SVPLTR 04-0028, April 2004 Monthly Operating Report for Dresden, Units 2 and 3

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April 2004 Monthly Operating Report for Dresden, Units 2 and 3
ML041560264
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 05/17/2004
From: Bost D
Exelon Generation Co, Exelon Nuclear
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
SVPLTR #04-0028
Download: ML041560264 (7)
v • d • e


Text

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Exelon Generation Company, LLC www.exeloncorp.com Nuclear Dresden Nuclear Power Station 6500 North Dresden Road Morris, IL 60450-9765 May 17, 2004 SVPLTR #04-0028 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 April 2004 In accordance with Technical Specifications, Section 5.6.4, 'Monthly Operating Reports," we are submitting the April 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, m/al2xQ 6/

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 APRIL 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

I.

SUMMARY

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

SUMMARY

On April 24, at approximately 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br />, the unit was taken offline to perform a planned outage to replace the EHC master trip solenoid valve. However, the outage was extended due to an unplanned reactor scram. The unit was returned online at approximately 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> on April 28.

On April 28, at approximately 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> during power ascension from the previous outage, the unit was shutdown due to a trip of the 2A Reactor Recirculation pump. The unit remained offline for the remainder 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 remainder of the reporting period.

B. UNIT 3 MONTHLY OPERATING EXPERIENCE

SUMMARY

On April 10, at approximately 1800 hours0.0208 days <br />0.5 hours <br />0.00298 weeks <br />6.849e-4 months <br />, load was reduced to approximately 97% electrical output to perform a control rod pattern adjustment. The unit returned to full power operation at approximately 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> on April 11.

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

II. OPERATING DATA STATISTICS A. Dresden Unit 2 Operating Data Report for April 2004 DOCKET NO. 050-237 DATE May 5, 2004 COMPLETED BY Joseph Reda TELEPHONE (815) 416-3081 OPERATING STATUS

1. REPORTING PERIOD: April 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 Status This Month Year to Date Cumulative

3. Reactor Critical - Hours 592 2,776 227,252
4. Hours Generator On-Line 573 2,757 218,665
5. Unit Reserve Shutdown - Hours 0 0 4
6. Net Electrical Energy Generated - MWHe 486,358 2,382,545 147,095,806 4

4-II. OPERATING DATA STATISTICS B. Dresden Unit 3 Operating Data Report for April 2004 DOCKET NO. 050-249 DATE May 5, 2004 COMPLETED BY Joseph Reda TELEPHONE (815) 416-3081 OPERATING STATUS

1. REPORTING PERIOD: April 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 0 erating Statu This Month Year to Date Cumulative

3. Reactor Critical - Hours 719 2,828 214,156
4. Hours Generator On-Line 719 2,788 206,070
5. Unit Reserve Shutdown - Hours 0 0 1
6. Net Electrical Energy Generated - MWHe 626,590 2,389,825 138,717,086 5

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

(1) (HOURS) SHUTTING DOWN COMMENTS REACTOR (3) 1 04124/04 S 90 B, H 5 The planned maintenance outage was to The unit was taken The unit was taken trip the turbine but maintain the reactor offline for planned offline manually, at approximately 20 % power.

maintenance of the However, after the However, after the turbine was tripped

. r tp t an automatic reactor scram occurred EHase ti uriea ripped from MSIV closure due to low main solenoid valve. an automatic reactor However, the reactor scram occurred. steam line pressure.

scram was due to MSIV closure.

2 04/28/04 F 56 A 2 During power ascension from the (April alone) 2A Reactor previous outage, the unit was shutdown Recirculation pump due to a trip of the 2A Reactor tip Recirculation pump.

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

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

None LEGEND:

(1) TvDe: (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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