Text

Monthly Operating Reports Second Quarter 2008
	ML082190013
Person / Time
Site:	Beaver Valley, Millstone, Hatch, Monticello, Calvert Cliffs, Dresden, Davis Besse, Peach Bottom, Browns Ferry, Salem, Oconee, Mcguire, Nine Mile Point, Palisades, Palo Verde, Perry, Indian Point, Fermi, Kewaunee, Catawba, Harris, Wolf Creek, Saint Lucie, Point Beach, Oyster Creek, Watts Bar, Hope Creek, Grand Gulf, Cooper, Sequoyah, Byron, Pilgrim, Arkansas Nuclear, Three Mile Island, Braidwood, Susquehanna, Summer, Prairie Island, Columbia, Seabrook, Brunswick, Surry, Limerick, North Anna, Turkey Point, River Bend, Vermont Yankee, Crystal River, Ginna, Diablo Canyon, Vogtle, Waterford, Duane Arnold, Farley, Robinson, Clinton, South Texas, San Onofre, Cook, Comanche Peak, Quad Cities, Fort Calhoun, FitzPatrick, McGuire, LaSalle
Issue date:	08/07/2008
From:	; NRC/NRR/ADRO/DIRS/IPAB
To:	;
	Masciantonio A, NRR/DIRS, 415-1290
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ml082190002	List: ML082190013;
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	Download: ML082190013 (312)
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OPERATING DATA REPORT DOCKET: 313 PREPARER NAME: Steven L. Coffman UNIT_NME: ANO Unit 1 PREPARER TELEPHONE: 479-858-5560 RPT_PERIOD: 200804

1. Design Electrical Rating: 850

2. Maximum Dependable Capacity (MWe-Net) 836 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 235,383.61

4. Number of Hours Generator On-line 720.00 2,903.00 232,427.53

5. Reserve Shutdown Hours 0.00 0.00 817.50

6. Net Electrical energy Generated (MWHrs) 611,739.00 2,224,401.00 181,776,868.24 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Unit began the month at, or near full power. On 04/20/08, power was reduced to ~40% to take a Main Feedwater Pump off line. The Unit returned to full power the next day and operated the remainder of the month at, or near full power.

OPERATING DATA REPORT DOCKET: 313 PREPARER NAME: Steven L. Coffman UNIT_NME: ANO Unit 1 PREPARER TELEPHONE: 479-858-5560 RPT_PERIOD: 200805

1. Design Electrical Rating: 850

2. Maximum Dependable Capacity (MWe-Net) 836 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 236,127.61

4. Number of Hours Generator On-line 744.00 3,647.00 233,171.53

5. Reserve Shutdown Hours 0.00 0.00 817.50

6. Net Electrical energy Generated (MWHrs) 611,473.00 2,835,874.00 182,388,341.24 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Unit began the month at, or near full power. On 05/02/08, the System Dispatcher directed a power reduction to ~87% due to grid instability.

On 05/07/08, the Unit returned to near full power. On 05/16/08, the System Dispatcher directed a power reduction to ~60% due to the loss of a 500 KV line. The Unit returned to near full power on 05/18/08. On 05/24/08, the System Dispatcher directed a power reduction to ~50% due to the loss of a 500 KV line. The Unit returned to near full power on 05/25/08, and operated the remainder of the month at, or near full power.

OPERATING DATA REPORT DOCKET: 313 PREPARER NAME: Steven L. Coffman UNIT_NME: ANO Unit 1 PREPARER TELEPHONE: 479-858-5560 RPT_PERIOD: 200806

1. Design Electrical Rating: 850

2. Maximum Dependable Capacity (MWe-Net) 836 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 236,847.61

4. Number of Hours Generator On-line 720.00 4,367.00 233,891.53

5. Reserve Shutdown Hours 0.00 0.00 817.50

6. Net Electrical energy Generated (MWHrs) 610,763.00 3,446,637.00 182,999,104.24 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Unit operated the entire month at, or near full power.

OPERATING DATA REPORT DOCKET: 368 PREPARER NAME: Steven L. Coffman UNIT_NME: ANO Unit 2 PREPARER TELEPHONE: 479-858-5560 RPT_PERIOD: 200804

1. Design Electrical Rating: 1032

2. Maximum Dependable Capacity (MWe-Net) 988 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 489.32 2,297.22 205,378.10

4. Number of Hours Generator On-line 478.67 2,286.57 202,714.01

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 445,028.00 2,186,146.00 179,261,157.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008- 3/16/2008 S 239.78 C 4 2R19 Refueling Outage 01 2008- 4/11/2008 F 0.65 A 5 Manually tripped the MTG for #1 Control Valve 03 wiring repair. The Reactor remained critical.

2008- 4/11/2008 S 0.90 B 5 Tripped Main Turbine for Overspeed Trip Testing.

02 The Reactor remained critical.

SUMMARY

The Unit began the month continuing the 19th refueling outage. On 04/10/08 the Unit was tied to the grid. On 4/11/08, the Main Turbine was taken off line for overspeed trip testing, then re-tied to the grid. On 4/11/08, the Main Turbine was manually taken off line to make wiring repairs to the #1 Control Valve, then tied back to the grid that same day. The Unit achieved full power on 04/14/08 and operated the remainder of the month at, or near full power.

OPERATING DATA REPORT DOCKET: 368 PREPARER NAME: Steven L. Coffman UNIT_NME: ANO Unit 2 PREPARER TELEPHONE: 479-858-5560 RPT_PERIOD: 200805

1. Design Electrical Rating: 1032

2. Maximum Dependable Capacity (MWe-Net) 988 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,041.22 206,122.10

4. Number of Hours Generator On-line 744.00 3,030.57 203,458.01

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 747,647.00 2,933,793.00 180,008,804.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Unit began the month at, or near full power. On 05/24/08, the System Dispatcher directed a power reduction to ~95% due to the loss of a 500 KV line. The Unit returned to full power that same day, and operated the remainder of the month at, or near full power.

OPERATING DATA REPORT DOCKET: 368 PREPARER NAME: Steven L. Coffman UNIT_NME: ANO Unit 2 PREPARER TELEPHONE: 479-858-5560 RPT_PERIOD: 200806

1. Design Electrical Rating: 1032

2. Maximum Dependable Capacity (MWe-Net) 988 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,761.22 206,842.10

4. Number of Hours Generator On-line 720.00 3,750.57 204,178.01

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 719,892.00 3,653,685.00 180,728,696.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Unit operated the entire month at, or near full power.

OPERATING DATA REPORT DOCKET: 334 PREPARER NAME: Glenn Mitchell UNIT_NME: Beaver Valley Unit 1 PREPARER TELEPHONE: 330-384-5027 RPT_PERIOD: 200804

1. Design Electrical Rating: 911

2. Maximum Dependable Capacity (MWe-Net) 892 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 202,895.56

4. Number of Hours Generator On-line 720.00 2,903.00 200,273.43

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 655,921.00 2,611,202.00 154,144,111.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at full power for the month except for a planned derate to 97% power for Turbine Valve testing.

OPERATING DATA REPORT DOCKET: 334 PREPARER NAME: Glenn Mitchell UNIT_NME: Beaver Valley Unit 1 PREPARER TELEPHONE: 330-384-5027 RPT_PERIOD: 200805

1. Design Electrical Rating: 911

2. Maximum Dependable Capacity (MWe-Net) 892 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 203,639.56

4. Number of Hours Generator On-line 744.00 3,647.00 201,017.43

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 677,204.00 3,288,406.00 154,821,315.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at full power for the entire month of May.

OPERATING DATA REPORT DOCKET: 334 PREPARER NAME: Lawrence Criscione UNIT_NME: Beaver Valley Unit 1 PREPARER TELEPHONE: 330-384-4693 RPT_PERIOD: 200806

1. Design Electrical Rating: 911

2. Maximum Dependable Capacity (MWe-Net) 892 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 204,359.56

4. Number of Hours Generator On-line 720.00 4,367.00 201,737.43

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 647,844.20 3,936,250.20 155,469,159.70 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at full power for the month of June.

OPERATING DATA REPORT DOCKET: 412 PREPARER NAME: Glenn Mitchell UNIT_NME: Beaver Valley Unit 2 PREPARER TELEPHONE: 330-384-5027 RPT_PERIOD: 200804

1. Design Electrical Rating: 868

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 312.12 2,495.12 153,524.18

4. Number of Hours Generator On-line 312.02 2,495.02 152,746.14

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 255,348.00 2,153,624.00 121,760,598.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 4/14/2008 S 407.98 C 1 13th Refueling Outage. No issues on shutdown.

SUMMARY

The unit reduced power in preparation for its 13th refueling outage commencing the planned outage on 4/14/08 at 00:01.

OPERATING DATA REPORT DOCKET: 412 PREPARER NAME: Glenn Mitchell UNIT_NME: Beaver Valley Unit 2 PREPARER TELEPHONE: 330-384-5027 RPT_PERIOD: 200805

1. Design Electrical Rating: 868

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 250.62 2,745.74 153,774.80

4. Number of Hours Generator On-line 198.62 2,693.64 152,944.76

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 115,297.00 2,268,921.00 121,875,895.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 4/14/2008 S 527.95 C 4 13th Refueling Outage. No issues on shutdown.

2 5/24/2008 F 17.43 A 5 Turbine Control system electronic card failure required the turbine to be removed from service for replacement (reactor remained critical).

SUMMARY

The unit went critical on 5/15/08 at 08:12 and commenced turbine roll. At 500 RPM, there were indications of high temperatures on the HP turbine bearing number 2. The unit was shutdown and the bearing was replaced. The unit again went critical on 5/22/08 at 16:31 and the generator was synched to the grid at 23:57. The turbine was removed from the grid on 5/24/08 at 04:00 to replace a turbine control valve electronic circuit card.

On 5/24/08 at 21:26, the generator was connected to the grid and reactor power was increased. Power was held at various times to tune the feedwater reg valves that were worked this outage to support power uprate. 95.5% power (previous 100% level) was reached on 5/29/08.

OPERATING DATA REPORT DOCKET: 412 PREPARER NAME: Lawrence Criscione UNIT_NME: Beaver Valley Unit 2 PREPARER TELEPHONE: 330-384-4693 RPT_PERIOD: 200806

1. Design Electrical Rating: 868

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,465.74 154,494.80

4. Number of Hours Generator On-line 720.00 3,413.64 153,664.76

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 636,425.00 2,905,346.00 122,512,320.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at full power for the month of June.

OPERATING DATA REPORT DOCKET: 456 PREPARER NAME: Hildebrant UNIT_NME: Braidwood Unit 1 PREPARER TELEPHONE: 815/417-2173 RPT_PERIOD: 200804

1. Design Electrical Rating: 1187

2. Maximum Dependable Capacity (MWe-Net) 1156 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 151,237.04

4. Number of Hours Generator On-line 720.00 2,903.00 150,211.50

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 867,480.00 3,445,380.00 166,194,347.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 Operated normally at full load for the entire month.

OPERATING DATA REPORT DOCKET: 456 PREPARER NAME: Hildebrant UNIT_NME: Braidwood Unit 1 PREPARER TELEPHONE: 815/417-2173 RPT_PERIOD: 200805

1. Design Electrical Rating: 1187

2. Maximum Dependable Capacity (MWe-Net) 1156 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 151,981.04

4. Number of Hours Generator On-line 744.00 3,647.00 150,955.50

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 894,521.00 4,339,901.00 167,088,868.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 Operated normally at full load for the entire month.

OPERATING DATA REPORT DOCKET: 456 PREPARER NAME: Hildebrant UNIT_NME: Braidwood Unit 1 PREPARER TELEPHONE: 815/417-2173 RPT_PERIOD: 200806

1. Design Electrical Rating: 1187

2. Maximum Dependable Capacity (MWe-Net) 1156 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 152,701.04

4. Number of Hours Generator On-line 720.00 4,367.00 151,675.50

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 853,721.00 5,193,622.00 167,942,589.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 Operated normally at full load for the entire month.

OPERATING DATA REPORT DOCKET: 457 PREPARER NAME: Hildebrant UNIT_NME: Braidwood Unit 2 PREPARER TELEPHONE: 815/417-2173 RPT_PERIOD: 200804

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1131 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 479.00 2,662.00 155,236.00

4. Number of Hours Generator On-line 479.00 2,662.00 154,487.85

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 537,877.00 3,077,686.00 169,692,638.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments A2R13 4/20/2008 S 241.00 C 1 On 04/20/2008 at 23:00 Unit 1 was removed from service and entered A2R13 Refeuling Outage.

Unit 2 reactor was taken critical by boron dilution on 05/16/08 at 1523. Initial physics testing was completed and reactor power raised to greater than 5% to enter mode 1 on 05/162008 at 2044.

Generator synchronization to the grid occurred on 05/17/2008 at 0545 to end A2R13.

SUMMARY

Unit 2 Operated normally for the entire month. On 04/04/2008 the Unit began a fuel depletion coastdown and enter A2R13 Refeuling Outage on 04/20/2008 23:00.

OPERATING DATA REPORT DOCKET: 457 PREPARER NAME: Hildebrant UNIT_NME: Braidwood Unit 2 PREPARER TELEPHONE: 815/417-2173 RPT_PERIOD: 200805

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1131 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 368.62 3,030.62 155,604.62

4. Number of Hours Generator On-line 354.25 3,016.25 154,842.10

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 359,778.00 3,437,464.00 170,052,416.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments A2R13 4/20/2008 S 389.75 C 4 On 04/20/2008 at 23:00 Unit 1 was removed from service and entered A2R13 Refeuling Outage.

Unit 2 reactor was taken critical by boron dilution on 05/16/08 at 1523. Initial physics testing was completed and reactor power raised to greater than 5% to enter mode 1 on 05/162008 at 2044.

Generator synchronization to the grid occurred on 05/17/2008 at 0545 to end A2R13.

SUMMARY

Unit 2 Completed A2R13 Refuling Outage on 05/17/2008 and following power ascension operated normally at full load for the remainder of the month. During A2R13 problems with the fuel assembly handling tool occurred and resulted in outage extension losses of approximately 2.3 days.

OPERATING DATA REPORT DOCKET: 457 PREPARER NAME: Hildebrant UNIT_NME: Braidwood Unit 2 PREPARER TELEPHONE: 815/417-2173 RPT_PERIOD: 200806

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1131 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,750.62 156,324.62

4. Number of Hours Generator On-line 720.00 3,736.25 155,562.10

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 831,137.00 4,268,601.00 170,883,553.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 Operated normally at full load for the entire month.

OPERATING DATA REPORT DOCKET: 259 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 1 PREPARER TELEPHONE: 256-729-7447 RPT_PERIOD: 200804

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1079 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 67,212.39

4. Number of Hours Generator On-line 720.00 2,903.00 65,625.12

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 772,102.33 3,168,346.01 61,472,907.41 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 259 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 1 PREPARER TELEPHONE: 256-729-7447 RPT_PERIOD: 200805

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1079 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 67,956.39

4. Number of Hours Generator On-line 744.00 3,647.00 66,369.12

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 788,179.30 3,956,525.31 62,261,086.71 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 259 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 1 PREPARER TELEPHONE: 256-729-7447 RPT_PERIOD: 200806

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1079 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 68,676.39

4. Number of Hours Generator On-line 720.00 4,367.00 67,089.12

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 763,820.00 4,720,345.31 63,024,906.71 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 260 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 2 PREPARER TELEPHONE: 256-729-7447 RPT_PERIOD: 200804

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1104 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 191,796.43

4. Number of Hours Generator On-line 720.00 2,903.00 188,918.84

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 807,680.33 3,273,379.88 192,222,764.17 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 260 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 2 PREPARER TELEPHONE: 256/729/7447 RPT_PERIOD: 200805

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1104 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 192,540.43

4. Number of Hours Generator On-line 744.00 3,647.00 189,662.84

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 827,682.00 4,101,061.88 193,050,446.17 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 260 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 2 PREPARER TELEPHONE: 256-729-7447 RPT_PERIOD: 200806

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1104 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 193,260.43

4. Number of Hours Generator On-line 720.00 4,367.00 190,382.84

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 772,732.00 4,873,793.88 193,823,178.17 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 296 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 3 PREPARER TELEPHONE: 256-729-7447 RPT_PERIOD: 200804

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1105 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 0.00 1,458.90 148,089.97

4. Number of Hours Generator On-line 0.00 1,361.55 146,385.06

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.00 1,414,693.74 152,303,732.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 3/18/2008 S 720.00 C 4 Unit 3 Cycle 13

SUMMARY

OPERATING DATA REPORT DOCKET: 296 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 3 PREPARER TELEPHONE: 256-729-7447 RPT_PERIOD: 200805

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1105 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 404.90 1,863.80 148,494.87

4. Number of Hours Generator On-line 345.40 1,706.95 146,730.46

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 339,153.07 1,753,846.81 152,642,885.67 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 3/18/2008 S 398.60 C 4 Unit 3 Cycle 13

SUMMARY

OPERATING DATA REPORT DOCKET: 296 PREPARER NAME: Kathy C. Hollander UNIT_NME: Browns Ferry Unit 3 PREPARER TELEPHONE: 256-729-7447 RPT_PERIOD: 200806

1. Design Electrical Rating: 1120

2. Maximum Dependable Capacity (MWe-Net) 1105 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,583.80 149,214.87

4. Number of Hours Generator On-line 720.00 2,426.95 147,450.46

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 789,755.00 2,543,601.81 153,432,640.67 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 325 PREPARER NAME: Chris Mills UNIT_NME: Brunswick Unit 1 PREPARER TELEPHONE: 910-457-2567 RPT_PERIOD: 200804

1. Design Electrical Rating: 983

2. Maximum Dependable Capacity (MWe-Net) 938 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 68.62 1,846.57 203,756.54

4. Number of Hours Generator On-line 33.42 1,810.10 198,931.93

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 7,406.00 1,657,381.00 155,327,765.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments B117R 3/15/2008 S 686.58 C 4 Planned B117R1 refuel outage.

1

SUMMARY

Unit 1 was shutdown for planned refueling outage beginning March 15 and continued into April.

OPERATING DATA REPORT DOCKET: 325 PREPARER NAME: Chris Mills UNIT_NME: Brunswick Unit 1 PREPARER TELEPHONE: 910-457-2567 RPT_PERIOD: 200805

1. Design Electrical Rating: 983

2. Maximum Dependable Capacity (MWe-Net) 938 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,590.57 204,500.54

4. Number of Hours Generator On-line 744.00 2,554.10 199,675.93

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 704,958.00 2,362,339.00 156,032,723.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 325 PREPARER NAME: Chris Mills UNIT_NME: Brunswick Unit 1 PREPARER TELEPHONE: 910-457-2567 RPT_PERIOD: 200806

1. Design Electrical Rating: 983

2. Maximum Dependable Capacity (MWe-Net) 938 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,310.57 205,220.54

4. Number of Hours Generator On-line 720.00 3,274.10 200,395.93

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 686,283.00 3,048,622.00 156,719,006.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 324 PREPARER NAME: Chris Mills UNIT_NME: Brunswick Unit 2 PREPARER TELEPHONE: 910-457-2567 RPT_PERIOD: 200804

1. Design Electrical Rating: 980

2. Maximum Dependable Capacity (MWe-Net) 937 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 213,495.44

4. Number of Hours Generator On-line 720.00 2,860.17 207,124.89

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 676,182.00 2,682,361.00 155,775,841.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 324 PREPARER NAME: Chris Mills UNIT_NME: Brunswick Unit 2 PREPARER TELEPHONE: 910-457-2567 RPT_PERIOD: 200805

1. Design Electrical Rating: 980

2. Maximum Dependable Capacity (MWe-Net) 937 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 214,239.44

4. Number of Hours Generator On-line 744.00 3,604.17 207,868.89

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 697,370.00 3,379,731.00 156,473,211.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 324 PREPARER NAME: Chris Mills UNIT_NME: Brunswick Unit 2 PREPARER TELEPHONE: 910-457-2567 RPT_PERIOD: 200806

1. Design Electrical Rating: 980

2. Maximum Dependable Capacity (MWe-Net) 937 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 214,959.44

4. Number of Hours Generator On-line 720.00 4,324.17 208,588.89

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 662,438.00 4,042,169.00 157,135,649.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 454 PREPARER NAME: David Eder UNIT_NME: Byron Unit 1 PREPARER TELEPHONE: 815 406-2194 RPT_PERIOD: 200804

1. Design Electrical Rating: 1187

2. Maximum Dependable Capacity (MWe-Net) 1152 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 404.68 2,394.71 173,275.08

4. Number of Hours Generator On-line 395.33 2,385.35 172,171.59

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 421,742.00 2,786,677.00 185,224,175.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments B1R15 3/23/2008 S 324.67 C 4 None

SUMMARY

Byron unit 1 ended B1R15 on 4/14/08. Original scheduled outage completion was 4/9/08 at 23:00

OPERATING DATA REPORT DOCKET: 454 PREPARER NAME: David Eder UNIT_NME: Byron Unit 1 PREPARER TELEPHONE: 815 406-2194 RPT_PERIOD: 200805

1. Design Electrical Rating: 1187

2. Maximum Dependable Capacity (MWe-Net) 1152 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,138.71 174,019.08

4. Number of Hours Generator On-line 744.00 3,129.35 172,915.59

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 883,683.00 3,670,360.00 186,107,858.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 454 PREPARER NAME: David Eder UNIT_NME: Byron Unit 1 PREPARER TELEPHONE: 815 406-2194 RPT_PERIOD: 200806

1. Design Electrical Rating: 1187

2. Maximum Dependable Capacity (MWe-Net) 1152 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,858.71 174,739.08

4. Number of Hours Generator On-line 720.00 3,849.35 173,635.59

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 847,570.00 4,517,930.00 186,955,428.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 455 PREPARER NAME: David Eder UNIT_NME: Byron Unit 2 PREPARER TELEPHONE: 815 406-2194 RPT_PERIOD: 200804

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1125 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 166,138.53

4. Number of Hours Generator On-line 720.00 2,903.00 165,278.38

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 835,347.00 3,381,426.00 177,343,353.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 455 PREPARER NAME: David Eder UNIT_NME: Byron Unit 2 PREPARER TELEPHONE: 815 406-2194 RPT_PERIOD: 200805

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1125 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 166,882.53

4. Number of Hours Generator On-line 744.00 3,647.00 166,022.38

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 861,075.00 4,242,501.00 178,204,428.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 455 PREPARER NAME: David Eder UNIT_NME: Byron Unit 2 PREPARER TELEPHONE: 815 406-2194 RPT_PERIOD: 200806

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1125 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 167,602.53

4. Number of Hours Generator On-line 720.00 4,367.00 166,742.38

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 828,914.00 5,071,415.00 179,033,342.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 483 PREPARER NAME: D. Trokey UNIT_NME: Callaway Unit 1 PREPARER TELEPHONE: 573-676-4489 RPT_PERIOD: 200804

1. Design Electrical Rating: 1228

2. Maximum Dependable Capacity (MWe-Net) 1190 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 183,017.35

4. Number of Hours Generator On-line 720.00 2,903.00 180,790.66

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 879,766.00 3,558,417.00 202,135,078.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Callaway Plant downpowered on 4/4/08 to approximately 94% for approximately 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months to perform a retest of an ATMS Steam Dump. On 4/15/08 Callaway Plant load was reduced to 95% power for approximately 5.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months to allow for maintenaince work to repair a Heater Drain Pump Discharge level valve.

Callaway Plant operated at approximately 100% power for the remainder of the month of April 2008.

OPERATING DATA REPORT DOCKET: 483 PREPARER NAME: D. Trokey UNIT_NME: Callaway Unit 1 PREPARER TELEPHONE: 573-676-4489 RPT_PERIOD: 200805

1. Design Electrical Rating: 1228

2. Maximum Dependable Capacity (MWe-Net) 1190 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 183,761.35

4. Number of Hours Generator On-line 744.00 3,647.00 181,534.66

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 904,505.00 4,462,922.00 203,039,583.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On 5/31/2008 Callaway Plant downpowered to approximately 96 percent for approximately 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , to perform Turbine Valve Testing. Callaway plant operated at approximately 100% power for the remainder of May 2008.

OPERATING DATA REPORT DOCKET: 483 PREPARER NAME: D.E. Trokey UNIT_NME: Callaway Unit 1 PREPARER TELEPHONE: 573-676-4489 RPT_PERIOD: 200806

1. Design Electrical Rating: 1228

2. Maximum Dependable Capacity (MWe-Net) 1190 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 184,481.35

4. Number of Hours Generator On-line 720.00 4,367.00 182,254.66

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 861,545.00 5,324,467.00 203,901,128.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On June 3, 2008 Callaway plant downpowered to 99.4% power to perform Slave relay test for approximately 3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months . The plant remained at approximately 100% power for the remainder of June 2008.

OPERATING DATA REPORT DOCKET: 317 PREPARER NAME: Herman O. Olsen UNIT_NME: Calvert Cliffs Unit 1 PREPARER TELEPHONE: 410-495-6734 RPT_PERIOD: 200804

1. Design Electrical Rating: 845

2. Maximum Dependable Capacity (MWe-Net) 870 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,447.38 227,542.11

4. Number of Hours Generator On-line 720.00 2,394.90 224,131.88

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 637,896.00 2,091,660.00 185,487,939.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit began the month at 94% power while returning to 100% power from a forced outage due to a steam leak on valve 1FW1503. Power was restored to 100% at 0449 04/01/2008.

The unit operated at 100% power for the remainder of the month.

OPERATING DATA REPORT DOCKET: 317 PREPARER NAME: Herman O. Olsen UNIT_NME: Calvert Cliffs Unit 1 PREPARER TELEPHONE: 410-495-6734 RPT_PERIOD: 200805

1. Design Electrical Rating: 845

2. Maximum Dependable Capacity (MWe-Net) 870 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,191.38 228,286.11

4. Number of Hours Generator On-line 744.00 3,138.90 224,875.88

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 654,157.00 2,745,817.00 186,142,096.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at 100% power for the entire month.

OPERATING DATA REPORT DOCKET: 317 PREPARER NAME: Herman O. Olsen UNIT_NME: Calvert Cliffs Unit 1 PREPARER TELEPHONE: 410-495-6734 RPT_PERIOD: 200806

1. Design Electrical Rating: 845

2. Maximum Dependable Capacity (MWe-Net) 870 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,911.38 229,006.11

4. Number of Hours Generator On-line 720.00 3,858.90 225,595.88

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 617,317.00 3,363,134.00 186,759,413.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit began the month at 100% power.

On 06/06/2008 at 2258 power was reduced to approximately 85% for Main Turbine Valve Testing. When testing was complete, power was increased and reached 100% on 06/07/2008 at 0200.

The unit operated at 100% power for the remainder of the month.

OPERATING DATA REPORT DOCKET: 318 PREPARER NAME: Herman O. Olsen UNIT_NME: Calvert Cliffs Unit 2 PREPARER TELEPHONE: 410-495-6734 RPT_PERIOD: 200804

1. Design Electrical Rating: 845

2. Maximum Dependable Capacity (MWe-Net) 858 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 221,212.71

4. Number of Hours Generator On-line 720.00 2,903.00 219,245.76

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 624,526.00 2,532,071.00 182,082,102.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There were no shutdowns this month. The unit operated at 100% power for the entire month.

OPERATING DATA REPORT DOCKET: 318 PREPARER NAME: Herman O. Olsen UNIT_NME: Calvert Cliffs Unit 2 PREPARER TELEPHONE: 410-495-6734 RPT_PERIOD: 200805

1. Design Electrical Rating: 845

2. Maximum Dependable Capacity (MWe-Net) 858 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 221,956.71

4. Number of Hours Generator On-line 744.00 3,647.00 219,989.76

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 637,952.00 3,170,023.00 182,720,054.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit began the month at 100% power.

On 05/30/2008 at 2004 power was reduced to 86% for Main Turbine Valve Testing. When testing was complete, power was reduced to 65% to perform Steam Generator Feed Pump (SGFP) Oil Pump testing. Pump testing was completed on 05/31/2008 at 0105 and power was increased to 100% at 0420.

The unit operated at 100% power for the remainder of the month.

OPERATING DATA REPORT DOCKET: 318 PREPARER NAME: Herman O. Olsen UNIT_NME: Calvert Cliffs Unit 2 PREPARER TELEPHONE: 410-495-6734 RPT_PERIOD: 200806

1. Design Electrical Rating: 845

2. Maximum Dependable Capacity (MWe-Net) 858 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 222,676.71

4. Number of Hours Generator On-line 720.00 4,367.00 220,709.76

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 612,273.00 3,782,296.00 183,332,327.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at 100% power for the entire month.

OPERATING DATA REPORT DOCKET: 413 PREPARER NAME: Adrienne Driver UNIT_NME: Catawba Unit 1 PREPARER TELEPHONE: 803.701.3445 RPT_PERIOD: 200804

1. Design Electrical Rating: 1145

2. Maximum Dependable Capacity (MWe-Net) 1129 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 170,042.89

4. Number of Hours Generator On-line 720.00 2,903.00 168,097.23

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 836,867.00 3,382,937.00 187,553,400.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Catawba Unit 1 began the month of April 2008 operating at or near 100% Full Power. At 2023 on 4/30/08, power reduction from 100% Full Power was commenced for performance of Main Steam Safety Valve testing. Unit 1 concluded the month at 95% Full Power, with power reduction (to target of 94% Full Power) in progress.

OPERATING DATA REPORT DOCKET: 413 PREPARER NAME: Adrienne Driver UNIT_NME: Catawba Unit 1 PREPARER TELEPHONE: 803.701.3445 RPT_PERIOD: 200805

1. Design Electrical Rating: 1145

2. Maximum Dependable Capacity (MWe-Net) 1129 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 53.28 2,956.28 170,096.17

4. Number of Hours Generator On-line 53.00 2,956.00 168,150.23

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 49,955.00 3,432,892.00 187,603,355.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 5/3/2008 S 691.00 C 1 1EOC17 Refueling Outage

SUMMARY

Catawba Unit 1 began the month of May 2008 at 95% Full Power, with power reduction (for performance of Main Steam Safety Valve testing) in progress. The power reduction was halted at 93.5% Full Power at 0120 on 5/1/08. At 2035 on 5/1/08, following completion of MSSV testing, power escalation was commenced from 93.5% Full Power. 100% Full Power was subsequently reached at 0213 on 5/2/08. At 2100 on 5/2/08, power reduction was commenced from 100% Full Power to shut the unit down for the Unit 1 End of Cycle 17 (1EOC17) Refueling Outage. At 0500 on 5/3/08 the Main Turbine/Generator was taken off line at a power level of 10% Full Power.

Mode 2 was subsequently entered at 0508, as the unit reached 5% Full Power. At 0512 on 5/3/08, the power reduction was completed at 0% Full Power. Mode 3 was entered at 0517 with Mode 4 subsequently entered at 1102. Mode 5 was entered at 1606 on 5/3/08. At 0451 on 5/7/08, the unit entered Mode 6. No Mode was subsequently entered with the completion of total core unloading at 0025 on 5/13/08. At 1426 on 5/29/08, the unit entered Mode 6 for core reloading. Unit 1 remained in Mode 6 for the remainder of the month.

OPERATING DATA REPORT DOCKET: 413 PREPARER NAME: Adrienne Driver UNIT_NME: Catawba Unit 1 PREPARER TELEPHONE: Adrienne Driver RPT_PERIOD: 200806

1. Design Electrical Rating: 1145

2. Maximum Dependable Capacity (MWe-Net) 1129 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 270.75 3,227.03 170,366.92

4. Number of Hours Generator On-line 237.43 3,193.43 168,387.66

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 230,023.00 3,662,915.00 187,833,378.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 5/3/2008 S 480.32 C 4 1EOC17 Refueling Outage 2 6/21/2008 S 2.25 B 5 1EOC17 Refueling Outage - Main Turbine Overspeed Trip testing

SUMMARY

Catawba Unit 1 began the month of June 2008 in Mode 6, with the End-of-Cycle 17 Refueling Outage in progress. Mode 5 was entered at 2344 on 6/8/08. Mode 4 was entered at 1536 on 6/13/08. Mode 3 was entered at 1347 on 6/14/08. Following discovery of a leaking Reactor Vessel Head CONOSEAL, cooldown and depressurization of the Reactor Coolant System was initiated. Mode 4 was entered at 1200, followed by Mode 5 entry at 1713 on 6/15/08. Following CONOSEAL leak repair, Mode 4 was entered at 0540, with Mode 3 subsequently entered at 1645 on 6/18/08. Cycle 18 Reactor Startup was commenced (Mode 2 entered) at 0816 on 6/19/08. The approach to criticality was aborted, and the unit returned to Mode 3 at 1022 on 6/19/08 due to failure of the Reactor Coolant Makeup totalizer to indicate properly during efforts to achieve criticality via Reactor Coolant System dilution. The Makeup Totalizer issue was resolved and Reactor Startup re-commenced (Mode 2 entered) at 1643 on 6/19/08. Criticality was achieved at a rod position of 190 Steps Withdrawn (Control Bank D) and a critical boron concentration of 2000 ppmB at 1715 on 6/19/08. At 2327 (following completion of Zero Power Physics Testing), power escalation was commenced from 0% Full Power, and suspended at 1% Full Power at 0000 on 6/20/08. Power escalation was resumed from 1% Full Power at 0013, with Mode 1 subsequently entered at 0154 on 6/20/08. Power escalation was halted at 10% Full Power at 0312 on 6/20/08 for Main Generator Automatic Voltage Regulator (AVR) testing. The Turbine/Generator was placed on line at 0019, with power escalation subsequently commenced at 0020 on 6/21/08. At 0212 on 6/21/08, power escalation was halted at 17% Full Power for required Main Turbine Overspeed Trip Test soaking. At 0729 on 6/21/08, the Turbine/Generator was removed from service for performance of Main Turbine Overspeed Trip testing. The Turbine/Generator was placed back on line at 0944, and power escalation commenced from 17% Full Power at 1004 on 6/21/08. At 1021, power escalation was suspended at 19%

Full Power pending completion of swap to Main Feedwater nozzles, and was resumed at 1057. At 1918, power escalation was suspended at 50%

Full Power pending placement of the second Main Feedwater Pump into service, and was resumed at 1944. At 2126, power escalation was suspended at 53% Full Power for performance of Main Turbine Valve Movement testing, and was resumed at 2255 on 6/21/08. Power escalation was halted at 1032 on 6/22/08 at 76% Full Power for performance of 1BOC18 Power Ascension Testing (core flux mapping) and Main Turbine Control Valve Movement testing. Power escalation was commenced from 76% Full Power at 0123 on 6/23/08. At 0726 on 6/23/08, power escalation was halted at 88% Full Power for performance of Main Turbine Control Valve Movement testing. Power escalation was commenced from 88% Full Power at 0052, and halted at 98% Full Power at 0516 on 6/24/08, for adjustment of Reactor Coolant System Loop Full Power Delta-Temperature constants. Power Escalation was commenced from 98% Full Power at 2251 on 6/24/08. 100% Full Power was ultimately reached at 0132 on 6/25/08, and Unit 1 operated at or near 100% Full Power for the remainder of the month.

OPERATING DATA REPORT DOCKET: 414 PREPARER NAME: Adrienne Driver UNIT_NME: Catawba Unit 2 PREPARER TELEPHONE: 803.701.3445 RPT_PERIOD: 200804

1. Design Electrical Rating: 1145

2. Maximum Dependable Capacity (MWe-Net) 1129 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 162,385.79

4. Number of Hours Generator On-line 720.00 2,903.00 160,772.55

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 838,806.00 3,396,298.00 179,760,751.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Catawba Unit 2 began and concluded the month of April 2008 operating at or near 100% Full Power. No planned or unplanned power reductions were incurred during the month.

OPERATING DATA REPORT DOCKET: 414 PREPARER NAME: Adrienne Driver UNIT_NME: Catawba Unit 2 PREPARER TELEPHONE: 803.701.3445 RPT_PERIOD: 200805

1. Design Electrical Rating: 1145

2. Maximum Dependable Capacity (MWe-Net) 1129 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 163,129.79

4. Number of Hours Generator On-line 744.00 3,647.00 161,516.55

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 859,549.00 4,255,847.00 180,620,300.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Catawba Unit 2 began the month of May 2008 operating at or near 100% Full Power. At 2130 on 5/16/08, power reduction from 100% Full Power was commenced for performance of Main Turbine Control Valve Movement periodic testing. Power reduction was halted at 85% Full Power at 2253 on 5/16/08. At 2355 on 5/16/08 power escalation was commenced from 85% Full Power. 100% Full Power was ultimately reached at 0218 on 5/17/08, and Unit 2 operated at or near 100% Full Power for the remainder of the month.

OPERATING DATA REPORT DOCKET: 414 PREPARER NAME: Adrienne Driver UNIT_NME: Catawba Unit 2 PREPARER TELEPHONE: 803.701.3445 RPT_PERIOD: 200806

1. Design Electrical Rating: 1145

2. Maximum Dependable Capacity (MWe-Net) 1129 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 163,849.79

4. Number of Hours Generator On-line 720.00 4,367.00 162,236.55

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 824,660.00 5,080,507.00 181,444,960.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Catawba Unit 2 began and concluded the month of June 2008 operating at or near 100% Full Power. No planned or unplanned power reductions were incurred during the month.

OPERATING DATA REPORT DOCKET: 461 PREPARER NAME: Gary Mosley UNIT_NME: Clinton Unit 1 PREPARER TELEPHONE: 217-937-3326 RPT_PERIOD: 200804

1. Design Electrical Rating: 1062

2. Maximum Dependable Capacity (MWe-Net) 1022 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,313.59 133,181.65

4. Number of Hours Generator On-line 720.00 2,279.72 130,605.08

5. Reserve Shutdown Hours 0.00 0.00 4.00

6. Net Electrical energy Generated (MWHrs) 774,981.00 2,369,847.00 121,006,717.48 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 461 PREPARER NAME: Gary Mosley UNIT_NME: Clinton Unit 1 PREPARER TELEPHONE: 217-937-3326 RPT_PERIOD: 200805

1. Design Electrical Rating: 1062

2. Maximum Dependable Capacity (MWe-Net) 1022 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,057.59 133,925.65

4. Number of Hours Generator On-line 744.00 3,023.72 131,349.08

5. Reserve Shutdown Hours 0.00 0.00 4.00

6. Net Electrical energy Generated (MWHrs) 798,410.00 3,168,257.00 121,805,127.48 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Forced Loss MWe were due to an unplanned downpower to perform MSIV Surveillance.

OPERATING DATA REPORT DOCKET: 461 PREPARER NAME: Gary Mosley UNIT_NME: Clinton Unit 1 PREPARER TELEPHONE: 217-937-3326 RPT_PERIOD: 200806

1. Design Electrical Rating: 1062

2. Maximum Dependable Capacity (MWe-Net) 1022 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,777.59 134,645.65

4. Number of Hours Generator On-line 720.00 3,743.72 132,069.08

5. Reserve Shutdown Hours 0.00 0.00 4.00

6. Net Electrical energy Generated (MWHrs) 770,357.00 3,938,614.00 122,575,484.48 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 397 PREPARER NAME: Nick Coleman UNIT_NME: Columbia Gen Sta Unit 2 PREPARER TELEPHONE: 509-377-4538 RPT_PERIOD: 200804

1. Design Electrical Rating: 1153

2. Maximum Dependable Capacity (MWe-Net) 1107 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 161,956.44

4. Number of Hours Generator On-line 720.00 2,903.00 158,128.39

5. Reserve Shutdown Hours 0.00 0.00 3,274.70

6. Net Electrical energy Generated (MWHrs) 802,816.38 3,212,040.95 160,740,386.49 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Columbia Generating Station operated at ~100% power throughout the month of April.

OPERATING DATA REPORT DOCKET: 397 PREPARER NAME: Nick Coleman UNIT_NME: Columbia Gen Sta Unit 2 PREPARER TELEPHONE: 509-377-4538 RPT_PERIOD: 200805

1. Design Electrical Rating: 1153

2. Maximum Dependable Capacity (MWe-Net) 1107 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 162,700.44

4. Number of Hours Generator On-line 744.00 3,647.00 158,872.39

5. Reserve Shutdown Hours 0.00 0.00 3,274.70

6. Net Electrical energy Generated (MWHrs) 751,933.63 3,963,974.58 161,492,320.12 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Columbia Generating Station entered the month of May at 100%. At 09:28 on 22-May, the unit downpowered to 81% due to high level trips of feedwater heaters; it stayed at 81% until the start of Economic Dispatch on 23-May. In addition the following power changes due to Economic Dispatch at the request of BPA: (1) 17:54, 23-May to 45%; 11:22, 27-May returned to 100%; (2) 22:00, 28-May to 85%; 10:38, 29-May returned to 100%; (3) 22:00, 29-May to 85%; 07:54, 30-May returned to 100%; (4) 22:01, 30-May to 65%; 12:42, 2-Jun returned to 100%.

Note: Dispatch Credit earned = 49,142.06 MWHrs.

OPERATING DATA REPORT DOCKET: 397 PREPARER NAME: Nick Coleman UNIT_NME: Columbia Gen Sta Unit 2 PREPARER TELEPHONE: 509-377-4538 RPT_PERIOD: 200806

1. Design Electrical Rating: 1153

2. Maximum Dependable Capacity (MWe-Net) 1107 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 163,420.44

4. Number of Hours Generator On-line 720.00 4,367.00 159,592.39

5. Reserve Shutdown Hours 0.00 0.00 3,274.70

6. Net Electrical energy Generated (MWHrs) 712,651.82 4,676,626.40 162,204,971.94 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Columbia Generating Station entered the month of June at 65% in Economic Dispatch. Every night in June at ~22:00 the plant down powered, at BPA's request, for Economic Dispatch to 85%; then the following morning return to 100%. The only exceptions to this pattern were at 21:40 on 6-Jun-08; the unit down powered to 18% in support of the RRC-P-1A repair. On 8-Jun-08, power was raised and maintained at 50% at request of BPA for Economic Dispatch. On the 9-Jun-08, the unit was returned to the nightly Economic Dispatch to 85%, returning each morning to 100%.

The rest of June followed this pattern.

Note: Dispatch Credit earned = 76,225.65 MWHrs.

OPERATING DATA REPORT DOCKET: 445 PREPARER NAME: G.D. Lytle UNIT_NME: Comanche Peak Unit 1 PREPARER TELEPHONE: 254-897-5455 RPT_PERIOD: 200804

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1150 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,853.65 138,212.53

4. Number of Hours Generator On-line 720.00 2,847.18 137,244.23

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 843,447.00 3,323,882.00 149,439,666.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month at 100% reactor, 1220 MWe turbine power. Unit 1 ended the month at 100% reactor, 1219 MWe turbine power.

OPERATING DATA REPORT DOCKET: 445 PREPARER NAME: G.D. Lytle UNIT_NME: Comanche Peak Unit 1 PREPARER TELEPHONE: 254-897-5455 RPT_PERIOD: 200805

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1150 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,597.65 138,956.53

4. Number of Hours Generator On-line 744.00 3,591.18 137,988.23

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 869,240.00 4,193,122.00 150,308,906.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month at 100% reactor, 1219 MWe turbine power. Unit 1 ended the month at 100% reactor, 1212 MWe turbine power.

OPERATING DATA REPORT DOCKET: 445 PREPARER NAME: G.D. Lytle UNIT_NME: Comanche Peak Unit 1 PREPARER TELEPHONE: 254-897-5455 RPT_PERIOD: 200806

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1150 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,317.65 139,676.53

4. Number of Hours Generator On-line 720.00 4,311.18 138,708.23

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 836,727.00 5,029,849.00 151,145,633.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month at 100% reactor, 1212 MWe turbine power. On 06/13/08 at 2254, Unit 1 commenced activities for a planned power reduction to conduct OPT-217, routine main turbine stop and control valve testing. At 2300, a control rod urgent failure was received when the control rods attempted to move during the boration evolution. At 2321, power was stabilized at 94.5% reactor, 1138 MWe turbine. On 06/14/08 at 0016, the OPT-217 testing activities were suspended and Unit 1 began returning to 100% reactor power to stabilize plant conditions while the rod control urgent failure was investigated and corrected. At 0200, Unit 1 returned to 100% reactor power. At 1553, the rod control system was tested after repair and operability restored. On 06/28/08 at 1904, the Unit 1 Turbine Driven Auxiliary Feedwater Pump (TDAFWP) automatically started when the TDAFWP steam supply valve, 1-HV-2452-1 failed open due to a failed actuator diaphragm. Control Room operators lowered power from 100% to about 95% power, 1150 MWe turbine power per station procedures. at 1948, the TDAFWP steam supply valve was manully isolated and the unit commenced return to 100% reactor power. At 2120, Unit 1 returned to 100% reactor power operation. On 06/29/08 at 1007, the TDAFWP steam supply valve was tested after repair and restored to operability. Unit 1 ended the month at 100% reactor, 1206 MWe turbine power.

OPERATING DATA REPORT DOCKET: 446 PREPARER NAME: G.D. Lytle UNIT_NME: Comanche Peak Unit 2 PREPARER TELEPHONE: 254-897-5455 RPT_PERIOD: 200804

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1150 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 289.08 2,386.83 117,053.62

4. Number of Hours Generator On-line 272.00 2,360.78 116,431.60

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 279,814.00 2,723,398.00 128,890,119.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2-08-2 3/29/2008 S 448.00 C 4 Planned refueling outage, 2RF10.

SUMMARY

Unit 2 began the month shutdown in MODE 5, refueling outage 2RF10 in progress. On 04/01/08 at 0830, Unit 2 entered MODE 6. On 04/03/08 at 1030, commenced core offload. On 04/05/08 at 2037, completed core offload and entered defueled condition. On 04/08/08 at 0241 Unit 2 enterred MODE 6, commencing core reload. On 04/14/08 at 0720, Unit 2 entered MODE 5. On 04/17/08 at 0809, Unit 2 entered MODE 4. On 04/17/08 at 2105, Unit 2 entered MODE 3. On 04/18/08 at 1930, Unit 2 entered MODE 2. On 04/18/08 at 2255, Unit 2 reactor is critical. on 04/19/08 at 1148, Unit 2 entered MODE 1. On 04/19/08 at 1600, Unit 2 synchronized to the grid ending refueling outage 2RF10 in about 21 days.

On 04/23/08 at 0318, Unit 2 attained 100% reactor, 1219 MWe turbine power. On 04/26/08 at 1800, control room operators manually ranback the turbine to 1100 MWe per station procedures, when the moisture separator reheater, reheater drain tank 2B1 normal level control valve, controller 2-LK-2704 failed. The controller was repaired and Unit 2 returned to full power in about 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months . Unit 2 ended the month at 100% reactor, 1219 MWE.

OPERATING DATA REPORT DOCKET: 446 PREPARER NAME: G.D. Lytle UNIT_NME: Comanche Peak Unit 2 PREPARER TELEPHONE: 254-897-2301 RPT_PERIOD: 200805

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1150 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,130.83 117,797.62

4. Number of Hours Generator On-line 744.00 3,104.78 117,175.60

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 869,640.00 3,593,038.00 129,759,759.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month at 99.5% reactor, 1219 turbine power. Unit 2 ended the month at 100% reactor, 1209 MWe turbine power.

OPERATING DATA REPORT DOCKET: 446 PREPARER NAME: G.D. Lytle UNIT_NME: Comanche Peak Unit 2 PREPARER TELEPHONE: 254-897-5455 RPT_PERIOD: 200806

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1150 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,850.83 118,517.62

4. Number of Hours Generator On-line 720.00 3,824.78 117,895.60

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 837,576.00 4,430,614.00 130,597,335.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month at 100% reactor, 1209 MWe turbine power. On 06/16/08 at 1355, a small negative reactivity addition was observed when the Positive Displacement Charging Pump (PDP) was started for post-maintenance testing. Control Room operators lowered turbine power 6 MWe to about 99.5 % reactor power to compensate. The boron concentration in the PDP portion of the system was at an unexpectedly higher concentration that the reactor cooolant system when the pump was started. At 1650, Unit 1 returned to 100% reactor, 1205 MWe turbine power.

Unit 2 ended the month at 100% reactor, 1208 MWe turbine power.

OPERATING DATA REPORT DOCKET: 315 PREPARER NAME: Sarah Gelwicks UNIT_NME: Cook Unit 1 PREPARER TELEPHONE: 269-465-5901 RPT_PERIOD: 200804

1. Design Electrical Rating: 1084

2. Maximum Dependable Capacity (MWe-Net) 1030 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 33.53 2,039.83 208,634.32

4. Number of Hours Generator On-line 25.57 1,979.90 205,675.82

5. Reserve Shutdown Hours 0.00 0.00 321.00

6. Net Electrical energy Generated (MWHrs) 7,206.00 2,089,978.00 195,371,423.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 359 3/26/2008 S 694.43 C 4 U1C22 Refueling Outage began 03/26/08 @ 0015 hours1.736111e-4 days 0.00417 hours 2.480159e-5 weeks 5.7075e-6 months . Synch to grid on 4/29/08 @ 2226 hours0.0258 days 0.618 hours 0.00368 weeks 8.46993e-4 months .

SUMMARY

U1C22 Refueling Outage began with generator offline: March 26, 2008 @ 00:15 (Rx still online for turbine test). Rx offline on March 26, 2008 @

00:31. Rx critical on April 29, 2008 @ 14:28. Synch to grid on April 29, 2008 @ 22:26.

OPERATING DATA REPORT DOCKET: 315 PREPARER NAME: Sarah Gelwicks UNIT_NME: Cook Unit 1 PREPARER TELEPHONE: 269-465-5901 RPT_PERIOD: 200805

1. Design Electrical Rating: 1084

2. Maximum Dependable Capacity (MWe-Net) 1030 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,783.83 209,378.32

4. Number of Hours Generator On-line 744.00 2,723.90 206,419.82

5. Reserve Shutdown Hours 0.00 0.00 321.00

6. Net Electrical energy Generated (MWHrs) 792,104.00 2,882,082.00 196,163,527.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

None

OPERATING DATA REPORT DOCKET: 315 PREPARER NAME: Sarah Gelwicks UNIT_NME: Cook Unit 1 PREPARER TELEPHONE: 269-465-5901 RPT_PERIOD: 200806

1. Design Electrical Rating: 1084

2. Maximum Dependable Capacity (MWe-Net) 1030 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,503.83 210,098.32

4. Number of Hours Generator On-line 720.00 3,443.90 207,139.82

5. Reserve Shutdown Hours 0.00 0.00 321.00

6. Net Electrical energy Generated (MWHrs) 747,680.00 3,629,762.00 196,911,207.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

None

OPERATING DATA REPORT DOCKET: 316 PREPARER NAME: Sarah Gelwicks UNIT_NME: Cook Unit 2 PREPARER TELEPHONE: 269-465-5901 RPT_PERIOD: 200804

1. Design Electrical Rating: 1107

2. Maximum Dependable Capacity (MWe-Net) 1077 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 182,545.86

4. Number of Hours Generator On-line 720.00 2,903.00 178,495.07

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 792,662.00 3,206,168.00 178,938,355.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

None.

OPERATING DATA REPORT DOCKET: 316 PREPARER NAME: Sarah Gelwicks UNIT_NME: Cook Unit 2 PREPARER TELEPHONE: 269-465-5901 RPT_PERIOD: 200805

1. Design Electrical Rating: 1107

2. Maximum Dependable Capacity (MWe-Net) 1077 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 183,289.86

4. Number of Hours Generator On-line 723.53 3,626.53 179,218.60

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 783,746.00 3,989,914.00 179,722,101.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 227 5/17/2008 S 20.47 B 5 Maintenance Shutdown to correct turbine intercept valve problem (Rx Stayed Online). Generator went offline on 5/17/08 @ 0806 hours0.00933 days 0.224 hours 0.00133 weeks 3.06683e-4 months and synched to the grid on 5/18/08 @ 0434 hours0.00502 days 0.121 hours 7.175926e-4 weeks 1.65137e-4 months .

SUMMARY

Maintenance Shutdown to correct turbine intercept valve problem (Rx Stayed Online). Generator went offline on 5/17/08 @ 0806 hours0.00933 days 0.224 hours 0.00133 weeks 3.06683e-4 months and synched to the grid on 5/18/08 @ 0434 hours0.00502 days 0.121 hours 7.175926e-4 weeks 1.65137e-4 months .

OPERATING DATA REPORT DOCKET: 316 PREPARER NAME: Sarah Gelwicks UNIT_NME: Cook Unit 2 PREPARER TELEPHONE: 269-465-5901 RPT_PERIOD: 200806

1. Design Electrical Rating: 1107

2. Maximum Dependable Capacity (MWe-Net) 1077 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 184,009.86

4. Number of Hours Generator On-line 720.00 4,346.53 179,938.60

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 776,774.00 4,766,688.00 180,498,875.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

None

OPERATING DATA REPORT DOCKET: 298 PREPARER NAME: Grant Reynolds UNIT_NME: Cooper Unit 1 PREPARER TELEPHONE: 816-825-2726 RPT_PERIOD: 200804

1. Design Electrical Rating: 778

2. Maximum Dependable Capacity (MWe-Net) 757 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 264.87 2,447.87 234,224.27

4. Number of Hours Generator On-line 264.67 2,447.67 231,138.07

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 171,925.20 1,810,469.20 159,609,893.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-01 4/12/2008 S 455.33 C 1 None

SUMMARY

No Outage information for this reporting period.

OPERATING DATA REPORT DOCKET: 298 PREPARER NAME: Grant Reynolds UNIT_NME: Cooper Unit 1 PREPARER TELEPHONE: 402-825-2726 RPT_PERIOD: 200805

1. Design Electrical Rating: 778

2. Maximum Dependable Capacity (MWe-Net) 757 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 369.90 2,817.77 234,594.17

4. Number of Hours Generator On-line 314.33 2,762.00 231,452.40

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 218,031.00 2,028,500.20 159,827,924.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-01 4/12/2008 S 429.67 C 4 None

SUMMARY

No Outage information for this reporting period.

OPERATING DATA REPORT DOCKET: 298 PREPARER NAME: Grant Reynolds UNIT_NME: Cooper Unit 1 PREPARER TELEPHONE: 402-825-2726 RPT_PERIOD: 200806

1. Design Electrical Rating: 778

2. Maximum Dependable Capacity (MWe-Net) 757 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,537.77 235,314.17

4. Number of Hours Generator On-line 720.00 3,482.00 232,172.40

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 552,091.00 2,580,591.20 160,380,015.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

No Outage information for this reporting period.

OPERATING DATA REPORT DOCKET: 302 PREPARER NAME: Louis Barbieri UNIT_NME: Crystal River Unit 3 PREPARER TELEPHONE: (352) 563-2943 RPT_PERIOD: 200804

1. Design Electrical Rating: 860

2. Maximum Dependable Capacity (MWe-Net) 838 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,437.73 201,126.48

4. Number of Hours Generator On-line 720.00 2,425.45 198,527.15

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 628,613.55 2,075,428.25 157,205,295.59 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 302 PREPARER NAME: Louis Barbieri UNIT_NME: Crystal River Unit 3 PREPARER TELEPHONE: (352) 563-2943 RPT_PERIOD: 200805

1. Design Electrical Rating: 860

2. Maximum Dependable Capacity (MWe-Net) 838 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,181.73 201,870.48

4. Number of Hours Generator On-line 744.00 3,169.45 199,271.15

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 607,240.66 2,682,668.91 157,812,536.25 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 302 PREPARER NAME: Louis Barbieri UNIT_NME: Crystal River Unit 3 PREPARER TELEPHONE: (352) 563-2943 RPT_PERIOD: 200806

1. Design Electrical Rating: 860

2. Maximum Dependable Capacity (MWe-Net) 838 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,901.73 202,590.48

4. Number of Hours Generator On-line 720.00 3,889.45 199,991.15

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 619,993.87 3,302,662.78 158,432,530.12 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 346 PREPARER NAME: Glenn Mitchell UNIT_NME: Davis-Besse Unit 1 PREPARER TELEPHONE: 330-384-5027 RPT_PERIOD: 200804

1. Design Electrical Rating: 893

2. Maximum Dependable Capacity (MWe-Net) 879 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 1,972.55 180,657.31

4. Number of Hours Generator On-line 720.00 1,826.17 177,598.80

5. Reserve Shutdown Hours 0.00 0.00 5,532.00

6. Net Electrical energy Generated (MWHrs) 637,980.00 1,598,526.10 147,767,408.10 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On April 25, 2008, a planned power reduction to aproximately 61% power was conducted in order to repair Main Feedwater Pump #1 duplex strainer leak and other summer readiness maintenance issues. Following completion of the planned work, the reactor was returned to full power on April 27, 2008.

OPERATING DATA REPORT DOCKET: 346 PREPARER NAME: Glenn Mitchell UNIT_NME: Davis-Besse Unit 1 PREPARER TELEPHONE: 330-384-5027 RPT_PERIOD: 200805

1. Design Electrical Rating: 893

2. Maximum Dependable Capacity (MWe-Net) 879 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,716.55 181,401.31

4. Number of Hours Generator On-line 744.00 2,570.17 178,342.80

5. Reserve Shutdown Hours 0.00 0.00 5,532.00

6. Net Electrical energy Generated (MWHrs) 668,821.00 2,267,347.10 148,436,229.10 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at full power for the month of May.

OPERATING DATA REPORT DOCKET: 346 PREPARER NAME: Lawrence Criscione UNIT_NME: Davis-Besse Unit 1 PREPARER TELEPHONE: 330-384-4693 RPT_PERIOD: 200806

1. Design Electrical Rating: 893

2. Maximum Dependable Capacity (MWe-Net) 879 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,436.55 182,121.31

4. Number of Hours Generator On-line 720.00 3,290.17 179,062.80

5. Reserve Shutdown Hours 0.00 0.00 5,532.00

6. Net Electrical energy Generated (MWHrs) 631,100.00 2,898,447.10 149,067,329.10 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

A planned power reduction was conducted from June 6 to June 8, 2008, to approximately 60% power to support Main Feedwater Pump Turbine #1 Control Valve oscillation troubleshooting. An unplanned power reduction was conducted on June 19, 2008, to approximately 98% power to support High Pressure Feedwater Heater #6 level control valve repairs.

OPERATING DATA REPORT DOCKET: 275 PREPARER NAME: Don Malone UNIT_NME: Diablo Canyon Unit 1 PREPARER TELEPHONE: 805-545-4859 RPT_PERIOD: 200804

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1122 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 177,459.44

4. Number of Hours Generator On-line 720.00 2,903.00 175,649.69

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 821,028.00 3,294,272.00 184,488,069.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Diablo Canyon Unit 1 began and ended the month of April 2008 at approximately 100 percent power.

OPERATING DATA REPORT DOCKET: 275 PREPARER NAME: Don Malone UNIT_NME: Diablo Canyon Unit 1 PREPARER TELEPHONE: 805-545-4859 RPT_PERIOD: 200805

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1122 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 178,203.44

4. Number of Hours Generator On-line 744.00 3,647.00 176,393.69

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 794,846.00 4,089,118.00 185,282,915.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Diablo Canyon Unit 1 began and ended the month of May at approximately 100 percent reactor power.

Unit 1 reduced power once during the month of May to approximately 50 percent reactor power to perform planned maintenance cleaning of the Pacific Ocean cooling water system components.

OPERATING DATA REPORT DOCKET: 275 PREPARER NAME: Don Malone UNIT_NME: Diablo Canyon Unit 1 PREPARER TELEPHONE: 805-545-4859 RPT_PERIOD: 200806

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1122 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 178,923.44

4. Number of Hours Generator On-line 720.00 4,367.00 177,113.69

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 819,292.00 4,908,410.00 186,102,207.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Diablo Canyon Unit 1 began and ended the month of June 2008 in Mode 1, Power Operations, at approximately 100 percent reactor power.

OPERATING DATA REPORT DOCKET: 323 PREPARER NAME: Don Malone UNIT_NME: Diablo Canyon Unit 2 PREPARER TELEPHONE: 805-545-4859 RPT_PERIOD: 200804

1. Design Electrical Rating: 1151

2. Maximum Dependable Capacity (MWe-Net) 1118 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 466.33 1,270.35 172,890.56

4. Number of Hours Generator On-line 445.53 1,248.56 171,153.41

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 451,388.00 1,321,735.00 181,499,279.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 2/3/2008 S 274.47 C 4 Diablo Canyon Unit 2 shutdown and opened the main generator breaker to enter the fourteenth refueling outage.

Diablo Canyon Unit 2 started up and closed the main generator breaker to end the fourteenth refueling outage.

SUMMARY

Diablo Canyon began the month of April 2008 shutdown continuing the Unit 2 fourteenth refueling outage (2R14).

On April 12, 2008, at 10:28 PDT Diablo Canyon Unit 2 closed the main generator output breaker ending 2R14.

Diablo Canyon Unit 2 ended the month of April 2008 at approximately 100 percent power.

OPERATING DATA REPORT DOCKET: 323 PREPARER NAME: Don Malone UNIT_NME: Diablo Canyon Unit 2 PREPARER TELEPHONE: 805-545-4859 RPT_PERIOD: 200805

1. Design Electrical Rating: 1151

2. Maximum Dependable Capacity (MWe-Net) 1118 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,014.35 173,634.56

4. Number of Hours Generator On-line 744.00 1,992.56 171,897.41

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 849,409.00 2,171,144.00 182,348,688.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Diablo Canyon Unit 2 began and ended the month of May at approximately 100 percent reactor power.

OPERATING DATA REPORT DOCKET: 323 PREPARER NAME: Don Malone UNIT_NME: Diablo Canyon Unit 2 PREPARER TELEPHONE: 805-545-4859 RPT_PERIOD: 200806

1. Design Electrical Rating: 1151

2. Maximum Dependable Capacity (MWe-Net) 1118 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,734.35 174,354.56

4. Number of Hours Generator On-line 720.00 2,712.56 172,617.41

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 818,956.00 2,990,100.00 183,167,644.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Diablo Canyon Unit 2 began and ended the month of June 2008 in Mode 1, Power Operations, at approximately 100 percent reactor power.

OPERATING DATA REPORT DOCKET: 237 PREPARER NAME: Joseph Reda UNIT_NME: Dresden Unit 2 PREPARER TELEPHONE: (815) 416-3081 RPT_PERIOD: 200804

1. Design Electrical Rating: 867

2. Maximum Dependable Capacity (MWe-Net) 850 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 259,259.59

4. Number of Hours Generator On-line 720.00 2,903.00 250,186.95

5. Reserve Shutdown Hours 0.00 0.00 4.00

6. Net Electrical energy Generated (MWHrs) 626,258.00 2,523,173.00 173,981,753.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On April 26, at approximately 0100 hours0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months , load was reduced to approximately 90% electrical output to perform control rod drive troubleshooting and maintenance. The unit returned to full power operation at approximately 0500 hours0.00579 days 0.139 hours 8.267196e-4 weeks 1.9025e-4 months .

With the exception of short periods for routine maintenance and surveillances, Unit 2 operated at full power for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 237 PREPARER NAME: Joseph Reda UNIT_NME: Dresden Unit 2 PREPARER TELEPHONE: (815) 416-3081 RPT_PERIOD: 200805

1. Design Electrical Rating: 867

2. Maximum Dependable Capacity (MWe-Net) 850 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 260,003.59

4. Number of Hours Generator On-line 744.00 3,647.00 250,930.95

5. Reserve Shutdown Hours 0.00 0.00 4.00

6. Net Electrical energy Generated (MWHrs) 646,373.00 3,169,546.00 174,628,126.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On May 31, at approximately 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months , load was reduced to approximately 77% electrical output to perform turbine valve testing, control rod drive scram time testing, a control rod pattern adjustment, and various other activities. The unit remained at this power level for the remainder of the month.

With the exception of short periods for routine maintenance and surveillances, Unit 2 operated at full power for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 237 PREPARER NAME: Joseph Reda UNIT_NME: Dresden Unit 2 PREPARER TELEPHONE: (815) 416-3081 RPT_PERIOD: 200806

1. Design Electrical Rating: 867

2. Maximum Dependable Capacity (MWe-Net) 850 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 260,723.59

4. Number of Hours Generator On-line 720.00 4,367.00 251,650.95

5. Reserve Shutdown Hours 0.00 0.00 4.00

6. Net Electrical energy Generated (MWHrs) 623,525.00 3,793,071.00 175,251,651.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit began the month at reduced power to perform turbine valve testing, control rod drive scram time testing, a control rod pattern adjustment, and various other activities. The unit returned to full power operation on June 1 at approximately 1300 hours0.015 days 0.361 hours 0.00215 weeks 4.9465e-4 months .

With the exception of short periods for routine maintenance and surveillances, Unit 2 operated at full power for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 249 PREPARER NAME: Joseph Reda UNIT_NME: Dresden Unit 3 PREPARER TELEPHONE: (815) 416-3081 RPT_PERIOD: 200804

1. Design Electrical Rating: 867

2. Maximum Dependable Capacity (MWe-Net) 850 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,703.75 246,965.83

4. Number of Hours Generator On-line 720.00 2,678.95 238,686.31

5. Reserve Shutdown Hours 0.00 0.00 1.00

6. Net Electrical energy Generated (MWHrs) 626,589.00 2,316,743.00 166,843,318.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On April 12, at approximately 0200 hours0.00231 days 0.0556 hours 3.306878e-4 weeks 7.61e-5 months , load was reduced to approximately 77% electrical output to perform a repair on the LVDT of turbine control valve #3. The unit returned to full power operation at approximately 0500 hours0.00579 days 0.139 hours 8.267196e-4 weeks 1.9025e-4 months .

With the exception of short periods for routine maintenance and surveillances, Unit 3 operated at full power for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 249 PREPARER NAME: Joseph Reda UNIT_NME: Dresden Unit 3 PREPARER TELEPHONE: (815) 416-3081 RPT_PERIOD: 200805

1. Design Electrical Rating: 867

2. Maximum Dependable Capacity (MWe-Net) 850 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,447.75 247,709.83

4. Number of Hours Generator On-line 744.00 3,422.95 239,430.31

5. Reserve Shutdown Hours 0.00 0.00 1.00

6. Net Electrical energy Generated (MWHrs) 646,154.00 2,962,897.00 167,489,472.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On May 3, at approximately 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months , load was reduced to approximately 70% electrical output to perform turbine valve testing, control rod drive scram time testing, a control rod pattern adjustment, and various other activities. The unit returned to full power operation on May 4 at approximately 0700 hours0.0081 days 0.194 hours 0.00116 weeks 2.6635e-4 months .

With the exception of short periods for routine maintenance and surveillances, Unit 3 operated at full power for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 249 PREPARER NAME: Joseph Reda UNIT_NME: Dresden Unit 3 PREPARER TELEPHONE: (815) 416-3081 RPT_PERIOD: 200806

1. Design Electrical Rating: 867

2. Maximum Dependable Capacity (MWe-Net) 850 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,167.75 248,429.83

4. Number of Hours Generator On-line 720.00 4,142.95 240,150.31

5. Reserve Shutdown Hours 0.00 0.00 1.00

6. Net Electrical energy Generated (MWHrs) 625,365.00 3,588,262.00 168,114,837.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On June 28, at approximately 0100 hours0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months , load was reduced to approximately 84% electrical output to perform a control rod pattern adjustment.

The unit returned to full power operation at approximately 0400 hours0.00463 days 0.111 hours 6.613757e-4 weeks 1.522e-4 months .

With the exception of short periods for routine maintenance and surveillances, Unit 3 operated at full power for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 331 PREPARER NAME: Wendell Horst UNIT_NME: Duane Arnold Unit 1 PREPARER TELEPHONE: 319 851-7359 RPT_PERIOD: 200804

1. Design Electrical Rating: 613.5

2. Maximum Dependable Capacity (MWe-Net) 593 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 237,550.99

4. Number of Hours Generator On-line 720.00 2,903.00 232,932.70

5. Reserve Shutdown Hours 0.00 0.00 192.80

6. Net Electrical energy Generated (MWHrs) 440,061.10 1,777,508.45 112,820,704.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 331 PREPARER NAME: Wendell Horst UNIT_NME: Duane Arnold Unit 1 PREPARER TELEPHONE: 319 851-7359 RPT_PERIOD: 200805

1. Design Electrical Rating: 613.5

2. Maximum Dependable Capacity (MWe-Net) 593 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 238,294.99

4. Number of Hours Generator On-line 744.00 3,647.00 233,676.70

5. Reserve Shutdown Hours 0.00 0.00 192.80

6. Net Electrical energy Generated (MWHrs) 450,926.83 2,228,435.28 113,271,631.13 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 331 PREPARER NAME: Wendell J. Horst UNIT_NME: Duane Arnold Unit 1 PREPARER TELEPHONE: 319 851-7359 RPT_PERIOD: 200806

1. Design Electrical Rating: 613.5

2. Maximum Dependable Capacity (MWe-Net) 593 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 239,014.99

4. Number of Hours Generator On-line 720.00 4,367.00 234,396.70

5. Reserve Shutdown Hours 0.00 0.00 192.80

6. Net Electrical energy Generated (MWHrs) 425,093.10 2,653,528.38 113,696,724.23 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 348 PREPARER NAME: Mandy M. Ludlam UNIT_NME: Farley Unit 1 PREPARER TELEPHONE: 334-899-5156 ext. 2449 RPT_PERIOD: 200804

1. Design Electrical Rating: 854

2. Maximum Dependable Capacity (MWe-Net) 851 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 223,566.07

4. Number of Hours Generator On-line 720.00 2,903.00 221,003.28

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 621,428.00 2,510,351.00 177,463,895.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There were no significant power reductions this period.

OPERATING DATA REPORT DOCKET: 348 PREPARER NAME: Mandy M. Ludlam UNIT_NME: Farley Unit 1 PREPARER TELEPHONE: 334-899-5156 ext. 2449 RPT_PERIOD: 200805

1. Design Electrical Rating: 854

2. Maximum Dependable Capacity (MWe-Net) 851 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 224,310.07

4. Number of Hours Generator On-line 744.00 3,647.00 221,747.28

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 638,016.00 3,148,367.00 178,101,911.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There were no significant power reductions this period.

OPERATING DATA REPORT DOCKET: 348 PREPARER NAME: Mandy M. Ludlam UNIT_NME: Farley Unit 1 PREPARER TELEPHONE: 334-899-5156 ext. 2449 RPT_PERIOD: 200806

1. Design Electrical Rating: 854

2. Maximum Dependable Capacity (MWe-Net) 851 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 225,030.07

4. Number of Hours Generator On-line 720.00 4,367.00 222,467.28

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 616,414.00 3,764,781.00 178,718,325.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There were no significant power reductions this period.

OPERATING DATA REPORT DOCKET: 364 PREPARER NAME: Mandy M. Ludlam UNIT_NME: Farley Unit 2 PREPARER TELEPHONE: 334-899-5156 ext. 2449 RPT_PERIOD: 200804

1. Design Electrical Rating: 855

2. Maximum Dependable Capacity (MWe-Net) 860 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 206,955.17

4. Number of Hours Generator On-line 720.00 2,903.00 204,758.13

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 600,555.00 2,506,277.00 166,184,997.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

At 1334 on April 14, Unit 2 began derating to approximately 59.2% due to 2B steam generator feed pump trip. The unit returned to 100% power at 1350 on April 17.

OPERATING DATA REPORT DOCKET: 364 PREPARER NAME: Mandy M. Ludlam UNIT_NME: Farley Unit 2 PREPARER TELEPHONE: 334-899-5156 ext. 2449 RPT_PERIOD: 200805

1. Design Electrical Rating: 855

2. Maximum Dependable Capacity (MWe-Net) 860 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 207,699.17

4. Number of Hours Generator On-line 744.00 3,647.00 205,502.13

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 645,890.00 3,152,167.00 166,830,887.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There were no significant power reductions this period.

OPERATING DATA REPORT DOCKET: 364 PREPARER NAME: Mandy M. Ludlam UNIT_NME: Farley Unit 2 PREPARER TELEPHONE: 334-899-5156 ext. 2449 RPT_PERIOD: 200806

1. Design Electrical Rating: 855

2. Maximum Dependable Capacity (MWe-Net) 860 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 208,419.17

4. Number of Hours Generator On-line 720.00 4,367.00 206,222.13

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 621,764.00 3,773,931.00 167,452,651.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There were no significant power reductions this period.

OPERATING DATA REPORT DOCKET: 341 PREPARER NAME: E. Sorg UNIT_NME: Fermi Unit 2 PREPARER TELEPHONE: 734-586-4294 RPT_PERIOD: 200804

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1087 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,855.31 141,567.82

4. Number of Hours Generator On-line 720.00 2,827.15 137,198.92

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 801,333.00 3,145,736.00 140,810,915.92 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at 100% reactor power (excluding minor changes for surveillance testing) the entire month with no exceptions.

OPERATING DATA REPORT DOCKET: 341 PREPARER NAME: E. Sorg UNIT_NME: Fermi Unit 2 PREPARER TELEPHONE: 734-586-4294 RPT_PERIOD: 200805

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1087 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,599.31 142,311.82

4. Number of Hours Generator On-line 744.00 3,571.15 137,942.92

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 823,695.00 3,969,431.00 141,634,610.92 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at 100% reactor power (with the exception of minor power changes for testing) the entire month of May with the following exceptions:

--5/11/2008 0030 to 0503: Planned downpower to 92% for HPSV/HPCV testing.

--5/29/2008 2258 to 5/30/2008 0005: Planned downpower to 95% for CRDM maintenance.

--5/31/2008 2200 to 6/1/2008 1738: Planned downpower to 82% for pump swaps and rod pattern adjustment.

OPERATING DATA REPORT DOCKET: 341 PREPARER NAME: Eric T. Sorg UNIT_NME: Fermi Unit 2 PREPARER TELEPHONE: 734-586-4294 RPT_PERIOD: 200806

1. Design Electrical Rating: 1150

2. Maximum Dependable Capacity (MWe-Net) 1087 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,319.31 143,031.82

4. Number of Hours Generator On-line 720.00 4,291.15 138,662.92

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 782,492.00 4,751,923.00 142,417,102.92 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at 100% reactor power (with the exception of minor power changes for testing) the entire month with the following exceptions:

6/1/2008 0000 to 1544: Continuation of planned downpower to 82% reactor power for rod pattern adjustment and equipment swaps.

6/15/2008 0003 to 6/16/2008 1800: Unplanned downpower to 99.5% reactor power due to DCS power supply failure.

6/19/2008 0939 to 1010: Planned downpower to 99% reactor power for RRMG Set A isolator replacement.

OPERATING DATA REPORT DOCKET: 333 PREPARER NAME: Mick Baker UNIT_NME: FitzPatrick Unit 1 PREPARER TELEPHONE: 315-349-6181 RPT_PERIOD: 200804

1. Design Electrical Rating: 816

2. Maximum Dependable Capacity (MWe-Net) 813 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 681.53 2,864.53 225,846.76

4. Number of Hours Generator On-line 663.22 2,846.22 220,237.38

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 523,100.00 2,366,743.00 167,460,543.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments FO- 4/5/2008 F 56.78 A 1 Shutdown due to steam leak on weld.

186

SUMMARY

On April 4th at 09:02 the plant entered a downpower to perform repairs on the A Reactor Feed Pump Seal. While performing repairs the plant entered a forced shutdown due to a steam leak on a weld in the feedwater system. The generator was taken offline on April 5th at 03:16 and had all Rods in at 07:20. The plant went critical on April 6th at 21:48 and came back online on April 7th at 12:03 and returned to full power on April 13th at 16:48. On April 20th the plant reduced power to 94% to perform control rod testing. The plant returned to 100% power at 09:21. On April 27th at 08:00 the plant reduced power to 80% power to perform a control rod adjustment. The plant returned to 100% power at 20:54.

OPERATING DATA REPORT DOCKET: 333 PREPARER NAME: Mick Baker UNIT_NME: FitzPatrick Unit 1 PREPARER TELEPHONE: 315-349-6181 RPT_PERIOD: 200805

1. Design Electrical Rating: 816

2. Maximum Dependable Capacity (MWe-Net) 813 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,608.53 226,590.76

4. Number of Hours Generator On-line 744.00 3,590.22 220,981.38

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 599,707.00 2,966,450.00 168,060,250.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On May 4th at 21:01 the plant performed a planned downpower to 55% to repair the A Reactor Feed Pump Seal. The plant returned to full power on May 8th at 13:07. On May 10th at 00:18 the plant performed a downpower to 75% power to perform a control rod adjustment. The plant returned to full power on May 10th at 23:22. On May 18th at 08:00 the plant performed a downpower to 93 % to perform control rod testing. On May 20th at 09:16 the plant started a down power to 80% power to perform Increase Core Flow Testing. The core flow testing continued at slightly reduced power. The plant returned to 100% power on May 23 at 22:05. On May 25th the plant performed a downpower to 93% power to perform control rod testing.

OPERATING DATA REPORT DOCKET: 333 PREPARER NAME: Mick Baker UNIT_NME: FitzPatrick Unit 1 PREPARER TELEPHONE: 315-349-6181 RPT_PERIOD: 200806

1. Design Electrical Rating: 816

2. Maximum Dependable Capacity (MWe-Net) 813 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,328.53 227,310.76

4. Number of Hours Generator On-line 720.00 4,310.22 221,701.38

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 604,352.00 3,570,802.00 168,664,602.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On June 1st at 08:05 the plant performed a dowpower to 78 % to perform a control rod adjustment. The plant returned to full power at 23:48. On June 8th at 08:05 the plant performed a downpower to 94% power to perform control rod testing. The plant returned to full power at 09:14. On June 15 the plant performed a downpower to 80% power to perform a sequence exchange. The plant returned to full power at 23:49. On June 22 at 08:08 the plant reduced power to 94% power to perform control rod testing. The plant returned to full power at 09:40. On June 29th at 08:05 the plant performed a dowpower to 75% power to perform a control rod adjustment. The plant returned to full power on June 30th at 19:04.

OPERATING DATA REPORT DOCKET: 285 PREPARER NAME: E. P. Matzke UNIT_NME: Fort Calhoun Unit 1 PREPARER TELEPHONE: 402-533-6855 RPT_PERIOD: 200804

1. Design Electrical Rating: 502

2. Maximum Dependable Capacity (MWe-Net) 482 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 453.58 2,461.63 247,516.66

4. Number of Hours Generator On-line 453.58 2,453.23 246,073.31

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 220,184.60 1,207,888.40 108,204,654.70 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008- 4/19/2008 S 266.42 C 1 Plant shutdown to commence refueling outage.

02

SUMMARY

Fort Calhoun Station operated at a nominal 100% power until April 15 when power was reduced to 50% to repair a feedwater pump. Power was restored to 100% on April 17 following the repairs. The plant operated at 100% until April 19 when the plant was shutdown for a refueling outage.

OPERATING DATA REPORT DOCKET: 285 PREPARER NAME: E. P. Matzke UNIT_NME: Fort Calhoun Unit 1 PREPARER TELEPHONE: 402-533-6855 RPT_PERIOD: 200805

1. Design Electrical Rating: 502

2. Maximum Dependable Capacity (MWe-Net) 482 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 0.00 2,461.63 247,516.66

4. Number of Hours Generator On-line 0.00 2,453.23 246,073.31

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.00 1,207,888.40 108,204,654.70 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008- 4/19/2008 S 744.00 C 4 Plant shutdown to commence refueling outage.

02

SUMMARY

The refueling outage continued through the month.

OPERATING DATA REPORT DOCKET: 285 PREPARER NAME: E. P. Matzke UNIT_NME: Fort Calhoun Unit 1 PREPARER TELEPHONE: 402-533-6855 RPT_PERIOD: 200806

1. Design Electrical Rating: 502

2. Maximum Dependable Capacity (MWe-Net) 482 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 344.97 2,806.60 247,861.63

4. Number of Hours Generator On-line 326.78 2,780.01 246,400.09

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 123,486.30 1,331,374.70 108,328,141.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008- 4/19/2008 S 393.22 C 4 Plant shutdown to commence refueling outage.

02

SUMMARY

The plant was returned to operation on June 17, 2008. The plant reached a nominal 100% power on June 20, 2008, and has operated there since.

OPERATING DATA REPORT DOCKET: 244 PREPARER NAME: John V Walden UNIT_NME: Ginna Unit 1 PREPARER TELEPHONE: 585-771-3588 RPT_PERIOD: 200804

1. Design Electrical Rating: 585

2. Maximum Dependable Capacity (MWe-Net) 560 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 475.58 2,658.58 283,511.28

4. Number of Hours Generator On-line 475.60 2,658.60 280,181.40

5. Reserve Shutdown Hours 0.00 0.00 8.50

6. Net Electrical energy Generated (MWHrs) 274,258.40 1,539,596.70 130,105,750.04 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 4/20/2008 S 244.40 C 1 Refueling Outage

SUMMARY

The unit operated at full power from the start of the month until 4/17/08 when reactor coastdown commenced. Power reduction for the refueling outage began at 1536 on 4/20/08. The unit was scrammed at 1935 and was off-line at 1936 on 4/20/08. The unit remained shutdown for the refueling and maintenance through the end of the month.

OPERATING DATA REPORT DOCKET: 244 PREPARER NAME: John V Walden UNIT_NME: Ginna Unit 1 PREPARER TELEPHONE: 585-771-3588 RPT_PERIOD: 200805

1. Design Electrical Rating: 585

2. Maximum Dependable Capacity (MWe-Net) 560 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 501.97 3,160.55 284,013.25

4. Number of Hours Generator On-line 485.87 3,144.47 280,667.27

5. Reserve Shutdown Hours 0.00 0.00 8.50

6. Net Electrical energy Generated (MWHrs) 261,040.00 1,800,636.70 130,366,790.04 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 4/20/2008 S 258.13 C 4 Refueling Outage

SUMMARY

Reactor was made critical on 5/11/08 at 0202. The unit was placed on-line at 1808 later the same day. Full power was reached on 5/14/08 at aproximately 2300. On 5/15/08, a controlled power reduction to 50% was performed for a loss of the Heater Drain Tank pumps due to a loss of the heater drain tank control system.

