NG-03-0186, February 2003 Monthly Operating Report for Duane Arnold Energy Center

February 2003 Monthly Operating Report for Duane Arnold Energy Center

ML030790336
Person / Time
Site:	Duane Arnold
Issue date:	03/14/2003
From:	Peifer M Nuclear Management Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GL-97-002, NG-03-0186
Download: ML030790336 (7)

Text

NM Committed to Nuclear Excellenc, Duane Arnold Energy Center Operated by Nuclear Management Company, LLC March 14, 2003 NG-03-0186 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station 0-P 1-17 Washington, DC 20555-0001

Subject:

Duane Arnold Energy Center Docket No: 50-331 Operating License: DPR-49 February 2003 Monthly Operating Report File: A-118d Please find enclosed the Duane Arnold Energy Center Monthly Operating Report. The report has been prepared in accordance with the guidelines of NRC Generic Letter 97-02: Revised Contents Of The Monthly Operating Report, and distribution has been made in accordance with DAEC Technical Specifications, Section 5.6.4.

Site Vice-President MAP/RBW Enclosures f I C'1-' j,.

SL 3277 DAEC Road 0 Palo, Iowa 52324-9785 Telephone: 319.851.7611

March 14, 2003 NG-03-0186 Page 2 of 2 cc:

Mr. James E. Dyer Ms. Parveen Baig Regional Administrator, Region III Iowa State Utilities Board U.S. Nuclear Regulatory Con-imiissi on Lucas Stafe Offi63-Buildinig 801 Warrenville Road Des Moines, IA 50319 Lisle, IL 60532-4351 Ms. Barbara Lewis Dr. William A. Jacobs, Jr.

McGraw-Hill, Inc. GDS Associates, Inc.

1200 G Street NW, Suite 1100 1850 Parkway Place, Suite 720 Washington, DC 20005 Marietta, GA 30068-8237 Mr. Dennis Murdock Mr. Dale Arends Central Iowa Power Cooperative Com Belt Power Cooperative Box 2517 1300 13th Street North Cedar Rapids, IA 52406 Humboldt, IA 50548 Document Control Desk IRMS INPO Records Center 700 Galleria Parkway NRC Resident Inspector Atlanta, GA 30339-5957 CTS Project Mr.-Darl Hood 1 White Flint North Mail Stop 8H4A 11555 Rockville Pike Rockville, MD 20852

OPERATING DATA REPORT DOCKET NO: 50-331 DATE: 03-14-2003 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 OPERATING STATUS Average Daily Net Power Level

1. Unit Name: Duane Arnold Energy Center 600 ~-

2. Reporting Period: February 2003 500

3. Licensed Thermal Power (MWth): 1912 Tech Spec. Amendment 243 and TSCR for etendedpower ...

uprate was implemented November 7, 2001 Currentoperating -400 thermalpower, as limited by balance-of-plantequipment, is 1790 300

4. Nameplate Rating (Gross MWe DER): 676.425 200 Currentratedoutput, adjustedforas-built balance-of-plant conditions is 614 0 100

5. Design Electrical Rating (Net MWe DER)- 581.4

6. Maximum Dependable Capacity (Gross MWe MDC): 593.1 C- C> )<

7. Maximum Dependable Capacity (Net MWe MDC): 565.5

8. If Changes Occur in Capacity Ratings (Items Number 3 through 7) since the last report, give reasons: N/A

9. Power Level to Which Restricted, If Any (Net MWe): N/A

10. Reasons for Restrictions, If Any: N/A Feb-03 2003 Cumulative Hours in Reporting Period- Feb

-0672.01- -- -1,416 0200C u246e120.0 t 351.5 + 1,095.5 i 195.34 1.3 Hours -Reactor Wasas Critical Number Number of Hours Reactor W Critical 351.5 1.095.5 195.341.3

13. Reactor Reserve Shutdown Hours 0.0 00 192.8

14. Hours Generator On-Line 324.5 1,068.5 191,141.8

15. Unit Reserve Shutdown Hours 00 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 546,642.5 1,866,137.8 280,603,563.9

17. Gross Electrical Energy Generated (MWH) 187,261.0 637,840.0 94,212,652.6 18 Net Electrical Energy Generated (MWH) 177,146.7 603,268.8 88,559,971.1 19 Unit Service Factor 48.3% 75.5% 77.7%

20. Unit Availability Factor 48.0% 75.5% 77.7%

21. Unit Capacity Factor (Using MDC Net) 46.6% 75.3% 70.7%

22. Unit Capacity Factor (Using DER Net) 45.3% 73.3% 68.6%

23. Unit Forced Outage Rate 51.7% 24.5% 8.4%

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO: 50-331 DATE: 03-14-2003 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 MONTH February 2003 Day Average Daily Power Level (MWe-Net) 1 35 2 0 3 0 4 0 5 ..- 0 . . .

6 0 7 0 8 0 9 0 10 0 11 0 12 0 13 0 14 0 15 19 16 289 17 566 18 579 19 589 20 587 21 586 22 589

.23- 590 24 588 25 587 26 587 27 587 28 587

1. N/A #N/A

1. N/A #N/A

1. N/A #N/A

REFUELING INFORMATION DOCKET NO: 50-331 DATE: 03-14-2003 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318

1. Name of facility. Duane Arnold Energy Center

2. Scheduled date for next refueling shutdown. Spring 2003

3. Scheduled date for restart following refueling. Spring 2003

4. Will refueling or resumption of operation thereafter require a technical specification change

-or other-license amendment?-No . .

5. Scheduled date(s) for submitting proposed licensing action and supporting information. N/A

6. Important licensing considerations associated with refueling, e.g., new or different fuel design or supplier, unreviewed design or performance analysis methods, significant changes in fuel design, new operating procedures. N/A

7. Current fuel assemblies inventory Number of Projected date of last Fuel refueling that can be Assemblies discharged (after allowing margin for maintenance of continuous full-core discharge cpity Inreceiving

- ------ for Reload

.......... ........ ....... 18 . . ............

. . 11............. .......................... ---.......---- ...............

............ .................... - - ---- 152

!.n t- !_----------

Installede "m 1*1* o core intoorreactor . . . . . ........ ...........

o......... .11......... . . . . . . . . . . . . .-. ......... ........... ..... ......... .........

...... , ... 33686 .....1 Discharged from core to Spent Fuel Storage Pool 1912 . ..........

.o .............

s..............__

Scheduled for transfer to Dry Fuel Storage November 2003 610 Installed capacity of Spent Fuel Storage Pool 2411 . 2008 Licen_-sed- capacity o'f.Sp ent Fuel Storage Pool (with re-racking) 2829 2014 Licensed capacity of Spent Fuel Storage Pool and Cask Pool (with 3152 reracking)

DOCKET NO. 50-331 DATE: 03-14-2003 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH: February 2003 No. Date Type Duration Reason Method of Licensee Cause (1) (Hours) (2) Shutting Event Down Report #

Reactor (3) 2 - 02/01/2003 F 347.5 A 2 20037-001, -Condenser-tube puncture (369.8 Effective- (Condenser pending due to impact from a full-power hours) tube failed deflector plate puncture) 1- F: Forced - Reason 3 - Method:

S: Scheduled A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Scram C-Refueling 3-Automatic Scram D-Regulatory Restriction 4-Continued E-Operator Training & License Examination 5-Reduced Load F-Administrative 9-Other (Explain)

G-Operational Error (Explain)

H-Other (Explain)

DOCKET NO.: 50-331 DATE: 03-14-2003 Unit: Duane Arnold Enercv Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 Monthly Operational Overview for February 2003 At the beginning of February, a plant shutdown was in progress following leakage of circulating water into the main condenser hotwell through a punctured condenser tube.

At 22:42 on January 31 ", the INFLUENT HIGH CONDUCTIVITY annunciator activated and the Abnormal Operating Procedure for Reactor Water / Condensate High Conductivity was entered at 23:09 when hotwell conductivity reached 0.13 pmho. At 00:18 and 00.19 on February I"t,the CONDENSER HOTWELL HIGH CONDUCTIVITY and RWCU HIGH CONDUCTIVITY annunciators activated. At 00:23 a reduction in Reactor Recirculation System Flow from 45 million lb/hour to 27 million lb/hour was commenced. At 00:54 hotwell conductivity had risen to 10.8 unmho, and an orderly shutdown had commenced. At 02:26, the 'lAl' and 'lA2' essential 4160KV power supplies were transferred from the Auxiliary Transformer to the Startup Transformer. At 02:33, with power at 1000 MWth, a manual scram was initiated.

Reactor coolant chemistry continued to degrade after the manual scram until the main circulating water system was secured at

-1353 and the condensate and feedwater systems were secured at-1356-on February-t-The-plant-was-placedin-Mb-di4,-Cb-od Shutdown, at 1620 on February 1, 2003.

