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Monthly Operating Repts for June 1998 for Limerick Generating Station,Units 1 & 2
	ML20236P978
Person / Time
Site:	Limerick
Issue date:	06/30/1998
From:	Grime J, Hinchey P; PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	; NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
	NUDOCS 9807170233
	Download: ML20236P978 (7)
	v • d • e

__________________________-___ - _

. . Limwick G2nusting Stztion A

Y PECO NUCLEAR-

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PO Box 2300 A UNir of PfCO Ewcr Samtoga, PA 19464 0920 T.S.6.9.1.6 July 15,1998 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 I and 2 Enclosed are the monthly operating reports for Limerick Units 1 and 2 for the month of June 1998 forwarded pursuant to Technical Specification 6.9.1.6. j Very truly yours, -

k 3Jo h P. Grimes

.. Director - Site Engineering n

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' Enclosures 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, LGS Experience Assessment Branch, SSB2-4 9907170233 990630I.

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ADOCK 05000352 PDit.

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l Docket No. 50-352 Attachment to Monthly Operating Report for June 1998 Limerick Generating Station Unit i l' June 1 through June 30,1998 I. Narrative Summary of Operatino Experiences )

Unit 1 began the month of June 1998 at nominal 90% of rated thermal power (RTP),

continuing post-1R07 power ascension. Power was at 90% due to #1 and #2 heater level control problems.

On June 5,1998 at 0600 hours0.00694 days 0.167 hours 9.920635e-4 weeks 2.283e-4 months , the unit reached 100% of RTP.

On June 5,1998 at 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months power was reduced to 92% of RTP for turbine testing.

Power was restored to 100% of RTP on June 6,1998 at 1204 hours0.0139 days 0.334 hours 0.00199 weeks 4.58122e-4 months .

On June 6,1998 at 1619 hours0.0187 days 0.45 hours 0.00268 weeks 6.160295e-4 months power was reduced to 70% of RTP for control rod pattern adjustment. Power was restored to 100% of RTP on June 7,1998 at 1245 hours0.0144 days 0.346 hours 0.00206 weeks 4.737225e-4 months .

On June 7,1998 at 2113 hours0.0245 days 0.587 hours 0.00349 weeks 8.039965e-4 months power was reduced to 90% of RTP for control rod pattern adjustment. Power was restored to 100% of RTP on June 8,1998 at 0442 hours0.00512 days 0.123 hours 7.308201e-4 weeks 1.68181e-4 months .

On June 21,1998 at 1900 hours0.022 days 0.528 hours 0.00314 weeks 7.2295e-4 months power was reduced to 99% of RTP due to suspected

! filter / demineralized high inlet temperature. Power was restored to 100% of RTP on June 21,1998 at 2300 hours0.0266 days 0.639 hours 0.0038 weeks 8.7515e-4 months after it was determined that temperature instrument indicated false high.

Unit 1 ended this month at 100 % RTP.

11. Challenoes to Main Steam Safety Relief Valves l

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

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Docket No. 50-353 Attachment to Monthly Operating Report for June 1998 Limerick Generating Station I Unit 2 l June 1 through June 30,1998

1. Narrative Summary of Operatina Experiences Unit 2 began the month of June 1998 at 0% rated thermal power (RTP) with 2M23 maintenance outage in progress.

On June 14,1998 at 0108 hours0.00125 days 0.03 hours 1.785714e-4 weeks 4.1094e-5 months , reactor criticality was achieved during start up after the 2M23 maintenance outage. On June 16,1998 at 0642 hours0.00743 days 0.178 hours 0.00106 weeks 2.44281e-4 months , the main turbine generator was synchronized to the grid ending the 2M23 maintenance outage.

On June 18,1998 at 1030 hours0.0119 days 0.286 hours 0.0017 weeks 3.91915e-4 months , power increased to 100% of RTP.

On June 19, 1998 at 0015 hours1.736111e-4 days 0.00417 hours 2.480159e-5 weeks 5.7075e-6 months , power was reduced to 80% of RTP for a control rod pattem adjustment. Powerwas restored to 100% of RTP at 1740 hours0.0201 days 0.483 hours 0.00288 weeks 6.6207e-4 months .

On June 20,1998 at 2100 hours0.0243 days 0.583 hours 0.00347 weeks 7.9905e-4 months , power was reduced to 96% of RTP for main turbine valve testing and subsequent troubleshooting of combined intermediate valves. Power was restored to 100% of RTP on June 21,1998 at 0430 hours0.00498 days 0.119 hours 7.109788e-4 weeks 1.63615e-4 months .

On June 21,1998 at 0812 hours0.0094 days 0.226 hours 0.00134 weeks 3.08966e-4 months , power was reduced to 96% of RTP for main turbine I valve re-testing. Power was restored to 100% of RTP at 1052 hours0.0122 days 0.292 hours 0.00174 weeks 4.00286e-4 months .

On June 26,1998 at 1351 hours0.0156 days 0.375 hours 0.00223 weeks 5.140555e-4 months , power was reduced to 98% of RTP due to main turbine high back pressure. Powerwas restored to 100% of RTP at 1600 hours0.0185 days 0.444 hours 0.00265 weeks 6.088e-4 months .

On June 28,1998 at 0048 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months , power was reduced to 96% of RTP for main turbine valve testing. Powerwas restored to 100% of RTP at 0345 hours0.00399 days 0.0958 hours 5.704365e-4 weeks 1.312725e-4 months .

Unit 2 ended this operating period at 100% of RTP.

II. Challenoes to Main Steam Safety Relief Valves There were no challenges to the Main Steam Safety Relief Valves during the month of June. There were no challenges to the Main Steam Safety Relief Valves year-to-date.

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ML20236P978

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