ML022960539

September 2002 Monthly Operating Report for Dresden, Units 2 and 3

ML022960539
Person / Time
Site:	Dresden
Issue date:	10/15/2002
From:	Hovey R Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RHLTR: #02-0073
Download: ML022960539 (7)

Text

Exekrn..

Exelon Generation Dresden Generating Station wwwexeloncorp corn Nuclear 6500 North Dresden Road Morris, IL60450-9765 Tel 815-942-2920 October 15, 2002 RHLTR: #02-0073 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001 Dresden Nuclear Power Station, Units 2 and 3 Facility Operating License Nos. DPR-19 and DPR-25 Docket Nos. 50-237 and 50-249

Subject:

Monthly Operating Report for September 2002 In accordance with Technical Specifications, Section 5.6.4, "Monthly Operating Reports," we are submitting the September 2002 Monthly Operating Report for Dresden Nuclear Power Station (DNPS), Units 2 and 3.

Should you have any questions concerning this letter, please contact Mr. Jeff Hansen, Regulatory Assurance Manager, at (815) 416 - 2800.

Respectfully, R. J. Hovey Site Vice President Dresden Nuclear Power Station Attachment cc: Regional Administrator - NRC Region III NRC Senior Resident Inspector - Dresden Nuclear Power Station

ATTACHMENT DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 MONTHLY OPERATING REPORT FOR SEPTEMBER 2002 EXELON GENERATION COMPANY, LLC FACILITY OPERATING LICENSE NOS. DPR-19 AND DPR-25 NRC DOCKET NOS. 50-237 AND 50-249 I

TABLE OF CONTENTS I. Summary of Operating Experience A. Unit 2 Monthly Operating Experience Summary B. Unit 3 Monthly Operating Experience Summary II. Operating Data Statistics A. Operating Data Report - Dresden Unit 2 B. Operating Data Report - Dresden Unit 3 III Unit Shutdowns A. Unit 2 Shutdowns B. Unit 3 Shutdowns IV. Challenges to Safety and Relief Valves 2

I.

SUMMARY

OF OPERATING EXPERIENCE FOR SEPTEMBER 2002 A. UNIT 2 MONTHLY OPERATING EXPERIENCE

SUMMARY

On September 1, 2002, Unit 2 power was reduced to perform maintenance on Feedwater and Condensate pumps, and also to perform SCRAM Timing of Control Rod Drives. During the planned down power, load was reduced to approximately 490 MWe. Following the completion of the activities the plant was returned to full power on September 3, 2002. With the exception of short periods for routine maintenance and surveillances, Unit 2 operated at full power throughout the remainder of the period.

B. UNIT 3 MONTHLY OPERATING EXPERIENCE

SUMMARY

Unit 3 is operating at the end of its seventeenth operating cycle. Unit 3 operated throughout the month at reduced power due to its end of cycle coast down. Unit 3 is scheduled to begin the refueling outage on October 08, 2002.

On September 7, 2002, power was reduced to approximately 675 MWe to facilitate removal of the high-pressure feedwater heaters to increase the unit's output during the coast down. Following the removal of the heaters, an increased turbine thrust bearing temperature was observed. It was believed that an extraction steam imbalance in the turbine resulted in higher thrust bearing temperatures. Additionally, the 'C' low-pressure heaters were removed from service on September 13, 2002. On September 26, extraction steam was restored to one of the D heaters to balance the turbine load and reduce turbine thrust bearing temperature. For the remainder of the reporting period, Unit 3 operated at the maximum attainable power except for short periods for routine maintenance, and surveillances.

3

II. OPERATING DATA STATISTICS A. Dresden Unit 2 Operating Data Report for September 2002 DOCKET NO. 050-237 DATE October 02, 2002 COMPLETED BY Don Hamilton TELEPHONE (815) 416-3585 OPERATING STATUS

1. REPORTING PERIOD: September 2002

2. CURRENTLY AUTHORIZED POWER LEVEL (MWth): 2,957 MAXIMUM DEPENDABLE CAPACITY (MWe NET): 850 (estimated)

DESIGN ELECTRICAL RATING (MWe Net): 867 Unit Two Monthly Operating Status This Month Year to Date Cumulative

3. Reactor Critical - Hours 720 6,551 214,189

4. Hours Generator On-Line 720 6,551 205,700

5. Unit Reserve Shutdown - Hours 0 0 4

6. Net Electrical Energy Generated - MWHe 607,988 5,629,756 136,112,437 4

II. OPERATING DATA STATISTICS B. Dresden Unit 3 Operating Data Report for September 2002 DOCKET NO. 050-249 DATE October 02, 2002 COMPLETED BY Don Hamilton TELEPHONE (815) 416-3585 OPERATING STATUS

1. REPORTING PERIOD: September 2002

2. CURRENTLY AUTHORIZED POWER LEVEL (MWth): 2,527 MAXIMUM DEPENDABLE CAPACITY (MWe Net): 773 DESIGN ELECTRICAL RATING (MWe Net): 795 Unit Three Monthl] Operating Status This Month Year to Date Cumulative

5. Reactor Critical - Hours 720 6,311 201,329

6. Hours Generator On-Line 720 6,267 193,428

9. Unit Reserve Shutdown - Hours 0 0 1

10. Net Electrical Energy Generated - MWHe 489,923 4,792,061 128,094,596 5

IlI. UNIT SHUTDOWNS A. Unit 2 Shutdowns for September 2002 NO DATE TYPE DURATION REASON (2) METHOD OF CORRECTIVE ACTIONS/

(1) (HOURS) SHUTTING DOWN COMMENTS REACTOR(3)

None B. Unit 3 Shutdowns for September 2002 NO DATE TYPE DURATION REASON (2) METHOD OF CORRECTIVE ACTIONS/

(1) (HOURS) SHUTTING DOWN COMMENTS REACTOR(3)

None LEGEND:

(1) Tyne: (2) Reason (3) Method F - Forced A Equipment Failure (Explain) 1. Manual S - Scheduled B. Maintenance or Test 2. Manual Scram C. Refueling 3. Automatic Scram D. Regulatory Restriction 4. Other (Explain)

E. Operator Training & Licensing Exam 5. Load Reduction F. Administrative G. Operational Error H. Other (Explain)

IV. Challen2es to Safety and Relief Valves Unit 2 None Unit 3 None 6