OPERATING DATA REPORT DOCKET: 244 PREPARER NAME: John V. Walden UNIT_NME: Ginna Unit 1 PREPARER TELEPHONE: 585-771-3588 RPT_PERIOD: 200806

1. Design Electrical Rating: 585

2. Maximum Dependable Capacity (MWe-Net) 560 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,880.55 284,733.25

4. Number of Hours Generator On-line 720.00 3,864.47 281,387.27

5. Reserve Shutdown Hours 0.00 0.00 8.50

6. Net Electrical energy Generated (MWHrs) 413,782.60 2,214,419.30 130,780,572.64 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at full power for the entire month of June. Average power for the month was 99.9%.

OPERATING DATA REPORT DOCKET: 416 PREPARER NAME: David Lin UNIT_NME: Grand Gulf Unit 1 PREPARER TELEPHONE: 601-437-6793 RPT_PERIOD: 200804

1. Design Electrical Rating: 1279

2. Maximum Dependable Capacity (MWe-Net) 1266 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,740.53 180,586.32

4. Number of Hours Generator On-line 720.00 2,641.32 176,495.14

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 904,539.00 3,224,275.00 206,964,044.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 416 PREPARER NAME: David Lin UNIT_NME: Grand Gulf Unit 1 PREPARER TELEPHONE: 601-437-6793 RPT_PERIOD: 200805

1. Design Electrical Rating: 1279

2. Maximum Dependable Capacity (MWe-Net) 1266 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,484.53 181,330.32

4. Number of Hours Generator On-line 744.00 3,385.32 177,239.14

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 944,431.00 4,168,706.00 207,908,475.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 416 PREPARER NAME: Brian Copeland UNIT_NME: Grand Gulf Unit 1 PREPARER TELEPHONE: 601-437-2738 RPT_PERIOD: 200806

1. Design Electrical Rating: 1279

2. Maximum Dependable Capacity (MWe-Net) 1266 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,204.53 182,050.32

4. Number of Hours Generator On-line 720.00 4,105.32 177,959.14

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 904,995.00 5,073,701.00 208,813,470.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 400 PREPARER NAME: David Berens UNIT_NME: Harris Unit 1 PREPARER TELEPHONE: 919.362.2679 RPT_PERIOD: 200804

1. Design Electrical Rating: 941.7

2. Maximum Dependable Capacity (MWe-Net) 900 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 161,493.60

4. Number of Hours Generator On-line 720.00 2,903.00 160,260.22

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 661,179.00 2,681,628.00 137,852,640.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 400 PREPARER NAME: David Berens UNIT_NME: Harris Unit 1 PREPARER TELEPHONE: 919.362.2679 RPT_PERIOD: 200805

1. Design Electrical Rating: 941.7

2. Maximum Dependable Capacity (MWe-Net) 900 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 162,237.60

4. Number of Hours Generator On-line 744.00 3,647.00 161,004.22

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 679,592.00 3,361,220.00 138,532,232.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 400 PREPARER NAME: David Berens UNIT_NME: Harris Unit 1 PREPARER TELEPHONE: 919.362.2679 RPT_PERIOD: 200806

1. Design Electrical Rating: 941.7

2. Maximum Dependable Capacity (MWe-Net) 900 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 162,957.60

4. Number of Hours Generator On-line 720.00 4,367.00 161,724.22

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 648,293.00 4,009,513.00 139,180,525.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 321 PREPARER NAME: K. E. Drawdy UNIT_NME: Hatch Unit 1 PREPARER TELEPHONE: 912-366-2007 RPT_PERIOD: 200804

1. Design Electrical Rating: 885

2. Maximum Dependable Capacity (MWe-Net) 876 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 1,898.58 233,440.08

4. Number of Hours Generator On-line 720.00 1,817.17 226,964.67

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 627,981.00 1,473,491.00 170,957,203.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month of April operating at ~853 GMWe (~2579 CMWt) and raising reactor pressure per plant startup procedure while monitoring 1C SRV tailpipe temperature. Shift ramped load at <2.5% per hour to ~901 GMWe (<2777 CMWt) with crossflow out of service on April 1. Shift reduced load to ~848 GMWe (~2568 CMWt) later on April 1 due to 1F SRV increased tailpipe temperature. After commencing a <3% per hour ramp, shift reduced load to ~840 GMWe (~2579 CMWt) early on April 2 due to 1F SRV increased tailpipe temperature. Shift commenced again a

<3% per hour ramp and holding reactor vessel pressure (RVP) at 1025 psig on April 2, but derated to ~838 GMWe (~2576 CMWt) due to 1F SRV increased tailpipe temperature. Shift ramped load at 1% per hour followed by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months soaks and holding (RVP) at 1021 psig on April 3. Shift maintained ~895 GMWe (~2734 CMWt) for the current rod pattern on April 4. Shift reduced load to ~759 GMWe (~2327 CMWt) on April 4 to perform a rod pattern adjustment. Shift ramped load at less than 3% per hour to ~839 GMWe (~2579 CMWt) early on April 5. Shift then ramped load at 1% per hour followed by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months pressure soaks and maintaining RVP at 1021 psig to ~903 GMWe (~2770 CMWt) on April 6. Shift reduced load to ~856 GMWe (~2579 CMWt) late on April 6 to perform a rod pattern adjustment. Shift ramped load at 1% per hour followed by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months soaks and maintaining RVP at 1021 psig to reach ~921 GMWe (~2770 CMWt) early on April 8. Shift maintained these parameters until early on April 16 at which time RVP was raised ~1.0 psig per day. Shift reduced load to ~832 GMWe (~2518 CMWt) late on April 18 to perform CRD exercises and TSV testing. Shift then reduced load to ~808 GMWe (~2405 CMWt) on April 18 to perform a rod pattern adjustment. Shift ramped load at ~1% per hour to ~856 GMWe (~2579 CMWt) on April 19. Shift then ramped load at 1% per hour followed by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months pressure soaks and maintaining RVP at ~1024 psig to ~921 GMWe (~2770 CMWt) on April 20. Shift maintained ~921 GMWe (~2770 CMWt) and raised RVP ~1.0 psig per day until unit reached 100% RTP (~2804 CMWt) on April 30. Shift ended the month of April operating unit at 100% RTP (2804 CMWt).

OPERATING DATA REPORT DOCKET: 321 PREPARER NAME: K. E. Drawdy UNIT_NME: Hatch Unit 1 PREPARER TELEPHONE: 912-366-2007 RPT_PERIOD: 200805

1. Design Electrical Rating: 885

2. Maximum Dependable Capacity (MWe-Net) 876 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,642.58 234,184.08

4. Number of Hours Generator On-line 744.00 2,561.17 227,708.67

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 655,584.00 2,129,075.00 171,612,787.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month of May operating at 100% rated thermal power (RTP) (~2804 CMWt). Shift reduced load to ~848 GMWe(~2532 CMWt) on May 12 due to indications of 1F SRV leakage. Shift commenced load ramp late on May 15 and reached 100% RTP (~2804 CMWt) early on May 16 with reactor vessel pressure at ~1034 psig. Shift continued to raise reactor vessel pressure at ~1.0 psig increments per hour followed by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months soaks until normal operating pressure was obtained on May 17. Shift ended the month of May operating unit at 100% RTP (~2804 CMWt).

OPERATING DATA REPORT DOCKET: 321 PREPARER NAME: K. E. Drawdy UNIT_NME: Hatch Unit 1 PREPARER TELEPHONE: 912-366-2007 RPT_PERIOD: 200806

1. Design Electrical Rating: 885

2. Maximum Dependable Capacity (MWe-Net) 876 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,362.58 234,904.08

4. Number of Hours Generator On-line 720.00 3,281.17 228,428.67

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 623,382.00 2,752,457.00 172,236,169.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month of June operating at 100% rated thermal power (RTP) (~2804 CMWt). Shift reduced load to ~820 GMWe(~2505 CMWt) on June 7 to perform CRD exercises, TSV testing, and a rod pattern adjustment. Shift ramped load to 100% RTP early on June 8, but then had to derate to ~908 GMWe (<2777 CMWt) for less than one hour due to the derate clock being ON, after which unit was returned to 100% RTP (~2804 CMWt). Shift reduced load to ~618 GMWe (~1954 CMWt) on June 28 to perform a rod sequence exchange, TCV testing, CRD exercises, a rod pattern adjustment, repair of a control rod hydraulic unit and a MSR drain tank level control valve. Shift commenced a load ramp to the precondition envelope late on June 28, and completed ramping at <3% per hour to ~893 GMWe (<2777 CMWt) on June 29 with crossflow out of service. Shift was forced to reduce load to ~575 GMWe (~1823 CMWt) on June 29 to repair a EHC accumulator leak on TCV #2. After completing repairs, shift commenced ramping load early on June 30, and then completed ramping load at <3% per hour to ~891 GMWe (<2777 CMWt) with crossflow out of service. Shift reduced load to ~792 GMWe (~2327 CMWt) late on June 30 to perform a rod pattern adjustment. Shift ended the month of June operating unit at ~792 GMWe

(~2327 CMWt) while completing a rod pattern adjustment.

OPERATING DATA REPORT DOCKET: 366 PREPARER NAME: K. E. Drawdy UNIT_NME: Hatch Unit 2 PREPARER TELEPHONE: 912-366-2007 RPT_PERIOD: 200804

1. Design Electrical Rating: 908

2. Maximum Dependable Capacity (MWe-Net) 883 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,851.98 210,571.03

4. Number of Hours Generator On-line 720.00 2,833.77 205,960.04

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 641,351.00 2,509,157.00 158,728,864.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month of April operating at 100% rated thermal power (RTP) (~2804 CMWt). Shift reduced load to ~921 GMWe (<2790 CMWt) on April 8 due to a loss of the plant Process Computer and Core Thermal Power (CTP) program. Shift returned unit to 100% rated thermal power

(~2804 CMWt) later on April 8 after crossflow was returned to service. Shift reduced load to ~828 GMWe (~2523 CMWt) on April 27 to perform CRD exercises and TSV testing. Shift ramped load ramp to ~919 GMWe (<2777 CMWT) early on April 28 and maintained load with crossflow out of service, after which shift completed ramping unit to 100% RTP (~2804 CMWt) on April 28. Shift ended the month of April operating unit at 100%

RTP (2804 CMWt).

OPERATING DATA REPORT DOCKET: 366 PREPARER NAME: K. E. Drawdy UNIT_NME: Hatch Unit 2 PREPARER TELEPHONE: 912-366-2007 RPT_PERIOD: 200805

1. Design Electrical Rating: 908

2. Maximum Dependable Capacity (MWe-Net) 883 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 620.50 3,472.48 211,191.53

4. Number of Hours Generator On-line 546.63 3,380.40 206,506.67

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 452,200.00 2,961,357.00 159,181,064.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments08-002 5/3/2008 S 197.37 B 1 Unit shutdown for repair of Safety Relief Valves.

SUMMARY

Unit 2 began the month of May operating at 100% rated thermal power (RTP) (~2804 CMWt). Shift began a load reduction late on May 2 to shut down unit to allow planned repair of safety relief valves. Shift manually scrammed the reactor at 09:05 on May 3 to remove unit off line. After repairs were completed, shift brought the reactor critical at 09:39 on May 7. The reactor was manually scrammed at 19:42 on May 7 to allow repair of an identified steam line leak. Repairs were completed and the reactor was brought to critical conditions at 22:38 on May 8. The startup was further delayed due to a valve lineup error which hindered turbine shell warming. Additionally a weld was completed on a 4th stage extraction steam drain trap during this delay. After resolving a main turbine "EXCESSIVE SPEED ERROR" alarm incurred during the initial main turbine roll, the main generator was tied to the grid at 14:27 on May 11. Power ascension was stopped and maintained at ~480 GMWe (~1532 CMWT) due to algae buildup on the cooling tower screens on May 12. Shift resumed power ascension early on May 13 and reached ~839 GMWe (~2532 CMWT) for the current rod pattern. Shift performed a rod pattern adjustment late on May 13 and ramped load to ~857 GMWe (2579 CMWt) early on May 14, at which time reactor vessel pressure (RVP) was increased per plant startup procedure. Pressure increases were suspended briefly on May 14 due to 2D safety relief valve high temperature, after which RVP increases resumed. Shift then ramped load at <3% per hour to ~920 GMWe (~2764 CMWt) late on May 14 with crossflow out of service and for the current rod pattern. Shift reduced load to ~804 GMWe (~2383 CMWt) on May 15 to perform a rod pattern adjustment, and ramped load at <3% per hour to ~915 GMWe (~2760 CMWt) with crossflow out of service. Shift completed ramp to 100% RTP

(~2804 CMWt) on May 16. Shift reduced load to ~835 GMWe (~2532 CMWt) on May 24 to perform CRD exercises and TSV testing. Shift then reduced load to ~811GMWe (~2355 CMWt) to perform a rod pattern adjustment early on May 25. Shift completed load ramp at <3% per hour to 100% RTP (~2804 CMWt) on May 25. Shift ended the month of May operating unit at 100% RTP (~2804 CMWT).

OPERATING DATA REPORT DOCKET: 366 PREPARER NAME: K. E. Drawdy UNIT_NME: Hatch Unit 2 PREPARER TELEPHONE: 912-366-2007 RPT_PERIOD: 200806

1. Design Electrical Rating: 908

2. Maximum Dependable Capacity (MWe-Net) 883 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,192.48 211,911.53

4. Number of Hours Generator On-line 720.00 4,100.40 207,226.67

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 629,534.00 3,590,891.00 159,810,598.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month of June operating at 100% rated thermal power (RTP) (~2804 CMWt). Shift reduced load to ~904 GMWe (~2711 CMWt) on June 8 to perform a rod pattern adjustment. Shift completed ramping load at <3% per hour to 100% RTP (~2804 CMWt) on June 8. Shift reduced load to ~530 GMWe (~1682 CMWt) on June 14 to perform a rod sequence exchange, CRD exercises, TCV testing, and TSV testing.

Shift completed ramping load at <3% per hour to ~903 GMWe (< 2777 CMWt) on June 15 with crossflow out of service. Shift reduced load to

~900 GMWe (<2708 CMWt) early on June 16 to perform TSV testing, and then reduced load to ~838 GMWe (~2495 CMWt) to perform a rod pattern adjustment. Shift completed ramping at <3% per hour to ~904 GMWe (<2777 CMWt) with crossflow out of service on June 16. Shift later on the same day completed ramping at <3% per hour to 100% RTP (~2804 CMWt). Shift reduced load to ~867 GMWe (~2540 CMWt) late on June 20 to perform a rod pattern adjustment. Shift completed ramping at <3% per hour to reach 100% RTP (~2804 CMWt) on June 21. Shift ended the month of June operating unit at 100% RTP (~2804 CMWt).

OPERATING DATA REPORT DOCKET: 354 PREPARER NAME: Possessky UNIT_NME: Hope Creek Unit 1 PREPARER TELEPHONE: 856-339-1160 RPT_PERIOD: 200804

1. Design Electrical Rating: 1083

2. Maximum Dependable Capacity (MWe-Net) 1049 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 161,566.68

4. Number of Hours Generator On-line 720.00 2,875.23 158,153.92

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 770,955.00 3,076,467.00 161,308,255.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Unit entered the month at about 100%. Power was reduced to 81% on 4/20 due to a brush fire under the transmission lines. The Unit returned to about 100% on 4/20.

Power was reduced to 89% on 4/30 to obtain data for implementation of extended power uprate. The Unit ended the month at 89%.

The SRVs were not challenged by any overpressurization events or transients that would have required the valves to respond automatically.

OPERATING DATA REPORT DOCKET: 354 PREPARER NAME: Possessky UNIT_NME: Hope Creek Unit 1 PREPARER TELEPHONE: 856-339-1160 RPT_PERIOD: 200805

1. Design Electrical Rating: 1083

2. Maximum Dependable Capacity (MWe-Net) 1049 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 162,310.68

4. Number of Hours Generator On-line 744.00 3,619.23 158,897.92

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 799,700.00 3,876,167.00 162,107,955.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Unit entered the month at 89%. Power was raised to 95% on 5/2 to continue data collection for extended power uprate (EPU). Power was raised to 100% on 5/4. On 5/16 the License Ammendment to implement EPU was received which raised rated core thermal power from 3339 to 3840MWt. This changed 100% to 87%. On 5/22 power was raised from 87% to 91% for EPU. On 5/25 power was reduced to 43% due to a blown 1E fuse and a TS required shutdown. Plant shutdown was terminated on 5/25 at 44% and power was raised to 91% on 5/25. On 5/27 power was raised to 95% for EPU.

The Unit ended the month at 95%.

The SRVs were not challenged by any overpressurization events or transients that would have required the valves to respond automatically.

OPERATING DATA REPORT DOCKET: 354 PREPARER NAME: Possessky UNIT_NME: Hope Creek Unit 1 PREPARER TELEPHONE: 856-339-1160 RPT_PERIOD: 200806

1. Design Electrical Rating: 1083

2. Maximum Dependable Capacity (MWe-Net) 1049 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 163,030.68

4. Number of Hours Generator On-line 720.00 4,339.23 159,617.92

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 832,578.00 4,708,745.00 162,940,533.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The Unit entered the month at 95%. Power was raised to 97% on 6/1 for extended power uprate (EPU). On 6/14 power was lowered to 66% to conduct Main Turbine Valve Testing and 5A feedwater heater repair. Power was returned to 97% on 6/15.

The Unit ended the month at 97%.

The SRVs were not challenged by any overpressurization events or transients that would have required the valves to respond automatically.

OPERATING DATA REPORT DOCKET: 247 PREPARER NAME: B. Beckman UNIT_NME: Indian Point Unit 2 PREPARER TELEPHONE: (914)734-5850 RPT_PERIOD: 200804

1. Design Electrical Rating: 1035

2. Maximum Dependable Capacity (MWe-Net) 998 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 260.92 2,250.19 218,899.44

4. Number of Hours Generator On-line 231.10 2,220.37 214,593.80

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 195,816.00 2,239,396.00 187,574,897.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 20080 3/23/2008 F 457.43 A 4 Manual Reactor Scram initiated due to the loss of 1 22 Main Boiler Feed Pump (CR-IP2-2008-1333).

Decision was made to remain in a forced shutdown until 3/26/08 at 0000 hours0 days 0 hours 0 weeks 0 months then to begin a Scheduled Refueling Outage (2R18).

20080 4/20/2008 F 12.95 A 5 Main Turbine Generator manually tripped due to a 2 Main Generator Negative Sequence Relay (relay

46) problem. Relay was incorrectly labeled at the factory. The reactor remained critical.

20080 4/21/2008 F 18.52 A 2 Unit shutdown by Manual Reactor trip, due to 3 lowering Steam Generator water levels caused by a bistable failure associated with Main Boiler Feed Pump input to the Main Turbine runback circuitry.

(CR-IP2-2008-2334).

SUMMARY

Indian Point 2 was synchronized to the grid for a total of 231.11 Hours, producing a gross generation of 203,528 MWhrs. The unit began the month shutdown for Refueling Outage 2R18. Cycle 19 Initial Criticality was achieved on 4/19/08 at approximately 1415 hours0.0164 days 0.393 hours 0.00234 weeks 5.384075e-4 months , and Initial Synchronization was achieved on 4/20/08 at approximately 0126 hours0.00146 days 0.035 hours 2.083333e-4 weeks 4.7943e-5 months . Power ascension was begun until 4/20/08 at approximately 0132 hours0.00153 days 0.0367 hours 2.18254e-4 weeks 5.0226e-5 months when the Main Turbine Generator was manually tripped due to a Main Generator Negative Sequence Relay (relay 46) problem (CR-IP2-2008-2305 & 2307). The Reactor remained critical. After replacing the incorrectly labeled relay the turbine was again synchronized to the grid on 4/20/08 at approximately 1429 hours0.0165 days 0.397 hours 0.00236 weeks 5.437345e-4 months and power ascension again begun. On 4/21/08 at approximately 1125 hours0.013 days 0.313 hours 0.00186 weeks 4.280625e-4 months the unit was manually tripped due to lowering Steam Generator levels caused by a bistable failure associated with Main Boiler Feed Pump input to the Main Turbine runback circuitry. After repairs the Reactor was made critical on 4/22/08 at approximately 0015 hours1.736111e-4 days 0.00417 hours 2.480159e-5 weeks 5.7075e-6 months , and the Turbine synchronized to the bus that same day at approximately 0556 hours0.00644 days 0.154 hours 9.193122e-4 weeks 2.11558e-4 months with the unit in power ascension. Full power was achieved on 4/25/08 at approximately 1030 hours0.0119 days 0.286 hours 0.0017 weeks 3.91915e-4 months . The unit remained on line for the remainder of the month.

OPERATING DATA REPORT DOCKET: 247 PREPARER NAME: Ron Macina UNIT_NME: Indian Point Unit 2 PREPARER TELEPHONE: (914)734-6839 RPT_PERIOD: 200805

1. Design Electrical Rating: 1035

2. Maximum Dependable Capacity (MWe-Net) 998 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,994.19 219,643.44

4. Number of Hours Generator On-line 744.00 2,964.37 215,337.80

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 764,999.65 3,004,395.65 188,339,896.65 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Indian Point 2 was synchronized to the grid for a total of 744 hours0.00861 days 0.207 hours 0.00123 weeks 2.83092e-4 months , producing a gross generation of 790,142 MWhrs. The unit operated at full power for the entire month.

OPERATING DATA REPORT DOCKET: 247 PREPARER NAME: Ron Macina UNIT_NME: Indian Point Unit 2 PREPARER TELEPHONE: (914)734-6839 RPT_PERIOD: 200806

1. Design Electrical Rating: 1035

2. Maximum Dependable Capacity (MWe-Net) 998 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,714.19 220,363.44

4. Number of Hours Generator On-line 707.32 3,671.69 216,045.12

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 711,579.40 3,715,975.05 189,051,476.05 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 20080 6/4/2008 S 12.68 B 5 Shutdown to repair/replace the Generrex Eciter 15v 4 Power Supply.

SUMMARY

Indian Point 2 was synchronized to the grid for a total of 707.32 hours3.703704e-4 days 0.00889 hours 5.291005e-5 weeks 1.2176e-5 months , producing a gross generation of 735,850 MWhrs. The unit began the month at full power. On June 4, 2008, at approximately 0100 hours0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months , commenced a planned main turbine generator load reduction to repair/replace the Generrex Exciter 15v power supply. The main generator output breakers 7 and 9 were opened (turbine trip) at approximately 0856 hours0.00991 days 0.238 hours 0.00142 weeks 3.25708e-4 months on June 4, 2008, but the reactor remained critical. Following repairs on June 4, 2008 at approximately 2137 hours0.0247 days 0.594 hours 0.00353 weeks 8.131285e-4 months , the unit was synchronized to the grid and achieved full power the following day at approximately 0340 hours0.00394 days 0.0944 hours 5.621693e-4 weeks 1.2937e-4 months .

OPERATING DATA REPORT DOCKET: 286 PREPARER NAME: Bob Beckman UNIT_NME: Indian Point Unit 3 PREPARER TELEPHONE: (914)734-5850 RPT_PERIOD: 200804

1. Design Electrical Rating: 1048

2. Maximum Dependable Capacity (MWe-Net) 1030 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 190,267.42

4. Number of Hours Generator On-line 720.00 2,903.00 187,123.89

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 755,097.00 3,044,573.00 172,246,195.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Indian Point 3 was synchronized to the grid for a total of 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months , producing a gross generation of 777,992 MWhrs. The unit operated at full power for the entire month.

OPERATING DATA REPORT DOCKET: 286 PREPARER NAME: Ron Macina UNIT_NME: Indian Point Unit 3 PREPARER TELEPHONE: (914)734-6839 RPT_PERIOD: 200805

1. Design Electrical Rating: 1048

2. Maximum Dependable Capacity (MWe-Net) 1030 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 191,011.42

4. Number of Hours Generator On-line 744.00 3,647.00 187,867.89

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 779,142.00 3,823,715.00 173,025,337.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Indian Point 3 was synchronized to the grid for a total of 744 hours0.00861 days 0.207 hours 0.00123 weeks 2.83092e-4 months , producing a gross generation of 804,001 MWhrs. The unit operated at full power for the entire month.

OPERATING DATA REPORT DOCKET: 286 PREPARER NAME: Ron Macina UNIT_NME: Indian Point Unit 3 PREPARER TELEPHONE: (914)734-6839 RPT_PERIOD: 200806

1. Design Electrical Rating: 1048

2. Maximum Dependable Capacity (MWe-Net) 1030 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 191,731.42

4. Number of Hours Generator On-line 720.00 4,367.00 188,587.89

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 751,116.00 4,574,831.00 173,776,453.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Indian Point 3 was synchronized to the grid for a total of 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months , producing a gross generation of 776,189 MWhrs. The unit operated at full power for the entire month.

OPERATING DATA REPORT DOCKET: 305 PREPARER NAME: J.A. Gadzinski UNIT_NME: Kewaunee Unit 1 PREPARER TELEPHONE: 920-388-8776 RPT_PERIOD: 200804

1. Design Electrical Rating: 574

2. Maximum Dependable Capacity (MWe-Net) 556 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 0.00 2,111.90 251,180.92

4. Number of Hours Generator On-line 0.00 2,111.10 248,697.37

5. Reserve Shutdown Hours 0.00 0.00 10.00

6. Net Electrical energy Generated (MWHrs) 0.00 1,200,671.00 126,218,107.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments KR29 3/29/2008 S 720.00 C 4 On March 29, 2008 @ 0006, the unit was shutdown for KR29 Refueling Outage.

On May 9, 2008 @ 1800, G-1 was closed.

SUMMARY

On March 29, 2008, at 0006, the unit was shut down for a planned refueling outage. (KR29)

OPERATING DATA REPORT DOCKET: 305 PREPARER NAME: J. A. Gadzinski UNIT_NME: Kewaunee Unit 1 PREPARER TELEPHONE: 920-388-8776 RPT_PERIOD: 200805

1. Design Electrical Rating: 574

2. Maximum Dependable Capacity (MWe-Net) 556 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 558.50 2,670.40 251,739.42

4. Number of Hours Generator On-line 534.00 2,645.10 249,231.37

5. Reserve Shutdown Hours 0.00 0.00 10.00

6. Net Electrical energy Generated (MWHrs) 283,772.00 1,484,443.00 126,501,879.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments KR29 3/29/2008 S 210.00 C 4 On March 29, 2008 @ 0006, the unit was shutdown for KR29 Refueling Outage.

On May 9, 2008 @ 1800, G-1 was closed.

SUMMARY

Closed G-1 on May 9, 2008 @ 1800. Unit remains at 100% steady state.

OPERATING DATA REPORT DOCKET: 305 PREPARER NAME: JA Gadzinski UNIT_NME: Kewaunee Unit 1 PREPARER TELEPHONE: 920-388-8776 RPT_PERIOD: 200806

1. Design Electrical Rating: 574

2. Maximum Dependable Capacity (MWe-Net) 556 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,390.40 252,459.42

4. Number of Hours Generator On-line 720.00 3,365.10 249,951.37

5. Reserve Shutdown Hours 0.00 0.00 10.00

6. Net Electrical energy Generated (MWHrs) 410,671.00 1,895,114.00 126,912,550.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit continues to operate at 100% steady state

OPERATING DATA REPORT DOCKET: 373 PREPARER NAME: S. Shields UNIT_NME: LaSalle Unit 1 PREPARER TELEPHONE: (815) 415-2811 RPT_PERIOD: 200804

1. Design Electrical Rating: 1154

2. Maximum Dependable Capacity (MWe-Net) 1111 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,334.83 160,468.98

4. Number of Hours Generator On-line 720.00 2,313.32 158,155.94

5. Reserve Shutdown Hours 0.00 0.00 1.00

6. Net Electrical energy Generated (MWHrs) 829,542.00 2,315,552.00 163,217,723.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at or near full power during the month of April without exceptions.

