolant system pressure briefly dropping to 2193 psia. The Technical Specifications state that pressure may not drop below 2220 psia when normal operating pressure is 2250 psia. This event was reported in Licensee Event Report No. 78-016/01T-0.

Careful examination of the tie breaker, its under-voltage relay, affected bus, and other protection relays disclosed no abnormalities. The breaker was closed, and normal full-power operation was resumed at 5:15 p.m., November 6.

Load was reduced to about 475 MWe for about six hours on November 1 to repair a steam leak on the "D" moisture separator reheater manway diaphragm. Load was reduced to 445 MWe for thirteen hours on November 4 to conduct a power coefficient test to conclude post-refueling physics testing.

Load was reduced to 290 MWe for eight hours on November 19 in order to conduct condenser tube leak checks. Lead was reduced by about 3 MWe on November 24-29 to provide additional operating margin from core thermal power limitations while the unit's monitoring computer was out of service.

On seven occasions, load was reduced to an average of 445 MWe for an average duration of three and one-half hours each.

7812120097' l

', *'. 2 The unit generated its 27 billionth kilowatt-hour of electricity on November 26, 1978.

l Priinary-to-secondary leakage in the "A" steam generator gradually decreased to 28 gallons per day on November 16, 1978.

The leakage then stabilized and remained at about 28 gallons  !

per day to the end of the period.

The reactor coolant system chloride concentration exceeded normally acceptable levels for two brief periods during the month after a common solvent which contained chlorides was used to clean the internals of a charging pump.

Work on a steam generator blowdown modification has begun with completion scheduled for March 1, 1979. The purposes of the modification are to minimize plant discharges, conserve condensate and recover waste heat.

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

I NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE DOCKET NO. 50-301 UNIT NAME Point Beach Unit 2 DATE December 5, 1978 COMPLETED BY Wisconsin Electric Power Company Unit 2 was based loaded for approximately 97% of the period, with six load reductions. On five occasions load was reduced to an average of 460 MWe for an average duration of three and one-half hours each. Load was reduced to 345 MWe for two hours on November 13 to conduct turbine stop valve tests.

Unit capacity was reduced by about 6 MWe throughout

,~ the period as a result of moisture separator reheater tube i, leakage. The "B" and "C" moisture separator reheaters were taken out of service on November 17 when tube leakage became excessive.

The unit generated its 22 billionth kilowatthour of electricity on November 22.

At the end of the period, Unit 2 had been on line continuously for 225 days, setting a new Point Beach record for continuous on-line operation. The previous record was 197 days.

Work on a steam generator blowdown modification has begun with completion scheduled for March 1,1979. The purposes of the modification are to minimize plant discharge, conserve condensate, and recover waste heat.

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

l

OPEHATING DATA HFPORT DOCKET tJo. 60-26ti ~

DATE December 5, 1978 COMPLETFD BY WISC0tiSIll ELICTRIC POWER CO.

TEll:PH0tlE OPFH ATIllG S TA'l VG

1. Ull!T fIAMEI POIrlT BEACH llUCLEAR PLAtlT UllIT 1 . Il0TES .

2. HEPOHTIllG PEltIOD: ilOVEMBER 1978 . .

3. LICFilSFD THl:RMAL POWER (MWT)I 1518. . .

4. IIAf1EPLAIF HATIllG (GROSS MWE) 523.8 . .

S. DFSibli FLI CTHICAL HATIllG (flET MWF)! 497. . .

6. MAXIMull DEPl.flDAHLE CAPACITY (GHOSS MWE)2 S19. . .

7. MAXIllU:8 DEPl NOABLE C APACITY (IJET MWE)! 495. . . . . . . . . . . . . . . . . . . . . . . . .

8. IF CHANGES OCCUH Ill CAPACITY HAlIllGS (ITEMS NUMBER 3 THROUGH 7) SIrlCE LAST REPORTe GIVE HEASollbt il0T API'LICABLE 4 POWEH LEVtL TO WHICil RESTRIClEDe IF ANY (IlET MWE) Il0T APPLICARLE

10. ItE Abor rs Folt IESTitICTIollSe (IF AtlY)t Il0T API'LICABLE THIS MONTH YR TO DATE CUMULATIVE 11 HOURS Iti kEPOHTIllG PEltIOD 720 8e016 70e728

