Text

August 2002 Monthly Operating Report for Duane Arnold Energy Center
	ML022670059
Person / Time
Site:	Duane Arnold
Issue date:	09/13/2002
From:	Bjorseth J; Nuclear Management Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	GL-97-002, NG-02-0834
	Download: ML022670059 (8)
	v • d • e

Duane Arnold Energy Center 3277 DAEC Road NMC Committed to NuclearExcellence .F Palo, IA 52324-9785 Operatedby NuclearManagement Company,LLC September 13, 2002 NG-02-0834 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station 0-Pl-17

-Washington, DC 20555-0001

Subject:

Duane Arnold Energy Center Docket No: 50-331 Operating License: DPR-49 August 2002 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.

tuyu 5Ve n D~~ C.%Y Plant Manager-Nuclear JKB/RBW Enclosures

'" ¢" / °UL

September 13, 2002 NG-02-0834 Page 2 of 2 cc:

Mr. James E. Dyer Ms. Lisa Stump Regional Administrator, Region mII Iowa State Utilities Board U.S. Nuclear Regulatory Commission Lucas State Office'iuildifng-.

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 Corn Belt Power Cooperative Box 2517 1300 13th Street North Cedar Rapids, IA 52406 Humboldt, IA 50548 Document Control Desk Mr. Al Gutterman INPO Records Center Morgan Lewis 700 Galleria Parkway 1111 Pennsylvania Avenue, NW Atlanta, GA 30339-5957 Washington, DC 20004

--Mr. Darl Hood ---.. NDOCR I 1 White Flint North NRC Resident Inspector Mail Stop 8H4A 11555 Rockville Pike Rockville, MD 20852 CTS Project

OPERATING DATA REPORT DOCKET NO: 50-331 DATE: 09-13-2002 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 OPERATING STATUS

1. Unit Name: Duane Arnold Energy Center Average Daily Net Power Level

2. Reporting Period: August 2002

3. Licensed Thermal Power (MWth): 1912 700 Tech Spec. Amendment 243 and TSCR for extendedpower uprate iwas implemented November-7, 2001. -Currentoperating thermal power, as limited by balance-of-plantequipment, is 1790

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

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

6. Maximum Dependable Capacity (Gross MWe MDC): 593.1 rI' 0 00

7. Maximum Dependable Capacity (Net MWe MDC): 565.5 00 0 0 0 0

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 Aug-02 2002 Cumulative

11. Hours in Reporting Period 744.0 5,831.0 241,775.0

12. Number of Hours Reactor Was Critical 576.9 -- 5,480.6 -- 191,461 2

13. - Rea--it- Reserve Shutdown Hours 0.0 0.0 192.8

14. Hours Generator On-Line 553.1 5,415.9 187,340.8

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 946,401.9 9,486,023.4 273,984,653.2

17. Gross Electrical Energy Generated (MWH) 317,180.0 3,236,291.0 91,970,508 6

18. Net Electrical Energy Generated (MWH) 299,6764 3,063,404.3 86,439,030.3

19. Unit Service Factor 74.3% 92.9% 77.5%

20. Unit Availability Factor 74.0% 92.9% 77.5%

21. Unit Capacity Factor (Using MDC Net) 71.2% 93.3% 69.7%

22. Unit Capacity Factor (Using DERNet) 69.3% 90.7% 67.3%

23. Unit Forced Outage Rate 0.0% 0.0% 8.3%

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: Startup occurred September 9.

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO: 50-331 DATE: 09-13-2002 Umt: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 MONTH August 2002 Day Average Daily Power Level (MWe -Net) 1 561 2 575 3 565 4 563

-5 _ 562 6 262 7 0 8 0 9 0 10 0 11 0 12 0 13 233 14 556 15 573 16 575 17 578 18 576 19 580 20 577 21 565 22 570 23 -568 24 571 25 571 26 572 27 571 28 572 29 556 30 12 31 0

REFUELING INFORMATION DOCKET NO: 50-331 DATE: 09-13-2002 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 ca ability,)

Installed into reactor core 368 Discharged from core to Spent Fuel Storage Pool 1912 Scheduled for transfer to Dry Fuel Storage November 2003 610 Installed capacity of Spent Fuel Storage Pool 2411 2008 Licensed capacity of Spent Fuel Storage Pool (with re-racking) 2829 2014 Licensed capacity of Spent Fuel Storage Pool and Cask Pool (with 3152 reracking)

DOCKETNO: 50-331 DATE: 09-13-2002 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH: August 2002 No. Date Type Duration Reason Method of Licensee Cause (1) (Hours) (2) Shutting Event Down Reactor Report #

(3) 7 8/06 - 12/2002 F 148.77 B 1 2002-002 Excessive algae (171.36 accumulation caused

_ -.- Effective-Full- - -pITgggin;g-o1RIRSW Power-Hours) strainers, causing both subsystems to be declared inoperable 1 not deferred until the "weekend following discovery of the off abnormal condition" (GL97-02)

The shutdown was in response to unprecedented

" accumulation of marine debris and biological contaminants", i e "not forced" (Unplanned Power Changes > 20%

NEI 99-02 NRC Performance Indicators) 8 08/30 - (end S 42.10 B I Identify and repair of month) (47.53 Effective- source of drywell Full-Power- leakage Hours)

I- 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)

H-Other (Explain)

DOCKET NO.: 50-331 DATE: 09-13-2002 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 Monthly Operational Overview for August 2002 At the beginning of August, the DAEC had continuously operated sixty-eight days.

