ML022380064

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

ML022380064
Person / Time
Site:	Dresden
Issue date:	08/15/2002
From:	Hovey R Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RHLTR: #02-0060
Download: ML022380064 (7)

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Exelon Generation www exeloncorp corn Nuclear Dresden Generating Station 6500 North Dresden Road Morris, IL60450-9765 Tel 815-942-2920 August 15, 2002 RHLTR: #02-0060 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 July 2002 In accordance with Technical Specifications, Section 5.6.4, "Monthly Operating Reports," we are submitting the July 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, RPi.HIovey Site Vice Preside t 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 JULY 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 JULY 2002 A. UNIT 2 MONTHLY OPERATING EXPERIENCE

SUMMARY

Between July 24 and 25, 2002, Unit 2 reduced power to approximately 710 MWe to repair a leak on the 2B Feedwater pump. With the exception of short periods for routine maintenance and surveillances, Unit 2 operated throughout the remainder of the period at full power B. UNIT 3 MONTHLY OPERATING EXPERIENCE

SUMMARY

On July 15, 2002, Unit 3 was taken off-line due to a failure of the turbine front standard permanent magnet generator. Although the generator was taken off-line, the reactor remained critical. The unit was returned to service on July 16, 2002.

On July 21, 2002, Unit 3 experienced a reactor scram due to a main turbine trip, which resulted from a failure of the turbine shaft main oil pump. Repairs were completed and the unit was returned to service on July 25, 2002.

Between July 26 and 28, 2002, Unit 3 power was reduced to approximately 760 MWe due to a failure on the 3A Circulating Water pump. The pump repair was completed on July 28, 2002. For the remainder of the period, Unit 3 operated at full power except for short periods for routine maintenance, surveillances, or lack of demand.

3

II. OPERATING DATA STATISTICS A. Dresden Unit 2 Operating Data Report for July 2002 DOCKET NO. 050-237 DATE August 05, 2002 COMPLETED BY Don Hamilton TELEPHONE (815) 416-3585 OPERATING STATUS

1. REPORTING PERIOD: July 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 744 5,087 212,725

4. Hours Generator On-Line 744 5,087 204,236

5. Unit Reserve Shutdown - Hours 0 0 4

6. Net Electrical Energy Generated - MWHe 640,252 4,378,859 134,861,540 4

II. OPERATING DATA STATISTICS B. Dresden Unit 3 Operating Data Report for July 2002 DOCKET NO. 050-249 DATE August 05, 2002 COMPLETED BY Don Hamilton TELEPHONE (815) 416-3585 OPERATING STATUS

1. REPORTING PERIOD: July 2002

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

5. Reactor Critical - Hours 682 4,847 199,865

6. Hours Generator On-Line 657 4,803 191,964

9. Unit Reserve Shutdown - Hours 0 0 1

10. Net Electrical Energy Generated - MWHe 492,947 13,734,719 127,037,254 5

• ,'r" Ill. UNIT SHUTDOWNS A. Unit 2 Shutdowns for July 2002 NO DATE TYPE DURATION REASON (2) METHOD OF CORRECTIVE ACTIONS/

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

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

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

D3F39 020715 F 8 A 4 The generator was removed from service due to failure of the turbine critical during the front standard permanent magnet time that the generator (PMG). The PMG was and a temporary generator was offline. removed from service modification was implemented.

D3F40 020721 F 79 A 3 The reactor scrammed due to a main turbine trip due to the failure of the turbine shaft main oil pump. The pump was repaired and the unit returned to service.

LEGEND:

(1) T ye: (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. Challenges to Safety and Relief Valves Unit 2 None Unit 3 None 6