12. NUMllER OF HOURS 1(EACTOR WAS CRITICAL 720.0 7e258.0 59e143.9

13. HF AC10lt let St.itVE SHUTDOWN HOURS 0.0 2.6 439.6

14. It00HS GErli HATOH Oil LIllE 720.11 7e125.P 57e193.0 lb. Utill HE61 HVI' LHUIDOWil HOURS 0.0 2.5 383.4

16. GROS, IHFHMAL Fill'HGY GElli HATI'D (MWH) le072eS16 10,491e926 80e269e961

17. GH0$1. ELi C1itIC AL I:til ItGY GElli HATi D (MWH) 367e980 3eS92eb80 27eOb1e160 l ll . IIE T l Li CTHICAL Ell! HGY GElit HATI D (MWH) 351e946 3e43er811 2be773e967

19. UrlI I SERVICI FACTOH 1 011. 0 80.9 80.9

20. UlliT AVA!LARIL1TY FACTOR 100.0 80.9 81.4

21. Url! T CAPACITY FACT 0H (USIrlG MDC IlET) 9 8 . 11 06.5 75.1 2:. Ull!I CAPACITY FAC10H (USIllG DER hl T) 98.4 86.2 73.3

23. UilIT FOHCED OUTAGE HATii 0.0 2.0 3.0

24. SHUIDOWIIS *.,CllEDULtD OVFR flFXT 6 M0liiHS (lYPEe DATEe AND 11URAT1011 0F EACH):

ilOilF

25. IF SHUTDOWil Al FUD OF REPORT l'i'HIoue I.STIMAIED DATE OF STAHlUPI IlOT SHUlDOWil DATA HFPOU ft D Alll> FAC~lOltS C ALCUL.ATFD AS Hl:OUt STED Ill I;RC LEl il H DATFD St PTI'MHi H 2.*e 1977 1

OPEHAIIllG DATA REP 0HI DOCKET t10. 50-301 .

DATE December s, 1978 COMPLETFD HY WISCONSIll ELL CTRIC POWEH CO.

TEll-PH0fIE OPfHAllflG SIAlUS

1. UllI T llAf4 E : POIlli BEACH tlVCLEAH PL Allr UllIT 2 . Il0TES .

2. REP 0H IIllG PFitIOD: IlOVEMBt-R 1978 .

3. LICFilSt.D THFHMAL POWER (MWT)I 1518. .

4. IIAMEPLATF RAllllG (GROSS MWE)I S23.8 .

b. DESIGil I-Li C TRICAL lt ATIllG (IlET MWE): 497. .

6. MAXIf10M DEPI'llDABLE CAPACITY (GROSS I4WE) I bl9. .

7. MAXIMtill DEPl'ilDAHLE CAPACITY (flET MWE): 495. . . . . . . . . . . . . . . . . . . . . , . . .

8.

IF CHAllGi-S OCCUH Ill CAPACITY RATIllGS (ITFMS tlUMBER 3 THROUGH 7) SINCE LAST REPokTe GIVE HiAS0tJGI Il0T APILICABLE

9. POWFH LEvlL 10 WHICH RESTRICTED, IF AtlY (llET MWE)i fl0T APPLICABLE 10 HEASoll'., FOR HFSTRICTIOf15e (IF Ally): IlOT APPLICABLE THIS M0f1TH YR TO DATE CUMULATIVE 1I. HOUHS Ill itFPORTIllG PERIOD 720 8e016 SS e ?,13

12. I AUMHER OF HOURS HEACTOH WAS CitITIC AL 720.0 7e387.1 50e3S2.1 1.5 . RFACTOH I l: SI kVF SHUTDOWil HOURS 0.0 6.6 147.8

14. HOURS GFill HATOH Ori LIllF 720.0 7e320.9 49e276.8 lb. UrlI l HESI HVI: SHUTDOWil HOURS 0.0 0.0 85.9

16. GHOS', iHERMAL l'ill.HGY GElli:RATl D (MWH) 1e079e867 10e626e186 66e21ie148

17. GHOS' FLt CTHIrAL Erli~HGY GFill'HATI D (MWH) 370eS70 3e673e780 P:'e107e490

18. FIFT FLI C'lHICAL Lill HGY GEllFHATED (MWH) 353,997 3ebO7e271 21e016e073

19. UtlT T SEHVICL FAC10H 10 0. il 91.3 80.o

20. IltlIT AVAILABILITY FACTOR 100.0 91.3 80.9

21. tillIT CAPACITY FAC10R (USIllG MDC llFT) 9-) . 3 80.4 77.4 21' . UllI T CAPACITY FACIOR ( U S IllG D E H lit: T ) 98.9 80.0 76 2

23. UllIT FnHCED OUTAGl. RATE 0.0 0.4 1.7

24. SHUIDOWil5 LCitEDULLD OVER flEXT o M0ilTHS ( fYPEe DATEe AllD DURATIOli 0F EACH)2 Maintenance shutdown scheduled for December 9, 1978, to last approximately 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in order to plug leaking moisture separator reheater tubes.

