Text

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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reduction in core average temperature in an attempt to inhibit corrosion of steam generator tubes within the j

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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 27 7

372 17 374 373 8

372 18 360 28 376 9

374 19 382 29 377 I

10 374 20 364 30 375 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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1 NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE Docket No.

50-266 Unit Name Point Beach Unit 1 Date February 5, 1981 Completed By C. W.

Fay 3

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 0.0386 hours 2.29828e-4 weeks 5.28895e-5 months , 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 0.142 hours 8.449074e-4 weeks 1.944355e-4 months 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 0.641 hours 0.00381 weeks 8.77433e-4 months 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 0.147 hours 8.730159e-4 weeks 2.00904e-4 months on January 18, 1981, upon successful completion of the turbine stop valve tests.

At 0139 hours0.00161 days 0.0386 hours 2.29828e-4 weeks 5.28895e-5 months 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 0.0389 hours 2.314815e-4 weeks 5.327e-5 months and power was restored to the 1B42 motor control center at 0141 hours0.00163 days 0.0392 hours 2.331349e-4 weeks 5.36505e-5 months 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 0.0853 hours 5.076058e-4 weeks 1.168135e-4 months to 0605 hours0.007 days 0.168 hours 0.001 weeks 2.302025e-4 months at the request of Power Supply.

To accomplish turbine stop valve testing, power was reduced to 340 MWe from 2127 hours0.0246 days 0.591 hours 0.00352 weeks 8.093235e-4 months on January 3, 1981, to 0032 hours3.703704e-4 days 0.00889 hours 5.291005e-5 weeks 1.2176e-5 months on January 4, 1981.

The last load reduction of this month occurred on January 11, 1981, from 0300 hours0.00347 days 0.0833 hours 4.960317e-4 weeks 1.1415e-4 months to 0357 hours0.00413 days 0.0992 hours 5.902778e-4 weeks 1.358385e-4 months 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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ML19345F579

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