ML19208B001

Monthly Operating Rept for Aug 1979

ML19208B001
Person / Time
Site:	Point Beach
Issue date:	09/06/1979
From:	WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML19208A996	List: ML19208A995 ML19208B001
References
NUDOCS 7909180402
Download: ML19208B001 (11)

Text

a OPER ATIllG DAT A REPORT ,

DOCKET t10.50-20a DATE September 6, 1979 COMPLETtD BY WISC0llbIll ELL CTRIC POWt:R Co.

TELt: PHONE OPLRATIrlG STAfUS

1. UlJIT llAME: POIllT DEACH IJUCLEAR PLAtJT UllIT 1 . IlOTES .

2. REPOkTlilG PtkIODI AUGt15T 1979 . .

3. LICENSED Till:RMAL POWER (MdT): 1518. . .

84 . NAMEPLATE R ATIllG (GHOS'i MWE) : 623.8 . .

S. DESIGr1 LLECTRICAL RATIllG (tJET MWE): 497. . .

6. f4AXIMlL1 DEPtillIJAOLE CAPACITY ( G R O S'., M W E ) : 519. . .

7. MAxilluil 1)EPlllll)ADLE CAPACITY (NET tidL) : 495. . . . . . . . . . . . . . . . . . . . . . . . .

8. IF CHAllGES OCi UR IN CAPACITY RATINGS (ITEMS IJUf1 DER 3 1HROtJGil 7) SIllCE LAST RLPOIG e GIVE Hl.Aboll5 IlOT AP;'LIC ADI.E

9. POWER LEVt.L TO WilICH RESTRICTED, IF Ally (IAET MWL)* Il0T API CADLE

10. REAS0llS FOR ic ESTR IC T 10lJS e (IF Ally): 110T APPLICADI.E 00 f

y .-.,

THIS MOllTH YR TO DAfE CUMt;LATIVE N1i. Ilot JRS III REPORTItIG PERI 00 74's Se831 7 / e 30/>

7. 12. IlUMBER OF HOURS hEACTOR WAS CHITICAL 320.6 b e 24r>. 2 06,134 1 M 13. REACTOR i.LSt'HVil SHUIDOWil HOURS 0.9 3.o 4+3.2

14. HOURS GErltHAT0k oil LINE 302.o be207./ 03,141.7

16. UIJIT RESIRVi_ SHUTDOWil HOURS 1.b 4.2 d u7. e>

In. GROS:, TilEHMAL LilthGY ULttiRATED (MWH) 420e97> 7 e /10 e o19 69e07/e234

17. CROS- EttCTRICAl. ENERGY Gell! kATFD (MWH) 149e190 2e643e0.01 30ea70eo79 q 18. tlEI t.Li .C IR IC Al. Eli HGY C6:IlRATED (MWH) 140 e uti4 2eSJoe000 20 e t> 0eM4a to 19 UNIT SERVICE FAC' LOR 40./ ti9. 3 til . /

c 20. UNIT AVAll,',Dll6TY FACTOR 40.9 69.4 n2. ':

C 21. tillIT CAPACITY F ACTOR (USIf40 M11C IET) 38.0 07.b /t> . o

$ 2':. UllI T CAPaLITY FAC10R (USItJG DEk l la!.T )

c 23. LillIT FORCEI) OUTAGE HATE 37.9 54.0 87.2 6.4 74.e>

3. i

24. bHUTl)0Wils '.CilEI)ULI.1) OVEk flLXT o MollTHS (TYPEr DAlle ANI) t,URATIoll nF LACH)

'R Refueling shutdown scheduled for October 5, 1979, to last approximately five weeks.

y 26. IF SillJilloWil Al t- f lil OF RtP0HT PEi'Iulle LST I M A'i EI ) > A li oF b l Ak t lJP Shi'Ti l1D k 2e 19 ~/ >

!)A in REPolvil l) AN:) F aC I ONS C ALCllL ATEli an Hl:Gil. ",Tt t) lll l ikC 1.6 T + , k t #AYi . 6 htPl.MD H 2 'e 197/

a OPERATIrlG DATA REPORT

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DOCKET IJ0.60-301 DATE september 6, 1979 COMPLETED DY WISCONbill LLECTRIC POWER CO.

TELEPHollE OPERATING STATUS

1. UrlIT llAME: POIrlT DEACH HUCLEAR PLAllT UllIT 2 . IlOTES .

2. REPORTIflG PERIOD: AUGilST 1979 . .

3. LICErlSED THERMAL POWER (MWT): 1616. . .

4. tJAMEPLATE RATING (GROSS MWE): 623.8 . .

