ML20079D608

Monthly Operating Repts for June 1991 for Limerick Generating Station Units 1 & 2

ML20079D608
Person / Time
Site:	Limerick
Issue date:	06/30/1991
From:	Leitch G, Meck K PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9107180297
Download: ML20079D608 (12)

Text

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=DATE,07/11/91 12:18 NRMS DOCUMENT CONTROL FORM SEQUENCE # 3913099970 LNRC MONTHLY OPERATING REPORT STATION LGS

• • • oo********************++***********************++++++************************

• MGR LIMERICK LGS /AS-1 01 I++CORRESP RELEASE PT LGS /340 01 I*

oSR. VP NUC

- CB/52C-7 01 I++ DEPT ENVIR RES - PA OUTGOING 01-I*

• VP. LIMERICK LGS-2OO 01 I**DIR. LICENSING SECT CB/52A-S 01 I*

oVP. NUC ENG/ SERVICES CB/63C-1 01 I**INPO OUTGOING 01 I*

• VP. PBAPS PB/SMO-1 01 I** LGS ENGR. TECHNICAL LGS /C4-1 01- I*

oMGR. INSURANCE DIV. MO/S15-3 01 I**HARTFIELD, R. OUTGOING 01 I*

oMGR. NUC ADMIN DIV CB-51A-13 01 I+*MGR. PUBLIC INFO MO/S13-1 01 I*

• MGR. QA PERF ASSESS CB/53A-1 01 I++ REGULATORY ENGR-LGS LGS /SB3-4 01 I*

oMGR, RATE DIV MO/S21-1 91 I++ REPORTING SUPVR.-LGS LGS /33S 01 I*

• NRC RES OFFICE . LGS /A2-5 01 I+*SHERMAN, D. OUTGOING 01 I*

oSUPT. ISEG - LGS LGS /336 01 I++MGR. FUEL MGMT CB/52A-3 01 I*

• ASST. OPER. ENGR. LGS /AS-1 01 I**YOST, F. OUTGOING 01 I*

oBHATTACHARYYA, A. LGS /335 01 I++ ______________________________________

• oBUSINESS UNIT CB/528-7 01 I** ________________________________,_____

oBUTROVICH, R. M. LGS-17 01 I+* ___________ ._________________________

• COLTER, S. OUTGOING 01 I+* ____________________________________,_

• o*oo***************++++++.+++**********++++************++++++++++**************

REQUESTS FOR CHANGES TO THIS DISTRIBUTION LIST MUST BE ADDRESSED TO THE ORGANIZATION RESPONSIBLE FOR ORIGINATING THE ATTACHED DOCUMENT (SEE NUCLEAR RELATED DOCUMENT REGISTER (NRDR) FOR RESP. ORG.). THE RESP. ORG. WILL

-AUTHORIZE THE LOCAL DAC SUPERVISOR TO MAKE THE NECESSARY CHANGES.

ATTACHED IS A COPY OF:

DOCTYPE NRC MONTHLY OPERATING REPORT DATE 07/09/91 MAKE TWO ADDITIONAL COPIES: 1 - T.T. MARTIN, 1 - NRMS i

JUL ll 00 9107180297 710630 f ?

PDR ADCCN 050003*52 //

R PDR

m 3913099970 T.S.G.9.1.6 PHILADELPHI A ELECTRIC COM PANY LIMERICK cLNER ATING STATION P. O BOX A C A N ATOG A. PENNSYLV ANI A 19464 (21 $) 3271200, EXT. 3000 GR AH AM M. LEITCH July 9, 1991 LIM E RIC E GENERAY1mt StaTnOM 50-353 License Nos. NPF-39 N^F-85 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Limerick Generating Station Monthly Operating Report For Units 1 and 2 Enclosed are the monthly operating reports for Limerick Units 2 and 2 for tha month of June,1991 forwarded pursuant to Technical Specification 6.9.1.6.

Very truly yours, (j[.v et w l I

/ .f+ ( M "

KWM/dwc Enclosure cc: T. T. Martin, Administrator, Region I, USNRC T. J. Kenny, USNPC Senior Resident Inspector I

, , n -,

.L J U, U L ~9 ,,n V

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3913099970 I

Docket No. #50-352 Attachment to Monthly Operating Report for June 1991 LIMERICK GENERATING STATION UNIT 1 JUNE 1 THROUGH JUNE 30,1991

1. NARRATIVE

SUMMARY

OF OPERATING EXPERIENCES Limerick Unit 1 began the month of June at a nominal 100% of rated thermal power. On June 1, a high drywell leakage rate caused reactor operators to decrease power to 85%,

then 45% and then 26%. The cause was identified as a problem with the '1B' Reactor Recirculation Pump mechanical seal, prompting a management decision to shut the Unit down at 0027 hours3.125e-4 days <br />0.0075 hours <br />4.464286e-5 weeks <br />1.02735e-5 months <br /> on June 2 to perform repairs. The Unit entered OPCON 4 at 1031 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.922955e-4 months <br /> on June 2 for outage activities. On June 10 at 0002 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> the Unit commenced startup, achieving initial criticality at 0314 hours0.00363 days <br />0.0872 hours <br />5.191799e-4 weeks <br />1.19477e-4 months <br />. On June 13 at 0305 hours0.00353 days <br />0.0847 hours <br />5.042989e-4 weeks <br />1.160525e-4 months <br />, the main generator was synchronized to the grid and achloved 100% power on June 17. On June 21, reactor power was reduced to 85% to allow regeneration of condensate filter demineralizers with a return to 100% nn June 22. On June 28, power was reduced to 99% due to high turbine backpressure, followed by a reduction to 80% for a Control Rod pattem adjustment. On June 29 and 30, four minor reductions to as low as 95% were taken due to high turbine backpressure. Unit 1 ended the month of June at 100% of rated thermal power.

