Text

Monthly Operating Repts for Mar 1998 for Limerick Generating Station,Units 1 & 2
	ML20216F360
Person / Time
Site:	Limerick
Issue date:	03/31/1998
From:	Angus V; PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	;
Shared Package
ML20216F325	List: ML20216F320; ML20216F347; ML20216F360;
References
	NUDOCS 9804170042
	Download: ML20216F360 (8)
	v • d • e

.

Docket No. 50-352 Attachm:nt to Monthly Operating Report for March 1998 Limerick Generating Station Unit 1 March 1 through March 31,1998 l.

Narrative Summary of Operatino Exoeriences Unit 1 began the month of March 1998 at 93% of rated thermal power (RTP) due to limitations resulting from the clogged #2 jet pump riser nozzle. Folloviing evaluation, power was restored to 100% on March 6,1998 at 0150 hours0.00174 days 0.0417 hours 2.480159e-4 weeks 5.7075e-5 months with one remaining limitation for the jet pump problem which limits core flow to 105%.

For the remainder of the month, power was limited to less than 100% RTP in varying degrees by the jet pump problem, a control rod being fully inserted, and coastdown.

On March 6,1998 at 0156 hours0.00181 days 0.0433 hours 2.579365e-4 weeks 5.9358e-5 months , reactor power was reduced to 99% of RTP due to cyclic output from the Loose Parts Monitoring system. Power was restored to 100% RTP at 1600 hours0.0185 days 0.444 hours 0.00265 weeks 6.088e-4 months .

On March 7,1998 at 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months , power was reduced to 98% of RTP for main turbine valve testing. Power was restored to 99% RTP at 2300 hours0.0266 days 0.639 hours 0.0038 weeks 8.7515e-4 months .

On March 14,1998 at 2230 hours0.0258 days 0.619 hours 0.00369 weeks 8.48515e-4 months , power was reduced to 90% for main turbine control valve testing. Power was restored to 96% on March 15,1998 at 0108 hours0.00125 days 0.03 hours 1.785714e-4 weeks 4.1094e-5 months .

On March 21,1998 at 2000 hours0.0231 days 0.556 hours 0.00331 weeks 7.61e-4 months , power was reduced to 93% for main turbine valve testing. Power was restored to 94% at 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months .

On March 22,1998 at 0047 hours5.439815e-4 days 0.0131 hours 7.771164e-5 weeks 1.78835e-5 months , power was reduced to 85% of RTP due to Recirculation pump high temperatures and increasing drywell parameters due to tripping of the 124B load center breaker. Power was further reduced to 50% of RTP at 1400 hours0.0162 days 0.389 hours 0.00231 weeks 5.327e-4 months as a conservative effort to minimize overall effect on the plant. Power was restored to 87% of RTP on March 26,1998 at 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months .

On March 26,1998 at 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months , power was reduced to 60% of RTP for a rod pattern adjustment. Power was restored to 92% of RTP on March 27,1998 at 1110 hours0.0128 days 0.308 hours 0.00184 weeks 4.22355e-4 months .

On March 27,1998 at M00 hours, power was reduced to 88% of RTP due to high turbine backpremeure. Power was restored to 90% of RTP at 2300 hours0.0266 days 0.639 hours 0.0038 weeks 8.7515e-4 months .

On March 30,1998 at 1645 hours0.019 days 0.457 hours 0.00272 weeks 6.259225e-4 months , power was reduced to 86% of RTP due to high turbine backpressure. Power was restored to 90% of RTP on March 31,1998 at 0225 hours0.0026 days 0.0625 hours 3.720238e-4 weeks 8.56125e-5 months .

On March 31,1998 at 0950 hours0.011 days 0.264 hours 0.00157 weeks 3.61475e-4 months , power was reduced to 88% of RTP due to high turbine backpressure. Power was restored to 90% of RTP at 2120 hours0.0245 days 0.589 hours 0.00351 weeks 8.0666e-4 months .

9804170042 980412

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PDR ADOCK 05000352 R

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Unit 1 ended this month operating at 90% RTP due to the #2 jet pump problem, the single control rod being fully inserted, and the end of cycle coastdown.

11.

Challenaes to Main Steam Safety Relief Valves There were no challenges to the Main Steam Safety Relief Valves during the month of I

March and year to date.

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Dock:t No. 50-353 Attichm nt to Monthly Operating Report for March 1998 Limerick Generating Station Unit 2 March 1 through March 31,1998 l.

Narrative Summary of Operatina Experiences Unit 2 began the month of March 1998 at 96% rated thermal power (RTP). Power was at 96% of RTP for main turbine valve testing. Power was restored to 100% RTP on March 1 at 0600 hours0.00694 days 0.167 hours 9.920635e-4 weeks 2.283e-4 months .

On March 6,1998 at 2215 hours0.0256 days 0.615 hours 0.00366 weeks 8.428075e-4 months , power was reduced to 98% of RTP for main turbine valve testing.

On March 7,1998 at 0021 hours2.430556e-4 days 0.00583 hours 3.472222e-5 weeks 7.9905e-6 months , power was further reduced to 86% of RTP for main

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turbine control valve testing.

On March 7,1998 at 1100 hours0.0127 days 0.306 hours 0.00182 weeks 4.1855e-4 months , power was further reduced to 57% of RTP for rod pattern adjustment and scram timing 19 control rods. Power was restored to 100% RTP on March 8,1998 at 2235 hours0.0259 days 0.621 hours 0.0037 weeks 8.504175e-4 months , following troubleshooting of the BOP battery ground in the 2C reactor feedpump trip circuit.

On March 10,1998 at 0359 hours0.00416 days 0.0997 hours 5.935847e-4 weeks 1.365995e-4 months , power was reduced to 76% of RTP for rod pattern adjustment. Power was restored to 100% RTP at 0900 hours0.0104 days 0.25 hours 0.00149 weeks 3.4245e-4 months .

On March 14,1998 at 2038 hours0.0236 days 0.566 hours 0.00337 weeks 7.75459e-4 months , power was reduced to 9B% of RTP for main turbine valve testing. Power was restored to 100% RTP at 2121 hours0.0245 days 0.589 hours 0.00351 weeks 8.070405e-4 months .

On March 21,1998 at 2103 hours0.0243 days 0.584 hours 0.00348 weeks 8.001915e-4 months , power was reduced to 98% of RTP for main turbine valve testing. Power was restored to 100% RTP at 2220 hours0.0257 days 0.617 hours 0.00367 weeks 8.4471e-4 months .

On March 29,1998 at 0150 hours0.00174 days 0.0417 hours 2.480159e-4 weeks 5.7075e-5 months , power was reduced to 97% of RTP for main turbine valve testing. Power was restored to 100% RTP at 0234 hours0.00271 days 0.065 hours 3.869048e-4 weeks 8.9037e-5 months .

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

ll.

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

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ML20216F360

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