NG-99-0682, Monthly Operating Rept for Apr 1999 for Duane Arnold Energy Center.With

Monthly Operating Rept for Apr 1999 for Duane Arnold Energy Center.With

ML20206P847
Person / Time
Site:	Duane Arnold
Issue date:	04/30/1999
From:	Vanmiddlesworth, Woodward R IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	Dyer J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NG-99-0682, NG-99-682, NUDOCS 9905180317
Download: ML20206P847 (6)

Text

L,.

y .

r9 F . A LLI ANT lEs Unime Inc.

UTILITIES

^ "'

IES Utilitics 38[ dab"Io Palo,IA 52324-9785 May 10,1999 orsce: 3i9.85i.76ii Fax: 319.851.7986 www.alliant cnergy.com NG 99-0682 Mr. James E. Dyer Regional Administrator RegionIII U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle,IL 60532-4351

Subject:

Duane Arnold Energy Center Docket No: 50-331 .

Operating License: DPR-49 April 1999 Monthly Operating Report File: A-118d

Dear Mr. Dyer:

Please find enclosed the i>uane Amold Energy Center Monthly Operating Report for April 1999.

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.

Very truly yours, 4<

l Gary VanMiddlesworth A

Plant Manager-Nuclear GDV/RBW Enclosures -- - - - - --- - - -

JM 3

!jO 9905190317 990430 PDR ADOCK 05000331 R PDR ,

p.

g Mr. James E. Dyer NG 99-0682 May 10,1999 Page 2 of 2 cc:

MS. Nuclear Regulatory Commission Ms. Lisa Stump Attn: Document Control Desk lowa State Utilities Board Mail Station 0-PI-17 Lucas State Office Building Washington, DC 20555-0001 (Orig.) Des Moines,IA 50319 Ms. Barbara Lewis Dr. William A. Jacobs, Jr.

._ McGraw-Hill,Inc.

GDS Associates,Inc.

1200 O Street NW, Suite 1100 1850 Parkway Place, Suite 720 Washington, DC 20005 Marietta, GA 30068-8237 Mr. Dennis Murdock Mr. Dale Arends CentralIowa Power Cooperative Corn Belt Power Cooperative Box 2517 130013th Street North Cedar Rapids,IA 52406 Humboldt,IA 50548 Document Control Desk Mr. Al Gutterman INPO Records Center Morgan, Lewis, Bockius 700 Galleria Parkway 1800 M St. N W Atlanta, GA 30339-5957 Washington, DC 20036-5859 Ms. Brenda Mozafari DOCU Project Manager 1 White Flint North NRC Resident inspector Mail Stop 13D18 11555 Rockville Pike CTS Project Rockville, MD 20852 i

AVERAGE DAILY UNIT POWER LEVEL D' DOCKET NO: 50-0331 if DATE: 05/10/99 Unit: Duane Arnold Enercy Center COMPLETED BY: Richard Woodward TELEPHONE: (3191 851-7318 MONTH April 1999 Day Average Daily Power Level (MWe-Net) 1 526.8 2 515.8 3 519.1 4 506.5 5 525.7 6 527.0 7 524.9 8 526.3 9 529.3 l 10 523.3 11 532.7 12 530.2 l 13 528.9 14 527.1 15 529.0 i 16 469.8 l 17 13.8 18 0.0 19 0.0 20 0.0 21 0.0 22 0.0 23 0.0 24 0.0 25 0.0 26 0.0 _. _. . _ .

27 0.0 28 0.0 29 0.0 30 0.0 31 #N/A

4 OPERATING DATA REPORT

)

(

DOCKETNO: 10-0331 DATE: 05/10/99 Unit: Duane Arnold Enerev Center COMPLETED BY: Richard Woodward l l

TELEPHONE: (319) 851-7318 OPERATING STA'IUS

1. Unit Name: Duane Arnold Enercy Center

2. Reporting Period: April 1999 Average Daily Powerlevel

3. Licensed Thermal Power (MWth): 1658 . . . . . .

4. Nameplate Rating (Gross MWe DER): 565.7 (Turbine) - T=ENE8.EEEE

..w._ ,

jt

5. Design Electrical Rating (Net MWe DER):138 300 '

l s n=ama=sanass-

6. Maximum Dependable Capacity (Gross MW e MDC): 112 6 200 -

I .

