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Monthly Operating Repts for July 1998 for Limerick Generating Station,Units 1 & 2
	ML20237B471
Person / Time
Site:	Limerick
Issue date:	07/31/1998
From:	Grimes J, Hinchey P; PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	; NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
	NUDOCS 9808180310
	Download: ML20237B471 (7)
	v • d • e

_ _ _ _ _ _ _ _ _ _ - _ - - - _ _ _ _ _ _ _ _ - -

Limsrick Generating Station A_

m PECO NUCLEAR e=-v co-v PO Box 2300 A UMT 07 Pf CO fMRCy Sanatoga. PA 19464-0920 T.S.6.9.1.6 August 14,1998 Docket Nos. 50-352 50-353 License Nos. NPF-39 NPF-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 1 and 2 for the month of July 1998 forwarded pursuant to Technical Specification 6.9.1.6.

Very truly yours,

^ O 7f6 Joseph P. Grimes Director - Site Engineering pah

/QY.

Enclosures

/

l cc:

H. J. Miller, Administrator, Region I, USNRC A. L. Burritt, USNRC Senior Resident Inspector LGS J. D. von Suskil, Vice President, LGS G. H. Stewart, LOS Experience Assessment Branch, SSB2-4 S. A. Auve, LGS ISEG Branch, SSB4-2

-7 9908190310 980731

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Docket No. 50-352 Attachment to Monthly Operating Report for July 1998 Limerick Generating Station Unit 1 July 1 through July 31,1998 1.

Narrative Summarv of Operatina Experiences Unit i began the month of July 1998 at 100% of rated thermal power (RTP).

O.n July 31,1998 at 0205 hours0.00237 days 0.0569 hours 3.38955e-4 weeks 7.80025e-5 months , power reduction commenced for maintenance outage W32 to repair EHC tubing on #4 main turbine control valve. Power was reduced to 18% RTP at 0514 hours0.00595 days 0.143 hours 8.498677e-4 weeks 1.95577e-4 months and the main turbine was manually tripped. Power was increased to 22% RTP at 0630 hours0.00729 days 0.175 hours 0.00104 weeks 2.39715e-4 months , j

Unit 1 ended this month at 22 % RTP wi;h 1F32 in progress.

II.

Challenaes to Main Steam Safety Relief Valves There were no challenges to the Main Steam Safety Relief Valves during the month of July. There were no challenges to the Main Steam Safety Relief Valves year-to-date through July.

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i Docket No. 50-353 Attachment to Monthly Operating Report for July 1998 Limerick Generating Station Unit 2 July 1 through July 31,1998 i

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Narrative Summary of Ooeratina Experiences Unit 2 began the month of July 1998 at 100% rated thermal power (RTP).

On July 4,1998 at 2356 hours0.0273 days 0.654 hours 0.0039 weeks 8.96458e-4 months , power was reduced to 95% ' f RTP for main turbine o

valve testing. Power was restored to 100% of RTP on July 5,1998 at 0207 hours0.0024 days 0.0575 hours 3.422619e-4 weeks 7.87635e-5 months .

On July 10,1998 at 2315 hours0.0268 days 0.643 hours 0.00383 weeks 8.808575e-4 months , power reduction commenced for scram time testing and condenser waterbox cleaning (loops 2A and 2C). Power war reduced to 56% of j

RTP on July 11,1998 at 0746 hours0.00863 days 0.207 hours 0.00123 weeks 2.83853e-4 months . Power was restored to 100% of RTP on July 13, 1998 at 1238 hours0.0143 days 0.344 hours 0.00205 weeks 4.71059e-4 months .

On July 17,1998 at 2315 hours0.0268 days 0.643 hours 0.00383 weeks 8.808575e-4 months , power reduction commenced for condenser waterbox (loop 28) cleaning and inspection. Power was reduced to 56% of RTP on July 18, 1998 at 1130 hours0.0131 days 0.314 hours 0.00187 weeks 4.29965e-4 months . Power was increased to 96% RTP at 2126 hours0.0246 days 0.591 hours 0.00352 weeks 8.08943e-4 months for main turbine

' valve testing. Power was restored to 100% of RTP at 2235 hours0.0259 days 0.621 hours 0.0037 weeks 8.504175e-4 months .

On July 19,1998 at 1500 hours0.0174 days 0.417 hours 0.00248 weeks 5.7075e-4 months , power reduction commenced for control rod exercise testing. Power was reduced to 97% of RTP at 1830 hours0.0212 days 0.508 hours 0.00303 weeks 6.96315e-4 months . Power ascension was halted at 99% RTP due to margin to thermal limits issue. At 23:30, power was decreased to 80% RTP for rod pattem adjustment. Power was restored to 100% of RTP on July 20,1998 at 0504 hours0.00583 days 0.14 hours 8.333333e-4 weeks 1.91772e-4 months .

On July 20,1998 at 1500 hours0.0174 days 0.417 hours 0.00248 weeks 5.7075e-4 months , power was reduced to 99% RTP to support withdrawal of two control rods. Power was restored to 100% of RTP at 1525 hours0.0177 days 0.424 hours 0.00252 weeks 5.802625e-4 months .

On July 26,1998 at 0155 hours0.00179 days 0.0431 hours 2.562831e-4 weeks 5.89775e-5 months , power was reduced to 95% of RTP for main turbine valve testing. Power was restored to 100% of RTP at 0305 hours0.00353 days 0.0847 hours 5.042989e-4 weeks 1.160525e-4 months .

On July 31,1998 at 0018 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months , power was reduced to 99% of RTP due to main steam high radiation alarms. Power was restored to 100% of RTP at 0900 hours0.0104 days 0.25 hours 0.00149 weeks 3.4245e-4 months .

Unit 2 ended this month at 100% of RTP.

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Challenaes to Main Steam Safety Relief Va'ves l.

L There were no challenges to the Main Steam Safety Relief Valves during the month of July. There were no challenges to the Main Steam Safety Relief Valves year-to-date through July.

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ML20237B471

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