ML20085L548
| ML20085L548 | |
| Person / Time | |
|---|---|
| Site: | Duane Arnold  |
| Issue date: | 05/31/1995 |
| From: | Denise Wilson, Woodward R IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NF-95-1991, NUDOCS 9506280557 | |
| Download: ML20085L548 (6) | |
Text
,
e Duane Amold Energy Centar l
3277 DAEC Poad a
Palo. IA S2324 Telephone 319 8517EI1 Fax 319 B517611 June 15,1995 UTILITIES Mr. John 11. Martin Regional Administrator Region 111 ILS. Nuclear Regulatory Commission 801 Warrenville 16ad Lisle, IL 60532-4351
Subject:
Duane Arnold Energy Center Docket No: 50-331 Operating License DPR-49 May 1995 Monthly Operating Report
Dear Mr. Martin:
Please find enclosed the Duane Arnold Energy Center Monthly Operating Report for May 1995. 'Ihe report has been prepared in accordance with the guidelines of NUREG0020 and distribution has been made in accordance with DAEC Technical Specifications, Section 6.11.1.c.
Very truly yours David Wilson Plant Superintendent, Nuclear DLW/R11W/cc Enclosures File A-118d CC:
ILS. Nuclear Regulatory Commission Mr. Dennis Murdock Attn: Document Control Desk Centrallowa Power Cooperative Mail Station PI-37 Dox 2517 Washington, DC 20555-0001 (Orig.)
Cedar Rapids,IA 52406 Mr. Glenn Kelly Dr. William A. Jacobs, Jr.
Project Manager GDS Associates,Inc.
1 Whitellint North Suite 720 Mail Stop 13E21 1850 Parkway Place i1555 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 $0548 Mr. Steve Brown DCRC lowa State Utilities Board Lucas State OITice lluilding NRC Resident inspector Des Moines,IA 50319 Mr. I' red Yost Director, Research Services Utility Data Institute 1700 K St. NW, Suite 400 Washington, DC 20006
~
I 9506280557 950531 s
i PDR ADOCK 05000331 PDR An IES Industnes Company r,
'd, OPERATING DATA REPORT DOCKET NO:
50-0331 DATE:
06/15/95 Unit:
Duane Arnold Encrev Center COMPLETED BY:
Richard Woodward TELEPHONE:
(319) 851-7318 OPERATING STATUS 1.
Unit Name: Duane Amold Enervy Center
'** W 'I b 2.
Reporting Period: May 1995 500
. fill!
ll th II I Il ! Hld!I 3.
Licensed Thermal Power (MW ): 1658 400 4.
Nameplate Rating (Gross MW DER): 565.7 (Turbine) e 300 5.
Design Electrical Rating (Net MW DER): 138 3
e 0
6.
Maximum Dependable Capacity (Gross MW MDC): 141 e
7.
Maximum Dependable Capacity (Net MW MDC): 115 e
8.
If Changes Occur in Capacity Ratings (items Number 3 1
6 11 16 21 26 31 through 7) since the last report, Give Reasons: Not Day Annlicable 9.
Power Level to Which Restricted, if Any (Net MWe): Not A_policable 10.
Reasons for Restrictions, If Any: Npt Annlicable May-95 1995 Cummulative i 1.
Hours in Reporting Period 744.0 3,623.0 178,199.0 12.
Number of flours Reactor Was Critical 691.8 2,312.2 133,492.8 13.
Reactor Reserve Shutdown Hours 0.0 0.0 192.8 14.
Hours Generator On-Line 666.2 2,236.8 130,095.9 15.
Unit Reserve Shutdown Hours 0.0 0.0 0.0 16.
Gross Thermal Eriergy Generated (MWH) 1,082,624.2 3,528,402.0 181,056,761.7 17.
Gross Electrical Energy Generated (MWH) 365,485.0 1,195,997.0 60,643,883.5 18.
Net Electrical Energy Generated (MWH) 343,625.3 1,125,660.6 56,865,704.9 19.
Unit Service Factor 89.5 %
61.7 %
73.0 %
20.
Unit Availability Factor
{
89.5 %
61.7 %
73.0 %
21.
Unit Capacity Factor (Using MDC Net) 89.7 %
60.3 %
67.4 %
22.
Unit Capacity Factor (Using DER Net) 85.8 %
57.8 %
64.6 %
23.
Unit Forced Outage Rate 10.5 %
3.4%
11.1 %
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: N/A. (Shutdown Junel. Actual starturn June 6 1995) m
AVERAGE DAILY UNIT POWER LEVEL 3.
DOCKET NO: 50-0331 DATE: 06/15/95 Unit: Duane Amold Encrev Center COMPLETED BY: Richard Woodward TELEPHONE: (3191 851 4 318 MONTH May 1995 Day Average Daily Power I.evel (MWe-Net) 1 536.5 2
536.4 3
534.5 4
533.3 5
533.5 6
-531.0 7
528.1 8
527.1 9
527.3 10 531.9 11 532.3 12 531.9 13 526.7 14 5017 I5 0.0 16 0.0 17 0.0 18 188.6 19 502.7 20 529.8 21 534.0 22 528.2 23 531.9 24 533.1 25 531.1 26 529.4 27 527.4 28 518.8 29 520.0 30 528.8 31 448.2
=
~
REFUELING INFORMATION DOCKET NO: 50-0331 DATE: 06/15/95 Unit: Duane Amold Enercy Center COMPLETED BY: Richard Woodward TELEPHONE: (319) 851-7318 1.