OPERATING DATA REPORT DOCKET: 373 PREPARER NAME: S. Shields UNIT_NME: LaSalle Unit 1 PREPARER TELEPHONE: (815) 415-2811 RPT_PERIOD: 200805

1. Design Electrical Rating: 1154

2. Maximum Dependable Capacity (MWe-Net) 1111 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,078.83 161,212.98

4. Number of Hours Generator On-line 744.00 3,057.32 158,899.94

5. Reserve Shutdown Hours 0.00 0.00 1.00

6. Net Electrical energy Generated (MWHrs) 851,854.00 3,167,406.00 164,069,577.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at or near full power during May 2008, with the following exception: On May 25, power was reduced to approximately 77% for rod sequence exchange and scram insertion time testing. The unit was returned to full power the same day, and operated at or near full power for the remainder of the month.

OPERATING DATA REPORT DOCKET: 373 PREPARER NAME: S. Shields UNIT_NME: LaSalle Unit 1 PREPARER TELEPHONE: (815) 415-2811 RPT_PERIOD: 200806

1. Design Electrical Rating: 1154

2. Maximum Dependable Capacity (MWe-Net) 1111 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,798.83 161,932.98

4. Number of Hours Generator On-line 720.00 3,777.32 159,619.94

5. Reserve Shutdown Hours 0.00 0.00 1.00

6. Net Electrical energy Generated (MWHrs) 817,073.00 3,984,479.00 164,886,650.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at or near full power during June 2008 without exception.

OPERATING DATA REPORT DOCKET: 374 PREPARER NAME: S. Shields UNIT_NME: LaSalle Unit 2 PREPARER TELEPHONE: (815) 415-2811 RPT_PERIOD: 200804

1. Design Electrical Rating: 1154

2. Maximum Dependable Capacity (MWe-Net) 1111 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 152,579.62

4. Number of Hours Generator On-line 720.00 2,903.00 151,366.01

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 827,743.00 3,340,128.00 158,547,525.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at or near full power during April 2008, with the following exception: On April 29, power was reduced to approximately 82% for repairs to the #4 TCV LVDT. The unit was returned to full power the same day, and operated at or near full power for the remainder of the month.

OPERATING DATA REPORT DOCKET: 374 PREPARER NAME: S. Shields UNIT_NME: LaSalle Unit 2 PREPARER TELEPHONE: (815) 415-2811 RPT_PERIOD: 200805

1. Design Electrical Rating: 1154

2. Maximum Dependable Capacity (MWe-Net) 1111 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 153,323.62

4. Number of Hours Generator On-line 744.00 3,647.00 152,110.01

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 841,686.00 4,181,814.00 159,389,211.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at or near full power during May 2008, with the following exception: On May 17, power was reduced to approximately 52% for rod sequence exchange, scram time testing, channel distortion testing, and to conduct repairs on all four turbine control valve LVDTs. The unit was returned to full power on May 19, 2008, and operated at or near full power for the remainder of the month.

OPERATING DATA REPORT DOCKET: 374 PREPARER NAME: S. Shields UNIT_NME: LaSalle Unit 2 PREPARER TELEPHONE: (815) 415-2811 RPT_PERIOD: 200806

1. Design Electrical Rating: 1154

2. Maximum Dependable Capacity (MWe-Net) 1111 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 154,043.62

4. Number of Hours Generator On-line 720.00 4,367.00 152,830.01

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 815,406.00 4,997,220.00 160,204,617.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at or near full power during June 2008 without exception.

OPERATING DATA REPORT DOCKET: 352 PREPARER NAME: Greg J. Lee UNIT_NME: Limerick Unit 1 PREPARER TELEPHONE: 610-718-3707 RPT_PERIOD: 200804

1. Design Electrical Rating: 1191

2. Maximum Dependable Capacity (MWe-Net) 1134 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,413.58 175,103.20

4. Number of Hours Generator On-line 720.00 2,370.30 172,910.25

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 831,274.00 2,613,865.00 183,285,183.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 started the month of April 2008 at 100% Rated Thermal Power (RTP).

On April 5th at 22:01, Unit 1 reactor entered a planned load drop to 84.7% RTP for a rod pattern adjustment.

On April 6th at 03:26, reactor power was restored to 99.5% RTP.

On April 12th at 09:02, Unit 1 entered a planned load drop to 98.0% RTP for a rod pattern adjustment. At 10:25, reactor power was restored to 99.6% RTP.

Unit 1 ended the month of April 2008 at 100% RTP.

OPERATING DATA REPORT DOCKET: 352 PREPARER NAME: Greg Lee UNIT_NME: Limerick Unit 1 PREPARER TELEPHONE: 610-718-3707 RPT_PERIOD: 200805

1. Design Electrical Rating: 1191

2. Maximum Dependable Capacity (MWe-Net) 1134 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,157.58 175,847.20

4. Number of Hours Generator On-line 744.00 3,114.30 173,654.25

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 853,857.00 3,467,722.00 184,139,040.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month of May 2008 at 100% of rated thermal power (RTP).

On May 16th at 2203 hours0.0255 days 0.612 hours 0.00364 weeks 8.382415e-4 months , reactor power was reduced from 99.9% to 75.4% RTP for quarterly control rod scram time testing and rod pattern adjustment.

On May 17th at 1209 hours0.014 days 0.336 hours 0.002 weeks 4.600245e-4 months , reactor power was restored to 99.5% RTP.

On May 24th at 2201 hours0.0255 days 0.611 hours 0.00364 weeks 8.374805e-4 months , reactor power was reduced from 99.9% to 98.1% RTP for rod pattern adjustment.

On May 25th at 0037 hours4.282407e-4 days 0.0103 hours 6.117725e-5 weeks 1.40785e-5 months , reactor power was restored to 99.6% RTP.

Unit 1 ended the month of May 2008 at 100% RTP.

OPERATING DATA REPORT DOCKET: 352 PREPARER NAME: Greg Lee UNIT_NME: Limerick Unit 1 PREPARER TELEPHONE: 610-718-3707 RPT_PERIOD: 200806

1. Design Electrical Rating: 1191

2. Maximum Dependable Capacity (MWe-Net) 1134 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,877.58 176,567.20

4. Number of Hours Generator On-line 720.00 3,834.30 174,374.25

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 812,736.00 4,280,458.00 184,951,776.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month of June 2008 at 100% of rated thermal power (RTP).

There were no power changes during the month of June 2008.

Unit 1 ended the month of June 2008 at 100% RTP.

OPERATING DATA REPORT DOCKET: 353 PREPARER NAME: Greg J. Lee UNIT_NME: Limerick Unit 2 PREPARER TELEPHONE: 610-718-3707 RPT_PERIOD: 200804

1. Design Electrical Rating: 1191

2. Maximum Dependable Capacity (MWe-Net) 1134 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,690.83 150,934.26

4. Number of Hours Generator On-line 720.00 2,636.80 148,862.31

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 821,780.00 3,021,240.00 162,222,962.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 started the month of April 2008 at 99.9% Rated Thermal Power (RTP).

On April 26th at 22:00, Unit 2 entered a planned load drop to 22.1% RTP for turbine valve testing.

On April 27th at 21:37, reactor power was restored to 99.7% RTP.

Unit 2 finished the month of April 2008 at 99.9% RTP.

OPERATING DATA REPORT DOCKET: 353 PREPARER NAME: Greg Lee UNIT_NME: Limerick Unit 2 PREPARER TELEPHONE: 610-718-3707 RPT_PERIOD: 200805

1. Design Electrical Rating: 1191

2. Maximum Dependable Capacity (MWe-Net) 1134 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,434.83 151,678.26

4. Number of Hours Generator On-line 744.00 3,380.80 149,606.31

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 851,846.00 3,873,086.00 163,074,808.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month of May 2008 at 99.9% of rated thermal power (RTP).

On May 1st at 0359 hours0.00416 days 0.0997 hours 5.935847e-4 weeks 1.365995e-4 months , reactor power was reduced from 100.0% to 99.2% RTP for rod pattern adjustment. At 0422 hours0.00488 days 0.117 hours 6.977513e-4 weeks 1.60571e-4 months , reactor power was restored to 99.5% RTP.

On May 22nd at 1508 hours0.0175 days 0.419 hours 0.00249 weeks 5.73794e-4 months , reactor power was reduced from 99.9% to 97.7% RTP for condenser water box leak repair. At 1638 hours0.019 days 0.455 hours 0.00271 weeks 6.23259e-4 months , reactor power was restored to 99.5% RTP.

On May 23rd at 2158 hours0.025 days 0.599 hours 0.00357 weeks 8.21119e-4 months , reactor power was reduced from 100.0% to 59.3% RTP for quarterly turbine valve testing and steam leak repair.

On May 24th at 0758 hours0.00877 days 0.211 hours 0.00125 weeks 2.88419e-4 months , reactor power was restored to 99.7% RTP.

On May 30th at 0105 hours0.00122 days 0.0292 hours 1.736111e-4 weeks 3.99525e-5 months , reactor power was reduced from 99.9% to 99.0% RTP for rod pattern adjustment. At 0134 hours0.00155 days 0.0372 hours 2.215608e-4 weeks 5.0987e-5 months , reactor power was restored to 99.5% RTP.

Unit 2 ended the month of May 2008 at 100% RTP.

OPERATING DATA REPORT DOCKET: 353 PREPARER NAME: Greg Lee UNIT_NME: Limerick Unit 2 PREPARER TELEPHONE: 610-718-3707 RPT_PERIOD: 200806

1. Design Electrical Rating: 1191

2. Maximum Dependable Capacity (MWe-Net) 1134 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,154.83 152,398.26

4. Number of Hours Generator On-line 720.00 4,100.80 150,326.31

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 810,367.00 4,683,453.00 163,885,175.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month of June 2008 at 100% of rated thermal power (RTP).

On June 7th at 15:39 hours, reactor power was reduced from 99.9% to 96.8% RTP due to excessive condensate temperature resulting from high ambient temperature conditions.

On June 8th at 01:51 hours, reactor power was restored to 99.8% RTP. At 13:44 hours, reactor power was reduced from 99.9% to 96.7% RTP due to excessive condensate temperature resulting from high ambient temperature conditions. At 23:31 hours, reactor power was restored to 99.7% RTP.

On June 9th at 11:45 hours, reactor power was reduced from 99.9% to 96.4% RTP due to excessive condensate temperature resulting from high ambient temperature conditions.

On June 10th at 03:55 hours, reactor power was restored to 99.9% RTP. At 11:20 hours, reactor power was reduced from 100.0% to 93.4% RTP due to excessive condensate temperature resulting from high ambient temperature. At 22:00 hours, reactor power was restored to 99.6% RTP.

Unit 2 ended the month of June 2008 at 99.9% RTP.

OPERATING DATA REPORT DOCKET: 369 PREPARER NAME: Kay Crane UNIT_NME: McGuire Unit 1 PREPARER TELEPHONE: (704) 875-4306 RPT_PERIOD: 200804

1. Design Electrical Rating: 1180

2. Maximum Dependable Capacity (MWe-Net) 1100 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 185,674.03

4. Number of Hours Generator On-line 720.00 2,903.00 184,286.95

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 826,387.00 3,345,781.00 199,000,337.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 369 PREPARER NAME: Kay Crane UNIT_NME: McGuire Unit 1 PREPARER TELEPHONE: (704) 875-4306 RPT_PERIOD: 200805

1. Design Electrical Rating: 1180

2. Maximum Dependable Capacity (MWe-Net) 1100 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 186,418.03

4. Number of Hours Generator On-line 744.00 3,647.00 185,030.95

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 849,045.00 4,194,826.00 199,849,382.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 369 PREPARER NAME: Kay Crane UNIT_NME: McGuire Unit 1 PREPARER TELEPHONE: (704) 875-4306 RPT_PERIOD: 200806

1. Design Electrical Rating: 1180

2. Maximum Dependable Capacity (MWe-Net) 1100 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 647.00 4,294.00 187,065.03

4. Number of Hours Generator On-line 638.00 4,285.00 185,668.95

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 700,289.00 4,895,115.00 200,549,671.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 6/26/2008 F 82.00 A 3 Unit 1 Generator Breaker opened on 06/26/2008 at 17:31 as a result of the 1B Reactor Coolant Pump Trip and subsequent low reactor coolant flow. The generator breaker was closed, following startup, on 6/30/2008 at 03:31.

SUMMARY

The Unit 1 reactor tripped on 6/26/08 at 17:31 due to low reactor coolant flow following the 1B reactor coolant pump trip. Following replacement of the faulty pump surge capacitor, the reactor was returned to critical on 6/29/08 at 18:31. Generator Breaker 1A was closed on 6/30/08 at 03:31.

Subsequently, escalation to 100% power commenced.

OPERATING DATA REPORT DOCKET: 370 PREPARER NAME: Kay Crane UNIT_NME: McGuire Unit 2 PREPARER TELEPHONE: (704) 875-4306 RPT_PERIOD: 200804

1. Design Electrical Rating: 1180

2. Maximum Dependable Capacity (MWe-Net) 1100 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 360.52 1,807.52 178,275.08

4. Number of Hours Generator On-line 323.60 1,770.60 176,882.31

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 325,923.00 1,996,677.00 196,344,782.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2 4/13/2008 S 97.67 A 1 The unit was shutdown on 4/13/08 in order to allow interim repairs on a raw cooling discharge gate (2RC-80). The need to repair the gate was known prior to initial startup, but, due to schedule concerns of qualified diver personnel, the decision was made to perform physics and turbine testing prior to gate repair. The generator was placed on line, following the gate repair and reactor startup, on 4/17/08.

1 3/1/2008 S 298.73 C 4 Unit 2 was tripped as planned, per procedure, to enter the 2EOC18 refueling outage. The generator breaker opened on reactor trip.

2A Generator Breaker was closed, as part of the planned turbine testing, on 4/13/08.

SUMMARY

Unit 2 entered the month of April in Mode 5 as part of the planned M2EOC18 refueling outage. Following heatup, the reactor was brought to critical on 4/12/08 at 16:18. Zero Power Physics Testing was then performed and the generator brought on line, by closing breaker 2A, on 4/13/08 at 10:44. Following turbine testing, the unit was shutdown at 11:23, via procedure, in order to facilitate repairs to a Raw Cooling discharge gate (2RC-80) that required cooldown to Mode 4. Following the repairs and subsequent heatup, the reactor was returned to critical on 4/16/08 at 18:34 and the generator brought on line, by closing breaker 2B, on 4/17/08 at 13:03. Power escalation followed and the unit ended the month at 100%

power.

OPERATING DATA REPORT DOCKET: 370 PREPARER NAME: Kay Crane UNIT_NME: McGuire Unit 2 PREPARER TELEPHONE: (704) 875-4306 RPT_PERIOD: 200805

1. Design Electrical Rating: 1180

2. Maximum Dependable Capacity (MWe-Net) 1100 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,551.52 179,019.08

4. Number of Hours Generator On-line 744.00 2,514.60 177,626.31

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 858,777.00 2,855,454.00 197,203,559.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 370 PREPARER NAME: Kay Crane UNIT_NME: McGuire Unit 2 PREPARER TELEPHONE: (704) 875-4306 RPT_PERIOD: 200806

1. Design Electrical Rating: 1180

2. Maximum Dependable Capacity (MWe-Net) 1100 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,271.52 179,739.08

4. Number of Hours Generator On-line 720.00 3,234.60 178,346.31

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 820,731.00 3,676,185.00 198,024,290.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 336 PREPARER NAME: K. Cook UNIT_NME: Millstone Unit 2 PREPARER TELEPHONE: 860-447-1791 X6572 RPT_PERIOD: 200804

1. Design Electrical Rating: 883.5

2. Maximum Dependable Capacity (MWe-Net) 877.7 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 121.33 2,304.33 193,152.16

4. Number of Hours Generator On-line 120.00 2,303.00 187,243.74

5. Reserve Shutdown Hours 0.00 0.00 468.20

6. Net Electrical energy Generated (MWHrs) 101,520.30 2,022,368.80 155,563,697.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008- 4/6/2008 S 600.00 C 1 Major work activities are the refueling of the reactor 01 core and 10 year ISI core barrel inspection.

SUMMARY

Millstone Unit 2 operated at or near 100% power until April 5,2008 when it was downpowered starting at 1455 hours0.0168 days 0.404 hours 0.00241 weeks 5.536275e-4 months and subsequently taken off-line at 0000 on April 6, 2008 to begin a planned refueling outage.

OPERATING DATA REPORT DOCKET: 336 PREPARER NAME: S. Claffey UNIT_NME: Millstone Unit 2 PREPARER TELEPHONE: 860-447-1791 x2456 RPT_PERIOD: 200805

1. Design Electrical Rating: 883.5

2. Maximum Dependable Capacity (MWe-Net) 877.7 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 257.90 2,562.23 193,410.06

4. Number of Hours Generator On-line 233.45 2,536.45 187,477.19

5. Reserve Shutdown Hours 0.00 0.00 468.20

6. Net Electrical energy Generated (MWHrs) 182,686.00 2,205,054.80 155,746,383.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008-2 5/22/2008 F 147.07 H 3 The main generator tripped off the line on May 22, 2008 at 1359 hours0.0157 days 0.378 hours 0.00225 weeks 5.170995e-4 months due to a lightning strike on the offsite power lines. The event also caused a reactor trip. The reactor was returned to critical on May 24, 2008 at 0707 hours0.00818 days 0.196 hours 0.00117 weeks 2.690135e-4 months . The reactor tripped May 24, 2008 at 0938 hours0.0109 days 0.261 hours 0.00155 weeks 3.56909e-4 months due to a loss of normal power (LNP) event. The LNP occurred when the supply breakers for both 4160 volt and 6900 volt buses from the Reserve Station Service Transformer (RSST) unexpectedly opened. A reactor trip signal was initiated on reactor coolant pump (RCP) low speed and low reactor coolant flow. The RSST to bus supply breaker trip was caused by a spurious primary audio tone trip signal, most likely generated from the 345KV switchyard. The reactor was returned to critical on May 28, 2008 at 0358 hours0.00414 days 0.0994 hours 5.919312e-4 weeks 1.36219e-4 months .

The main generator was phased to the grid on May 28, 2008 at 1703 hours0.0197 days 0.473 hours 0.00282 weeks 6.479915e-4 months .

2008- 4/6/2008 S 363.48 C 4 Major work activities are the refueling of the reactor 01 core and 10 year ISI core barrel inspection.

SUMMARY

Millstone Unit 2 restarted from a planned refueling outage on May 15, 2008. Cycle 19 initial criticality occurred on May 15, 2008 at 1838 hours0.0213 days 0.511 hours 0.00304 weeks 6.99359e-4 months .

The main generator was phased to the grid on May 16, 2008 at 0329 hours0.00381 days 0.0914 hours 5.439815e-4 weeks 1.251845e-4 months . The main generator tripped off the line on May 22, 2008 at 1359 hours0.0157 days 0.378 hours 0.00225 weeks 5.170995e-4 months due to a lightning strike on the offsite power lines. The event also caused a reactor trip. The reactor was returned to critical on May 24, 2008 at 0707 hours0.00818 days 0.196 hours 0.00117 weeks 2.690135e-4 months . The reactor tripped May 24, 2008 at 0938 hours0.0109 days 0.261 hours 0.00155 weeks 3.56909e-4 months due to a loss of normal power (LNP) event. The LNP occurred when the supply breakers for both 4160 volt and 6900 volt buses from the Reserve Station Service Transformer (RSST) unexpectedly opened. A reactor trip signal was initiated on reactor coolant pump (RCP) low speed and low reactor coolant flow. The RSST to bus supply breaker trip was caused by a spurious primary audio tone trip signal, most likely generated from the 345KV switchyard. The reactor was returned to critical on May 28, 2008 at 0358 hours0.00414 days 0.0994 hours 5.919312e-4 weeks 1.36219e-4 months . The main generator was phased to the grid on May 28, 2008 at 1703 hours0.0197 days 0.473 hours 0.00282 weeks 6.479915e-4 months . The unit reached 100% power May 29, 2008 at 1258 hours0.0146 days 0.349 hours 0.00208 weeks 4.78669e-4 months . The unit operated at or near 100% power for the remainder of May 2008.

OPERATING DATA REPORT DOCKET: 336 PREPARER NAME: S. Claffey UNIT_NME: Millstone Unit 2 PREPARER TELEPHONE: 860-447-1791 x2456 RPT_PERIOD: 200806

1. Design Electrical Rating: 883.5

2. Maximum Dependable Capacity (MWe-Net) 877.7 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 659.77 3,222.00 194,069.83

4. Number of Hours Generator On-line 659.77 3,196.22 188,136.96

5. Reserve Shutdown Hours 0.00 0.00 468.20

6. Net Electrical energy Generated (MWHrs) 579,563.40 2,784,618.20 156,325,946.70 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008-3 6/28/2008 F 60.23 A 2 At 1146 hours0.0133 days 0.318 hours 0.00189 weeks 4.36053e-4 months on June 28, 2008, the reactor was manually tripped due to the loss of main steam generator feedwater flow. Both steam generator feedwater pumps tripped on low suction pressure due to feedwater heater level oscillations during the performance of main turbine intercept valve testing.

Corrective actions include adjustments to the feedwater level control system and alignment of the "B" main feedwater pump.

SUMMARY

Millstone Unit 2 operated at or near 100% power from the beginning of the month until June 28, 2008. At 1146 hours0.0133 days 0.318 hours 0.00189 weeks 4.36053e-4 months on June 28, 2008, the reactor was manually tripped due to the loss of main steam generator feedwater flow. Both steam generator feedwater pumps tripped on low suction pressure due to feedwater heater level oscillations during the performance of main turbine intercept valve testing. The reactor was shutdown for the remainder of June 2008.

OPERATING DATA REPORT DOCKET: 423 PREPARER NAME: K. Cook UNIT_NME: Millstone Unit 3 PREPARER TELEPHONE: 860-447-1791 X6572 RPT_PERIOD: 200804

1. Design Electrical Rating: 1156.5

2. Maximum Dependable Capacity (MWe-Net) 1148 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 146,212.86

4. Number of Hours Generator On-line 720.00 2,903.00 144,316.68

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 824,195.00 3,332,602.30 159,762,349.90 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Millsone Unit 3 operated at or near 100% power for the month of April until April 5, 2008 at 0117 hours0.00135 days 0.0325 hours 1.934524e-4 weeks 4.45185e-5 months when the unit reduced load to approximately 88% power to shift from the "B" turbine driven main feedwater pump to the motor driven feed pump and also performed main turbine control valve testing. The plant was back at 100% power at 1615 hours0.0187 days 0.449 hours 0.00267 weeks 6.145075e-4 months and continued to operate at 100% for the remainder of the month.

OPERATING DATA REPORT DOCKET: 423 PREPARER NAME: K. Cook UNIT_NME: Millstone Unit 3 PREPARER TELEPHONE: 860-447-1791 X6572 RPT_PERIOD: 200805

1. Design Electrical Rating: 1156.5

2. Maximum Dependable Capacity (MWe-Net) 1148 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 146,956.86

4. Number of Hours Generator On-line 744.00 3,647.00 145,060.68

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 851,871.50 4,184,473.80 160,614,221.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Millstone Unit 3 operated at or near 100% power for the month of May, 2008.

OPERATING DATA REPORT DOCKET: 423 PREPARER NAME: K. Cook UNIT_NME: Millstone Unit 3 PREPARER TELEPHONE: 860-447-1791 X6572 RPT_PERIOD: 200806

1. Design Electrical Rating: 1156.5

2. Maximum Dependable Capacity (MWe-Net) 1148 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 147,676.86

4. Number of Hours Generator On-line 720.00 4,367.00 145,780.68

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 817,930.80 5,002,404.60 161,432,152.20 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Millstone Unit 3 operated at or near 100% power for the month of June until June 7, 2008 at 0952 hours0.011 days 0.264 hours 0.00157 weeks 3.62236e-4 months when the unit reduced load to approximately 92% power to repair the fourth point feedwater heater normal level control valve. The plant was returned to 100% power at 2254 hours0.0261 days 0.626 hours 0.00373 weeks 8.57647e-4 months the same day. On June 8, 2008 at 1235 hours0.0143 days 0.343 hours 0.00204 weeks 4.699175e-4 months , the unit reduced load to approximately 94% power to repair the "B" moisture separator reheater drain tank level control valve. The unit was back at 100% power on June 9, 2008 at 0147 hours0.0017 days 0.0408 hours 2.430556e-4 weeks 5.59335e-5 months . Millstone Unit 3 continued to run at or near 100% power for the remainder of June, 2008.

OPERATING DATA REPORT DOCKET: 263 PREPARER NAME: Jody Helland UNIT_NME: Monticello Unit 1 PREPARER TELEPHONE: 763-295-1333 RPT_PERIOD: 200804

1. Design Electrical Rating: 600

2. Maximum Dependable Capacity (MWe-Net) 578.1 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 272,547.20

4. Number of Hours Generator On-line 720.00 2,903.00 268,896.11

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 425,502.00 1,716,834.00 141,249,494.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated continuously during the month with no unplanned power reductions greater than or equal to 20% of rated thermal power.

OPERATING DATA REPORT DOCKET: 263 PREPARER NAME: Jody I Helland UNIT_NME: Monticello Unit 1 PREPARER TELEPHONE: 763-295-1333 RPT_PERIOD: 200805

1. Design Electrical Rating: 600

2. Maximum Dependable Capacity (MWe-Net) 578.1 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 273,291.20

4. Number of Hours Generator On-line 744.00 3,647.00 269,640.11

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 436,396.00 2,153,230.00 141,685,890.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated continuously during the month with no unplanned power reductions greater than or equal to 20% of rated thermal power.

OPERATING DATA REPORT DOCKET: 263 PREPARER NAME: Jody I Helland UNIT_NME: Monticello Unit 1 PREPARER TELEPHONE: 763-295-1333 RPT_PERIOD: 200806

1. Design Electrical Rating: 600

2. Maximum Dependable Capacity (MWe-Net) 578.1 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 274,011.20

4. Number of Hours Generator On-line 720.00 4,367.00 270,360.11

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 415,071.00 2,568,301.00 142,100,961.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated continuously during the month with no unplanned power reductions greater than or equal to 20% of rated thermal power.

OPERATING DATA REPORT DOCKET: 220 PREPARER NAME: Munyan UNIT_NME: Nine Mile Point Unit 1 PREPARER TELEPHONE: 3153491914 RPT_PERIOD: 200804

1. Design Electrical Rating: 613

2. Maximum Dependable Capacity (MWe-Net) 565 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 248,553.47

4. Number of Hours Generator On-line 720.00 2,903.00 243,694.04

5. Reserve Shutdown Hours 0.00 0.00 20.40

6. Net Electrical energy Generated (MWHrs) 450,776.83 1,819,618.23 137,790,769.51 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Nine Mile Point Unit #1 operated with an availability factor of 100% for the month of April 2008.

