ML20217F909

Monthly Operating Repts for Sept 1999 for LaSalle County Stations,Units 1 & 2.With 991015 Ltr

ML20217F909
Person / Time
Site:	LaSalle
Issue date:	09/30/1999
From:	Shaun Anderson, Jamie Benjamin COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9910210121
Download: ML20217F909 (8)

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Tcl H 1435%'61 October 15,1999 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 LaSalle County Station, Units 1 and 2 Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373 and 50-374

Subject:

Monthly Operating Report Enclosed is the Commonwealth Edison (Comed) Company, LaSalle County Station, Monthly Operating Report covering the period from September 1,1999 through September 30,1999. This report is submitted in accordance with Technical Specification 6.6.A.5.

Should you have any questions concerning this letter, please contact Mr. Frank A. Spangenberg,111, Regulatory Assurance Manager, at (815) 357-6761, extension 2383.

Respectfully,

~

A -

Jeffrey A. Benjamin Site Vice President LaSalle County Station Enclosure cc: . Regional Administrator - NRC Region Ill NRC Senior Resident inspector - LaSalle County Station hY , I 9910210121 990930 PDR R ADOCK 05000373 PDR A t nicom n,miuny

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LASALLE COUNTY STATION )

UNIT 1 AND UNIT 2 MONTHLY PERFORMANCE REPORT COMMONWEALTH EDISON COMPANY NRC DOCKET NO. 50-373 l NRC DOCKET NO. 50-374 i LICENSE NO. NPF-11 LICENSE NO. NPF-18

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• l TABLE OF CONTENTS l

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l. Monthly Report for LaSalle Unit One A. Operating Data Summary ll B. Unit Shutdowns and Operating Summary C.' Unique Reporting Requirements

ll. Monthly Report for LaSalle Unit Two A. Operating Data Summary l

' B. Unit Shutdowns and Operating Summary l C. Unique Reporting Requirements l-l l

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1 L' Monthly Report for LaSalle County Station Unit One--September,1999 A. OPERATING DATA

SUMMARY

FOR UNIT ONE DOCKET NO.: 50-373

, UNIT: LaSalle One DATE: October 4,1999 COMPLETED BY: S. Anderson TELEPHONE: (815) 357-6761 x2620

1. Reporting Period: September,1999 Gross Hours: 720

2. Currently Authorized Power Level: 3,323 (MWt)

Design Electrical Rating: 1,078 (MWe-net)

Max Dependable Capacity: 1,036 (MWe-net)

3. Power Level To Which Restricted (if Any): None

'4. Reasons For Restriction (if Any): N/A THIS MONTH YEAR-TO-DATE CUMULATIVE

5. Reactor Critical Hours 678.4 6509.4 88,633.3

6. Reactor Reserve 0.0 0.0 1,641.2 Shutdown Hours

7. Hours Generator On- 660.5 6491.5 86,505.1 Line

8. Unit Reserve 0.0 0.0 1.0 Shutdown Hours 9.. Gross 1hermal 1,875,997 20,162,431 258,841,781 Energy (MWHt)

10. . Gross Electric Energy 627,802 6,796,413 86,658,664 (MWHe) _

11. Net Electrical Energy 605,174 6,594,597 83,600,723 (MWHe)

12. Reactor Service 94.2 99.4 64.2 Factor (%)

13. Reactor Availability 94.2 99.4 65.4 Factor (%)

14. Unit Service Factor 91.7 99.1 62.7

(%)

15. Unit Availability 91.7 99.1 62.7 Facter

16. Unit Capacity Fector 81.1 97.2 58.4 (MDC)

17. Unit Capacity Factor 78.0 93.4 56.2 (design MWe)

18. Unit Forced Outage 8.3 0.9 13.3 Factor (%)

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19. Shutdowns Scheduled Over Next 6 Months: L1R08 - October 23,1999

20. If Shutdown at End of Report Period, Date of Startup: N/A i

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l B. UNIT SHUTDOWNS AND OPERATING

SUMMARY

REPORT MONTH SEPTEMBER 1999 NO DATE- TYPE (1) DURATION REASON METHOD OF CORRECTIVE ACTIONS /

L (HOURS)* (2)' SHU1 TING COMMENTS

! DOWN l REACTOR (3) 1 9/2/99 F 59.5 G 3 While taking a subloop of the feedwater level control system out of service, an operator mistakenly placed the wrong subloop switch in manual.' While in manual, the automatic flow demand signal decayed to near zero. When the error was discovered, the operator then failed to stop and notify supervision. Instead, he placed the 'A'subloop switch back in Automatic, at which time the TDRFP control valves responded to the zero flow demand by closing. The resulting rapid reduction in flow caused the reactor to l _.

automatically scram on low level.

Year-to-date for, ,J outage hours = 59.5 Cumulative forced outage hours = 13,286.0 TABLE KEY:

(1) (3)

F: Forced Method:

S: Scheduled 1. Manual

2. Manual Scram

-(2) 3. Automatic Scram Reason: 4. Continuation

- A Equipment Failure (Explain) 5. Other (Explain)

B Maintenance or Test ' '

C Refueling '

. D Regulatory Restriction E Operator / Licensing Exam 1 F Administrative

~ G Operational Error (Explain)

L H Other (Explain) l l

SUMMARY

I LaSalle Unit 1 continued tc coast down during September, operating at the maximum power possible with the exception of the following:

o September 2,19991036 - In preparation for performance of feedwater level control 'B'subloop maintenance, the wrong subloop was taken out of service. The 'A'subloop control switch was mistakenly placed in Manual. The 'A'subloop automatic flow demand signal then decayed to near zero.