S. DESIGN LLFCTRICAL RATIf10 (NET MWE): 497. . .

6. MAXIfiU:1 OEPhr4DAOLE C APat. :, (Y (GROSS MWE): 519. . .

7. MAXIMU:1 OEPLNDADLE C APAC1 TY (NET MWE): 496. . . . . . . . . . . . . . . . . . . . . . . . .

8. IF CHAtlGES OCCUR Ill CAPACITY RATIllGS (ITEMS flUMOLH 3 THit00GH 7) SINCE LAST RE:PORTe GIVE Rt.Ab0f 4R:

r10T APPLICAULE

9. POWER LEVit. TO WHICH RESTRICTEOe IF AtlY (llET MWL); 110T APPLIC ADI.E

10. REASoll!, FOR rsESTHICT[ONSe (IF Ally): Il0T APPLICADIE THIS MollTH YH TO DA'IE CUMtiLATIVE 1i. HOURS Ill REPORTIllG PER100 7 48, 5e831 62 e 06 .

12. rJUMUER OF HOURS i<EACTOR WAS CitITICAL 744.0 4 e Hu ..S Uie97t.o

13. REACTOR DES!HVL SHUTDOWil HOURS 0.0 9.9 159.a

14. HOUHS GEtifRATOR Oil LIllL 744.0 4 ,8d.' . 0 54ed16.0

15. UtJIT RESI kVC SHUTDOWil HOURS 0. t1 17.4 105.2

16. GROSS THERMAL Elli.RGY GEth:RATLD (MWH) lett4e720 7,076,90. 73eable] 7

17. GROS', ELi'CTRIC AL EN; RGY GElli'R ATLlJ (MWH) 381 1.70 2 e 48 e G od 2 4 e 9 0 3 e 1 /i>

lu. I AET t Li CTRICAL Ef1: RGY CEllERATI:D ( f *,iH ) 364e04e 2e31Se02o 23ebu2e703 CO 19. (JIIIT SLRVICE F ACTOR lott. 82.7 n. . 3 C. 20. UtlIT AVallnDil. TTY FACTOR 10 a . . I 83.0 tl .S H 21. Ull1T CAPnCITY FACf0R (USIllG MDC 11ET) 98. ; > 80.2 7. 9 U 2'. Ull1T CAPnCITY FACTOR (USIrlG DER llL T ) 98.S 79. > 70.1 h, 23. UtilT FORCED OUTAGE RATE 0.0 0. ti 1.b b'

24. SHUTDOWilS SCHEDtJLt'o OVI.R IJEXT b M0ilTHS (TYPEe OAnte Anu OURATIOlJ nF EACH):

ilo.IE 2S. IF SHUTl)0Wil AT EllD OF RLP0kT Ptli100e ESTIMATEI) i# nil OF STARiUP: 110T SHU t DOWil DATA REPOHTLI) Alla FACluRS CALCUt.ATED AS RLOUi STIT) Irl s ikC I CT + ER DAllJ) St PT.:MB R 2 ? e 197:

DOCKET NO. 50-266 UNIT NAME Point Beach Unit 1 .

DATE September 6. 1979 COMPLETED BY Wisconsin El ect ri e Power Lu.

TELEPIIONE AVERAGE DAILY UNIT POWER LEVEL MONTil August. 1979 AVERAGE AVERAGE AVERAGE DAILY DAILY DAILY POWER LEVEL POWER LEVEL POWER LEVEL DAY MWe NET DAY MWe NET DAY MWe NET 1 488 11 -

2 21 489 2 488 12 -

2 22 488 3 425 13 -

2 23 488 4 - 15 14 -

3 24 488 5 -

7 15 -

2 25 488 _

6 -

6 16 -

2 26 487 7 -

4 17 -

2 27 486 8 -

2 18 - 11 28 485 CO

([

9 -

2 19 -

7 29 196 14 10 -

2 20 416 30 -

5 Te-;

31 -

3 AD-28A (1-77)

DOCKET NO. 50-301 UNIT NAME Point Beach Unit 2 .

DATE September 6, 1979 COMPLETED BY Wisconsin Electric Power Co.

TELEPHONE AVERAGE DAILY UNIT POWER LEVEL MONTli August, 1979 AVERAGE AVERAGE AVERAGE DAILY DAILY DAILY POWER LEVEL POWER LEVEL POWER LEVEL DAY MWe NET DAY MWe NET DAY MWe NET 1 492 11 491 21 489 2 493 12 479 22 489 3 494 13 __

491 23 493 4 495 14 492 24 482 5 490 15 490 25 491 6 490 16 490 26 477 7 488 17 491 27 488 8 490 18 486 28 489 9 _

491 19 484 29 490 10 490 20 491 30 490 c: 493

-j 31 AD-28A (1-77)

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-266 UNIT NAME Point nonch Unit l' REPORT MONTH Auqust, 1979 DATE soorombor 6. 1979 COMPLETED BY wik_ Ploc_ pwr_ Co.