[gEEgEggEnEg

7. Maximum Dependable Capacity (Net MWe MDC): 12g 100 o EEEEEEEEEEEEE

8. If Changes Occur m. Crpacity Ratings (Items Number 3 through 7) since the last report, Give Reasons: Not 01 08 15 22 29 Annlicable Day ,

9. Power Level to Which Restricted, If Any (Net MW ):e N_%

10. Reasons for Restrictions,if Any:NM A pril-99 1999 Cumulative

11. Hours in Reporting Period 719.0 2,879.0 212,519.0

12. Number of Hours Reactor Was Critical 426.9 2,586.9 164,935.8

13. Reactor Reserve Shutdown Hours 0.0 0.0 192.8

14. Hours Generator On-Line 392.1 2,552.1 161,180.3

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (M WH) 641,558.4 4,184,697.3 231,032,486.6

17. Gross Electrical Energy Generated (MWH)_ _ _ _212,:M3.0 1,416,185.0 .77,476,511.6 l

18. Net Electrical Energy Generated (MWH) 200,879.5 1,3.'7,451.0 72,747,696.5

19. Unit Service Factor 54.5 % 8 b.C'. 75.8 %

20. Unit Availability Factor 54.5 % 88.6 % 75.8 %

21. Unit Capacity Factor (Using MDC Net) 53.7 % 89.3 % 71.9 %

22. Unit Capacity Factor (Using DER Net) 51.9 % 86.3 % 68.9 %

23. Unit Forced Outage Rate 0.0% 0.0% 9.3%

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of each): Refuel, 10/8/99,36 days

25. If Shutdown at End of Report Period, Estimated Date of Startup: N/A

4 REFUELING INFORMATION DOCKET NO: 50-0331 DATE: 05/10/99 Unit: Duane Arnold Enercy Center COMPLETED BY: Richard Woodward TELEPHONE: (3191 851-7318

1. Name of facility. Duane Arnold Enercy Center

2. Scheduled date for next refueling shutdown. October 8.1999

3. Scheduled date for restart following refueling. November 13.1999

4. Will refueling or resumption of operation thereafter require a technical specification change or other license amendment? .Yss - Technical SneciUcation chance to suonort next fuel reload with GE12 fuel desien.

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

Technical Sneci6 cation chance for GE12 fuel storace submitted January 22.1999.

Technical Sneci6 cation chance for GE12 fuel operation is scheduled to be submitted by May 28.

1999.

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. See items 4 & 5 above

7. Current and projected fuel assemblies inventory:

Number of Projected date oflast Fuel refueling that can be discharged Assemblies (after allowing margin for maintenance of continuous full-core discharge capability)

~

Installed in reactor core 368 N/A Previc,usly discharged from core to Spent Fuel Storage Pool 1648 N/A Installed Capacity of Spent Fuel Storage Pool 2411 2001 Licensed Capacity of Spent Fuel Storage Pool (with reracking) 2829 2006 Licensed Capacity of Spent Fuel Storage Pool and Cask Pool (with 3152 2010 reracking)

, DOCKET NO: 50-0331 DATE: 05/10/99 Unit: Duane Arnold Enerev Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 UNIT SIIUTDOWNS AND POWER REDUCTIONS REPORTMONTH: April 1999 No. Date Type Duration Reason Method of Licensee Cause (1) (flours) (2) Shutting Event Down Reactor Report #

(3) 4 04/17/99 S 326.9 B 2 Identify and repair cause of main generator ground fault.

1 - F: Forced 2 - 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)

Il-Other (Explain) 1

)

g DOCKET NO.: 50-0331 DATE: 05/10/99 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 Monthly Operational Overview for April 1999 At the beginning of April the DAEC had continuously operated 102 days.

At 23:55 on April l", an Offgas low flow alarm was received and power was reduced to 95% to maintain condenser vacuum.

The power decrease was halted at 95% at 02:46 (April 2") after the Offgas System stabilized.

On April 9*, from 01:28 until 02:34, power was reduced to 95% to pull control rods to increase load line.

At 17:00 on April 16*, a planned plant shutdown was commenced to investigate and repair the cause of a main generator Geld ground alarm. The plant was taken off-line at 06:23 on April 17*, the reactor taken subcritical at 19:18, and the generator partially disassembled. On April 22d, a copper leaf found broken at the Geld terminal studs proved to be the location of the ground. Following repairs and main generator reassembly, the reactor was taken critical at 23:22 on April 29*, and the generator was synchronized to the grid at 21:18 on April 30* Total time subcritical was 12 days,4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />,4 {

minutes. Total time off-line was 13 days 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br />,55 minutes.

~

~

Allocatien of Production & Losses: Electrical Capacity Factor Full Power

Output  % of 565.7 MWe Equivalent I MWe (Design Rating) llours (FPileq)

Off gas Low flow alarm, CV4108 lost position indication, blown fuse; Reduced power to maintain vacuum: 4/2 00:20 08:00 0.10 0.02 % 0.13

(

Reduced recirculation flow to pull control rods to increase load line (Rod Pull): 4/091:28 - 2:34 0.02 0 00 % 0.03 Power Reduction in Preparation for Shutdown:

4/16 17:00 4/17 06:23 5.67 1.00 % 7.21 Power Ramp-up following Shutdown:

04/30 21:18 05/01 00:00 1.78 0.32 % 2.27 Average Margin to 1658 MWth Limit 0.14 0 03 % 0 18 Subtotal: On-line Capacity Losses 7.72 1.36 % 9.81 1 I l I i

'B' Moisture Separator Reheater Performance Loss 0.65 0.12 % 0.83 Feedwater flow measurement nozzle fouling 1.39 0.25 % 1.76 Other Losses, as yet unidentified 1.49 0 26 % 2.56 Subtotal: On-line Efficiency Losses 3.53 0.62 % 5.15 I I I i I Weather Losses i.e., weather gains (turbine exhaust pressure / condenser inlet temperature > design) 1.15 0.20 % 0.80 I i 1 Total On-line Losses l 12.40 l 2.19 % l 15.76 l

} I i  !

