SVPLTR 04-0036, May 2004 Monthly Operating Report for Dresden Nuclear Power Station, Units 2 and 3

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May 2004 Monthly Operating Report for Dresden Nuclear Power Station, Units 2 and 3
ML041670602
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 06/08/2004
From: Bost D
Exelon Generation Co, Exelon Nuclear
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
SVPLTR #04-0036
Download: ML041670602 (7)
v • d • e


Text

Exelkon..

Exelon Generation Company, LLC www.exeloncorp.com Nuclear Dresden Nuclear Power Station 6500 North Dresden Road Morris. IL 60450-9765 June 8, 2004 SVPLTR #04-0036 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 May 2004 In accordance with Technical Specifications, Section 5.6.4, "Monthly Operating Reports," we are submitting the May 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 POWER STATION, UNITS 2 AND 3 MONTHLY OPERATING REPORT FOR MAY 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 1I. 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

1.

SUMMARY

OF OPERATING EXPERIENCE FOR MAY - 2004 A. UNIT 2 MONTHLY OPERATING EXPERIENCE

SUMMARY

The unit began the month offline due to a trip of the 2A Reactor Recirculation pump. The unit returned online at approximately 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> on May 10 and returned to full power operation at approximately 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> on May 13.

On May 22, at approximately 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />, load was reduced to approximately 87% electrical output to perform control rod pattern adjustments. The unit returned to full power operation at approximately 0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br /> on May 22.

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 May 5, at approximately 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />, the unit experienced an automatic scram due to a loss of offsite power caused by switchyard equipment problems. The unit returned online at approximately 0200 on May 10 and returned to full power operation at approximately 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br /> on May 12.

On May 20, at approximately 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, load was reduced to approximately 85% electrical output to comply with operating procedures due to a low voltage condition in the 345 kV switchyard. The unit returned to full power operation at approximately 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br /> on May 21.

On May 21, at approximately 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />, load was reduced to approximately 89% electrical output due to equipment problems with the scram discharge volume vent and drain valves. The unit returned to full power operation at approximately 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br /> on May 22.

On May 29, at approximately 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />, load was reduced to approximately 51% electrical output to perform control rod pattern adjustments and other maintenance and testing. The unit returned to full power operation at approximately 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> on May 31.

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

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

1. REPORTING PERIOD: May 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 i This Month Year to Date Cumulative

3. Reactor Critical - Hours 532 3,308 227,784
4. Hours Generator On-Line 508 3,265 219,173
5. Unit Reserve Shutdown - Hours 0 0 4
6. Net Electrical Energy Generated - MWHe 426,520 2,809,065 1 147,522,326 4

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

1. REPORTING PERIOD: May 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 perating Status l This Month Year to Date Cumulative

3. Reactor Critical - Hours 652 3,480 214,808
4. Hours Generator On-Line 636 3,424 206,706
5. Unit Reserve Shutdown - Hours 0 l 0 1
6. Net Electrical Energy Generated - MWHe 528,916 2,918,741 139,246,002 5

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

(1) (HOURS) SHUTTING DOWN COMMENTS REACTOR (3) 2 04/28/04 F 236 A 2 During power ascension from the (May alone) (Mayalon)

(2 Reatorprevious (2A Reactor outage, due to a trip of thethe2Aunit was shutdown Reactor ec trip) Recirculation pump.

B. Unit 3 Shutdowns for May 2004 NO DATE TYPE DURATION REASON (2) METHOD OF CORRECTIVE ACTIONS/

(I) (HOURS) SHUTTING DOWN COMMENTS REACTOR (3) 3 05/05/04 F 108 A 3 Reactor scram due to a loss of offsite (osof offsite power caused by equipment problems in (Loss o swvitchyard.

fstthe power due to switchyard equipment problems)

LEGEND:

(1) Type: (2) Reason (3) Method F - Forced A. Equipment Failure (Explain) 1. 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)

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

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