ML032040049

June 2003 Monthly Operating Report for Dresden Nuclear Power Station, Units 2 & 3

ML032040049
Person / Time
Site:	Dresden
Issue date:	07/15/2003
From:	Hovey R Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RHLTR: #03-0047
Download: ML032040049 (7)

Text

ExekrnSM Exelon Generation www.exeloncorp.com Nuclear Dresden Generating Station 6500 North Dresden Road Morris, IL 60450-9765 Tel 815-942-2920 July 15, 2003 RHLTR: #03-0047 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 June 2003 In accordance with Technical Specifications, Section 5.6.4, "Monthly Operating Reports," we are submitting the June 2003 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 IlIl NRC Senior Resident Inspector - Dresden Nuclear Power Station

ATTACHMENT DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 MONTHLY OPERATING REPORT FOR JUNE 2003 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

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SUMMARY

OF OPERATING EXPERIENCE FOR JUNE 2003 A. UNIT 2 MONTHLY OPERATING EXPERIENCE

SUMMARY

On June 1, 2003, at approximately 1900 hours0.022 days <br />0.528 hours <br />0.00314 weeks <br />7.2295e-4 months <br />, load was reduced to approximately 70 percent electrical output to repair a leaking seal on the 2C Reactor Feedwater Pump. The Unit was returned to full power operation on June 3, 2003, at approximately 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br />.

On June 3, 2003, at approximately 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />, electrical output was decreased to approximately 70 percent to repair a bearing on the 2A Condensate Booster Pump. The Unit was returned to full power operation on June 5, 2003, at approximately 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br />.

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

B. UNIT 3 MONTHLY OPERATING EXPERIENCE

SUMMARY

On June 11, 2003, at approximately 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />, a Unit 3 power reduction was commenced and the unit was removed from service at approximately 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> to repair a hydrogen leak into the main generator stator cooling system.

Following repair, Unit 3 was returned to the grid on June 18, 2003 at approximately 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br />. The Unit returned to full power on June 20, 2003, at approximately 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />.

On June 28, 2003 at approximately 0100 power was reduced to approximately 54 percent to perform a control rod pattern adjustment. The Unit returned to full power on June 30, 2003 at approximately 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-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.

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II. OPERATING DATA STATISTICS A. Dresden Unit 2 Operating Data Report for June 2003 DOCKET NO. 050-237 DATE July 01, 2003 COMPLETED BY Don Hamilton TELEPHONE (815) 416-3585 OPERATING STATUS

1. REPORTING PERIOD: June 2003

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 Sta Is This Month Year to Date Cumulative

3. Reactor Critical - Hours 720 4,343 220,741

4. Hours Generator On-Line 720 4,343 212,252

5. Unit Reserve Shutdown - Hours 0 0 4

6. Net Electrical Energy Generated - MWHe 609,853 1 3,657,733 1 141,667,886 4

II. OPERATING DATA STATISTICS B. Dresden Unit 3 Operating Data Report for June 2003 DOCKET NO. 050-249 DATE July 01, 2003 COMPLETED BY Don Hamilton TELEPHONE (815) 416-3585 OPERATING STATUS

1. REPORTING PERIOD: June 2003

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

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

5. Reactor Critical - Hours 590 4,213 207,244

6. Hours Generator On-Line 550 4,146 199,222

9. Unit Reserve Shutdown - Hours 0 0 1

10. Net Electrical Energy Generated - MWHe 449,086 3,512,903 132,876,304 5

III. UNIT SHUTDOWNS A. Unit 2 Shutdowns for June 2003 NO DATE TYPE DURATION REASON (2) METHOD OF CORRECTIVE ACTIONS/

(1) (HOURS) SHUTTING DOWN COMMENTS

- - jREACTOR (3)

None B. Unit 3 Shutdowns for June 2003 NO DATE TYPE DURATION REASON (2) METHOD OF CORRECTIVE ACTIONS/

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

D3F43 20030611 F 170 A I A hydrogen leak was detected on the Generator generator stator cooling system. The Henrotor leak was repaired and the unit returned Hyloenk to service.

LEGEND:

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

F. Administrative G. Operational Eror (Explain)

H. Other (Explain)

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