ML20096C310

Monthly Operating Rept for Dec 1995 for Duane Arnold Energy Ctr

ML20096C310
Person / Time
Site:	Duane Arnold
Issue date:	12/31/1995
From:	Vanmiddlesworth, Woodward R IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	Miller H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NG-96-002, NG-96-2, NUDOCS 9601170232
Download: ML20096C310 (6)

Text

, Duane Amoto Enzrgy Cemer 3277 C AEC Paad Palo, iA 52324 Telepr: e 319 851 7611 Fax 319 8517611 January 10,1996

" ^'# '

UTILITIES l

Mr. Ilubert J. Miller Regional Administrator l Region ill U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle,IL 60532 4351 l l

Subject:

Duane Arnold Energy Center Docket No: 50-331 Operating License DPR-49 December 1995 Monthly Operating Report j

Dear Mr. Miller:

l Please find enclosed the Duane Amold Energy Center Monthly Operating Report for December 1995. The report has been prepared in accordance with the guidelines of NUREG-0020 and distnbution has been made in accordance with DAEC  ;

l Technical Specifications, Section 6.11.1.c.

Very truly yours, Gary Van Middlesworth l Plant Manager, Nuclear '

GDV/RBW Enclosures File A-Il8d cc:

U.SeNuclear Regulatory Commission Mr. Dennis Murdock I Attn: Document Control Desk Central towa Power Cooperative Mail Station PI-37 Box 2517 Washington, DC 20555-0001 (Orig.) Cedar Rapids, IA 52406 Mr. Glenn Kelly Dr. William A. Jacobs, Jr.

Project Manager GDS Associates,Inc.

I Whitellint North Suite 720 Mail Stop 13E21 1850 Parkway Place 11555 Rockville Pike Marietta, GA 30068-8237 Rockville, MD 20852 Document Control Desk Mr. Dale Arends INPO Records Center Corn Belt Power Cooperative 700 Galleria Parkway 130013th Street North Atlanta. GA 30339-5957 Ilumboldt, IA 50548 Ms. Lisa Stump DOCU lowa State Utilities Board Lucas State Office Building NRC Resident inspector Des Moines, IA 50319 Mr. Fred Yost Ms. Kathleen Shea Director, Research Services Utility Data institute Morgan, Lewis, Bochius 1800 M St. NW / /

• 1700 K St. NW, Suite 400 WaAington, DC 20036-5859 j Washington, DC 20006 g

{

9601170232 951231 (

PDR ADOCK 05000331 R PDR An IES Industnes Company

I, ..

2 OPERATING DATA REPORT i I. DOCKET NO: 50-0311

DATE

01/10/96 i Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward l TELEPHONE: (3191851-7318 4

OPERATING STATUS

! Average Daily Power Level l I

1. Unit Name: Duane Arnold Energy Center 500

2. Reporting Period: December 1995

] l i

i

3. Licensed Thermal Power (MW th );Ifi18 lj I

i , 300 400

4. Nameplate Rating (Gross MWe DER): 565.7 (Turbine) j 5. Design Electrical Rating (Net MWe DER): 118 100 j 6. Maximum Dependable Capacity (Gross MWe MDC): 141 , 0 l 1 6 11 16 21 26 31

! 7. Maximum Dependable Capacity (Net MW e MDC):ill i 2 Day l

! 8. If Changes Occur in Capacity Ratings (Items Number 3 through

7) since the last report, Give Reasons: Mal Aeolicable

]

i 1

9. Power Level to Which Restricted, If Any (Net MWe ): Not Applicable i

j 10. Reasons for Restrictions, If Any: Not Anolicable k

December-95 1995 Cummulative

11. Hours in Reporting Period 744.0 8,760.0 183,336.0

12. Nu.mber of Hours Reactor Was Critical 744.0 7,345.2 138,525.8

13. Reactor Reserve Shutdown Hours 0.0 0.0 192.8

14. Hours Generator On-Line 744.0 7,254.7 135,113.8

~

l5. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 1,211,082.4 11,732,854.7 189,261,214.4

17. Gross Electrical Energy Generated (MWH) 414,352.0 3,964,084,1 63,411,970.6 I8. Net Electrical Energy Generated (MWH) 391,321.6 3,736,970.3 59,477,014.6

19. Unit Service Factor 100.0 % 82.8 % 73.7 %

20. Unit Availability Factor 100.0 % 82.8 % 73.7 %

21. Unit Capacity Factor (Using MDC Net) 102.1 % 82.8 % 68.5 %

22. Unit Capacity Factor (Using DER Net) 97.8 % 79.3 % 65.6 %

23. Unit Forced Outage Rate 0.0% 1.1% 10.8 %

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

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

AVERAGE DAILY UNIT POWER LEVEL , , j DOCKET NO: 50-0331

• \ i DATE: 01/10/96 - - l Unit: Duane Arnold Energy Center I COMPLETED BY: Richard Woodward TELEPHONE: (3191851-7318 MONTH December 1995 Day Avemge Daily PowerLevel (MWe-Net) 1 534.2 2 529.2 3 245.3 4 504.4 5 534.0 6 531.9 7 539.4 8 534.9 9 534.9 10 529.2 11 531.1 12 533.0 13 534.5 14 535.3 15 535.9 16 537.4 17 537.7 l 18 537.7 19 541.1 20 535.7 21 537.8 22 540.0 23 537.5 24 538.2 25 539.9 26 534.6 27 543.2 28 539.3 29 541.3 30 538.7 31 537.9 l i

l I

1

. REFUELING INFORMATION

), '

DOCKET NO: 50-0331 DATE: 01/10/96 Unit: Duane Arnold Enerev Center  !

COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318

1. Name of facility.

1 Duane Arnold Energy Center 2_ Scheduled date for next refueling shutdown.

Refuel Outage XIV to begin October 10,1996. l

3. Actual date for restart following refueling.

November 14,1996

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. )

Not applicable

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.

No J

7. Current and projected fuel assemblies inventory:

! Number of Projected date oflast l Fuel refueling that can be j Assemblies discharged installed in reactor core (following refueling)  ! 368 i n/a previously discharged from core to Spent Fuel 1408 n/a Storage Pool (following refueling) under present physical capacity of Spent Fuel 2411 2007 Storage Pool under Licensed Capacity of Spent Fuel Storage Pool I 3152 2014

DOCKET NO: 50-0331 DATE: 01/10/96 Unit: Duane Amold Energy Center COMPLETED BY: Richard Woodward TELEPilONE: (319) 851-7318 UNIT SilUTDOWNS AND POWER REDUCTIONS REPORT MONTil: December 1995 No. Date Type Duration Reason Method of Licensee Event System Code Comp. Code Cause (1) (llours) (2) Shutting Report # (4) (5)

Down Reactor (3) 8 Dec. 2-4 S 0 B 5 n/a SJ PDCV To replace the 'B' Feedwater Regulating Valve Actuator, to (14 full feedwater Valve, repair a steam leak on one of the MSR Drain Tank power System Control, instrument isolation valves, to stop additional leaks into the hours Differential, turbine building equipment drain sump, to perform turbine <

equivalent) Pressure control valve testing and to perform a control rod sequence exchange.

1 - F: Forced 2 - Reason 3 - Method: 4 - Exhibit G- Instmctions for S: Scheduled A-Equipment Failure (Explain) 1-Manual Preparation of Data Entry B-Maintenance or Test 2-Manual Scram Sheets for Licensee Event C-Refueling 3-Automatic Scram Repon (LER) File (NUREG-D-Regulatory Restriction 4-Continued 0161)

E-Operator Training & License Examination 5-Reduced Load F-Administrative 9-Other (Explain) 5 - Exhibit I (Same Source) i G-Operational Error (Explain)

II-Other(Explain)

- e l

m O

h

1 s

• Ih

+ '

• DOCKET NO.: 50-0331 DATE: 01/10'96 i Unit: Duane Arnold Enerev Center l COMPLETED BY: Richard Woodward l TELEPHONE: (319)851-7318 l l

Monthly Operational Overview for December 1995:

1 The DAEC operated at full thermal power throughout the month except December 2-4 to: I e replace the 'B' Feedwater Regulating Valve Actuator l

• repair a steam leak on one of the MSR Drain Tank instrument isolation valves l l

• stop additional leaks into the turbine building equipment drain sump

• perform scheduled turbine control valve surveillance testing a perform control rod sequence exchange.

Forgone production was 14.1 full-power-equivalent-hours.

Allocation of Production & Losses; tiectrical Lapacity t actor t ull Power j Output  % of $65.7 MWe Equivalem MWe (Design Gross Hours l

Rating)

Actual Metered het Electnc Uutput 526.0 93.0 % 691.7 Actual Metered Plant Electne loads 3 l.0 5.7% 40.7 Load following 0.0 0.0% 0.0 Off-Line 0.0 0.0% 0.0

(-) Weather losses, ie., condenser pressure <. 2.75 In Hg i Circ Water Iemp <. 74.5 F -5.9 l.0% -7.8 Planned Capacity Losses: Turbine Control Valve Testing, feed Reg valve repair 12/2 10.7 1.9% 14.1 Control Rod Drive Exercises 0.0 0.0% 0.0 Unplanned Capacity Loss; 0.0 0.0% 0.0 Normal Capacity Losses ( Avg MWth < 1658) 0.2 0.0% 0.3 l Metering Losses (Avg indic MWe Avg MWHe) 2.4 0.4% 3.2 l Efliciency Losses (Weather-Norm-Full-Power-MWe < 565.7) M 112h M Design Gross Liectric Output 565.7 100.0 % 744.0 At the end of December, the DAEC had operated continuously for 208 consecutive days, its fifth longest operating run.

DAEC's end-of year capability factor was 80.4%, its best ever for a refuel-outage-year. The three-year average 1992-95 capability factor is 81%. Unplanned Capability Losses for 1995 were 3.2%. The three-year average is 3.8%.

On December 12, during the performance of the "High Pressure Coolant injection System (HPCI) Quarterly Ope ability j Test", HPCI pump flow dropped unexpectedly and the "LO FLOW" alarm was received. At that time the HPCI turbine was tripped by the operator and the system declared inoperable. Extensive troubleshooting failed to conclusively determine a cause for the event. Following a temporary modification to lower the overall contact resistance of a low-current / low-voltage turbine control system relay, the test was successfully completed on December 15. Monitoring equipment was installed on i the HPCI control system and a schedule ofincreased operability testing (every ten days) was initiated. The HPCI turbine has l since been operated three times, with no recurrance of the problem. The event had no effect on the safe operation of the l plant. (LER # 95-12).

l On December 21 water was found in the HPCI turbine exhaust line. The source of the water was unknown, and its effect on HPCI operability was also unknown. HPCI was therefore conservatively declared inoperable. The exhaust line was drained and a preliminary determination, based on engineeringjudgment, concluded that HPCI was operable. It was declared operable December 22. Futther investigations are in progress. (LER # 95-13, pending).

Licensine Action Summarv:

Plant Availability: 100.0 % Unplanned Auto Scrams (while/ critical) this month: 0 Number of reportable events: 2 Unplanned Auto Scrams (while/ critical) last 12 months: 1