SUMMARY

(Continued)

When the error was discovered and the 'A'subloop control switch was placed back in Automatic, the corresponding feedwater pump turbine control valve went closed. The resulting rapid reduction in flow caused an automatic reactor scram on low water level.

The resulting forced outage (L1F36) lasted 59.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. The reactor was taken critical at 0414 on September 4,1999, and the generator was placed on line at 2208 on September 4,1999. The unit

, returned to the maximum power possible at approximately 2040 on September 7,1999.

o September 12,1999 0300 - A load drop was taken to support scheduled weekly control rod exercising and surveillance testing. Weekly control rod exercising was delayed due to the loss of position indication on one control rod. Load drop related activities were completed at 1450 on September 12, 1999. The unit then returned to the maximum power possible at approximately 0050 on September 13, 1999. '

o September 19,1999 0000 - A load drop was taken to support withdrawal of control rod 26-35 and weekly control rod exercising. These activities were completed at 0124. The load drop, including the ramp back to maximum possible power lasted 37.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />, with the unit returning to maximum available power at approximately 1330 on September 20,1999.

• September 26,1999 0300 - A load drop was taken to support weekly control rod exercising. Control rod exercising was delayed due to problems with the position indication of one control rod. Control rod exercising was completed at 1729. The ramp back to maximum available power was completed at approximately 0320 on September 27,1999. The entire load drop lasted 24.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

C. UNIQUE REPORTING REQUIREMENTS FOR UNIT ONE

1. Challenges other than routine surveillance testing to Safety / Relief Valve Operations-None

11. Major Changes to Radioactive Waste Treatment System-None

II; Monthly Report for LaSalle County Station Unit Two-September,1999 A OPERATING DATA

SUMMARY

FOR UNIT TWO DOCKET NO.: 50-374 UNIT: LaSalle Two DATE: October 4,1999

~ COMPLETED BY: S. Anderson TELEPHONE: (815) 357-6761 x2620

1. Reporting Period: September,1999 Gross Hours: 720

2. Currently Authorized Power Level: 3,323 (MWt)

Design Electrical Rating: 1,078 (MWe-net)

Max Dependable Capacity: 1,036 (MWe-net)

3. Power Level To Which Restricted (if Any): None

4. Reasons For Restriction (if Any): N/A THIS MONTH YEAR-TO-DATE CUMULATIVE

5. Reactor Critical Hours 720 4,143.6 81,172.0

6. Reactor Reserve 0.0 0.0 1,716.9 Shutdown Hours

7. Hours Generator On- 720 4,085.5 80,055.7 Line

8. Unit Reserve 0.0 0.0 0.0 Shutdown Hours 1 j

9. Gross Thermal 2,391,164 13,087,964 243,610,651 i Energy (MWHt)

10. Gross Electric Energy 818,022 4,433,922 81,609,846 i (MWHe)

11. Net Electrical Energy 789,454 4,276,809 78,250,452 (MWHe) '

12. Reactor Service 100.0 63.3 61.9 Factor (%)

13. Reactor Availability 100.0 63.3 63.2 Factor (%)

14. Unit Service Factor 100.0 62.4 61.1

(%)

15. Unit Availability 100.0 62.4 61.1 Factor

16. Unit Capacity Factor 105.8 63.0 57.6 (MDC)

17. Unit Capacity Factor 101.7 60.6 55.4 (design MWe)

18. Unit Forced Outage 0.0 37.6 19.1 Factor (%)

19. Shutdowns Scheduled Over Next 6 Months: None

20. If Shutdown at End of Report Period, Date of Startup: N/A

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1 B. UNIT SHUTDOWNS AND OPERATING

SUMMARY

REPORT MONTH SEPTEMBER 1999 l

. NO DATE TYPE (1) DURATION REASON METHOD OF CORRECTIVE ACTIONS /

(HOURS)* (2) SHUTTING COMMENTS DOWN REACTOR (3) l None l

Year-to-date forced outage hours = 2,466.3  ;

Cumulative forced outage hours = 18,858.6 I TABLE KEY:

(1) (3)

F: Forced Method: l S: Scheduled 1. Manual 1

2. Manual Scram (2) 3. Automatic Scram Reason: 4. Continuation A Equipment Failure (Explain) 5. Other (Explain) i B Maintenance or Test i C Refueling D Regulatory Restriction E Operator / Licensing Exam F Administrative G Operational Error (Explain)

H Other (Explain)

SUMMARY

LaSalle Unit 2 operated at full power throughout the month of September with the exception of the following:

o September 25,1999 0300 - A load drop was taken to support scheduled surveillance testing. This load '

drop lasted for approximately 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, with the unit returning to full power at 0408.

C. UNIQUE REPORTING REQUIREMENTS FOR UNIT TWO

1. Challenges other than routine surveillance testing to Safety / Relief Valve Operations-None

2. Major Changes to Radioactive Waste Treatment Systems-None