ML20072R604

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Monthly Operating Rept for Aug 1994 for Braidwood Nuclear Generating Station
ML20072R604
Person / Time
Site: Braidwood  Constellation icon.png
Issue date: 08/31/1994
From: Kofron K, Pershey C
COMMONWEALTH EDISON CO.
To:
NRC, NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BW-94-0151, BW-94-151, NUDOCS 9409130256
Download: ML20072R604 (10)
v • d • e


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/O Commonwealth Edison Braidwocd Nuclear Power staten f . C1 Route e1, Box 84 g

(, / Braceville, hiinois 60407

. Telephone 815/458-2801 September 8,1994 BW/94-0151 Director Office of Resource Management U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Document Control Desk

Dear Sir:

Enclosed for your information is the Monthly Performance Report covering Braidwood Nuclear Generating Station for the period August 1 through August 31, 1994.

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ron Station Manager Braidwood Nuclear Power Station KLK/CEP/dla Attachments cc: J. B. Martin, U.S.N.R.C., Region Ill R. R. Assa, U.S.N.R.C.

l.D.N.S.

U.S.N.R.C. Resident inspector, Braidwood INPO Records Center D. L. Farrar. Nuclear Regional Service Mgr.

D. M. Saccomando, Nuclear Licensing Admin.

D. R. Eggett, Nuclear Engineering Dept.

K. L. Kaup, Site Vice President, Braidwood NFS, PWR Plant Support P. L. Habel, Unit 1 Operating Engineer J. P. Kuchenbecker, Unit 2 Operating Engineer Nuclear Group, Systems Engineering, Bwd I.D.N.S. Resident inspector, Braidwood

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'"p'e/ , J. M. Bunecicky, Westinghouse D. R. Seavers, A.N.I.

L e 9409130256 940831  ;

FDR ADOCK 05000456 5 r> PDR

. BRAIDWOOD NUCLEAR POWER STATION UNIT 1 AND UNIT 2 MONTHLY PERFORMANCE REPORT Com Ed  ;

NRC DOCKET NO. 050-456, LICENSE NO. NPF - 72 NRC DOCKET NO. 050-457, LICENSE NO. NPF - 77 l

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, A. OPERATING DATA REPORT Docket No: 50 - 456 Unit: Braidwood 1 Date: 9/10/1p94 Completed by: Chris Pershey Telephone: 815-458-2801 OPERATING STATUS

1) Reporting Period: August 1994 Gross Hours: If43,
2) Currently Authorized Power Level (MWt): 3411 Design Electrical Rating (MWo-gross): 1175 Design Electrical Rating (MWe-net): 1120 Max Dependable Capacity (MWegross): 1125 Max Dependable Capacity (MWe-net): 112Q
3) Power level to which restricted (if Any): None
4) Reasons for restrictions (If Any): None This Mo. Yr to Date Cumulath
5) Report Per!od Hours: 744.0 5,831.0 53,384.0 ,
6) Hours Reactor Critical: 631.3 4,071.6 41,669.8 l
7) RX Reserve Shutdown Hours: .0 .0 .0
8) Hours Generator on Une: 618.6 4,011.8 41,036.8
9) Unit Reserve Shutdown Hours: .0 .0 .0
10) Gross Thermal Energy (MWHt): 1,807,795.9 12,643,280.8 127,391,603.7
11) Gross Elect. Energy (MWH): 612,877.0 4,347,373.0 43,161,960.0 j
12) Net Elect. Energy (MWH): 585,215.0 4,163,982.0 41,306,799.0
13) Reactor Sorvice Factor: 84.9 69.8 78.1 ,
14) Reactor Availability Factor: 84.9 69.8 78.1
15) Unit Service Factor: 83.1 68.8 76.9
16) Unit Availability Factor: 83.1 68.8 76.9
17) Unit Capacity Factor (MDC NET): 70.2 63.8 69.1
18) Unit Capacity Factor (DER NET): 70.2 63.8 69.1  !
19) Unit Forced Outage Rate: 16.9 3.0 8.9 -
20) Unit Forced Outage Hours: 125.4 125.4 4030.5 I
21) Shutdown Schedule Over Next 6 Months:

22)If Shutdown at End of Reporting Period, <

Estimated Date of Startup: I I

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, B. AVERAGE DAILY UNIT NET POWER LEVEL LOG Docket No: 50 - 456 Unit: Braidwood 1 Date: 9/10/1394 Completed by: Chris Pershey '

Telephone: 815-458-2801 MONTH: August 1994 Qay MWe-net Qay a MWe-net

1) 1121
  • 16) 250
2) 1120 17) 248
3) 1108 18) 344
4) 1117 19) 128
5) 1127
  • 20) 7
6) 1094 21) 563
7) 1041 22) 1019
8) 1093 23) 1116
9) 1128
  • 24) 1118
10) 1128
  • 25) 1116
11) 485 26) 1118
12) -14 27) 1117
13) 14 28) 1118
14) -15 29) 1121 *
15) 225 30) 1123 *
31) 1122 *
  • Due to condenser efficiency I

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C. UNIT SHUTDOWNSIREDUCTIONS Docket No.: 50 - 456 .

Unit Braidwood 1 Date: 9/10/1994 Completed by: Chris Pershey Telephone: 815-458-2801 REPORT PERIOD: August 1994 LER Cause & Corrective Action No. Date Tvoe Hours Reason Method Number System Component to Prevent Recurrence 18 940811 F 85.8 A 3 94-012 EF ECBD Main SteamEne Isolation caused by a failed GR output transistor on the Safeguards Output JE Driver Board. The defective Safeguards Output Driver Board was replaced and the system was thorough}y tested prior to retuming to service.

19 940819 F 39.G A 1 N/A SI RPD Heater Drain Tank was overfilled during 8/15/94 startup stressing the tank's rupture disc. The rupture disc blew 8/19/94 s he unit was shut down to insta!! a replacems. Operators will be trained on this event.

SUMMARY

"* Unit 1 entered the month of August 1994 with 100% capability. An automatic shutdown occurred 8/11/94 due to a defective electronic circuit board. The unit was manually shutdown on 8/19/94 to replace the Heater Drain Tank rupture disc which failed. The unit operated routinely the remainder of the month.

TYPE REASON MET HOD SYSTEM & COMPONENT F - Forced A - Equipment Failure Maint or Test 1 - Manual S - Scheduled B - Maint or Test 2 - Manual Scram Exhibit F & Instructions for C - RefueEng 3 - Auto Scram Preparation of Data Entry Sheet D - Regulatory Restriction 4 - Continued Licensee Event Report (LER)

E - Operator Training & Ucensee Examination 5 - Reduced Load File (NUREG-0161).

F - Administration G - Operator Error H - Other

D. SAFETY /REUEF VALVE OPERATIONS Docket No.: 50 - 456

  • Unit: Braidwood 1 Date: 9/10/1994 Completed by: Craig Ingold Telephone: 815-458-2801 1

Valves No. & Type Plant Date Actuated Actuation Condition DescriDtion of Event 4 940811 1RY455A 1 - Open signal due Post trip, mode 3 Reactor trip was caused by a spurious 1RY456 to RCS pressure Main Steam isolation signal resulting in transient caused by a post trip RCS pressure rise and reactor trip. PORV actuation.

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A. OPERATING DATA REPORT Docket No: 50 - 457 Unit: Braidwood 2 Date: 9/10/1994 Completed by5 Chris Pershey Telephone: 815-458-2801 OPERATING STATUS