OPERATING DATA REPORT DOCKET: 220 PREPARER NAME: Munyan UNIT_NME: Nine Mile Point Unit 1 PREPARER TELEPHONE: 3153491914 RPT_PERIOD: 200805

1. Design Electrical Rating: 613

2. Maximum Dependable Capacity (MWe-Net) 565 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 249,297.47

4. Number of Hours Generator On-line 744.00 3,647.00 244,438.04

5. Reserve Shutdown Hours 0.00 0.00 20.40

6. Net Electrical energy Generated (MWHrs) 459,760.41 2,279,378.64 138,250,529.92 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Nine Mile Point Unit One operated with an availability factor of 100% for the month of May, 2008. On 5/3/2008 at 0805 hours0.00932 days 0.224 hours 0.00133 weeks 3.063025e-4 months Operations commenced a down power to approximately 68.1% for rod seqence exchange. After completion the unit was returned to rated power at 2250 5/3/08. On 5/13/2008 at 0806 hours0.00933 days 0.224 hours 0.00133 weeks 3.06683e-4 months operations commenced a down power to approximately 86.64% due to loss of off site power. After restoration of off site power unit was returned to rated power at 1430 5/13/08. On 5/21/2008 at 2300 hours0.0266 days 0.639 hours 0.0038 weeks 8.7515e-4 months Operations commenced a down power to approximately 87.38% for returning Reactor Recirc Motor Generator #15 to service. After starting of MG unit returned to rated power at 0021 5/22/08.

OPERATING DATA REPORT DOCKET: 220 PREPARER NAME: Munyan UNIT_NME: Nine Mile Point Unit 1 PREPARER TELEPHONE: 3153491914 RPT_PERIOD: 200806

1. Design Electrical Rating: 613

2. Maximum Dependable Capacity (MWe-Net) 565 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 250,017.47

4. Number of Hours Generator On-line 720.00 4,367.00 245,158.04

5. Reserve Shutdown Hours 0.00 0.00 20.40

6. Net Electrical energy Generated (MWHrs) 433,605.50 2,712,984.14 138,684,135.42 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 maintained a 100% availability factor for June 2008. Unit 1 commenced a planned downpower to approximately 96.1% at 2020 on 6/13/08 for Quarterly Turbine Testing. Unit 1 returned to rated power at 2200 6/13/08. Unit 1 commenced a planned downpower (per 99-02) to approximately 91.72% at 1400 on 6/22/08 to secure Reactor Recirc Motor Generator 15# for maintenance. Unit 1 returned to rated power at 1508 6/22/08 following completion of repairs. Unit 1 commenced a planned downpower (per 99-02) to approximately 85.81% at 1400 on 6/28/08 to restart Reactor Recirc Motor Generator 15# following maintenance. Unit 1 returned to rated power at 1509 6/28/08 following completion of repairs.

OPERATING DATA REPORT DOCKET: 410 PREPARER NAME: Munyan UNIT_NME: Nine Mile Point Unit 2 PREPARER TELEPHONE: 3153491914 RPT_PERIOD: 200804

1. Design Electrical Rating: 1143.3

2. Maximum Dependable Capacity (MWe-Net) 1119.8 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 353.43 2,298.15 146,635.24

4. Number of Hours Generator On-line 329.53 2,274.25 143,516.36

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 337,772.50 2,555,561.64 153,536,093.56 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments RFO1 3/22/2008 S 390.47 C 4 Shutdown for RFO11 commenced at 1900 1 3/21/2008, breaker opening occured 0143 3/22/08 and continued to be open through remainder of month. Generator was synchronized to the grid at 06:28 4/17/08. Turbine tripped during at 07:41 4/17/08. Turbine resequenced to the grid at 17:06 4/17/08.

SUMMARY

NMP Unit 2 went critical at 0634 on 4/16/08. Breaker closure occured at 0628 4/17/08. Turbine tripped 0741 4/17/08 due to control oil leakage.

Re-sequenced to grid at 1706 4/17/08. 100% power level was achieved at 09:15 4/19/08. On April 20, 2008 at 0039 hours4.513889e-4 days 0.0108 hours 6.448413e-5 weeks 1.48395e-5 months a planned power reduction to approximately 71.6% power was performed for control rod pattern adjustment. After completion of the rod pattern adjustment full power operation was restored at 15:47 hours on April 20, 2008.

OPERATING DATA REPORT DOCKET: 410 PREPARER NAME: Munyan UNIT_NME: Nine Mile Point Unit 2 PREPARER TELEPHONE: 3153491914 RPT_PERIOD: 200805

1. Design Electrical Rating: 1143.3

2. Maximum Dependable Capacity (MWe-Net) 1119.8 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,042.15 147,379.24

4. Number of Hours Generator On-line 744.00 3,018.25 144,260.36

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 845,828.57 3,401,390.21 154,381,922.13 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Nine Mile Point Unit #2 operated with an availability factor of 100% for the month of May 2008. Unit 2 commenced a planned downpower to approximately 68.61% at 0800 on 5/31/08 for sequence exchange and scram timing. Unit 2 returned to rated power at 0446 6/1/08.

OPERATING DATA REPORT DOCKET: 410 PREPARER NAME: Munyan UNIT_NME: Nine Mile Point Unit 2 PREPARER TELEPHONE: 3153491914 RPT_PERIOD: 200806

1. Design Electrical Rating: 1143.3

2. Maximum Dependable Capacity (MWe-Net) 1119.8 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,762.15 148,099.24

4. Number of Hours Generator On-line 720.00 3,738.25 144,980.36

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 808,238.20 4,209,628.41 155,190,160.33 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Nine Mile Point Unit #2 operated with an availability factor of 100% for the month of June 2008. Unit 2 commenced a planned downpower to approximately 68.61% at 0800 on 5/31/08 for sequence exchange and scram timing. Unit 2 returned to rated power at 0446 6/1/08. Unit 2 commenced an unplanned downpower to approximately 91.62% at 0320 on 6/15/08 due to failure of normal level control valve for 2FWS-E6B.

Unit 2 returned to rated power at 1320 6/15/08 following completion of repairs. Unit 2 commenced an unplanned downpower to approximately 78.48% at 1955 on 6/24/08 due to loss of feed heating in 2FWS-E6B from a failed level switch. Unit 2 returned to rated power at 1600 6/25/08 following completion of repairs.

OPERATING DATA REPORT DOCKET: 338 PREPARER NAME: W.C.Beasley UNIT_NME: North Anna Unit 1 PREPARER TELEPHONE: 540-894-2520 RPT_PERIOD: 200804

1. Design Electrical Rating: 913

2. Maximum Dependable Capacity (MWe-Net) 903 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 217,823.15

4. Number of Hours Generator On-line 720.00 2,903.00 214,381.24

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 659,998.48 2,659,017.36 186,030,915.98 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began the Month @100% power, 966 MWe. On 4-11-8 @ 2300 commence ramping down to support the performance of Turbine Valve Freedom Test (TVFT). On 4-11-8 @ 2356 Holding @ 91% power, 890 MWe for the performance of TVFT. On 4-12-8 @ 0022 TVFT completed satisfactory. Commence power increase to 100%. On 4-12-8 @ 0212 unit is at 100% power, 952 MWe. Ended the Month @ 100% power, 967 MWe.

OPERATING DATA REPORT DOCKET: 338 PREPARER NAME: W.C.Beasley UNIT_NME: North Anna Unit 1 PREPARER TELEPHONE: 540-894-2520 RPT_PERIOD: 200805

1. Design Electrical Rating: 913

2. Maximum Dependable Capacity (MWe-Net) 903 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 218,567.15

4. Number of Hours Generator On-line 744.00 3,647.00 215,125.24

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 680,321.37 3,339,338.73 186,711,237.35 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began the Month @ 100% Power, 967 MWe. Ended the Month @ 100% Power, 966 MWe.

OPERATING DATA REPORT DOCKET: 338 PREPARER NAME: W.C.Beasley UNIT_NME: North Anna Unit 1 PREPARER TELEPHONE: 540-894-2520 RPT_PERIOD: 200806

1. Design Electrical Rating: 913

2. Maximum Dependable Capacity (MWe-Net) 903 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 219,287.15

4. Number of Hours Generator On-line 720.00 4,367.00 215,845.24

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 653,717.22 3,993,055.95 187,364,954.57 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began the Month @ 100% Power, 966 MWe. Ended the Month @ 100% Power, 958 MWe.

OPERATING DATA REPORT DOCKET: 339 PREPARER NAME: W.C.Beasley UNIT_NME: North Anna Unit 2 PREPARER TELEPHONE: 540-894-2520 RPT_PERIOD: 200804

1. Design Electrical Rating: 913

2. Maximum Dependable Capacity (MWe-Net) 903 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,702.92 206,650.25

4. Number of Hours Generator On-line 720.00 2,694.63 205,132.69

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 656,688.53 2,437,872.11 179,408,086.08 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began the Month @ 100% Power, 961 MWe. Ended the Month @ 100% Power, 966 MWe.

OPERATING DATA REPORT DOCKET: 339 PREPARER NAME: W.C.Beasley UNIT_NME: North Anna Unit 2 PREPARER TELEPHONE: 540-894-2520 RPT_PERIOD: 200805

1. Design Electrical Rating: 913

2. Maximum Dependable Capacity (MWe-Net) 903 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,446.92 207,394.25

4. Number of Hours Generator On-line 744.00 3,438.63 205,876.69

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 677,570.55 3,115,442.66 180,085,656.63 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began the Month @ 100% Power, 966 MWe. On 5-8-08 @ 1207, 2-SD-P-1C tripped on low level (945 MWe). Ended the Month @ 100% Power, 960 MWe.

OPERATING DATA REPORT DOCKET: 339 PREPARER NAME: W.C.Beasley UNIT_NME: North Anna Unit 2 PREPARER TELEPHONE: 540-894-2520 RPT_PERIOD: 200806

1. Design Electrical Rating: 913

2. Maximum Dependable Capacity (MWe-Net) 903 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,166.92 208,114.25

4. Number of Hours Generator On-line 720.00 4,158.63 206,596.69

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 650,412.68 3,765,855.34 180,736,069.31 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began the Month @ 100% Power, 960 MWe. Ended the Month @ 100% Power, 956 MWe.

OPERATING DATA REPORT DOCKET: 269 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 1 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200804

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 265.37 2,448.37 244,503.99

4. Number of Hours Generator On-line 264.02 2,447.02 240,672.56

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 164,345.00 1,878,742.00 197,153,058.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 3 4/12/2008 S 455.98 C 1 O1EOC24 Refueling Outage

SUMMARY

Unit One was at 73% Power at the beginning of April, 2008 due to the unit operating with only three Reactor Coolant Pumps. On 4/11/08, at 20:18 Reactor Power was decreased from 73% FP per OP/1/A/1102/004 (Operations at Power) for the Unit 1 Shutdown at the End of Cycle (EOC) 24.

The Reactor Power decrease was stopped at 18% FP per OP/1/A/1102/004 in order to place the Unit 1 turbine offline at 23:08. The Unit 1 Turbine was placed off-line per OP/1/A/1106/001 (Turbine Generator) on 4/12/08 at 00:01. The Reactor Power decrease was resumed from 18% FP per OP/1/A/1102/010 at 00:46. The Unit 2 reactor was tripped from 2.48% FP per OP/1/A/1102/010 at 01:22.

OPERATING DATA REPORT DOCKET: 269 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 1 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200805

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 17.83 2,466.20 244,521.82

4. Number of Hours Generator On-line 0.00 2,447.02 240,672.56

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.00 1,878,742.00 197,153,058.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 3 4/12/2008 S 744.00 C 4 O1EOC24 Refueling Outage

SUMMARY

Unit 1 was at 0% FP at the beginning of May due to the O1EOC24 refueling outage. On 5/31/08 at 06:10, the Unit 1 reactor was made critical per PT/0/A/0711/001(Zero Power Physics Test). Began Reactor Power increase from 0% Full Power (FP) per OP/1/A/1102/001(Controlling Procedure for Unit Startup) at 17:38. The Reactor Power increase was stopped at 3% FP per OP/1/A/1102/001 in order to place the ICS in automatic at 18:05. Began Reactor Power increase from 3% FP per OP/1/A/1102/001 at 19:47. The Reactor Power increase was stopped at 6% FP per OP/1/A/1102/001 to allow operator training at 19:58. Began Reactor Power increase from 6% FP per OP/1/A/1102/001at 20:12. The Reactor Power increase was stopped at 12% FP per OP/1/A/1102/001 to allow operator training at 20:34. Began Reactor Power increase from 12% FP per OP/1/A/1102/001 at 20:46. The Reactor Power increase was stopped at 18.4% FP per OP/1/A/1102/001 to allow operator training at 21:10.

Began Reactor Power increase from 18.4% FP per OP/1/A/1102/001 at 21:23. The Reactor Power increase was stopped at 19.5% FP per OP/1/A/1102/001 and lowered so not to go above 20% FP prior to performing PT/0/A/0302/006 to verify that the incore detectors are operable at 21:34. The Reactor Power decrease was stopped at 19.1% FP per OP/1/A/1102/001 to place the Unit 1 turbine on line at 21:42.

Unit 1 was still in the O1EOC24 outage at the end of May, 2008

OPERATING DATA REPORT DOCKET: 269 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 1 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200806

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,186.20 245,241.82

4. Number of Hours Generator On-line 700.55 3,147.57 241,373.11

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 578,828.00 2,457,570.00 197,731,886.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 3 4/12/2008 S 18.48 C 4 O1EOC24 Refueling Outage 1 6/2/2008 S 0.97 B 5 The Unit 1 turbine is taken off line to perform over speed trip testing following the O1C25 refueling outage

SUMMARY

Unit One was at 19% FP during O1C25 startup at the beginning of June, 2008. Major delays impacting the U1EOC24 refueling outage includes Reactor Coolant Pump seal work affecting the fill of the Reactor Coolant System following the unit shutdown (71 hours8.217593e-4 days 0.0197 hours 1.173942e-4 weeks 2.70155e-5 months ) and the development, implementation, and repair of RCP seal modification packages (328 hours0.0038 days 0.0911 hours 5.42328e-4 weeks 1.24804e-4 months ). The total delay time incurred during the O1EOC24 refueling outage, including all other miscellaneous time delays totals 548 hours0.00634 days 0.152 hours 9.060847e-4 weeks 2.08514e-4 months .

On 6/01/08 at 01:09, Reactor Power was decreased from 19% FP to 18% FP as the Steam Generator Master and Reactor Master ICS control stations tripped to hand. Reactor power was stabilized at 18.2% with the ICS in automatic. Began Reactor Power increase from 18.2% Full Power (FP) per OP/1/A/1102/001(Controlling Procedure for Unit Startup) at 10:24. The Reactor Power increase was stopped at 19.5% FP per OP/1/A/1102/001 in order to perform an NI calibration at 10:35. Reactor Power stabilized at 19.3% FP. The Unit 1 turbine was placed on-line per OP/1/A/1106/001 at 18:29.

On 6/02/08 at 04:27, the Reactor Power increase resumed from 19.3% FP per OP/1/A/1102/001. The Reactor Power increase was stopped at 22% FP to perform enclosure 4.21 (Unit Startup from Mode 1) of OP/1/A/1102/001at 04:49. Began Reactor Power increase from 22% FP per OP/1/A/1102/001at 04:56. The Reactor Power increase was stopped at 30% FP per OP/1/A/1102/004 and for Let Down Storage Tank Makeup at 05:23. Began Reactor Power increase from 30% FP per OP/1/A/1102/004 (Operation at Power) at 10:29. The Reactor Power increase was stopped at 40% FP per OP/1/A/1102/004 to perform a Steam extraction Check Valve 40% Core Thermal Power test per PT/1/A/0290/012 at 11:35. Began Reactor Power increase from 40% FP per OP/1/A/1102/004 at 12:49.

The Reactor Power increase was stopped at approximately 45% FP per OP/1/A/1102/004 for Let Down Storage Tank Makeup and to start the second CBP at 13:18. Began Reactor Power increase from ~45% FP per OP/1/A/1102/004 at 14:08. The Reactor Power increase was stopped at 50% FP per OP/1/A/1102/004 to change the rate of power escalation at 14:34. Began Reactor Power increase from 50% FP per OP/1/A/1102/004 at 15:17. The Reactor Power increase was stopped at ~53.5% FP per OP/1/A/1102/004 for LDST makeup at 16:05. Reactor Power stabilized at 53.87% FP. Began Reactor Power increase from 53.87% FP per OP/1/A/1102/004 at 16:20. The Reactor Power increase was stopped at ~58% FP per OP/1/A/1102/004 for LDST makeup at 17:21.

Began Reactor Power increase from 58% FP per OP/1/A/1102/004 at 17:42. The Reactor Power increase was stopped at 60% FP per OP/1/A/1102/004 for Reactor Coolant System (RCS) deboration at 18:03. Began Reactor Power increase from 60% FP per OP/1/A/1102/004 at 18:30. The Reactor Power increase was stopped at 61% FP per OP/1/A/1102/004 for RCS deboration at 19:00.

Began Reactor Power increase from 61% FP per OP/1/A/1102/004 at 19:12. The Reactor Power increase was stopped at 70% FP per OP/1/A/1102/004 in order to position group 8 Axial Power Shaping Rods for PIDC testing at 20:58. Began Reactor Power increase from 70% FP per OP/1/A/1102/004 at 21:16. The Reactor Power increase was stopped at 73% FP per OP/1/A/1102/004 in order to perform PIDC testing at 21:56.

Began Reactor Power increase from 73% FP per OP/1/A/1102/004 at 17:36 on 6/3/08. The Reactor Power increase was stopped at 89.5% FP per OP/1/A/1102/004 in order to change the power escalation rate and to evaluate the need for an NI calibration at 21:29.

Began Reactor Power increase from 89.5% FP per OP/1/A/1102/004 at 22:06.

The Reactor Power increase was stopped at 97% FP per OP/1/A/1102/004 to perform an NI calibration at 01:09 on 06/04/08.

Began Reactor Power increase from 97% FP per OP/1/A/1102/004 at 04:12. The Reactor Power increase was stopped at 99.5% FP for a slow approach to 100% FP per OP/1/A/1102/004 at 05:10. Began Reactor Power increase from 99.5% FP per OP/1/A/1102/004 at 05:26. Unit 1 Reactor Power reached 100% FP and stabilized at 06:45.

OPERATING DATA REPORT DOCKET: 270 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 2 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200804

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 693.22 2,866.09 243,925.59

4. Number of Hours Generator On-line 680.10 2,852.97 241,013.94

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 583,085.00 2,484,169.00 197,288,511.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 3/31/2008 F 39.90 A 4 The Unit 2 Turbine Trip originated from calibration of the condenser pressure transmitter which caused a loss of vacuum on the impulse line common to the Turbine Trip switches. The trip of the Unit 2 Turbine actuated an automatic reactor scram.

SUMMARY

Unit Two was at 0% power at the beginning of April, 2008 due to a reactor trip that occurred on 3/31/08. On 4/02/08 at 02:47, the Unit 2 reactor became critical. Began Reactor Power increase from 0% Full Power (FP) per OP/2/A/1102/001(Controlling Procedure for Unit Startup) at 02:58.

The Reactor Power increase was stopped at 19.6% FP in order to place the Unit 2 turbine online per OP/2/A/1102/001 at 05:17. The Unit 2 turbine was placed on-line at 15:54. Began Reactor Power increase from 19.6% FP per OP/2/A/1102/001 at 16:45. The Reactor Power increase was stopped at 26% FP in order to complete an extraction valve alignment at 17:22. Began Reactor Power increase from 26% FP per OP/2/A/1102/001 at 20:45. The Reactor Power increase was stopped at 40% FP per OP/2/A/1102/004 (Operation at Power) in order to complete a steam extraction check valve test per PT/2/A/0290/012 and to start the 2B condensate booster pump at 21:56. Began Reactor Power increase from 40% FP per OP/2/A/1102/004 at 22:15. The Reactor Power increase was stopped at 58% FP due to the unavailability of the standby condensate booster pump at 23:45.

On 4/03/08 at 09:39, Reactor Power was increased from 58% FP per OP/2/A/1102/004. The Reactor Power increase was stopped at 61.5% FP due to an unexpected response with 2A Main Steam Drain Tank level at 09:54.

Began Reactor Power increase from 61.5% FP per OP/2/A/1102/004 at 10:39. The Reactor Power increase was stopped at 90% FP per OP/2/A/1102/004 to evaluate the need for an NI calibration at 13:02. Began Reactor Power increase from 90% FP per OP/2/A/1102/004 at 16:58.

The Reactor Power increase was stopped at 99.5% FP per OP/2/A/1102/004 for a slow approach to 100% FP at 18:33. Began Reactor Power increase from 99.5% FP per OP/2/A/1102/004 at 19:05. The Power escalation was completed with Unit 2 Reactor Power at 100% FP at 19:07.

OPERATING DATA REPORT DOCKET: 270 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 2 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200805

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,610.09 244,669.59

4. Number of Hours Generator On-line 744.00 3,596.97 241,757.94

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 643,825.00 3,127,994.00 197,932,336.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 270 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 2 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200806

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,330.09 245,389.59

4. Number of Hours Generator On-line 720.00 4,316.97 242,477.94

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 623,299.00 3,751,293.00 198,555,635.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 287 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 3 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200804

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 236,203.93

4. Number of Hours Generator On-line 720.00 2,903.00 233,178.40

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 631,889.00 2,546,947.00 193,923,770.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 287 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 3 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200805

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 236,947.93

4. Number of Hours Generator On-line 744.00 3,647.00 233,922.40

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 651,664.00 3,198,611.00 194,575,434.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 287 PREPARER NAME: Judy Smith UNIT_NME: Oconee Unit 3 PREPARER TELEPHONE: 864-885-4309 RPT_PERIOD: 200806

1. Design Electrical Rating: 886

2. Maximum Dependable Capacity (MWe-Net) 846 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 237,667.93

4. Number of Hours Generator On-line 720.00 4,367.00 234,642.40

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 627,213.00 3,825,824.00 195,202,647.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 219 PREPARER NAME: Roger B. Gayley UNIT_NME: Oyster Creek Unit 1 PREPARER TELEPHONE: (609) 971-4406 RPT_PERIOD: 200804

1. Design Electrical Rating: 650

2. Maximum Dependable Capacity (MWe-Net) 619 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 656.67 2,839.67 254,406.03

4. Number of Hours Generator On-line 641.78 2,824.78 249,914.90

5. Reserve Shutdown Hours 0.00 0.00 918.20

6. Net Electrical energy Generated (MWHrs) 356,828.00 1,603,697.00 143,942,796.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1M16 4/26/2008 S 78.22 B 2 1M16 was taken to repair the turbine controls so that full power operation could resume. Also to verify oil level in the 'B' recirc pump to prove the alarm was valid.

SUMMARY

Planned Maintenance Outage (1M16) 4/26/08 00:00 to 4/29//08 06:13.

OPERATING DATA REPORT DOCKET: 219 PREPARER NAME: Roger Gayley UNIT_NME: Oyster Creek Unit 1 PREPARER TELEPHONE: (609) 971-4406 RPT_PERIOD: 200805

1. Design Electrical Rating: 650

2. Maximum Dependable Capacity (MWe-Net) 619 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,583.67 255,150.03

4. Number of Hours Generator On-line 744.00 3,568.78 250,658.90

5. Reserve Shutdown Hours 0.00 0.00 918.20

6. Net Electrical energy Generated (MWHrs) 459,296.00 2,062,993.00 144,402,092.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

A planned power reduction was performed for Core Spray surveillance and a planned CRD scram test and an unplanned power reduction was performed to address failure of a condenser backwash valve to fully open.

OPERATING DATA REPORT DOCKET: 219 PREPARER NAME: Roger B. Gayley UNIT_NME: Oyster Creek Unit 1 PREPARER TELEPHONE: (609) 971-4406 RPT_PERIOD: 200806

1. Design Electrical Rating: 650

2. Maximum Dependable Capacity (MWe-Net) 619 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,303.67 255,870.03

4. Number of Hours Generator On-line 720.00 4,288.78 251,378.90

5. Reserve Shutdown Hours 0.00 0.00 918.20

6. Net Electrical energy Generated (MWHrs) 434,294.00 2,497,287.00 144,836,386.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

A planned power reduction was performed for core adjustments. An unplanned power reduction was performed to address turbine control valve oscillations that occurred during turbine control valve testing.

OPERATING DATA REPORT DOCKET: 255 PREPARER NAME: GT Wiggins UNIT_NME: Palisades Unit 1 PREPARER TELEPHONE: (269) 764-2497 RPT_PERIOD: 200804

1. Design Electrical Rating: 805

2. Maximum Dependable Capacity (MWe-Net) 730 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,868.20 211,187.19

4. Number of Hours Generator On-line 720.00 2,861.20 205,292.98

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 579,785.98 2,297,527.98 144,258,349.16 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Palisades operated the entire month of April 2008 at essentially full power.

OPERATING DATA REPORT DOCKET: 255 PREPARER NAME: Tyler DiLeo UNIT_NME: Palisades Unit 1 PREPARER TELEPHONE: 2697642194 RPT_PERIOD: 200805

1. Design Electrical Rating: 805

2. Maximum Dependable Capacity (MWe-Net) 730 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 718.08 3,586.28 211,905.27

4. Number of Hours Generator On-line 706.53 3,567.73 205,999.51

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 556,358.31 2,853,886.29 144,814,707.47 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2 5/23/2008 F 37.47 A 3 Palisades tripped from full power at 1249, Friday, May 23rd, as a result of a generator protective relay actuation. This caused a loss of load signal to be received in the control room, tripping the reactor and turbine generator. Generator Negative Phase Sequence Relay (346 Relay) actuated without a valid input signal and was determined to be faulty by Electrical Maintenance. All rods inserted into the reactor as designed. All safety systems operated as designed.

SUMMARY

Palisades operated from the beginning of the month at essentially full power. On 05/23/2008 at 12:49 the reactor automatically tripped from full power. The cause of the trip was a loss of load signal supplied by a failed Generator Negative Phase Sequence Relay. Criticality following the trip was on 05/24/2008 at 14:45 with generator sychronization occurring on 05/25/2008 at 02:17. Full power was achieved on 05/26/2008 at 01:50 and was maintained for the remainder of the month.

OPERATING DATA REPORT DOCKET: 255 PREPARER NAME: TH Woody UNIT_NME: Palisades Unit 1 PREPARER TELEPHONE: 269-764-2707 RPT_PERIOD: 200806

1. Design Electrical Rating: 805

2. Maximum Dependable Capacity (MWe-Net) 730 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,306.28 212,625.27

4. Number of Hours Generator On-line 720.00 4,287.73 206,719.51

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 567,071.00 3,420,957.29 145,381,778.47 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Palisades operated at essentially full power for the entire reporting period.

OPERATING DATA REPORT DOCKET: 528 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 1 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200804

1. Design Electrical Rating: 1333

2. Maximum Dependable Capacity (MWe-Net) 1311 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,904.00 152,035.43

4. Number of Hours Generator On-line 720.00 2,904.00 150,289.39

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 950,539.32 3,847,908.49 180,261,066.71 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began month in Mode 1: RX power at full power. Ended month in Mode 1: RX power at full power.

OPERATING DATA REPORT DOCKET: 528 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 1 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200805

1. Design Electrical Rating: 1333

2. Maximum Dependable Capacity (MWe-Net) 1311 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,648.00 152,779.43

4. Number of Hours Generator On-line 744.00 3,648.00 151,033.39

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 984,719.79 4,832,628.28 181,245,786.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began month in Mode 1: RX power at full power. Ended month in Mode 1: RX power at full power.

OPERATING DATA REPORT DOCKET: 528 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 1 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200806

1. Design Electrical Rating: 1333

2. Maximum Dependable Capacity (MWe-Net) 1311 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 667.08 4,315.08 153,446.51

4. Number of Hours Generator On-line 652.05 4,300.05 151,685.44

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 834,818.72 5,667,447.00 182,080,605.22 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-01 6/6/2008 F 67.95 A 1 The unit was downpowered and manually shutdown due to 1A safety injection tank nitrogen leak.