The cause of the tube leak was a puncture due to impact from a failed deflector plate, downstream of 1E-5B Low Pressure Feedwater Heater dump valve CV-1340. The deflector plate broke free inside the condenser following approximately four months of continuous use of CV-1340 (versus the drain valve) for heater level control. The broken plate also dented and scored several other tubes, damaged two sections of the steam baffle plates in the condenser, and bent a third section of the steam baffle plates. The puncture allowed impure water to mix with water going into the reactor resulting in the conductivity increasing. Restoring reactor water quality through temporary water cleaning trucks and storage tanks constituted a significant portion of the forced outage. During the forced outage, DAEC also repaired a drywell cooler leak, which had been increasing, and made some additional preparations and validations for the upcoming March-April outage. An extensive analysis performed to determine the overall impact to the reactor and piping system of the conductivity increase did not identify any long term concerns. (LER 2003-00 1, pending)

Following completion of the repair and restoration of water quality, the plant was taken critical at 11:03 on February 140', and the turbine synchronized to the grid at 14:02 on February 15th. During the outage, the reactor was sub-critical 320.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />, and off-line for 347.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

Following is the allocation of production and losses: Full Power Electrical Capacity Factor Hours Output  % of 614 MWe Equivalent MWe ,.(Yarget Output) (FPHe*)

Net Electric Output 263.59 42.93% 288.51

-- Plant HouseLoads (while on-lhne) i14- .98 +2.44 16.43 Subtotal: Gross Electric.........

Output... ..... ....

278.63 45.38%.. .... ...

304.94 Capacity Losses (departures from full thermal power): 0.68 0.11% 0.74 Ramp Down: 02/01 00 00 - 02:33 (manual scram)

Loadline Adj 02/17 17:00 - 2/18 06:00; 02/18 21:40 - 02/19 00:00 0.28 0.05% 0.31 Ramp up: 02/15 14:02 (on-line) - 02/17 15:00 19.74 3.22% 21.61 Maintain Margin to 1790 Administrative MWth Limit 0.16 0 03% 0.17 Efficiency Losses (which occur even at full thermal power): 0.02 (0.01%) t 0.04

-/+ Seasonal Effects (i.e., cold weather increase) (3.01) (049%) (329)

Subtotal: On-line Losses (Capacity, Efficiency, and Weather): 17.87 2.91% j 19.58 Off-Line, Losses ____375 171%/4 347.48 Total: Target Electric Output. %. # of clnok-hours .014.00 0  % 672.00.

Licensing Action Summary:

Plant Availability: e48.3% 1 Unplanned Auto Scrams (while critical) this month: 0 Number of reportable events: II I Unplanned Auto Scrams (while critical) last 12 months. 0

Text

NM Committed to Nuclear Excellenc, Duane Arnold Energy Center Operated by Nuclear Management Company, LLC March 14, 2003 NG-03-0186 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station 0-P 1-17 Washington, DC 20555-0001

Subject:

Duane Arnold Energy Center Docket No: 50-331 Operating License: DPR-49 February 2003 Monthly Operating Report File: A-118d Please find enclosed the Duane Arnold Energy Center Monthly Operating Report. The report has been prepared in accordance with the guidelines of NRC Generic Letter 97-02: Revised Contents Of The Monthly Operating Report, and distribution has been made in accordance with DAEC Technical Specifications, Section 5.6.4.

Site Vice-President MAP/RBW Enclosures f I C'1-' j,.

SL 3277 DAEC Road 0 Palo, Iowa 52324-9785 Telephone: 319.851.7611

March 14, 2003 NG-03-0186 Page 2 of 2 cc:

Mr. James E. Dyer Ms. Parveen Baig Regional Administrator, Region III Iowa State Utilities Board U.S. Nuclear Regulatory Con-imiissi on Lucas Stafe Offi63-Buildinig 801 Warrenville Road Des Moines, IA 50319 Lisle, IL 60532-4351 Ms. Barbara Lewis Dr. William A. Jacobs, Jr.

McGraw-Hill, Inc. GDS Associates, Inc.

1200 G Street NW, Suite 1100 1850 Parkway Place, Suite 720 Washington, DC 20005 Marietta, GA 30068-8237 Mr. Dennis Murdock Mr. Dale Arends Central Iowa Power Cooperative Com Belt Power Cooperative Box 2517 1300 13th Street North Cedar Rapids, IA 52406 Humboldt, IA 50548 Document Control Desk IRMS INPO Records Center 700 Galleria Parkway NRC Resident Inspector Atlanta, GA 30339-5957 CTS Project Mr.-Darl Hood 1 White Flint North Mail Stop 8H4A 11555 Rockville Pike Rockville, MD 20852

OPERATING DATA REPORT DOCKET NO: 50-331 DATE: 03-14-2003 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 OPERATING STATUS Average Daily Net Power Level

