ML20081H973

Monthly Operating Rept for May 1991 for Arkansas Nuclear One Unit 1

ML20081H973
Person / Time
Site:	Arkansas Nuclear
Issue date:	05/31/1991
From:	Hayes K ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20081H969	List: 1CAN069110, Forwards Monthly Operating Rept for May 1991 for Arkansas Nuclear One & Revised Monthly Operating Rept for Apr 1991 for Arkansas Nuclear One ML20081H973 ML20081H979
References
NUDOCS 9106200233
Download: ML20081H973 (4)

Text

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OPERATING DATA REl' ORT DOCKET NO:

50-313 DATE:

lune. 1921 COMPLETED BY: K. R. Ilayes TELEP110NE:

_(M 11 964-5535 QPERATING_SIAIES 1.

Unit Name: Arkansas Nucitar One - Unit 1 2.

Reporting Period:.tiav 1-31._1991 3.

Licensed Thermal Power (MWt):

2.568 4.

Nameplate Rating (Gross MWe): SJ)2. 74 5.

Design Electrical Rating (Net MWe):

850 6.

Maximum Dependable Capacity (Gross MWe): D32 7.

Maximum Dependable Capacity (Net MWe):

836 8.

If Changes Occur in Capacity Ratings (Items Number 3 'through 7) Since Last Report, Give Reasons:

9.

Power Level To Which Restricted.

If Any (Net. MWe): Hnno 10.

Reasons For Restrictions.

If Any: None t10 Hill YR-TO-DATE GEitJltallYE 11.

Ilours in Reporting Period....

744.0 3,623.0 144,186.0 12.

Number of Ilours Reactor was Critical.....................

732.8 3,012.8 100,724.2 13.

Reactor Reserve Shutdown llours 0.0 0.0 5,044.0 14.

Ilours Generator On-l.ine......

726.2 2,876.2 98,614.9 15.

Unit Reserve Shutdown llouts 0.0 0.0 817.5 16.

Gross Thermal Energy Generated 1,850,261.0 7,112,699.0 222,168,816.0 (MWil) 17.

Gross Electrical Energy 632,390.0 2,424,345.0 73,848,040.0 Generated (MWil) 18.

Not Electrical Energy Generated (MWil) 604,434.0 2,302,189.0 70,136,924.0 19.

Unit Service Factor..........

97.6 79.4 68.4 20.

Unit Availability Factor 97.6 79.4 69.0 21.

Unit Capacity Factor (Using MDC Net) 97.2 76.0 58.2 22.

Unit Capacity Factor 95.6 74.8 57.2 (Using DEC Net) 23.

Unit Forced Outage Rate 2.4 8.7 13.0 24.

Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

None 25.

If Shut Down At End of Report Period.

Estimated Date of Startap:

26.

Units in Test Status (Prior t.o Commercial Operation):

Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION 9106200233 910617 PDR ADOCK 05000313 R

PDR

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO:

50-313 UNIT:

One DATE:

June, 1991 COMPLETED BY: K. R. Ilayes_

TELEP110NE:

Q01) 964-5535 MONTil day. 1991 DAY AVERAGE DAILY POWER LEVEL (MWe-Net) 1..............

846 2

845 3.......

846 4..............

844 5..............

845 6..............

845 7.

844 8..............

833 9............

845 10.............

844 11.............

843 12.............

843 13.............

840 14.............

840 15.............

840 16.............

840 17.............

840 18.............

838 19.............

837 20 838 21.............

323 22.............

519 23.............

838 24.............

834 25.............

836 26.............

835 27.............

833 28.............

832 29 833 30.............

833 31.............

832 AVGS:

812 INSTE.UCTION On this format, list the average daily unit power level in MWe-Net for each day in reporting month. Compute to the nearest whole megawatt.

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- - _ ~... -.

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+-

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NRC HONTilhY OPERATING rep 0RT 1

OPERAT]NG

SUMMARY

H

)

HAY 1991 J

UNIT ONE l

Unit One' began the month operating at 100% full power, and operated in.this condition until:0605 hours on the eighth. At that time, a power reduction to 95% was required due to oscillations of the #4 turbine throttle valve.

Following repairs, the unit was returned to full power at 1340 hours0.0155 days <br />0.372 hours <br />0.00222 weeks <br />5.0987e-4 months <br /> on the eighth.

On thh twenty-first at 0951 hours0.011 days <br />0.264 hours <br />0.00157 weeks <br />3.618555e-4 months <br />, the unit experienced an automatic reactor trip caused by the loss of all Main Foodwater. -This condition was due to the loss'of 480 V power to both Feedwater Pumps' control oil systems.

- The unit was returned to operation at 0340 hours0.00394 days <br />0.0944 hours <br />5.621693e-4 weeks <br />1.2937e-4 months <br /> on the twenty-second and regained full power at 1357 hours0.0157 days <br />0.377 hours <br />0.00224 weeks <br />5.163385e-4 months <br /> on the same day. The-unit operated at full power for the remainder of May.

UNIT SHUTDOWNS AND POWER REDUCTIONS

~

REPORT FOR MAY, 1991 DOCKET NO.

50-313 UNIT NAME One DATE June

11. 1991 COMPLETED BY K. R. Hayes TELEPHONE (501) 964-5535 Cause 6 Corrective Method of Licensee Duration Shutting Event System Component Action to 5

No.

Date Type Hours)

Reason Down Reactor' Report #

Code' Code Prevent Recurrence 2

91-09 910508 F

7.6 A

5 N/A TG FCV Power reduction due to turbine throttle valve oscillations 91-10 910521 F

28.1 H

3 50-313-91005 EC BKR Automatic Reactor Trip on loss of all Main Feedwater caused by loss of 480 V power to both main feedwater pumps.

6 1

3 Method:

Exhibit G - Instructions F: Forced Reason:

I S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenance or Test 2-Manual Scram.

Entry Sheets for Licensee C-Refueling 3-Automatic Scram.

Event Report (LER) File (NUREG-D-Regulatory Restriction 4-Continuation 1022)

E-Operator Training &

5-Load Reduction 5

License Examination 9-Other Exhibit I - Same Source F-Administrative G-Operational Error (Explain)

H-Other (Explain)