Avg. Net Electric Output (while on-line) 278.77 49.28 % 354.32 Plant Electric Loads (while on-line) 17 31 3 06 % 22.00 Total Electric Generation ---- - - - - - - - -

- 2%.08 -- - 52.34% - 376.32 I I i i i lOff-Line for Generator Ground Repair: 04/17 06:23 - 04/30 21:18 l 257.21 l 45.47 % l 326.92 l 1 I i  !

lI)esign Electric Rating. Total % Total # of clock-hours l 565.70 l 100.00 % l 719.00 l There were no Licensee Event Reports, l.icensing Action Summary:

Plant Availability: 100 % Unplanned Auto Scrams (while/ critical) this month: 0 Number of reportable events: 0 Unplanned Auto Scrams (while/ critical) last 12 months: 0 Main Steam Safety and Relief Valve Challenges: 0

i g DOCKET NO.: 50-0331 DATE: 05/10/99 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 Monthly Operational Overview for April 1999 At the beginning of April the DAEC had continuously operated 102 days.

At 23:55 on April 1", an Offgas low flow alarm was received and power was reduced to 95% to maintain condenser vacuum.

d The power decrease was halted at 95% at 02:46 (April 2 ) after the Offgas System stabilized.

On April 9*, from 01:28 until 02:34, power was reduced to 95% to pull control rods to increase load line.

At 17:00 on April 16*, a planned plant shutdown was commenced to investigate and repair the cause of a main generator field ground alarm. The plant was taken off-line at 06:23 on April 17*, the reactor taken suberitical at 19:18, and the d

generator partially disassembled. On April 22 , a copper leaf found brcken at the field terminal studs proved to be the location of the ground. Following repairs and main generator reassembly, the reactor was taken critical at 23:22 on April 29*, and the generator was synchronized to the grid at 21:18 on April 30*. Total time subcritical was 12 days,4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />,4 minutes. Total time off-line was 13 days 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br />,55 minutes.

~

[ Allocation of Production & Losses: Electrical Capacity Factor Full Power Output  % of 565.7 MWe Equivalent MWe (Design Rating) llours (FPHeq) oft gas Low flow alarm, CV4108 lost position indication, blown fuse; Reduced power to maintain vacuum: 4/2 00:20 08:00 0.10 0.02 % 0.13 Reduced recirculation flow to pull control rods to increase load line (Rod Pull): 4/091:28 - 2:34 0.02 0.00 % 0.03 Power Reduction in Preparation for Shutdown:

4/16 17:00 - 4/17 06:23 5.67 1.00 % 7.21 Power Ramp-up following Shutdown:

04/30 21:18 - 05/01 00:00 1.78 0.32 % 2.27 Average Margin to 1658 MWth Limit 0 14 0 03 % 0.18 l Subtotal: On-line Capacity Losses 7.72 1.36 % 9.81 i l l I i

'B' Moisture Separator Reheater Performance Loss 0.65 0.12% 0.83 Feedwater flow measurement nozzle fouling 1.39 0.25 % 1.76 Other Losses. as yet unidentified 1.49 0.26% 2.56 Subtotal: On-line Efficiency Losses 3.53 0.62 % 5.15 I i i l Weather Losses i.e., weather gains (turbine exhaust pressure / condenser inlet temperature > designl 1.15 0.20 % 0.80 1  ! l Total On-line Losses l 12.40 l 2.19 % l 15.76 l I I I  !

l Avg. Net Electric Output (while on-line) 278.77 49.28 % 354.32 Plant Electric Loads (while on-line) 17 31 3 06 % 22 00

- Total Electric Generation - -- - - _ _ _ - -- -

- 2%.08 - -

52.34 % - - 376.32 j l I I i  !

lOff-Line for Generator Ground Repair: 04/17 06:23 - 04/30 21:18 l 257.21 l 45.47 % l 326.92 l l 6 i l i  !

l Design Electric Rating. Total %. Total # of clock-hours l 565.70 l 100.00 % l 719.00 l There were no Licensee Event Reports.

Licensing Action Summary:

Plant Availability: 100 % Unplanned Auto Scrams (while/ critical) this month: 0 Number ofreportable events: 0 Unplanned Auto Scrams (while/ critical) last 12 months: 0 Main Steam Safety and Relief Valve Challenges: 0