TELEPHONE I

m u

c< m wo a o- m ocv Ev c H -H to c -H 0 C) o 0A o au o %ve am co No. Date g yg m jgg Licensee Event gg g] Cause and Corrective Action 8 ox o or Report No. m EO To Prevent Recurrence c- m emc o E 3 U o

O 4 790603 S 26.2 B 1 Docket No. 50-301 Cil PIPEX> The 3" auxiliary feedline-to-main-79-006/0lT-0 feedline branch connection was found not to comply with its design.

Branch connections were reinforced to meet code requirements.

5 790805 S 355.1 A 1 79-012/0lT-0 CB llT E X C11 A greater than 2,000 gallon per day primary-to-secondary leak was de-tected in the "A" steam generator.

Extensive eddy current inspections were performed in both steam gen-erators. Deep crevice defects were discovered. 52 tubes in the "A" and 45 tubes in the "B" steam generator were plugged.

6 790829 S 60.1 A 1 79-013/0lT-0 CB flT E X Cil A 324 gallon per day leak was de-tected in the "A" steam generator.

The leaking tube was identified O visually. Two tubes in the "A" steam generator were plugged.

1 3 F: Forced Reason: Method: Exhibit G-Instruc-S: Scheduled A- Equipment Failure (explain) 1- Manual tions for Prepar-

.U B- Maintenance or Test 2- Manual Scram ation of Data Entry C- Refueling 3- Automatic Scram Sheets for LER File 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 (explain)

UNIT SilUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-301 UNIT NAME Point Beach Unit 2' REPORT MONTl! August, 1979 b? ### "# '

COMPLETED BY Wi s . Elec. Pwr. Co.

TELEPIIONE u

c-  % tn o u o- N ocv Ev c a -a u) c au oo on as vu o co v to o co No. Date g gg g jgg Licensee Event v'g

{ y .

Cause and Corrective Action e am o or Report No. m eo To Prevent Recurrence a- n; e u) c o

E: > u f

CO C.

p.

P' C F: Forced Reason: 3 4 Method: Exhibit G-Instruc-50 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 Sheets for LER File 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) 11- Other (explain)

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE Docket No. 50-266 Unit Name Point Beach Unit 1 Date September 6, 1979 Completed By Wisconsin Electric Power Company Unit 1 was base loaded for only 38% of the period with three shutdowns. The unit was shut down from 11:05 p.m.,

August 3, 1979, to 1:18 a.m., August 5, 1979; from 3:00 a.m.,

August 5, 1979, to 10:08 p.m., August 19, 1979; and from 11:58 a.m., August 29, 1979, to the end of the reporting period. Unit 1 generated its 30 billionth kilowatt hour at 11:09 p.m., August 23, 1979.

Unit 1 was shut down at 11:05 p.m., August 3, 1979, for reinforcement of the three-inch auxiliary feedline-to-main-feedline branch connection. It had been determined that it was not constructed to design requirements and that reinforcement was necessary to bring it up to code require-ments. Details of this problem were reported in Unit 2 Licensee Event Report No. 79-006/0lT-0. During the cooldown and depressurization for this outage, a reactor trip with safety injaction occurred 56 minutes after the unit was taken off line. During depressurization, blocking of safety injection was not expedited upon receipt of the block permissive, this precipitating the above sequence.

Containment integrity was briefly violated during this outage while proceeding to a cold shutdown condition with the reactor coolant system at 393 psig and 3430F. The violation occurred as a result of an interlock failure in the containment personnel hatch operating mechanism which allowed the inside door to be opened with the outside door already open. Containment integrity wcs quickly reestablished by shutting the inside door after inrushing air had equalized the pressure across the door. This event was reported by Licensee Event Report No. 79-011/0lT-0.

Upon completion of the branch line connection reinforce-ment, the unit was brought on line at 1:18 a.m., August 5, 1979.

Indications of primary-to-secondary leakage became evident early in the startup and loading phase, the load then being stabilized at 150 MWe to permit determination of the leak rate. Analysis indicated a leak rate of 1.45 gallons per minute (2,090 gallons per day) in the "A" steam generator.

A controlled load reduction was commenced immediately and the unit was taken off-line at 3:00 a.m., August 5, 1979.

On August 6, 1979, a leaking tube was visually identified.

Eddy current testing began the following afternoon.

361270

2 In addition to two leaking tubes identified, five more defective tubes were discovered during the initial eddy current inspection. An extensive eddy current program was then commenced. The program included inspection to the first support plate of all tubes in both steam generator hot legs and approximately 200 tubes in the "A" steam generator cold leg. Because no defects were found in the "A" steam generator cold leg tubes, it was decided not to inspect any cold leg tubes in the "B" steam generator. A sufficient number of tubes in both steam generators were inspected over the "U" bend to qualify for the periodic inservice inspection of steam generator "U" tubes.