On August 1 St at 12:29, operators reduced power from 1790 to 1676 MWth after main condenser back pressure increased due to high wet-bulb temperatures while one cooling tower cell was out-of-service. At 16:40, following a drop in ambient temperature, the condenser backpressure decreased, and full power was restored.

On August 4 th and 5td, the "B" and "A" RHRSW (Residual Heat Removal Service Water) subsystems had been declared inoperable due to high strainer differential pressure. The loss of both sub-systems ultimately required a plant shutdown, which occurred with the generator taken off-line August 6 at 16:59 and with insertion of a manual scram at 17:09. The cause of the high strainer differential-pressure was found to be-excessive algae at the intake structure and the RHRSW-and-ESW (Emergency Service Water) wet pits. Analysis of the algae concluded that it was of similar type to that found in the ESW pit in September 2001, however the extent of the accumulation was unprecedented in the 28-year history of the DAEC, and industrial facilities up and down the Cedar River were similarly affected. The wet pits, the pump house stilling basin, the river water supply pits at the intake structure, and the RHRSW strainers were all cleaned and inspected, and the water chemically treated to control the plant growth that could plug the RHRSW strainers. Acceptable pump operation was demonstrated, and an evaluation determined that use of the RHRSW strainer bypass was acceptable. Based on these findings, the RHRSW systems were retroactively determined to have been operable throughout the event. Following the measures taken to ensure RHRSW operability, reactor startup commenced August 110h at 12:47, the reactor was taken critical at 01:04 on August 12"', and the generator synchronized to the grid at 21:45 August 12"h. Full power was achieved August 14"' at 10:33. (LER#2002-002, pending.)

On August 21, during post-maintenance RCIC (Reactor Core Isolation Cooling) system operability testing, following planned repair of RCIC relief valves, a Low Oil Pressure alarm was received immediately upon RCIC start. RCIC was secured, and declared inoperable. Oil was added, and RCIC was then restarted. Upon restart, an oil leak appeared, and RCIC was secured again. It was determined that entrapped air in the lube oil system resulted in the leak. System piping and orifices were inspected, and a vent cap was installed on the outboard turbine bearing housing, but subsequent operation of the RCIC turbine revealed that the lube oil problem still had not been corrected. Troubleshooting continued during the (unrelated) plant shutdown that occurred August 300'. (RCIC narrative continues after next paragraph.)

Drywell coolers had been exhibiting an increasing rate of leakage since August 20g', and on August 29"h at 21:32, an orderly shutdown commenced to perform repairs. On August 30th, the DAEC was taken off-line at 05:57, and a manual scram was inserted at 08.56. At that time, the "unidentified" drywell leakage rate (which includes the drywell coolers) was 1.98 GPM, and identified leak age was 1.52 GPM. (The DAEC Technical Specification Limit fot drywell leakage iý-5 GPM bnidentified, 25 GPM total, and 2 GPM increase within previous 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .) The timing of the shutdown was set to coincide with a window of reduced grid demand during the long holiday weekend. Startup following the repair commenced at 10:59 September 1 st and the reactor was taken critical at 12:35 September 0.

On September 2 at 21:00, continued RCIC lube oil problems required the startup to be terminated without the generator ever having been synchronized to the grid. A manual scram was inserted at 22:05, commencing an unplanned extension of the planned drywell leakage shutdown. This will be further discussed in next month's report. (LER #2002 - 003, pending.)

DOCKET NO.: 50-331 DATE: 09-13-2002 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 Following is the allocation of production and losses: Full Power Electrical Capacity Factor Hours Output % of 614 MWe Equivalent MWe (Target Output) PHeq)

Net Electriic Output 402.78 656% 488.07 Plant House Loads (while on-line) j +,

-23.52 +3.83% 28.51 Subtotal: Gross Electric Output ______________ 426.30 :69.43% 1516.58 Capacity Losses (departures from full thermal power):

Hig condenser back pressure 08/01 12:29 16:40 0.26 0.04% 0.32 CRD Adjustments 08/14 12:25 - 13:20 & 19:05 - 19:55, 08/15 1-04:42 --05-05-&-20-.'45--2T35- 0 04 0.01% 0.05 Unplanned repairs CV 1129 - 1E4A FWH dump 3.00 0.49% 3.63 Ramp-down 08/06 07:53 - 16:59 & 8/29 21:32 - 08/30 05:51

& ramp-up) 08/12 21:45 - 0814 10:33 19.71 3.21% 23.88 Maintain Margin to 1790 Administrative MWth Limit 0.21 0.03% 0.26

!Efficiency Losses (occur even at full thermal power):

'Unidentified (residual) 0.30 0.05% 0.31

-/+ Seasonal Effects ( i.e., hot weather decrease) .6.63 1.08% 8.05 Subtotal: On-line Losses (C ac__y Efficiency, and Weather): 30.15 4.91% 36.50 Off-Line Losses envionmental:'08/06 16:59 08/12 21:45 157.55 25.66% 1 190.92 Ters);t08/30 05:51 Lend of m onth l48.77 (42.10 __.. -rs) 100tal: arget Electr"ic utut. Y2, L of cloc-hur 2A Licensing Action Summary: