NG-98-0650, Monthly Operating Rept for Mar 1998 for Duane Arnold Energy Center

Monthly Operating Rept for Mar 1998 for Duane Arnold Energy Center

ML20216G559
Person / Time
Site:	Duane Arnold
Issue date:	03/31/1998
From:	Vanmiddlesworth, Woodward R IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	Beach A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
GL-97-02, GL-97-2, NG-98-0650, NG-98-650, NUDOCS 9804200392
Download: ML20216G559 (7)

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Duane Arnold .nergy sentor

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5 3277 DAEC Ft>ad Palo, IA 5232 $

Teoephone 319 8517611 Fan 319 8517986 PRIORITY ROUTING UTILITIES First Second RA RC April 15,1998 .DR A EIC LtRP SGA DRS 01 i NG 98-0650 ONHS PAO l ORMA i Mr. A. Bill Beach / l Regional Administrator FILE ffAu I Region 111 1J.S. Nuclear Regulatory Comrni:;sion 801 Warrenville Road Lisle, IL 60532-4351 1

Subject:

Duane Arnold Energy Center Docket No: 50-331 Operating License: DPR-49 March 1998 Monthly Operating Report File: A-118d I l

Dear Mr. Beach:

Please find enclosed the Duane Arnold Energy Center Monthly Operating Report for )

March 1998. The report has been prepared in accordance with the guidelines of NRC l Generic Letter 97-02: Revised Contents Of The Monthly Operating Report, and distribution has been made in accordance with DAEC Technical Specifications, Section 6.I1.l.c. l 1

Very t ly yours, W

24 a7' Gary VanMiddlesworth Plant Manager-Nuclear GDV/RDW Enclosures 1 9804200392 980331 PDR ADOCK 05000331 R PDR

'APR15 g An IES Industnes Company

Mr. A. Bill Beach NG 98-0650' l April 15,1998 l Page 2 of 2 cc:

l U.S. Nuclear Regulatory Commission Ms. Lisa Stump i

Attn: Document Control Desk lowa State Utilities Board Mail Station PI-37 Lucas State Office Building l Washington, DC 20555-0001 (Orig.) Des Moines,IA 50319 l

Ms. Barbara Lewis Dr. William A. Jacobs, Jr.

l McGraw-liill, Inc. GDS Associates,Inc.

I 1200 G Street NW, Suite 1100 1850 Parkway Place, Suite 720 l

Washington, DC 20005 Marietta, GA 30068-8237

! Mr. Dennis Murdock Mr. Dale Arends

! Central Iowa Power Cooperative Corn Belt Power Cooperative l Box 2517 130013th Street North l Cedar Rapids,IA 52406 Ilumboldt,IA 50548

! Document Control Desk Mr. Al Gutterman j INPO Records Center Morgan, Lewis, Bockius l 700 Galleria Parkway 1800 M St. NW Atlanta, GA 30339-5957 Washington, DC 20036-5859 Mr. Rich Laufer DOCU l Project Manager l 1 Whiteflint M .th NRC Resident Inspector l Mail Stop 13L 21 l 11555 Rockv/t; Pike i Rockville, MD 20852 l

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OPERATING DATA REPORT  !

DOCKET NO: 50-0331 DATE: 04/l5/98

- a Unit: Duane Arnold Enercy Center COMPLETED BY: Richard W*dward TELEPilONE: (319) 851-7318 OPERATING STATUS Average Daily Power Level

1. Unit Name: Duane Arnold Enercy Center 500

2. Reporting Period: March 1998 y 400 Z

3. Licensed Thermal Power (MW j, 300 th ): 1658 6

200

4. Nameplate Rating (Gross MWe DER): 565.7 (Turbing) 100

5. Design Electrical Rating (Net MWe DER): 23_ 3 0 1 6 11 16 21 26 31

6. Maximum Dependable Capacity (Gross MWe MDC): jf5_0, D ay

7. Maximum Dependable Capacity (Net MW, MDC): 220 "

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8. If Changes Occur in Capacity Ratings (items Number 3 through 7) since the last report, Give Reasons: Not Applicable

9. Power Level to Which Restricted,if Any (Net Mw ): e March 16 - 31. decreased from 100% to 94% thermal power

10. Reasons for Restrictions, if Any: End of fuel-cycle 15 coast-down  ;

March-98 1998 Cumulative i 1. flours in Reporting Period 744.0 2,160.0 203,040.0

12. Number ofIlours Reactor Was Critical 744.0 2,160.0 156,926.5 I

13. ReIctor Reserve Shutdown liours 0.0 0.0 192.8

14. flours Generator On Line 744.0 2,160.0 153,309.1 l

15. Unit Reserve Shutdown flours 0.0 0.0 0.0

16. Gross Thennal Energy Generated (MWil) 1,210,552.8 3,542,558.4 218,248,600.6

17. Gross Electrical Energy Generated (MWII) 411,759.0 1,208,205.0 73,200,891.6

18. Net Electrical Energy Generated (MWII) 388,360.7 1,140,377.2 68,711,465.4

19. Unit Service Factor 100.0 % 100.0 % 75.5 %

20. Unit Availability Factor 100.0 % 100.0 % 75.5 %

21. Unit Capacity Factor (Using MDC Net) 100.4 % 101.5 % 71.2 %

22. Unit Capacity Factor (Using DER Net) 97.0 % 98.1% 68.2 %

23 Unit Forced Outage Rate 0.0% 0.0% 9.7%

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of each):

Refueline. April 3.1998 03:55.45 days

25. If Shutdown at End of Report Period, Estimated Date of Startup: May 17,1998

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO: 50-033 J DATE: 04/15/98 Unit: Duane Arnold Energy Center

, . COMPLETED BY: Richard Woodward TELEPHONE: (319)851-7318 MONTH March 1998 Day Average Daily Power Level (MWe-Net) 1 536.7 2 534.9 3 534.9 4 534.6 5 536.8 6 536.6 7 533.6 8 510.0 9 535.3 10 532.8 11 532.4 12 525.3 13 533.8 14 536.9 15 534.0 16 532.4 17 529.8 18 527 9 19 527.8 20 524.2 21 522.8 22 519.6 23 517.0 24 515.8 25 506.0 26 498.9 27 498.0 28 500.1 29 493.0 30 489.1 31 490.9 i

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REFUELING INFORMATION '

DOCKET NO: $0-0331 DATE: 04/15/98 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. April 2.1998 (actual: April 3.1998.03:55)

3. Scheduled date for restart following refueling. hLav 17.1998

4. Will refueling or resumption of operation thereafter require a technical specification change or other license amendment? y.mi RTS 296 proposes fuel discharge as early as 60 hours6.944444e-4 days <br />0.0167 hours <br />9.920635e-5 weeks <br />2.283e-5 months <br /> after shutdown (versus current 120 hour0.00139 days <br />0.0333 hours <br />1.984127e-4 weeks <br />4.566e-5 months <br /> requirem:nt).

RTS 298 proposes reducing restrictions for Standby Liquid Control System Operability requirements. 4 RTS 299 proposes allowing performance of Reactor Vessel flydro without changing reactor mode.

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

RTS 296," Refueling Operations", approved April 2,1997.

RTS 298," Standby Liquid Control Operability Requirements", approved March 31,1998.

RTS 299," Vessel liydrostatic Pressure and Leak Testing Operability Requirements", apprewd March 31, 1998.

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 1 l

7. Current and projected fuel assemblies inventory:

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

Installed in reactor core 168 n/a Fresh fuel to be installed into the core during April 1998 refueling 120 n/a Previously discharged from core to Spent Fuel Storage Pool 1528 n/a Discharged from core to Spent Fuel Storage Pool 1648 n/a following April 1998 refueling_

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)

e DOCKET MO: 50-0331 DATE: 04/15/98

. . Unit: Duane Arnold Enercy Center COMPLETED BY: Richard Woodward q TELEPilONE: (319) 851-7318 '

UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTil: March 1998 (There were no average daily power reductions >20% during the month.)