Name of facility.
Duane Arnold Energy Center 2.
Scheduled date for next refueling shutdown.
Refuel Outage XIV to begin September 14,1996.
3.
Actual date for restart following refueling.
Not applicable 4.
Will refueling or resumption of operation thereafter require a technical specification change or other license amendment?
f 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 F
design or supplier, unreviewed design or performance analysis methods, significant changes in fuel design, new operating procedures.
l No 7.
Current and projected fuel assemblies inventory:
Number of Projected date oflast Fuel refueling that can be Assemblies discharged installed in reactor core (following refueling) _
1408 n/a 368 n/a previously discharged from core to Spent Fuel Storage Pool (following refueling) under present physical capacity of Spent Fuel 2411 2007 Storage Pool i
under Licensed Capacity of Spent Fuel Storage Pool 3152 2014 I
1 1
I
DOCKET NO: 50-0331 DATE: 06/15/95 Unit Duane Amold Energy Center COhtPLETED BY: Richan! Woodwani TELEPHONE: (319) 851-7318 UNIT SHU1 DOWNS AND POWER REDUCTIONS REPORT MON 111 May 1995 No Date Type Duration Reason h1cthod of Licensee Event System Comp.
Cause (1)
(Hours)
(2)
Shutting Report #
Code Code Down (4)
(5)
Reactor (3) 4.
05/14/95
'F 77.8 A
3 95-05 SL GR The trip of the 'B' RFP was due to stripping the intemal Feedwater Gear gears.of the coupling between the Reactor Feed Pump Pump shaft and Lube Oil Pump Turbine Lube Oil System 5.
05/31/95 F
0 A
5 N/A-SG TBG rube leak in Low Pressure condenser. Shutdown to drain (reduced Condenser Tubing the waterboxes, identify the leaking tube, and plug it.
power on System (retumed to service 6/6/95 04:35 a.m. - 119.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> off-May 31; line, all in June) shutdown 6/1/95 05:28 a.m).
1 - F: Forced 2 - Reason 3 - h1ethod:
4 - Exhibit G-Instructions for S: Scheduled A-Equipment Failure (Explain) 1-Manual Preparation of Data Entry B-hfaintenance or Test 2-hlanual Scram Sheets for Licensee Event C-Refueling 3-Automatic Scram Report (LER) File (NUREG-D-Regulatory Restriction 4-Continued 0161)
E-OperatorTraining & License Examination 5-Reduced Load F-Administrative 9-Other(Explain) 3 - Exhibit I (Same Source)
G-Operational Error (Explain)
Hother(Explain) 6 e
e 9
v e
c
--,,-p w
7 DOCKET NO.: 50-0331 DATE: 06Z1.5121 Unit: Duane Arnold Energy Center COMPLETED BY: Richard Woodward TELEPHONE: (319)851-7318 Monthly Operational Overview for May 1995:
l On May 1, the Duane Arnold Energy Center was operating at full power, having returned to service twelve days earlier following Refueling Outage Thirteen.
He plant continued full power operation until May 14 at 2258 when the 'B' Reactor Feed Pump (RFP) tripped, causing an automatic scram on low vessel water level. Reactor vessel level recovery was hampered by problems with the 'A' Feedwater Regulator Valve Controller. The turbine subsequently tripped on high reactor water level.
All other systems responded normally. The RFP had tripped on low lube oil pressure, and the cause was determined to be stripping of the internal gears in the coupling between the RFP shaft and lube oil pump.
Following maintenance on the 'B' RFP, the 'A' RFP was inspected to ensure no similar potential problem existed.
The plant returned to service May 18,1995 at 0445 and to full power May 20. (LER 95-05)
During the May 27/29 Memorial holiday weekend, power was decreased at the request of the load dispatcher for lack of grid demand.
After otherwise having operated continuously at full power for ten days, the plant commenced a shutdown May 31 after increases in reactor water sulfates and hotwell conductivity indicated a tube leak in the Low Pressure Condenser. The generator was taken off-line June 1 at 0528. (The plant returned to service June 6 after cleaning the condenser water boxes, identifying the leaking tube, and plugging it.)
Allocation of Production & Losses:
Liectncal Capacity Factor l'ull Power Output
% of 565.7 MWe Equivalent MWe (Design Gross llours Rating)
Actual Metered Net Liectne Output 463.5 81.9%
609.5 Actual Metered Plant Electric Loads 27.8 4.9%
36.5 oft Line 5/14 M 22:58 - 5/18 @ 04:45 59.1 10.5 %
77.8 1
Weather losses, ie.. condenser pressure greater than design) 2.0 0.4%
2.6 Reduced Grid Demand Memorial Day Weekend 5/27-29 0.8 0.1%
l.0 Ramp-up to full Power 5/18 20. Ramp-down 5/31 13.5 2.4%
17.9 (Negative) Efficiency Losses (Mwe output > than base-line thermal conversion)
_LO
-016
-L3
)
Design Gross Electric Output 565.7 Ino n%
7440 l
LicensingAstion summarv:
Plant Availability:
89.5 %
Unplanned Auto Scrams (while/ critical) this month:
1 Number of reportable events:
I Unplanned Auto Scrams (while/ critical)last 12 months:
1
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