1. Unit Name: Duane Arnold Energy Center 600 ~-

2. Reporting Period: February 2003 500

3. Licensed Thermal Power (MWth): 1912 Tech Spec. Amendment 243 and TSCR for etendedpower ...

uprate was implemented November 7, 2001 Currentoperating -400 thermalpower, as limited by balance-of-plantequipment, is 1790 300

4. Nameplate Rating (Gross MWe DER): 676.425 200 Currentratedoutput, adjustedforas-built balance-of-plant conditions is 614 0 100

5. Design Electrical Rating (Net MWe DER)- 581.4

6. Maximum Dependable Capacity (Gross MWe MDC): 593.1 C- C> )<

7. Maximum Dependable Capacity (Net MWe MDC): 565.5

8. If Changes Occur in Capacity Ratings (Items Number 3 through 7) since the last report, give reasons: N/A

9. Power Level to Which Restricted, If Any (Net MWe): N/A

10. Reasons for Restrictions, If Any: N/A Feb-03 2003 Cumulative Hours in Reporting Period- Feb

-0672.01- -- -1,416 0200C u246e120.0 t 351.5 + 1,095.5 i 195.34 1.3 Hours -Reactor Wasas Critical Number Number of Hours Reactor W Critical 351.5 1.095.5 195.341.3

13. Reactor Reserve Shutdown Hours 0.0 00 192.8

14. Hours Generator On-Line 324.5 1,068.5 191,141.8

15. Unit Reserve Shutdown Hours 00 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 546,642.5 1,866,137.8 280,603,563.9

17. Gross Electrical Energy Generated (MWH) 187,261.0 637,840.0 94,212,652.6 18 Net Electrical Energy Generated (MWH) 177,146.7 603,268.8 88,559,971.1 19 Unit Service Factor 48.3% 75.5% 77.7%

20. Unit Availability Factor 48.0% 75.5% 77.7%

21. Unit Capacity Factor (Using MDC Net) 46.6% 75.3% 70.7%

22. Unit Capacity Factor (Using DER Net) 45.3% 73.3% 68.6%

23. Unit Forced Outage Rate 51.7% 24.5% 8.4%

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO: 50-331 DATE: 03-14-2003 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 MONTH February 2003 Day Average Daily Power Level (MWe-Net) 1 35 2 0 3 0 4 0 5 ..- 0 . . .

6 0 7 0 8 0 9 0 10 0 11 0 12 0 13 0 14 0 15 19 16 289 17 566 18 579 19 589 20 587 21 586 22 589

.23- 590 24 588 25 587 26 587 27 587 28 587

1. N/A #N/A

1. N/A #N/A

1. N/A #N/A

REFUELING INFORMATION DOCKET NO: 50-331 DATE: 03-14-2003 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318

1. Name of facility. Duane Arnold Energy Center

2. Scheduled date for next refueling shutdown. Spring 2003

3. Scheduled date for restart following refueling. Spring 2003

4. Will refueling or resumption of operation thereafter require a technical specification change

-or other-license amendment?-No . .

5. Scheduled date(s) for submitting proposed licensing action and supporting information. N/A

6. Important licensing considerations associated with refueling, e.g., new or different fuel design or supplier, unreviewed design or performance analysis methods, significant changes in fuel design, new operating procedures. N/A

7. Current fuel assemblies inventory Number of Projected date of last Fuel refueling that can be Assemblies discharged (after allowing margin for maintenance of continuous full-core discharge cpity Inreceiving

- ------ for Reload

.......... ........ ....... 18 . . ............

. . 11............. .......................... ---.......---- ...............

............ .................... - - ---- 152

!.n t- !_----------

Installede "m 1*1* o core intoorreactor . . . . . ........ ...........

o......... .11......... . . . . . . . . . . . . .-. ......... ........... ..... ......... .........

...... , ... 33686 .....1 Discharged from core to Spent Fuel Storage Pool 1912 . ..........