1) Reporting Period: August 1994 Gross Hours: Z44
2) Currently Authorized Power Level (MWt): 3411 Design Electrical Rating (MWe-gross): 1175 Design Electrical Rating (MWe-net): jl20 Max Dependable Capacity (MWe-gross): jlZ5 Max Dependable Capacity (MWe-net): 1120
3) Power level to which restricted (If Any): None
4) Reasons for restrictions (If Any): None This Mo. Yr to Date Cumulative
5) Report Period Hours: 744.0 5,831.0 51,466.0
6) Hours Reactor Critical: 712.1 4,520.7 42,834.8
7) RX Reserve Shutdown Hours: .0 .0 .0
8) Hours Generator on Une: 707.8 4,505.7 42,492.0
9) Unit Reserve Shutdown Hours: .0 .0 .0
10) Gross Thermal Energy (MWHt): 2,263,461.1 13,837,048.9 130,588,707.0 1') Gross Elect. Energy (MWH): 800,981.0 4,771,574.0 43,885,397.0
12) Net Elect. Energy (MWH): 7S9,506.0 4,593,020.0 42,059,603.0
13) Reactor Service Factor: 95.7 77.5 83.2
14) Reactor Availability Factor: 95.7 77.5 83.2
15) Unit Service Factor: 95.1 77.3 82.6 l
16) Unit Availability Factor: 95.1 77.3 82.6
17) Una Capacity Factor (MDC NET): 92.3 70.3 73.0
18) Unit Capacity Factor (DER NET): 92.3 70.3 73.0
19) Unit Forced Outage Rate: 4.9 7.2.7 6.1
20) Unit Forced Outage Hours: 36.2 1325.3 2771.3
21) Shutdown Schedule Over Next 6 Months: 10/8/94
22) If Shutdown at end of Reporting Period, Estimated Date of Startup:

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, B. AVERAGE DAILY UNIT NET POWER LEVEL LOG Docket No: 50 - 457 Unit: Braidwood 2 .

Date: 9/10/1994 Completed by: Chris Pershey Telephone: 815-458-2801 MONTH: August 1994 QaY MWe-net Q.gy MWe-net

1) 1111 16) 1116
2) 823 17) 1113
3) -15 18) 1112
4) 302 19) 1107
5) _753 20) 1106
6) 1123
  • 21) 1119
7) 1123* 22) 1120 v
8) 1123* 23) 1121* ,
9) 1124
  • 24) 1123 *
10) 1123
  • 25) 1121 * ,
11) 1117 26) 1117
12) 1118 27) 1118  ;
13) 1113 28) 1118
14) 1108 29) 1121 *
15) 1121
  • 30) 1123 *
31) 1126 *
  • Due to condenser efficiency .;

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C. UNIT SHUTDOWNSIREDUCTIONS Docket No.: 50 - 457.

Unit: Braidwood 2 Date: 9/10/1994 Completed by: Chris Pershey Telephone: 815-458-2801 REPORT PERIOD: August 1994 LER Cause & Corrective Action

& Date Tvoe Hours Reason Method Number System Component to Prevent Recurrence 27 940802 F 36.2 A 3 94-005 FW Positioner Feedwater regulat%g valve failed closed due to spiral o-ring failure. The positioner was replaced. A replacement positioner is being sought.

SUMMARY

      • Unit 2 entered the month of August 1994 with 100% capability. An automatic trip occurred on 8/2/94 due to an 0-ring failure on a Feedwater Regulating Valve. The valve was repaired and the unit was returned to service. The unit operated routinely the remainder of the month.

TYPE REASON METHOD SYSTEM & COMPONENT F - Forced A - Equipment Failure Maint or Test 1 - Manual S - Scheduled B - Maint or Test 2 - Manual Scram Exhibit F & Instructions for C - Refueling 3 - Auto Scram Preparation of Data Entry Sheet D - Regulatory Restriction 4 - Continued Ucensee Event Report (LER)

E - Operator Training & Licensee Examination 5 - Reduced Load File (NUREG-0161).

F - Administration G - Operator Error H - Other

D. SAFETY REUEF VALVE OPERATIONS Docket No.: 50 - 45 Unit: Braidwood 2 Date: 9/10/1994 Completed by: Kevin Knight Telephone: 815-458-2801 Valves No. & Type Plant Date Actuet.pd Actuation Condition Description of Event None

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