SUMMARY

The unit began the month in Mode 1 with the reactor at full power. On June 5th at 2356 the unit commenced a RX downpower due to a nitrogen leak on 1A safety injection tank (SIT) and manually shutdown the reactor on June 6th at 0148. Repairs were completed and the unit entered Mode 2 on June 8th at 0601, went critical at 0643, entered Mode 1 at 1300 and was synchronized to the grid at 2145. The unit reach full power on June 10th at 0524. The unit ended the month in Mode 1 with the reactor at full power.

OPERATING DATA REPORT DOCKET: 529 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 2 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200804

1. Design Electrical Rating: 1336

2. Maximum Dependable Capacity (MWe-Net) 1314 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 0.00 2,112.00 154,497.61

4. Number of Hours Generator On-line 0.00 2,112.00 152,849.39

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.00 2,828,429.01 189,071,587.51 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-01 3/29/2008 S 720.00 C 4 Manually tripped the RX from 24% power to commence U2R14.

SUMMARY

Began month in Mode 5 in a continuation of the 14th refueling outage. The unit entered Mode 6 on April 3rd. Core offload began on April 7th and it was completed on April 9th. Ended the month with the RX defueled.

OPERATING DATA REPORT DOCKET: 529 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 2 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200805

1. Design Electrical Rating: 1336

2. Maximum Dependable Capacity (MWe-Net) 1314 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 39.70 2,151.70 154,537.31

4. Number of Hours Generator On-line 0.00 2,112.00 152,849.39

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.00 2,828,429.01 189,071,587.51 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-01 3/29/2008 S 744.00 C 4 Manually tripped the RX from 24% power to commence U2R14.

SUMMARY

Began month with the RX defueled in 14th refueling outage. The unit entered Mode 6 on May 8th, Mode 5 on May 14th, Mode 4 on May 22nd, and Mode 3 on May 23rd. On May 28th the unit entered Mode 2, went critical at 1139 but was manually tripped at 2134 following the unexpected drop of four control element assemblies during low power physics testing. The unit re-entered Mode 2 on May 30th and went critical at 1813. The unit entered Mode 1 on May 31st and reached 12% RX power at 2102. Ended month in Mode 1: RX power at 12%.

OPERATING DATA REPORT DOCKET: 529 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 2 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200806

1. Design Electrical Rating: 1336

2. Maximum Dependable Capacity (MWe-Net) 1314 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 647.92 2,799.62 155,185.23

4. Number of Hours Generator On-line 612.00 2,724.00 153,461.39

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 713,824.64 3,542,253.65 189,785,412.15 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-01 3/29/2008 S 105.83 C 4 Manually tripped the RX from 24% power to commence U2R14.

08-02 6/5/2008 S 2.17 B 5 Tripped the main turbine for overspeed testing.

SUMMARY

The unit began the month in Mode 1 with the reactor at 12% power in an extension of the 14th refueling outage. On June 1st at 1707 the reactor was manually shutdown to make repairs on the main turbine mechanical overspeed trip mechanism. On June 4th at 1630 the unit entered Mode 2 and went critical at 1712. On June 5th at 0145 the unit entered Mode 1, was synchronized to the grid at 0950, and the turbine was tripped at 1512 for planned overspeed testing. The unit was re-synchronized to the grid at 1722 after successful completion of the overspeed test. The unit reached full power on June 9 at 1130 and ended the month in Mode 1 with the reactor at full power.

OPERATING DATA REPORT DOCKET: 530 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 3 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200804

1. Design Electrical Rating: 1339

2. Maximum Dependable Capacity (MWe-Net) 1317 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,558.28 148,515.93

4. Number of Hours Generator On-line 720.00 2,476.13 147,122.81

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 957,680.91 3,176,881.94 179,955,552.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began month in Mode 1: RX power at full power. Ended month in Mode 1: RX power at full power.

OPERATING DATA REPORT DOCKET: 530 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 3 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200805

1. Design Electrical Rating: 1339

2. Maximum Dependable Capacity (MWe-Net) 1317 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,302.28 149,259.93

4. Number of Hours Generator On-line 744.00 3,220.13 147,866.81

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 986,139.28 4,163,021.22 180,941,691.68 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began month in Mode 1: RX power at full power. Ended month in Mode 1: RX power at full power.

OPERATING DATA REPORT DOCKET: 530 PREPARER NAME: Kevin Sweeney UNIT_NME: Palo Verde Unit 3 PREPARER TELEPHONE: 623-393-5049 RPT_PERIOD: 200806

1. Design Electrical Rating: 1339

2. Maximum Dependable Capacity (MWe-Net) 1317 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,022.28 149,979.93

4. Number of Hours Generator On-line 720.00 3,940.13 148,586.81

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 950,615.44 5,113,636.66 181,892,307.12 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Began month in Mode 1: RX power at full power. Ended month in Mode 1: RX power at full power.

OPERATING DATA REPORT DOCKET: 277 PREPARER NAME: Dana Supplee UNIT_NME: Peach Bottom Unit 2 PREPARER TELEPHONE: (717) 456-4014 RPT_PERIOD: 200804

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1112 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 226,395.91

4. Number of Hours Generator On-line 720.00 2,903.00 221,779.03

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 819,253.60 3,312,084.80 223,963,378.90 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month of April at 100% of maximum allowable power (3514 MWth).

At 23:01 on April 4th, Unit 2 commenced a planned load reduction to 79.6% for Main Turbine Valve testing and Rod Sequence Exchange. Min power level was reached on April 5th at 01:02. The unit returned to full power at 18:05 on April 5th.

At 23:07 on April 28th, Unit 2 commenced a planned load reduction to 97.0% for HCU Maintenance rod insertion. Min power level was reached on April 28th at 23:35. The unit returned to full power at 00:14 on April 29th.

Unit 2 accrued 846 Mwe-hrs of forced losses during the month of April 2008 due to condenser waterbox fouling.

Unit 2 ended the month of April at 100% of maximum allowable power (3514 MWth).

OPERATING DATA REPORT DOCKET: 277 PREPARER NAME: Dana Supplee UNIT_NME: Peach Bottom Unit 2 PREPARER TELEPHONE: (717) 456-4014 RPT_PERIOD: 200805

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1112 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 227,139.91

4. Number of Hours Generator On-line 744.00 3,647.00 222,523.03

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 835,012.10 4,147,096.90 224,798,391.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month of May at 100% of maximum allowable power (3514 MWth).

At 23:01 on May 2nd, Unit 2 commenced a planned load reduction to 56.1% for Summer Readiness prep activities and waterbox cleaning. Min power level was reached on May 3rd at 05:21. The unit returned to full power at 18:46 on May 4th.

At 00:01 on May 10th, Unit 2 commenced a planned load reduction to 74.1% for follow up Rod Pattern Adjustment. Min power level was reached on May 10th at 02:03. The unit returned to full power at 23:13 on May 10th.

Unit 2 ended the month of May at 100% of maximum allowable power (3514 MWth).

OPERATING DATA REPORT DOCKET: 277 PREPARER NAME: Dana Supplee UNIT_NME: Peach Bottom Unit 2 PREPARER TELEPHONE: 717-456-4014 RPT_PERIOD: 200806

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1112 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 227,859.91

4. Number of Hours Generator On-line 720.00 4,367.00 223,243.03

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 804,510.20 4,951,607.10 225,602,901.20 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 began the month of June at 100% of maximum allowable power (3514 MWth).

At 23:04 on June 7th, Unit 2 commenced a planned load reduction to 92.0% for Main Turbine valve testing. Min power level was reached on June 7th at 23:49. The unit returned to full power at 00:57 on June 8th.

At 00:42 on June 19th, Unit 2 Recirculation pump speed was maximized. Unit 2 began to drift below 100% Core Thermal Power on the 20th at 03:49. Unplanned power losses were experienced until a minimum power level of 99.3% was reached on June 21st at 23:01. At which time, Unit 2 entered a planned load reduction.

At 23:02 on June 21st, Unit 2 commenced a planned load reduction to 64.8% for Rod Pattern Adjustment. Min power level was reached on June 21st at 23:52. The unit returned to full power at 22:04 on June 22nd.

Unit 2 ended the month of June at 100% of maximum allowable power (3514 MWth).

OPERATING DATA REPORT DOCKET: 278 PREPARER NAME: Dana Supplee UNIT_NME: Peach Bottom Unit 3 PREPARER TELEPHONE: (717) 456-4014 RPT_PERIOD: 200804

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1112 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,866.85 225,107.07

4. Number of Hours Generator On-line 720.00 2,848.58 221,025.61

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 820,785.60 3,199,316.80 222,048,076.90 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There were no planned or unplanned load reductions on Unit 3 during the month of April 2008.

OPERATING DATA REPORT DOCKET: 278 PREPARER NAME: Dana Supplee UNIT_NME: Peach Bottom Unit 3 PREPARER TELEPHONE: (717) 456-4014 RPT_PERIOD: 200805

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1112 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,610.85 225,851.07

4. Number of Hours Generator On-line 744.00 3,592.58 221,769.61

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 836,821.10 4,036,137.90 222,884,898.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 3 began the month of May at 100% of maximum allowable power (3514 MWth).

At 23:01 on May 12th, Unit 3 commenced a planned load reduction to 88.3% for insertion of HCU maintenance rods. Min power level was reached on May 12th at 23:35. The unit returned to full power at 03:27 on May 13th.

At 22:59 on May 23rd, Unit 3 commenced a planned load reduction to 51.7% for Summer Readiness prep activities and waterbox cleaning. Min power level was reached on May 24th at 00:51. The unit returned to full power at 19:33 on May 24th.

At 22:01 on May 24th, Unit 3 commenced an unplanned load reduction to 92.8% for Turbine Control Valve Testing. Min power level was reached on May 25th at 05:07. The unit returned to full power at 09:10 on May 25th.

At 23:02 on May 28th, Unit 3 began to accrue unplanned (forced) losses for a follow up Rod Pattern Adjustment and Offgas System leak repair load reduction to 71.1%. Min power level was reached on May 29th at 00:05. The unit returned to full power at 07:42 on May 29th.

Unit 3 ended the month of May at 100.00% of maximum allowable power (3514 MWth).

OPERATING DATA REPORT DOCKET: 278 PREPARER NAME: Dana Supplee UNIT_NME: Peach Bottom Unit 3 PREPARER TELEPHONE: 717-456-4014 RPT_PERIOD: 200806

1. Design Electrical Rating: 1138

2. Maximum Dependable Capacity (MWe-Net) 1112 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,330.85 226,571.07

4. Number of Hours Generator On-line 720.00 4,312.58 222,489.61

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 811,521.20 4,847,659.10 223,696,419.20 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 3 began the month of June at 100% of maximum allowable power (3514 MWth).

At 17:44 on June 15th, Unit 3 commenced an unplanned load reduction to 98.0% for elevated 3B Recirculating pump seal temperature. Min power level was reached on June 15th at 19:40. The unit returned to full power at 00:10 on June 16th.

Unit 3 ended the month of June at 100.00% of maximum allowable power (3514 MWth).

OPERATING DATA REPORT DOCKET: 440 PREPARER NAME: Glenn Mitchell UNIT_NME: Perry Unit 1 PREPARER TELEPHONE: 330-384-5027 RPT_PERIOD: 200804

1. Design Electrical Rating: 1273

2. Maximum Dependable Capacity (MWe-Net) 1245 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 536.90 2,719.90 145,414.66

4. Number of Hours Generator On-line 516.23 2,699.23 142,181.48

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 598,093.10 3,327,692.70 164,883,145.80 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 4/4/2008 S 203.77 B 1 The unit was taken off-line for a planned outage to repair the hotwell pump discharge valve and complete other maintenance to ensure reliability during the summer generation season.

SUMMARY

The unit was taken off-line for a planned outage to repair the hotwell pump discharge valve and complete other maintenance to ensure reliability during the summer generation season.

OPERATING DATA REPORT DOCKET: 440 PREPARER NAME: Glenn Mitchell UNIT_NME: Perry Unit 1 PREPARER TELEPHONE: 330-384-5027 RPT_PERIOD: 200805

1. Design Electrical Rating: 1273

2. Maximum Dependable Capacity (MWe-Net) 1245 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,463.90 146,158.66

4. Number of Hours Generator On-line 744.00 3,443.23 142,925.48

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 940,362.30 4,268,055.00 165,823,508.10 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at full power for the month of May except for a planned downpower for turbine valve testing.

OPERATING DATA REPORT DOCKET: 440 PREPARER NAME: Lawrence Criscione UNIT_NME: Perry Unit 1 PREPARER TELEPHONE: 330-384-4693 RPT_PERIOD: 200806

1. Design Electrical Rating: 1273

2. Maximum Dependable Capacity (MWe-Net) 1245 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,183.90 146,878.66

4. Number of Hours Generator On-line 720.00 4,163.23 143,645.48

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 880,150.00 5,148,205.00 166,703,658.10 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit derated 4 times due to higher than normal weather conditions in June. The cooling tower was operating at its design limits. The unit also downpowered to 59% power for a control rod pattern adjustment.

OPERATING DATA REPORT DOCKET: 293 PREPARER NAME: Mary J. Gatslick UNIT_NME: Pilgrim Unit 1 PREPARER TELEPHONE: 508-830-8373 RPT_PERIOD: 200804

1. Design Electrical Rating: 690

2. Maximum Dependable Capacity (MWe-Net) 684.7 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 686.80 2,869.80 226,571.90

4. Number of Hours Generator On-line 673.50 2,856.50 224,152.27

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 448,711.02 1,949,452.85 135,964,442.17 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008- 4/5/2008 S 46.50 B 1 01 On 4/04/2008 at 2000 hours0.0231 days 0.556 hours 0.00331 weeks 7.61e-4 months , a planned manual shutdown to replace the pilot valve associated with Safety Relief Valve 3C took place. The reactor was taken critical at 1802 hours0.0209 days 0.501 hours 0.00298 weeks 6.85661e-4 months on 4/06/2008, and synchronized to the grid at 0557 hours0.00645 days 0.155 hours 9.209656e-4 weeks 2.119385e-4 months on 4/07/2008, and 100% reactor power (2028 MWt) was achieved at 0644 hours0.00745 days 0.179 hours 0.00106 weeks 2.45042e-4 months on 4/08/2008.

SUMMARY

The unit began the reporting period operating at 100% (2028MWt) reactor power. On 4/04/2008 at 2000 hours0.0231 days 0.556 hours 0.00331 weeks 7.61e-4 months , a planned manual shutdown to replace the pilot valve associated with Safety Relief Valve 3C began. The reactor was taken critical at 1802 hours0.0209 days 0.501 hours 0.00298 weeks 6.85661e-4 months on 4/06/2008, and synchronized to the grid at 0557 hours0.00645 days 0.155 hours 9.209656e-4 weeks 2.119385e-4 months on 4/07/2008, and 100% reactor power (2028 MWt) was achieved at 0644 hours0.00745 days 0.179 hours 0.00106 weeks 2.45042e-4 months on 4/08/2008.

Additionally, on 4/08/08 a planned power reduction to about 62.8% began at 0722 hours0.00836 days 0.201 hours 0.00119 weeks 2.74721e-4 months for a control rod pattern exchange. The reactor was returned to 100 % power on 4/09/08 day at 1241 hours0.0144 days 0.345 hours 0.00205 weeks 4.722005e-4 months . The reactor operated at 100% power for the remainder for the reporting period.

OPERATING DATA REPORT DOCKET: 293 PREPARER NAME: Mary J. Gatslick UNIT_NME: Pilgrim Unit 1 PREPARER TELEPHONE: 508-830-8373 RPT_PERIOD: 200805

1. Design Electrical Rating: 690

2. Maximum Dependable Capacity (MWe-Net) 684.7 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,613.80 227,315.90

4. Number of Hours Generator On-line 744.00 3,600.50 224,896.27

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 506,840.63 2,456,293.48 136,471,282.80 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit began the reporting period operating at 100% (2028 MWt) reactor power. A planned power reduction began on 5/04/08 at 1821 hours0.0211 days 0.506 hours 0.00301 weeks 6.928905e-4 months for a main condenser thermal backwash. The lowest reactor power during the power reduction was to about 47.8% and 100% reactor power was achieved on 5/05/08 at 0529 hours0.00612 days 0.147 hours 8.746693e-4 weeks 2.012845e-4 months . The reactor operated at 100% (2028 MWt) for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 293 PREPARER NAME: Mary J. Gatslick UNIT_NME: Pilgrim Unit 1 PREPARER TELEPHONE: 508-830-8373 RPT_PERIOD: 200806

1. Design Electrical Rating: 690

2. Maximum Dependable Capacity (MWe-Net) 684.7 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,333.80 228,035.90

4. Number of Hours Generator On-line 720.00 4,320.50 225,616.27

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 484,156.96 2,940,450.44 136,955,439.76 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit began the reporting period operating at 100% (2028 MWt) reactor power. A planned power reduction began on 6/26/08 at 1047 hours0.0121 days 0.291 hours 0.00173 weeks 3.983835e-4 months for a thermal backwash of the 'B' Train of the main condenser. The lowest reactor power during the power reduction was to about 45% and 100%

reactor power was achieved on 6/27/08 at 0613 hours0.00709 days 0.17 hours 0.00101 weeks 2.332465e-4 months . A planned power reduction began on 6/30/08 at 0653 hours0.00756 days 0.181 hours 0.00108 weeks 2.484665e-4 months for a thermal backwash of the

'A' Train of the main condenser. The lowest reactor power during the power reduction was to about 49% and 100% reactor power was achieved on 6/30/08 at 1557 hours0.018 days 0.433 hours 0.00257 weeks 5.924385e-4 months . The reactor operated at 100% (2028 MWt) for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 266 PREPARER NAME: M. B. Arnold UNIT_NME: Point Beach Unit 1 PREPARER TELEPHONE: 920-755-7657 RPT_PERIOD: 200804

1. Design Electrical Rating: 522

2. Maximum Dependable Capacity (MWe-Net) 516 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,476.27 273,544.78

4. Number of Hours Generator On-line 720.00 2,442.35 269,801.94

5. Reserve Shutdown Hours 0.00 0.00 846.90

6. Net Electrical energy Generated (MWHrs) 371,207.00 1,252,116.50 126,752,713.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 266 PREPARER NAME: M. B. Arnold UNIT_NME: Point Beach Unit 1 PREPARER TELEPHONE: 920-755-7657 RPT_PERIOD: 200805

1. Design Electrical Rating: 522

2. Maximum Dependable Capacity (MWe-Net) 516 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,220.27 274,288.78

4. Number of Hours Generator On-line 744.00 3,186.35 270,545.94

5. Reserve Shutdown Hours 0.00 0.00 846.90

6. Net Electrical energy Generated (MWHrs) 376,494.00 1,628,610.50 127,129,207.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 266 PREPARER NAME: M. B. Arnold UNIT_NME: Point Beach Unit 1 PREPARER TELEPHONE: 920-755-7657 RPT_PERIOD: 200806

1. Design Electrical Rating: 522

2. Maximum Dependable Capacity (MWe-Net) 516 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,940.27 275,008.78

4. Number of Hours Generator On-line 720.00 3,906.35 271,265.94

5. Reserve Shutdown Hours 0.00 0.00 846.90

6. Net Electrical energy Generated (MWHrs) 368,424.50 1,997,035.00 127,497,632.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 301 PREPARER NAME: M. B. Arnold UNIT_NME: Point Beach Unit 2 PREPARER TELEPHONE: 920-755-7657 RPT_PERIOD: 200804

1. Design Electrical Rating: 522

2. Maximum Dependable Capacity (MWe-Net) 518 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 116.08 2,299.08 267,423.13

4. Number of Hours Generator On-line 115.32 2,298.32 264,184.79

5. Reserve Shutdown Hours 0.00 0.00 302.20

6. Net Electrical energy Generated (MWHrs) 57,692.00 1,195,726.50 125,941,899.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments U2R29 4/5/2008 S 604.68 C 1

SUMMARY

Unit 2 Refueling 29 began April 5, 2008.

OPERATING DATA REPORT DOCKET: 301 PREPARER NAME: M. B. Arnold UNIT_NME: Point Beach Unit 2 PREPARER TELEPHONE: 920-755-7657 RPT_PERIOD: 200805

1. Design Electrical Rating: 522

2. Maximum Dependable Capacity (MWe-Net) 518 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 547.13 2,846.21 267,970.26

4. Number of Hours Generator On-line 469.25 2,767.57 264,654.04

5. Reserve Shutdown Hours 0.00 0.00 302.20

6. Net Electrical energy Generated (MWHrs) 225,403.00 1,421,129.50 126,167,302.50 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments U2R29 4/5/2008 S 274.75 C 4

SUMMARY

Unit 2 Refueling 29 outage extension included in reporting.

OPERATING DATA REPORT DOCKET: 301 PREPARER NAME: M. B. Arnold UNIT_NME: Point Beach Unit 2 PREPARER TELEPHONE: 920-755-7657 RPT_PERIOD: 200806

1. Design Electrical Rating: 522

2. Maximum Dependable Capacity (MWe-Net) 518 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,566.21 268,690.26

4. Number of Hours Generator On-line 720.00 3,487.57 265,374.04

5. Reserve Shutdown Hours 0.00 0.00 302.20

6. Net Electrical energy Generated (MWHrs) 376,590.50 1,797,720.00 126,543,893.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 282 PREPARER NAME: Ron Whitlock UNIT_NME: Prairie Island Unit 1 PREPARER TELEPHONE: 651-267-6042 RPT_PERIOD: 200804

1. Design Electrical Rating: 536

2. Maximum Dependable Capacity (MWe-Net) 522 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,012.34 262,977.11

4. Number of Hours Generator On-line 720.00 1,965.32 260,570.14

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 381,922.00 999,216.00 131,308,611.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

During the month of April, Unit 1 was base loaded. There are no other items to report.

OPERATING DATA REPORT DOCKET: 282 PREPARER NAME: Ron Whitlock UNIT_NME: Prairie Island Unit 1 PREPARER TELEPHONE: 651-267-6042 RPT_PERIOD: 200805

1. Design Electrical Rating: 536

2. Maximum Dependable Capacity (MWe-Net) 522 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,756.34 263,721.11

4. Number of Hours Generator On-line 744.00 2,709.32 261,314.14

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 386,128.00 1,385,344.00 131,694,739.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

During the month of May, Unit 1 was base loaded. There are no other items to report.

OPERATING DATA REPORT DOCKET: 282 PREPARER NAME: Ron Whitlock UNIT_NME: Prairie Island Unit 1 PREPARER TELEPHONE: 651-267-6042 RPT_PERIOD: 200806

1. Design Electrical Rating: 536

2. Maximum Dependable Capacity (MWe-Net) 522 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,476.34 264,441.11

4. Number of Hours Generator On-line 720.00 3,429.32 262,034.14

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 370,060.00 1,755,404.00 132,064,799.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On June 4, reduced Reactor Power to <95% and secured 11HDTP (516MW) for 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months to replace 11 HDTP Packing. Reactor Power was raised to 99% (526MW) for 47 hours5.439815e-4 days 0.0131 hours 7.771164e-5 weeks 1.78835e-5 months to minimize derate. On June 7, reduced Reactor Power to <95% (513MW) for 8.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months to start 11 HDTP. There are no other items to report.

OPERATING DATA REPORT DOCKET: 306 PREPARER NAME: Ron Whitlock UNIT_NME: Prairie Island Unit 2 PREPARER TELEPHONE: 651-267-6042 RPT_PERIOD: 200804

1. Design Electrical Rating: 536

2. Maximum Dependable Capacity (MWe-Net) 522 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 261,449.59

4. Number of Hours Generator On-line 720.00 2,903.00 259,552.19

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 380,470.00 1,557,827.00 130,913,758.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

During the month of April, Unit 2 was base loaded. There are no other items to report.

OPERATING DATA REPORT DOCKET: 306 PREPARER NAME: Ron Whitlock UNIT_NME: Prairie Island Unit 2 PREPARER TELEPHONE: 651-267-6042 RPT_PERIOD: 200805

1. Design Electrical Rating: 536

2. Maximum Dependable Capacity (MWe-Net) 522 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 262,193.59

4. Number of Hours Generator On-line 744.00 3,647.00 260,296.19

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 386,630.00 1,944,457.00 131,300,388.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

During the month of May, Unit 2 was base loaded. There are no other items to report.

OPERATING DATA REPORT DOCKET: 306 PREPARER NAME: Ron Whitlock UNIT_NME: Prairie Island Unit 2 PREPARER TELEPHONE: 651-267-6042 RPT_PERIOD: 200806

1. Design Electrical Rating: 536

2. Maximum Dependable Capacity (MWe-Net) 522 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 262,913.59

4. Number of Hours Generator On-line 720.00 4,367.00 261,016.19

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 373,176.00 2,317,633.00 131,673,564.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

During the month of June, Unit 2 was base loaded. There are no other items to report

OPERATING DATA REPORT DOCKET: 254 PREPARER NAME: Debbie Cline UNIT_NME: Quad Cities Unit 1 PREPARER TELEPHONE: 309-227-2801 RPT_PERIOD: 200804

1. Design Electrical Rating: 866

2. Maximum Dependable Capacity (MWe-Net) 866 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 253,870.15

4. Number of Hours Generator On-line 720.00 2,903.00 248,255.16

5. Reserve Shutdown Hours 0.00 0.00 1,655.20

6. Net Electrical energy Generated (MWHrs) 595,308.00 2,449,573.00 169,965,848.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 began the month of April at full power. On April 11, 2008, a planned load drop to approximately 260 MWe commenced to repair a tube leak in the Unit 1 Main Condenser. During the load drop, an additional load drop to approximately 200 MWe was performed to support a containment entry to add oil to the 1A recirc lower motor bearing. The unit was returned to full power on April 14. On April 15, Unit 1 reduced power briefly to approximately 800 MWe for a planned Rod Shuffle and returned to power. Unit 1 remained at full power throughout the remainder of the month.

OPERATING DATA REPORT DOCKET: 254 PREPARER NAME: Debbie Cline UNIT_NME: Quad Cities Unit 1 PREPARER TELEPHONE: 309-227-2801 RPT_PERIOD: 200805

1. Design Electrical Rating: 866

2. Maximum Dependable Capacity (MWe-Net) 866 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 254,614.15

4. Number of Hours Generator On-line 744.00 3,647.00 248,999.16

5. Reserve Shutdown Hours 0.00 0.00 1,655.20

6. Net Electrical energy Generated (MWHrs) 640,594.00 3,090,167.00 170,606,442.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 operated at full power throughout the month of May with two exceptions. On May 10, 2008, Unit 1 reduced power to approximately 400 MWe to support a planned load drop for offgas SJAE swap, Control Rod shuffle and Hot Scram timing. Unit 1 was returned to full power on May 11, 2008. On May 24, 2008, power was decreased to approximately 730 MWe to perform planned Turbine testing. Unit 1 was returned to full power on May 25, 2008, and remained at full power throughout the reporting period.

OPERATING DATA REPORT DOCKET: 254 PREPARER NAME: Debbie Cline UNIT_NME: Quad Cities Unit 1 PREPARER TELEPHONE: 309-227-2801 RPT_PERIOD: 200806

1. Design Electrical Rating: 866

2. Maximum Dependable Capacity (MWe-Net) 866 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 255,334.15

4. Number of Hours Generator On-line 720.00 4,367.00 249,719.16

5. Reserve Shutdown Hours 0.00 0.00 1,655.20

6. Net Electrical energy Generated (MWHrs) 621,036.00 3,711,203.00 171,227,478.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 experienced an unplanned load drop on June 04, 2008, to approximately 750 MWe, due to a RFP seal leak. Unit 1 was returned to full power on June 05, 2008, and remained at full power throughout the reporting period.