Refueling maintenance shutdown scheduled for 3-9-79 to last approximately four weeks.

26. IF SHUTDOWil A) EllD OF REPOHT PEl.*IODr ESTIMATED t) ale OF STARI'UPI fl0T SHUTDOWil DATf. REP 0H il D Ailli FAC 1'0HS C ALCill. A~lFD AS HFGui STI'D Irl l'HC LFT !! H DATI-D Si PTi MH1'H 2:*e 1977

~

DOCKET NO. 50-266 UNIT NAME Point Beach IIni t 1 DATE December 5, 1978 COMPLETED BY Wisconsin Electric Pwr. Co.

TELEPHONE I

AVERAGE DAILY UNIT POWER LEVEL

l MONTH November, 1978 i

AVERAGE AVERAGE AVERAGE DAILY DAILY DAILY

]'

POWER LEVEL POWER LEVEL POWER LEVEL DAY MWe NET DAY MWe NET DAY MWe NET 1 491 11 494 21 495 2 494 12 486 22 494 3 495 13 495 23 496 4 471 14 492 24 490 5 476 15 495 25 482 s

6 493 16 496 26 488 7 495 17 497 27 490 8 495 18 P

493 28 490 9 495 19 423 29 489 -

10 494 20 489 30 493 31 --- -

AD-28A (1-77)

DOLodT NOo 50-301 -

UNIT NAME Point Beach Unit 2 DATE December 5, 1978 COMPLETED BY Wisconsin Electric Pwr. Co.

TELEPHONE AVERAGE DAILY UNIT POWER LEVEL MONTH November, 1978 AVERAGE AVERAGE AVERAGE 1 DAILY DAILY DAILY POWER LEVEL POWER LEVEL POWER LEVEL DAY MWe NET DAY MWe NET DAY MWe NET 1 496 11 494 21 490 2 497 12 484 22 490 3 497 13 485 23 488 i 4 496 14 494 24 487 5 498 15 495 25 488 6 493 16 494 26 487 7 496 17 495 27 487 8 493 18 491 28 488 9 496 19 492 29 486 10 495 20 490 30 487 31 ---

AD-28A (1-77)

aJ .

UNIT SilUTDOWNS AND POWER REDUCTIOllS DOCKET HO. 50-266 UNIT NAME Point Beach Unit 1 REPORT MONTil November, 1978 COMPLETED Y if ec P r Co.

TELEPilONE

{ m l ci 4-4 tD o 4

. ,-4 - S c - O W GBA as ou o mee em ae No. Da t.e g gg g jjg Licensee Event gg gy Cause and Corrective Action b :s :: e v .c Report No. u2 Eo To Prevent Recurrence Q~ "

$"$ 0 8

i 1

I F: Forced Reason:

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

E- Operator Training & License Exam F- Administrative 5 AD-2BB Exhibit I- Same (01-78) G- Operational Error (explain) Source 11- Other (explain)

-- - - - - _ _ - 2

E e

i ,'.

UNIT S!!UTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-301 ,

UNIT NAME Point Beach Un.it 2 REPORT MONTil November, 1978 COMPLETED ec P r Co.

TELEPHONE en

a. ~ wn v c)

M eu "co Jit cu p ra ha an ae No. Date g gg g jgg Licensee Event vg 'g gy Cause and Corrective Action E, om o ux Report No. m EU To Prevent Recurrence A- M gmp g 8

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 Entry C- Refueling D- Regulatory Restriction 3- Automatic Scram Sheets for LER File 4- Other (explain) (NUREG-0161)

E- Operator Training & License Exam AD-28B P- Administrative 5 G- Operational Error (explain) Exhibit I- Same (01-78) Source 11- Other (explain)

- - _ _ _ _ -