No. Date Type Duration Reason Method of Licensee Cause f (1) (Hours) (2) Shutting Event Down Reactor Report #

(3) 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 ErTor (Explain) I H-Other (Explain) l l l l

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o DOCKET NO.: $0-0331 l DATE: 04/15/98 l

. , Unit: Duane Arnold Enercy Center I COMPLETED BY: Richard Woodward TELEPIIONE: (319) 851-7318 Monthly Operational Overview for March 1998 The DAEC averaged 97.8% capacity, operating at or near its 1658 MW. full-thermal-power licensed limit, except for the following capacity losses:

e 03/04 01:00 - 05:30, reduced recirculation How to pull control rods and increase load-line (rod pull),0.1 FPil y e

03/07 23:00 - 03/08 03:24, rod-pull, turbine control valve testing, hold at request of load dispatcher,1.0 FP11, e 03/12 01:00 - 13:00, rod-pull,0.6 FPily e 03/1611:00 (end of full-power capability)- 03/3124:00, Cycle 15 coast-down,12.6 FPify At 11:00 on March 16, having fully withdrawn all control rods and operating at full recirculation flow, the reactor reached the end of full power capability for the current fuel cycle. This commenced the end-of-cycle coast-down in thermal power (12.6 FPil y) that would continue until the shutdown for Refuel Outage 15. , .

Despite unseasonably warm (70* - 80') daily peak temperatures March 26 - 31, average weather-related gains in output (seasonal boosts related to lower winter-time condenser inlet temperatures) still accounted for 1.3 FPily of negative losses.

Metering discrepancy (counted as an efGciency loss) and maintenance of margin between actualand license-limitedthermal power (1658 MW ) accounted for the residual remaining 3.1 FPily oflost production. Total losses (netting in the weather-related gains in plant output) equaled 16.1 FPII, out of the available 744 clock-hours during the month.

On April 2 at 14:00, as the plant commenced an orderly shutdown, maximum available reactor power had decreased to 94%.

At 03:55 on April 3, the generator was removed from the grid, and a manual scram was inserted at 05:34. At the end of Cycle 15, the DAEC had continuously operated 201 days, I hour,4 minutes, its sixth longest operational run.

Allocation ofI'roduction & Losses: Liectrical Capacity I actor 1 ull i*ower Output  % of 565.7 MWe Equivalent MWe (Design Rating) llours (FPileq)

Actual Metered Net Electric Output 522.0 92.3% 686.5 Actual Metered Plant I:lectric Loads 31.5 5.6% 41.4 Ofr-l.ine Capacity Losses: 0.0 0.0% 0.0 On-1 ine Unplanned Capacity Losses: 0.0 0.0% 0.0 Normal Capacity Losses (Avg.* Full Power

• MWth < 1658) 0.4 0.1% 0.5 On-l.ine Planned Capacity Losses 13 0.2% 1.7 (neg.) Weather losses - condenser pressure <2.75 In lig / Circ Water Temp < 74.5 *F -1.1 -03% -13 Unplanned Efliciency Losses (Weather Norm-Full-Power MWe > $65.1 Design) 0.0 0.0% 0.C Metering (Avg indicated power MWe Avg metered enero MWile) 2.0 0.4% 2.6 Excluded losses (coast-down, lack of grid demand. etc.) 96 L7% 12 6 Design Gross Electric output 2 12 7440 10( l*]

(There were no Licensee Event Reports.)

Licensine Action Summary:

Plant Availability: 100.0 % Unplanned Auto Scrams (while/ critical) this menth: 0 Number of reportable cents: 0 Unplanned Auto Scrams (while/ critical)last 12 months: 0 Safety Relief Valve Challenges: 0 1

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