SVPLTR 04-0062, August 2004 Monthly Operating Report for Dresden Nuclear Power Station, Units 2 and 3

August 2004 Monthly Operating Report for Dresden Nuclear Power Station, Units 2 and 3

ML042660373
Person / Time
Site:	Dresden
Issue date:	09/15/2004
From:	Bost D Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
SVPLTR #04-0062
Download: ML042660373 (7)

Text

Exek niM Exelon Generation Company, LLC www.exeloncorp.com NucleaT Dresden Nuclear Power Station 6500 North Dresden Road Morris, IL 60450-9765 September 15, 2004 SVPLTR #04-0062 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Dresden Nuclear Power Station, Units 2 and 3 Facility Operating License Nos. DPR-19 and DPR-25 NRC Docket Nos. 50-237 and 50-249

Subject:

Monthly Operating Report for August 2004 In accordance with Technical Specifications, Section 5.6.4, "Monthly Operating Reports," we are submitting the August 2004 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, Danny G. Bost Site Vice President Dresden Nuclear Power Station Attachment cc: Regional Administrator- NRC Region IlIl NRC Senior Resident Inspector - Dresden Nuclear Power Station

ATTACHMENT DRESDEN NUCLEAR PONAWR STATION, UNITS 2 AND 3 MONTHLY OPERATING REPORT FOR AUGUST 2004 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

l. SUMMNIARY OF OPERATING EXPERIENCE FOR AUGUST - 2004 A. UNIT 2 MONTHLY OPERATING EXPERIENCE

SUMMARY

On August 8, at approximately 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br />, load was reduced to approximately 97% electrical output due to high turbine-generator bearing vibration. Additional power reductions occurred until approximately 0600 on August 14 when the unit was taken offline to repair a crack in the main generator housing. The unit returned online at approximately 2100 on August 21, but was held at approximately 78% electrical output due to high turbine-generator bearing vibrations. It remained at this output until the end of the month.

With the exception of short periods for routine maintenance, surveillances and the above occurrences, Unit 2 operated at full power throughout the reporting period.

B. UNIT 3 MONTHLY OPERATING EXPERIENCE

SUMMARY

On August 8, at approximately 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />, load was reduced to approximately 68% electrical output to perform a control rod pattern adjustment. The unit returned to full power operation at approximately 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br />.

On August 22, at approximately 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />, load was reduced to approximately 76% electrical output to perform a control rod pattern adjustment. The unit returned to full power operation at approximately 1100 hours0.0127 days <br />0.306 hours <br />0.00182 weeks <br />4.1855e-4 months <br />.

With the exception of short periods for routine maintenance, surveillances and the above occurrences, Unit 3 operated at full power throughout the remainder of the reporting period.

3

11. OPERATING DATA STATISTICS A. Dresden Unit 2 Operating Data Report for August 2004 DOCKET NO. 050-237 DATE September 1, 2004 COMPLETED BY Joseph Reda TELEPHONE (815) 416-3081 OPERATING STATUS

1. REPORTING PERIOD: August 2004

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

DESIGN ELECTRICAL RATING (MWe Net): 867 Unit 2 Monthly Operating Statu _

This Month Year to Date Cumulative

3. Reactor Critical - Hours 606 5,378 229,854

4. Hours Generator On-Line 561 5,290 221,198

5. Unit Reserve Shutdown - Hours 0 0 4

6. Net Electrical Energy Generated - MWHe . 430,710 4,511,339 149,224,600 4

II. OPERATING DATA STATISTICS B. Dresden Unit 3 Operating Data Report for August 2004 DOCKET NO. 050-249 DATE September 1, 2004 COMPLETED BY Joseph Reda TELEPHONE (815) 416-3081 OPERATING STATUS

1. REPORTING PERIOD: August 2004

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

DESIGN ELECTRICAL RATING (MWe Net): 867 Unit 3 Monthly Operating Statu This Month Year to Date Cumulative

3. Reactor Critical - Hours 744 5,688 217,016

4. Hours Generator On-Line 744 5,632 208,914

5. Unit Reserve Shutdown - Hours 0 0 1

6. Net Electrical Energy Generated - MWHe 644,356 4,836,669 1 141,163,930 5

II. UNIT SHUTDOWNS A. Unit 2 Shutdowns for August 2004 NO DATE TYPE DURATION REASON (2) METHOD OF CORRECTIVE ACTIONS/

(1) (HOURS) SHUTTING DOWN COMMENTS REACTOR (3) 3 8/14/04 F 183 A I Unit was manually shutdown to repair a (Repair of crack in crack in a weld of the main generator main generator) support rail.

B. Unit 3 Shutdowns for August 2004 LEGEND:

(1) Type: (2) Reason (3) Mlethod F- Forced A. Equipment Failure (Explain) I. Manual S - Scheduled B. Maintenance or Test 2. Manual Trip/ Scram C. Refueling 3. Automatic Trip / Scram D. Regulatory Restriction 4. Continuation E. Operator Training & Licensing Exam 5. Other (Explain)

F. Administrative G. Operational Error (Explain)

H. Other (Explain)

I'. Challenges to Safety and Relief Valves Unit 2 None Unit 3 None 6