.o .............

s..............__

Scheduled for transfer to Dry Fuel Storage November 2003 610 Installed capacity of Spent Fuel Storage Pool 2411 . 2008 Licen_-sed- capacity o'f.Sp ent Fuel Storage Pool (with re-racking) 2829 2014 Licensed capacity of Spent Fuel Storage Pool and Cask Pool (with 3152 reracking)

DOCKET NO. 50-331 DATE: 03-14-2003 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH: February 2003 No. Date Type Duration Reason Method of Licensee Cause (1) (Hours) (2) Shutting Event Down Report #

Reactor (3) 2 - 02/01/2003 F 347.5 A 2 20037-001, -Condenser-tube puncture (369.8 Effective- (Condenser pending due to impact from a full-power hours) tube failed deflector plate puncture) 1- F: Forced - Reason 3 - Method:

S: Scheduled A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Scram C-Refueling 3-Automatic Scram D-Regulatory Restriction 4-Continued E-Operator Training & License Examination 5-Reduced Load F-Administrative 9-Other (Explain)

G-Operational Error (Explain)

H-Other (Explain)

DOCKET NO.: 50-331 DATE: 03-14-2003 Unit: Duane Arnold Enercv Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 Monthly Operational Overview for February 2003 At the beginning of February, a plant shutdown was in progress following leakage of circulating water into the main condenser hotwell through a punctured condenser tube.

At 22:42 on January 31 ", the INFLUENT HIGH CONDUCTIVITY annunciator activated and the Abnormal Operating Procedure for Reactor Water / Condensate High Conductivity was entered at 23:09 when hotwell conductivity reached 0.13 pmho. At 00:18 and 00.19 on February I"t,the CONDENSER HOTWELL HIGH CONDUCTIVITY and RWCU HIGH CONDUCTIVITY annunciators activated. At 00:23 a reduction in Reactor Recirculation System Flow from 45 million lb/hour to 27 million lb/hour was commenced. At 00:54 hotwell conductivity had risen to 10.8 unmho, and an orderly shutdown had commenced. At 02:26, the 'lAl' and 'lA2' essential 4160KV power supplies were transferred from the Auxiliary Transformer to the Startup Transformer. At 02:33, with power at 1000 MWth, a manual scram was initiated.

Reactor coolant chemistry continued to degrade after the manual scram until the main circulating water system was secured at

-1353 and the condensate and feedwater systems were secured at-1356-on February-t-The-plant-was-placedin-Mb-di4,-Cb-od Shutdown, at 1620 on February 1, 2003.

The cause of the tube leak was a puncture due to impact from a failed deflector plate, downstream of 1E-5B Low Pressure Feedwater Heater dump valve CV-1340. The deflector plate broke free inside the condenser following approximately four months of continuous use of CV-1340 (versus the drain valve) for heater level control. The broken plate also dented and scored several other tubes, damaged two sections of the steam baffle plates in the condenser, and bent a third section of the steam baffle plates. The puncture allowed impure water to mix with water going into the reactor resulting in the conductivity increasing. Restoring reactor water quality through temporary water cleaning trucks and storage tanks constituted a significant portion of the forced outage. During the forced outage, DAEC also repaired a drywell cooler leak, which had been increasing, and made some additional preparations and validations for the upcoming March-April outage. An extensive analysis performed to determine the overall impact to the reactor and piping system of the conductivity increase did not identify any long term concerns. (LER 2003-00 1, pending)

Following completion of the repair and restoration of water quality, the plant was taken critical at 11:03 on February 140', and the turbine synchronized to the grid at 14:02 on February 15th. During the outage, the reactor was sub-critical 320.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />, and off-line for 347.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

Following is the allocation of production and losses: Full Power Electrical Capacity Factor Hours Output  % of 614 MWe Equivalent MWe ,.(Yarget Output) (FPHe*)

Net Electric Output 263.59 42.93% 288.51

-- Plant HouseLoads (while on-lhne) i14- .98 +2.44 16.43 Subtotal: Gross Electric.........

Output... ..... ....

278.63 45.38%.. .... ...

304.94 Capacity Losses (departures from full thermal power): 0.68 0.11% 0.74 Ramp Down: 02/01 00 00 - 02:33 (manual scram)

Loadline Adj 02/17 17:00 - 2/18 06:00; 02/18 21:40 - 02/19 00:00 0.28 0.05% 0.31 Ramp up: 02/15 14:02 (on-line) - 02/17 15:00 19.74 3.22% 21.61 Maintain Margin to 1790 Administrative MWth Limit 0.16 0 03% 0.17 Efficiency Losses (which occur even at full thermal power): 0.02 (0.01%) t 0.04

-/+ Seasonal Effects (i.e., cold weather increase) (3.01) (049%) (329)

Subtotal: On-line Losses (Capacity, Efficiency, and Weather): 17.87 2.91% j 19.58 Off-Line, Losses ____375 171%/4 347.48 Total: Target Electric Output. %. # of clnok-hours .014.00 0  % 672.00.

Licensing Action Summary:

Plant Availability: e48.3% 1 Unplanned Auto Scrams (while critical) this month: 0 Number of reportable events: II I Unplanned Auto Scrams (while critical) last 12 months. 0