ML19345F579

Monthly Operating Repts for Jan 1981

ML19345F579
Person / Time
Site:	Point Beach
Issue date:	02/05/1981
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML19345F577	List: ML19345F576 ML19345F579
References
NUDOCS 8102180440
Download: ML19345F579 (8)

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DOCKET NO. 50-266 UNIT NAME Point Beach Unit 1 DATE February 5, 1981 COMPLETED BY c. W. Fav TELEPHONE 414/277-2811 AVERAGE DAILY UNIT POWER LEVEL MONTH January, 1981 AVERAGE AVERAGE AVERAGE DAILY DAILY DAILY POWER LEVEL POWER LEVEL FOWER LEVEL DAY MWe NET DAY MWe NET DAY MWe NET 1 309 11 37s 21 372 2 315 12 374 22 372 3 323 13 377 23 372 4 323 14 376 24 172 5 359 15 335 25 372 6 371 16 372 26 373 7 372 17 374 _

27 373 8 372 18 360 28 376 9 374 19 382 29 377 10 374 20 364 30 375 I 31 377 AD-28A (1-77)

DOCKET NO. 50-301 UNIT NAME Point Beach Unit 2 DATE February 5, 1981 COMPLETED BY C. W. Fay TELEPIIONE 414/277-2811 AVERAGE DAILY UNIT POWER LEVEL MONTH January, 1981 AVERAGE AVERAGE AVERAGE DAILY DAILY DAILY POWER LEVEL POWER LEVEL POWER LEVEL DAY MWe NET DAY MWe NET DAY MWe NET 1 471 11 481 21 483 2 484 12 486 22 484 3 472 13 483 23 484 4 482 14 483 24 485 5 485 15 agg 25 486 6 484 16 ago 26 485 7 483 17 484 27 487 8 482 18 4 86 28 484 9 482 19 483 29 483 10 481 20 483 30 480 31 483 AD-28A (1-77)

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NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE Docket No. 50-266 Unit Name Point Beach Unit 1 Date February 5, 1981 3

Completed By C. W. Fay Telephone 414/277-2811 4

Unit 1 operated at 390 MWe net throughout the period

- with two load reductions. On January 2, 1981, at 0139 hours0.00161 days <br />0.0386 hours <br />2.29828e-4 weeks <br />5.28895e-5 months <br />, a turbine runback occurred which reduced the load to 250 MWe.

This runback was caused by the tripping of a safeguards supply breaker and is discussed below. Unit 1 returned to 350 MWe l

at 0511 hours0.00591 days <br />0.142 hours <br />8.449074e-4 weeks <br />1.944355e-4 months <br /> on January 2, 1981. Upon the completion'of

! fuel conditioning requirements, the unit returned to its prerefueling output of 390 MWe. The second load reduction commenced at 2306 hours0.0267 days <br />0.641 hours <br />0.00381 weeks <br />8.77433e-4 months <br /> on January 17,'1981, to 275 MWe to j facilitate turbine stop valve testing. Full load of 390 MWe l

was achieved at 0528 hours0.00611 days <br />0.147 hours <br />8.730159e-4 weeks <br />2.00904e-4 months <br /> on January 18, 1981, upon successful completion of the turbine stop valve tests.

At 0139 hours0.00161 days <br />0.0386 hours <br />2.29828e-4 weeks <br />5.28895e-5 months <br /> on January 1, 1981, the supply breaker for safeguards motor control center 1B42 tripped while performing a monthly ventilation system test. An automatic turbine runback reduced the load on Unit 1 to approximately 50 % power. The loss of 1B42 resulted in the ' loss of the lYO4 instrument bus which caused a momentary violation of the -

minimum degree of redundancy required by the Technical Specifications for containment spray actuation and steam line isolation. The instrument bus was shif ted to -its alternate power supply at 0140 hours0.00162 days <br />0.0389 hours <br />2.314815e-4 weeks <br />5.327e-5 months <br /> and power was restored to the 1B42 motor control center at 0141 hours0.00163 days <br />0.0392 hours <br />2.331349e-4 weeks <br />5.36505e-5 months <br /> the same morning.

The cause of the breaker trip was found to be dust in the -

insMntaneous trip valve on the breaker. The breaker was cle ar_e d , tested, and returned to service. (Licensee Event Report No. 81-001/OlT-0 )

The only safety-related maintenance performed during

! the period was the_ repair of 1B42 motor control center supply breaker as described in the prior narrative.

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NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE Docket No. 50-301' Unit Name Point Beach Unit 2 Date February 5, 1981 Completed By C.W. Fay Telephone 414/277-2811 Unit 2 operated at 495 MWe net throughout the period with three load reductions. On January 1, 1981, load was reduced to 380 MWE from 0307 hours0.00355 days <br />0.0853 hours <br />5.076058e-4 weeks <br />1.168135e-4 months <br /> to 0605 hours0.007 days <br />0.168 hours <br />0.001 weeks <br />2.302025e-4 months <br /> at the request of Power Supply. To accomplish turbine stop valve testing, power was reduced to 340 MWe from 2127 hours0.0246 days <br />0.591 hours <br />0.00352 weeks <br />8.093235e-4 months <br /> on January 3, 1981, to 0032 hours3.703704e-4 days <br />0.00889 hours <br />5.291005e-5 weeks <br />1.2176e-5 months <br /> on January 4, 1981. The last load reduction of this month occurred on January 11, 1981, from 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br /> to 0357 hours0.00413 days <br />0.0992 hours <br />5.902778e-4 weeks <br />1.358385e-4 months <br /> to perform crossover steam dump testing.

No licensee reportable events were filed during this period.

Safety-related maintenance over this period included repair of the "A" charging pump varidrive as well as piping support inspection per NRC IE Bulletin No. 79-14.

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