All defects discovered were located in the unrolled section of the tubes inside the tubesheet. A total of 52 tubes in the "A" steam generator and 45 tubes in the "B" steam generator were plugged. With the exception of four tube ends in the "A" steam generator hot leg which were mechanically plugged, all tubes were plugged using the explosive plugging technique. Mechanical plugging of the four tube ends will allow tube removal for defect examination at a future date, if desired. Additional details are reported in Licensee Event Report No. 79-012/0lT-0.

At 10:08 p.m., August 19, 1979, upon return to service, there were again indications cf a primary-to-secondary leak in the "A" steam generator. The initial leak rate was about 150 gallons per day. The leak rate increased slowly initially, then increased at about 30 gallons per day until it reached 324 gallons per day at midnight, August 28, 1979. The decision to shut down and repair the leak was made the morning of August 29, 1979. The unit was taken off line at 11:58 a.m.

Visual inspectica revealed one leaking tube in the "A" steam generator. A preliminary reevaluation of the eddy current recording tape from the previous outage (August 5-19, 1979) revealed indications of a 88% defect located one to two inches below the top of the tubesheet. This defect was difficult to evaluate because of " noise" in the signal.

The leaking tube and a. tube that was confirmed as degraded to 31% from data taken during the previous eddy current inspection were mechanically plugged. The unit was returned to the line on September 2, 1979. This outage is further described in Licensee Event Report No. 79-013/0lT-0.

A modification to the safeguards circuitry has been completed. This modification is discussed in this i.nnth's Unit 2 operating experience and i: Licensee Event Report No. 79-010/01T-0.

Work is continuing on IE Bulletins 79-02, anchor bolt inspection, and 79-14, seismic analysis for as-built safety related piping systems.

OU15U1

3 One instrument channel power supply was repaired following a diode failure. Power Supply redundancy was available throughout this repair. A Diesel generator out-put breaker was temporarily out-of-service while a failed cutout switch was being replaced. The other Diesel generator was available during the repair.

The large number of days lost this operating period due to outages has caused the date of refueling to be delayed one week. The refueling outage is now scheduled to begin October 5, 1979.

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

so* ka l, k i n.

ru. .,

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE Docket No. 50-301 Unit Name Point Beach Unit 2 Date September 6, 1979 Completed By Wisconsin Electric Power Company Unit 2 was base loaded for approximately 98% of the period with five load reductions. Power Supply requested on three occasions that load be reduced to an average of 430 MWe for an average duration of two and three-quarter hours. Lead was reduced on two occasions to an average of 345 MWe for an average duration of one and three-quarter hours for turbine stop valve testing.

A modification to the safeguards circuitry has been completed. This modification corrects a circuit chcracteristic that could possibly prevent automatic reactivation of certain safeguards functions if the manual reset buttons failed to return to their normal "off" position after being depressed, a highly unlikely event. Alarm indication that " reset" is operative is included in this modification. Systems involved are: safety injection, containment isolation, containment ventilation isolation and containment spray. Additional details are included in Unit 1 Licensee Event Report No.

79-010/01T-0.

On August 10, 1979, a rod control " urgent failure" alarm was received. The alarm lasted for an hour and 42 minutes, at which time it was reset. The cause far the alarm has not been determined.

A small fire was discovered in the Unit 2 facade on August 30, 1979. Sparks from welding on the top of contain-ment ignited plastic wrappings on old spent fuel pit under-water lights located some 140 feet below. The fire was quickly extinguished by onsite personnel and was confined to a small isolated area which contained no other combus-tibles. No safety related equipment was affected or endangered.

A source range instrument preamplifier was replaced this period following its failure.

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

Su12?3

SUPPLEMEtiT TO M0tlTHLY REPORT FOR August 1979

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REFUELIttG If1FORMATI0:1 REQUEST In accordance with our letter dated February 21, 1978, which provided certain refueling infonnation, we are providing the following update to that refueling information: (flC=NoChange) a) flext Scheduled Refueling Shutdown: Unit 1: 10/5/-74 Unit 2: 3/14/80 b) Scheduled Date for Restart: Unit 1: 11/2/79 Unit 2: 4/18/80 c) License Amendment Required / Staff 10 CFR 50.59 Review Completed: Unit 1: flone Anticipated Unit 2:

d) Scheduled Date for Submitting Supporting Information: Unit 1: August 1979 Unit 2: January 1980 e) Important Licensing Considerations: Unit 1: None Unit 2: flone f) Number of Fuel Asserrblies in Storage Pool: 212 g) Other:

Authorized Storage Capacity Increased to 1502 per License amendments

) 35 for Unit 1 and 41 for Unit 2 dated April 4,1979.

I hu1AU4

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