Operational events that occurred during the month of June included:

- On June 10, while performing startup activities, reactor pressure was increased above 150 psig without demonstrating RCIC operabluty per Technical Specification LCO 3.7.3 due to a personnel error. This failure resulted in a violation of Technical Specification LCO 3.0.4 which prohibits entering a specified operating condition without conforming to the limiting conditions for operation when the associated action statement requires a shutdown. A Ucensee Event Report is being prepared for this event.

- On June 18, the DC inductor on the '1B' RPS/UPS static inverter failed. This caused the series output breakers to open. As a result, a 'B' channel half scram, various NSSSS isolations, and an SGTS initiation occurred. All systems were verified to have operated as designed. The static inverter was bypassed, power was restored, and all systems were restored to their normal alignments per procedure. A four hour notification was made pursuant to 10CFR50.72.

II Chattences to Mah Steam Safety Relief Valves There were no challenges to the Main Steam Safety Relief Valves during the month of June, oprtgex1 I

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I 3913099970 Docket No. #50 353 Attachment to Monthly Operating Report for -

June 1991 LIMERICK GENERATING STATION UNIT 2 JUNE 1 THROUGH JUNE 30,1991

1. NARRATIVE

SUMMARY

OF OPERATING EXPERIENOES Limerick Unit 2 began the rnonth of June in OPCON 4, Cold Shutdown, in day 70 of its first refueling outage with preparations for startup in progress. The Unit entered OPCON 2 on June 2 at 1035 hours0.012 days <br />0.288 hours <br />0.00171 weeks <br />3.938175e-4 months <br /> and initial c lticality was achloved at 1612 hours0.0187 days <br />0.448 hours <br />0.00267 weeks <br />6.13366e-4 months <br />. The Unit entered OPCON 1 on June 5 at 0525 hours0.00608 days <br />0.146 hours <br />8.680556e-4 weeks <br />1.997625e-4 months <br /> and the main turblno generator was synchronized to the grid at 1358 hours0.0157 days <br />0.377 hours <br />0.00225 weeks <br />5.16719e-4 months <br />. The rnain turbine generator was tripped at 1818 hours0.021 days <br />0.505 hours <br />0.00301 weeks <br />6.91749e-4 months <br />, as part of main turbine overspoed testing, and was resynchronized to the grid at 1854 hours0.0215 days <br />0.515 hours <br />0.00307 weeks <br />7.05447e-4 months <br />. Unit 2 achloved 100% power on June 10 following power ascension testing. The Unit maintained 100% for the remainder of the month with the exception of the following brief power reductions for Control Rod pattern adjustments:

June 12 80%, June 15 94%, June 20 90% On June 27, there was a briof power reduction to 92% to perform Main Turbine Control Valve testing. Unit 2 ended the month of Juno at 100%

of rated thermal power.

l II. Challences to Main Steam Safety Relief Valves There were no challenges to the Main Steam Safety Relief Valvos durir<g the month of June.

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DATE Jeis *

,t991 T*IV YONTw 'iG-TO-DATC CUWbiATIVE P4.f 57.7 74.9

19. UNIT SERVICE FACTOP ------ ----. - ----- ---- ------------

84.0 ET.7 74.9

20. UNIT AVAIta9ILITV FACTOA __ ----_---- -----_... _. ---- -------

54.6 7 4 72.4 21 UNIT CAPACITv FACTO 2 (USING vac NET) _ -_ --- --- - -- ---.--- -_ ------_'--

72.4 54.0 TT.4

22. UNIT CAPACITY FACTOE (U5!NG DEA NET) ------------ ------------ - ----------

G.0  ?.5 9.3

23. UNIT *ODCED OUTAGE DATE - --- ---.-- ----------- - ----------

24 SHUTDOWN 5 SCH;DULED OwER NExT 6 PONTHS (T*rE. DATE. AND DucATION Or EACH):

25. Ir 5suTD0wN AT END-OF CEPORT PE210D. ESTIVATED DATE Or STAcTUp:

FO ECA57 ACHIEVED

26. UNITS IN TEST STATUS temIO4 TO COvvEDCIAL OPEDATIONJ:

C9/12/09 08/12/89 INITIAL CRITICALITY .. ---- --- ---------

09/O*/89 09/07/09 INITIAL ELECTA 1CITv ---------- ---------

02/01/90 01/C9/90 C04tvERCI AL O?EEATION - ---- --- --.--.- -

i PAGE 2 OF 2

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