OPERATING DATA REPORT DOCKET: 265 PREPARER NAME: Debbie Cline UNIT_NME: Quad Cities Unit 2 PREPARER TELEPHONE: 309-227-2801 RPT_PERIOD: 200804

1. Design Electrical Rating: 871

2. Maximum Dependable Capacity (MWe-Net) 871 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,274.87 246,297.17

4. Number of Hours Generator On-line 720.00 2,232.17 241,298.20

5. Reserve Shutdown Hours 0.00 0.00 2,312.90

6. Net Electrical energy Generated (MWHrs) 614,638.00 1,884,489.00 171,607,749.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 entered the month of April increasing load in support of start up activities from Q2R19. On April 03, 2008, Unit 2 reached full power, and remained at full power throughout the reporting period.

OPERATING DATA REPORT DOCKET: 265 PREPARER NAME: Debbie Cline UNIT_NME: Quad Cities Unit 2 PREPARER TELEPHONE: 309-227-2801 RPT_PERIOD: 200805

1. Design Electrical Rating: 871

2. Maximum Dependable Capacity (MWe-Net) 871 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,018.87 247,041.17

4. Number of Hours Generator On-line 744.00 2,976.17 242,042.20

5. Reserve Shutdown Hours 0.00 0.00 2,312.90

6. Net Electrical energy Generated (MWHrs) 646,588.00 2,531,077.00 172,254,337.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 operated at full power throughout the reporting period with one exception. On May 17, 2008, Unit 2 reduced power for a planned load drop to approximately 700 MWe to support Control Rod shuffle, Turbine testing and Hot Scram timing. Unit 2 was returned to full power on May 18, 2008, and remained at full power for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 265 PREPARER NAME: Debbie Cline UNIT_NME: Quad Cities Unit 2 PREPARER TELEPHONE: 309-227-2801 RPT_PERIOD: 200806

1. Design Electrical Rating: 871

2. Maximum Dependable Capacity (MWe-Net) 871 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,738.87 247,761.17

4. Number of Hours Generator On-line 720.00 3,696.17 242,762.20

5. Reserve Shutdown Hours 0.00 0.00 2,312.90

6. Net Electrical energy Generated (MWHrs) 626,774.00 3,157,851.00 172,881,111.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 operated at approximately 912 MWe throughout the reporting period. On June 18, 2008, a power ascension test to the licensed thermal power level was performed, which raised electrical output to approximately 940 MWe. Upon completion of the test, the unit was returned (June 18th) to approximately 912 MWe.

OPERATING DATA REPORT DOCKET: 458 PREPARER NAME: Danny H. Williamson UNIT_NME: River Bend Unit 1 PREPARER TELEPHONE: 225-381-4279 RPT_PERIOD: 200804

1. Design Electrical Rating: 967

2. Maximum Dependable Capacity (MWe-Net) 967 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 1,509.63 161,906.62

4. Number of Hours Generator On-line 720.00 1,408.58 157,573.60

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 712,112.00 1,177,131.00 142,833,511.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 458 PREPARER NAME: Danny H. Williamson UNIT_NME: River Bend Unit 1 PREPARER TELEPHONE: 225-381-4279 RPT_PERIOD: 200805

1. Design Electrical Rating: 967

2. Maximum Dependable Capacity (MWe-Net) 967 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,253.63 162,650.62

4. Number of Hours Generator On-line 744.00 2,152.58 158,317.60

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 720,704.00 1,897,835.00 143,554,215.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 458 PREPARER NAME: Danny H. Williamson UNIT_NME: River Bend Unit 1 PREPARER TELEPHONE: 225-381-4279 RPT_PERIOD: 200806

1. Design Electrical Rating: 967

2. Maximum Dependable Capacity (MWe-Net) 967 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,973.63 163,370.62

4. Number of Hours Generator On-line 720.00 2,872.58 159,037.60

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 671,406.00 2,569,241.00 144,225,621.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 261 PREPARER NAME: Tim Surma UNIT_NME: Robinson Unit 2 PREPARER TELEPHONE: 843-857-1086 RPT_PERIOD: 200804

1. Design Electrical Rating: 765

2. Maximum Dependable Capacity (MWe-Net) 710 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 255,749.64

4. Number of Hours Generator On-line 720.00 2,903.00 252,323.76

5. Reserve Shutdown Hours 0.00 0.00 23.20

6. Net Electrical energy Generated (MWHrs) 541,202.00 2,186,456.00 168,256,784.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at approximately full power for the entire month.

OPERATING DATA REPORT DOCKET: 261 PREPARER NAME: Tim Surma UNIT_NME: Robinson Unit 2 PREPARER TELEPHONE: 843-857-1086 RPT_PERIOD: 200805

1. Design Electrical Rating: 765

2. Maximum Dependable Capacity (MWe-Net) 710 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 256,493.64

4. Number of Hours Generator On-line 744.00 3,647.00 253,067.76

5. Reserve Shutdown Hours 0.00 0.00 23.20

6. Net Electrical energy Generated (MWHrs) 554,155.00 2,740,611.00 168,810,939.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at approximately full power for the entire month.

OPERATING DATA REPORT DOCKET: 261 PREPARER NAME: Tim Surma UNIT_NME: Robinson Unit 2 PREPARER TELEPHONE: 843-857-1086 RPT_PERIOD: 200806

1. Design Electrical Rating: 765

2. Maximum Dependable Capacity (MWe-Net) 710 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 257,213.64

4. Number of Hours Generator On-line 720.00 4,367.00 253,787.76

5. Reserve Shutdown Hours 0.00 0.00 23.20

6. Net Electrical energy Generated (MWHrs) 524,773.00 3,265,384.00 169,335,712.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at approximately full power for the entire month.

OPERATING DATA REPORT DOCKET: 272 PREPARER NAME: Gary A. Loeb UNIT_NME: Salem Unit 1 PREPARER TELEPHONE: 856.339.1049 RPT_PERIOD: 200804

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1116 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,897.02 185,502.48

4. Number of Hours Generator On-line 720.00 2,888.92 180,452.53

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 844,147.00 3,361,593.00 188,676,649.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

3606 MWh lost due to grid-related downpowers (500kV line issues and maintenance).

OPERATING DATA REPORT DOCKET: 272 PREPARER NAME: Gary A. Loeb UNIT_NME: Salem Unit 1 PREPARER TELEPHONE: 856.339.1049 RPT_PERIOD: 200805

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1116 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,641.02 186,246.48

4. Number of Hours Generator On-line 744.00 3,632.92 181,196.53

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 874,438.00 4,236,031.00 189,551,087.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 272 PREPARER NAME: Gary A. Loeb UNIT_NME: Salem Unit 1 PREPARER TELEPHONE: 856.339.1049 RPT_PERIOD: 200806

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1116 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,361.02 186,966.48

4. Number of Hours Generator On-line 720.00 4,352.92 181,916.53

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 838,918.00 5,074,949.00 190,390,005.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 311 PREPARER NAME: Gary A. Loeb UNIT_NME: Salem Unit 2 PREPARER TELEPHONE: 856.339.1049 RPT_PERIOD: 200804

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1088 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 0.00 1,699.00 162,448.35

4. Number of Hours Generator On-line 0.00 1,699.00 158,582.67

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.00 1,915,751.00 165,746,447.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments S2R16 3/11/2008 S 720.00 C 4 Refuel Outage and Steam Generator replacement, continuing to May 2008.

SUMMARY

Refuel outage S2R16 all month.

OPERATING DATA REPORT DOCKET: 311 PREPARER NAME: Gary A. Loeb UNIT_NME: Salem Unit 2 PREPARER TELEPHONE: 856.339.1049 RPT_PERIOD: 200805

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1088 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 508.53 2,207.53 162,956.88

4. Number of Hours Generator On-line 449.88 2,148.88 159,032.55

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 430,339.00 2,346,090.00 166,176,786.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments S2R08 5/9/2008 F 28.17 A 2 Turbine shutdown due to loss of all circulating water

-01 travelling screens. Reactor subsequently manually tripped due to high steam generator level.

S2F08 5/12/2008 F 81.50 H 1 Main steam flow measured was non-conservatively

-02 high during power ascension with relation to safety system action parameters. Unit was taken off-line to recalibrate and resolve flow error. See LER 311/2008-003-00 for details.

S2R16 3/11/2008 S 184.45 C 4 Refuel Outage and Steam Generator replacement, continuing to May 2008.

SUMMARY

Refuel outage S2R16 ended 05/08/2008. Forced shutdown from 05/09/2008 to 05/10/2008 for low SG Level. Forced shutdown from 05/12/2008 to 05/16/2008 due to non-conservative steam flow measurement. Remainder of unplanned losses due to circulating water system problems and low steam generator pressures.

OPERATING DATA REPORT DOCKET: 311 PREPARER NAME: Kevin M. Heck UNIT_NME: Salem Unit 2 PREPARER TELEPHONE: 856-339-1975 RPT_PERIOD: 200806

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1088 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,927.53 163,676.88

4. Number of Hours Generator On-line 720.00 2,868.88 159,752.55

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 823,341.00 3,169,431.00 167,000,127.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 361 PREPARER NAME: Clay Williams UNIT_NME: San Onofre Unit 2 PREPARER TELEPHONE: 9493686707 RPT_PERIOD: 200804

1. Design Electrical Rating: 1070

2. Maximum Dependable Capacity (MWe-Net) 1070 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,488.57 177,831.24

4. Number of Hours Generator On-line 720.00 2,464.67 175,436.97

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 771,719.20 2,661,852.21 188,850,897.20 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

4/1/08 Unit 2 in Mode 1. 4/30 Unit in Mode 1.

OPERATING DATA REPORT DOCKET: 361 PREPARER NAME: Clay Williams UNIT_NME: San Onofre Unit 2 PREPARER TELEPHONE: (949)3686707 RPT_PERIOD: 200805

1. Design Electrical Rating: 1070

2. Maximum Dependable Capacity (MWe-Net) 1070 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,232.57 178,575.24

4. Number of Hours Generator On-line 744.00 3,208.67 176,180.97

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 832,160.05 3,494,012.26 189,683,057.25 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

5/1/08 Unit 2 in Mode 1. 5/31 Unit in Mode 1.

OPERATING DATA REPORT DOCKET: 361 PREPARER NAME: Clay Williams UNIT_NME: San Onofre Unit 2 PREPARER TELEPHONE: (949)3686707 RPT_PERIOD: 200806

1. Design Electrical Rating: 1070

2. Maximum Dependable Capacity (MWe-Net) 1070 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 587.23 3,819.80 179,162.47

4. Number of Hours Generator On-line 560.15 3,768.82 176,741.12

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 568,024.99 4,062,037.25 190,251,082.24 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 6/1/2008 S 61.32 B 1 Replace main generator insulators.

2 6/5/2008 F 98.53 A 3 Trip during performance of Stator Water low flow test.

SUMMARY

6/1/08 Unit 2 in Mode 1. 6/1 01:38 Tripped Turbine. 6/1 01:47 Tripped Reactor. 6/2 23:49 Reactor Critical. 6/3 03:33 entered Mode 1. 6/3 14:57 Breakers Closed. 6/5 22:56 Reactor Trip. 6/9 13:14 entered Mode 2. 6/9 13:40 Reactor critical. 6/9 17:21 Entered Mode 1. 6/10 01:28 Breakers Closed. 6/30 Mode 1.

OPERATING DATA REPORT DOCKET: 362 PREPARER NAME: Clay Williams UNIT_NME: San Onofre Unit 3 PREPARER TELEPHONE: 9493686707 RPT_PERIOD: 200804

1. Design Electrical Rating: 1080

2. Maximum Dependable Capacity (MWe-Net) 1080 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 372.50 2,555.50 175,469.60

4. Number of Hours Generator On-line 372.48 2,555.48 173,010.31

5. Reserve Shutdown Hours 347.52 347.52 426.07

6. Net Electrical energy Generated (MWHrs) 403,042.10 2,831,850.56 184,551,167.69 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 4/16/2008 S 347.52 H 1 Outage for Fuel Conservation.

SUMMARY

4/1/08 Unit 3 in Mode 1. 4/16 12:29 Tripped Turbine. 4/16 12:30 Tripped Reactor. 4/30 Unit in Mode 3.

OPERATING DATA REPORT DOCKET: 362 PREPARER NAME: Clay Williams UNIT_NME: San Onofre Unit 3 PREPARER TELEPHONE: (949)3686707 RPT_PERIOD: 200805

1. Design Electrical Rating: 1080

2. Maximum Dependable Capacity (MWe-Net) 1080 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 454.23 3,009.73 175,923.83

4. Number of Hours Generator On-line 440.57 2,996.05 173,450.88

5. Reserve Shutdown Hours 303.43 650.95 729.50

6. Net Electrical energy Generated (MWHrs) 380,724.75 3,212,575.31 184,931,892.44 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 4/16/2008 S 303.43 H 4 Outage for Fuel Conservation.

SUMMARY

5/1/08 Unit 3 in Mode 3. 5/13 00:12 Entered Mode 2. 5/13 01:46 Reactor Critical. 5/13 09:40 Entered Mode 1. 5/13 15:26 Breakers Closed.

5/31 Unit in Mode 1.

OPERATING DATA REPORT DOCKET: 362 PREPARER NAME: Clay Williams UNIT_NME: San Onofre Unit 3 PREPARER TELEPHONE: (949)3686707 RPT_PERIOD: 200806

1. Design Electrical Rating: 1080

2. Maximum Dependable Capacity (MWe-Net) 1080 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,729.73 176,643.83

4. Number of Hours Generator On-line 720.00 3,716.05 174,170.88

5. Reserve Shutdown Hours 0.00 650.95 729.50

6. Net Electrical energy Generated (MWHrs) 805,916.74 4,018,492.05 185,737,809.18 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

6/1/08 Unit 3 in Mode 1. 6/30 Unit in Mode 1.

OPERATING DATA REPORT DOCKET: 443 PREPARER NAME: Kevin Randall UNIT_NME: Seabrook Unit 1 PREPARER TELEPHONE: 603.773.7992 RPT_PERIOD: 200804

1. Design Electrical Rating: 1246

2. Maximum Dependable Capacity (MWe-Net) 1243 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 3.27 1,917.27 138,119.05

4. Number of Hours Generator On-line 0.02 1,897.94 134,916.08

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.40 2,329,575.34 154,576,874.24 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-02 4/1/2008 S 719.98 C 1 Scheduled refueling outage

SUMMARY

Scheduled Refueling Outage. Unit off-line on April 1 at 0001. Reactor sub-critical at 0315.

OPERATING DATA REPORT DOCKET: 443 PREPARER NAME: Kevin Randall UNIT_NME: Seabrook Unit 1 PREPARER TELEPHONE: 603.773.7992 RPT_PERIOD: 200805

1. Design Electrical Rating: 1246

2. Maximum Dependable Capacity (MWe-Net) 1243 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 582.13 2,499.40 138,701.18

4. Number of Hours Generator On-line 562.67 2,460.61 135,478.75

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 667,512.01 2,997,087.35 155,244,386.25 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-02 4/1/2008 S 181.33 C 4 Scheduled refueling outage

SUMMARY

The unit operated at 100% power for 486 hours0.00563 days 0.135 hours 8.035714e-4 weeks 1.84923e-4 months this month. The Unit returned to full power operation on May 11th following Refueling Outage 12

OPERATING DATA REPORT DOCKET: 443 PREPARER NAME: Kevin Randall UNIT_NME: Seabrook Unit 1 PREPARER TELEPHONE: 603.773.7992 RPT_PERIOD: 200806

1. Design Electrical Rating: 1246

2. Maximum Dependable Capacity (MWe-Net) 1243 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,219.40 139,421.18

4. Number of Hours Generator On-line 720.00 3,180.61 136,198.75

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 855,930.23 3,853,017.58 156,100,316.48 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at 100% power 664 out of the 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months this month. The unit reduced power to 30% to repair a condenser tube leak 6/5-6/7.

This yielded an availability factor of 100.00% and a capacity factor of 95.6389% based on the MDC of 1243.0 Net MWe.

OPERATING DATA REPORT DOCKET: 327 PREPARER NAME: Sharon Powell UNIT_NME: Sequoyah Unit 1 PREPARER TELEPHONE: 423/843-7855 RPT_PERIOD: 200804

1. Design Electrical Rating: 1173

2. Maximum Dependable Capacity (MWe-Net) 1148 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,865.08 167,303.01

4. Number of Hours Generator On-line 720.00 2,857.87 165,113.25

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 845,040.00 3,350,400.60 182,196,936.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 Gross Maximum Dependable Capacity Factor was 102.114 for the month of April 2008.

OPERATING DATA REPORT DOCKET: 327 PREPARER NAME: Sharon Powell UNIT_NME: Sequoyah Unit 1 PREPARER TELEPHONE: 423/843-7855 RPT_PERIOD: 200805

1. Design Electrical Rating: 1173

2. Maximum Dependable Capacity (MWe-Net) 1148 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,609.08 168,047.01

4. Number of Hours Generator On-line 744.00 3,601.87 165,857.25

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 862,205.00 4,212,605.60 183,059,141.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 Gross Maximum Dependable Capacity Factor was 101.714 for the month of May 2008.

OPERATING DATA REPORT DOCKET: 327 PREPARER NAME: Sharon Powell UNIT_NME: Sequoyah Unit 1 PREPARER TELEPHONE: 423/843-7855 RPT_PERIOD: 200806

1. Design Electrical Rating: 1173

2. Maximum Dependable Capacity (MWe-Net) 1148 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,329.08 168,767.01

4. Number of Hours Generator On-line 720.00 4,321.87 166,577.25

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 832,788.00 5,045,393.60 183,891,929.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 Gross Maximum Dependable Capacity Factor was 100.972 for the month of June 2008.

OPERATING DATA REPORT DOCKET: 328 PREPARER NAME: Sharon Powell UNIT_NME: Sequoyah Unit 2 PREPARER TELEPHONE: 423/843-7855 RPT_PERIOD: 200804

1. Design Electrical Rating: 1151

2. Maximum Dependable Capacity (MWe-Net) 1126 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 172,694.55

4. Number of Hours Generator On-line 720.00 2,903.00 170,250.42

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 773,355.00 3,308,929.00 184,485,806.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 Gross Maximum Dependable Capacity Factor was 95.149 for the month of April 2008.

OPERATING DATA REPORT DOCKET: 328 PREPARER NAME: Sharon Powell UNIT_NME: Sequoyah Unit 2 PREPARER TELEPHONE: 423/843-7855 RPT_PERIOD: 200805

1. Design Electrical Rating: 1151

2. Maximum Dependable Capacity (MWe-Net) 1126 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 96.00 2,999.00 172,790.55

4. Number of Hours Generator On-line 96.00 2,999.00 170,346.42

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 85,192.00 3,394,121.00 184,570,998.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 01 5/5/2008 S 648.00 C 1 Manually tripped Reactor for Unit 2 Cycle 15 Refueling Outage

SUMMARY

Unit 2 Gross Maximum Dependable Capacity Factor was 9.829 for the month of May 2008.

OPERATING DATA REPORT DOCKET: 328 PREPARER NAME: Sharon Powell UNIT_NME: Sequoyah Unit 2 PREPARER TELEPHONE: 423/843-7855 RPT_PERIOD: 200806

1. Design Electrical Rating: 1151

2. Maximum Dependable Capacity (MWe-Net) 1126 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 648.52 3,647.52 173,439.07

4. Number of Hours Generator On-line 616.42 3,615.42 170,962.84

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 671,463.00 4,065,584.00 185,242,461.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 01 5/5/2008 S 103.58 C 4 Manually tripped Reactor for Unit 2 Cycle 15 Refueling Outage

SUMMARY

Unit 2 Gross Maximum Dependable Capacity Factor was 82.451 for the month of June 2008.

OPERATING DATA REPORT DOCKET: 498 PREPARER NAME: R. L. Hill UNIT_NME: South Texas Unit 1 PREPARER TELEPHONE: 361 972-7667 RPT_PERIOD: 200804

1. Design Electrical Rating: 1250.6

2. Maximum Dependable Capacity (MWe-Net) 1250.6 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 130.58 2,264.63 142,693.47

4. Number of Hours Generator On-line 94.07 2,227.10 138,256.88

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 97,717.00 2,913,573.00 170,919,573.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1 3/29/2008 S 625.93 C 4 Unit removed from service for refueling and scheduled maintenance.

SUMMARY

Scheduled maintenance and refueling outage.

OPERATING DATA REPORT DOCKET: 498 PREPARER NAME: R. L. Hill UNIT_NME: South Texas Unit 1 PREPARER TELEPHONE: 361 972-7667 RPT_PERIOD: 200805

1. Design Electrical Rating: 1250.6

2. Maximum Dependable Capacity (MWe-Net) 1250.6 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,008.63 143,437.47

4. Number of Hours Generator On-line 744.00 2,971.10 139,000.88

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 1,000,590.00 3,914,163.00 171,920,163.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 498 PREPARER NAME: R. L. Hill UNIT_NME: South Texas Unit 1 PREPARER TELEPHONE: 361 972-7667 RPT_PERIOD: 200806

1. Design Electrical Rating: 1250.6

2. Maximum Dependable Capacity (MWe-Net) 1250.6 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,728.63 144,157.47

4. Number of Hours Generator On-line 720.00 3,691.10 139,720.88

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 958,024.00 4,872,187.00 172,878,187.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 499 PREPARER NAME: R. L. Hill UNIT_NME: South Texas Unit 2 PREPARER TELEPHONE: 361 972-7667 RPT_PERIOD: 200804

1. Design Electrical Rating: 1250.6

2. Maximum Dependable Capacity (MWe-Net) 1250.6 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 137,362.72

4. Number of Hours Generator On-line 720.00 2,903.00 135,000.23

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 970,556.00 3,942,265.00 166,852,929.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 499 PREPARER NAME: R. L. Hill UNIT_NME: South Texas Unit 2 PREPARER TELEPHONE: 361 972-7667 RPT_PERIOD: 200805

1. Design Electrical Rating: 1250.6

2. Maximum Dependable Capacity (MWe-Net) 1250.6 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 138,106.72

4. Number of Hours Generator On-line 744.00 3,647.00 135,744.23

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 998,585.00 4,940,850.00 167,851,514.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 499 PREPARER NAME: R. L. Hill UNIT_NME: South Texas Unit 2 PREPARER TELEPHONE: 361 972-7667 RPT_PERIOD: 200806

1. Design Electrical Rating: 1250.6

2. Maximum Dependable Capacity (MWe-Net) 1250.6 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 138,826.72

4. Number of Hours Generator On-line 720.00 4,367.00 136,464.23

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 954,847.00 5,895,697.00 168,806,361.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 335 PREPARER NAME: K. R. Boller UNIT_NME: St. Lucie Unit 1 PREPARER TELEPHONE: 772 467-7465 RPT_PERIOD: 200804

1. Design Electrical Rating: 856

2. Maximum Dependable Capacity (MWe-Net) 839 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 227,481.84

4. Number of Hours Generator On-line 720.00 2,903.00 225,527.18

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 617,437.00 2,478,786.00 185,691,160.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

St. Lucie Unit 1 operated in Mode 1 for the entire reporting period.

OPERATING DATA REPORT DOCKET: 335 PREPARER NAME: K. R. Boller UNIT_NME: St. Lucie Unit 1 PREPARER TELEPHONE: 772 467-7465 RPT_PERIOD: 200805

1. Design Electrical Rating: 856

2. Maximum Dependable Capacity (MWe-Net) 839 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 228,225.84

4. Number of Hours Generator On-line 744.00 3,647.00 226,271.18

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 636,954.00 3,115,740.00 186,328,114.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

St. Lucie Unit 1 operated in Mode 1 for the entire reporting period.

OPERATING DATA REPORT DOCKET: 335 PREPARER NAME: R. S. Margolis UNIT_NME: St. Lucie Unit 1 PREPARER TELEPHONE: 772 467-7296 RPT_PERIOD: 200806

1. Design Electrical Rating: 856

2. Maximum Dependable Capacity (MWe-Net) 839 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 228,945.84

4. Number of Hours Generator On-line 720.00 4,367.00 226,991.18

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 615,573.00 3,731,313.00 186,943,687.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

St. Lucie Unit 1 operated in Mode 1 for the entire reporting period.

OPERATING DATA REPORT DOCKET: 389 PREPARER NAME: K. R. Boller UNIT_NME: St. Lucie Unit 2 PREPARER TELEPHONE: 772 467-7465 RPT_PERIOD: 200804

1. Design Electrical Rating: 856

2. Maximum Dependable Capacity (MWe-Net) 839 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,581.50 188,117.71

4. Number of Hours Generator On-line 720.00 2,561.38 186,016.13

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 612,585.00 2,143,930.00 153,474,190.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

St. Lucie Unit 2 operated in Mode 1 for the entire reporting period.

OPERATING DATA REPORT DOCKET: 389 PREPARER NAME: K. R. Boller UNIT_NME: St. Lucie Unit 2 PREPARER TELEPHONE: 772 467-7465 RPT_PERIOD: 200805

1. Design Electrical Rating: 856

2. Maximum Dependable Capacity (MWe-Net) 839 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,325.50 188,861.71

4. Number of Hours Generator On-line 744.00 3,305.38 186,760.13

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 635,213.00 2,779,143.00 154,109,403.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

St. Lucie Unit 2 operated in Mode 1 for the entire reporting period.

OPERATING DATA REPORT DOCKET: 389 PREPARER NAME: R. S. Margolis UNIT_NME: St. Lucie Unit 2 PREPARER TELEPHONE: 772 467-7296 RPT_PERIOD: 200806

1. Design Electrical Rating: 856

2. Maximum Dependable Capacity (MWe-Net) 839 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 648.17 3,973.67 189,509.88

4. Number of Hours Generator On-line 639.17 3,944.55 187,399.30

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 524,943.00 3,304,086.00 154,634,346.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 04 6/7/2008 F 39.08 A 2 automatic trip of 2B condensate and 2B feedwater pumps. Operators manually tripped reactor.

03 6/4/2008 F 41.75 G 2 Maintenace error lead to automatic trip of the 2B heater feed pump and 2A main feedwater pump.

Operations manually tripped reactor.

SUMMARY

St. Lucie Unit 2 operated in Mode 1 until 6/4/08 at 1750 hours0.0203 days 0.486 hours 0.00289 weeks 6.65875e-4 months when the unit was manually removed from service. St. Lucie Unit 2 returned to Mode 1 operation on 6/6/08 and remained in Mode 1 until 6/7/08 at 0818 hours0.00947 days 0.227 hours 0.00135 weeks 3.11249e-4 months when the unit was manually removed from service. St. Lucie Unit 2 returned to Mode 1 operation on 6/8/08 and 2015 hours0.0233 days 0.56 hours 0.00333 weeks 7.667075e-4 months and remained in Mode 1 for the remainder of the reporting period.

OPERATING DATA REPORT DOCKET: 395 PREPARER NAME: Gerald A. Loignon, Jr.

UNIT_NME: Summer Unit 1 PREPARER TELEPHONE: (803) 345-4508 RPT_PERIOD: 200804

1. Design Electrical Rating: 972.7

2. Maximum Dependable Capacity (MWe-Net) 966 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 601.00 2,603.82 182,275.98

4. Number of Hours Generator On-line 599.60 2,587.05 180,086.77

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 574,748.00 2,511,312.00 161,227,242.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2 4/25/2008 S 120.40 C 1 Power was reduced to 85% on April 23 for main steam safety valve testing and preparation toward the unit shut down for refueling (RF-17). The unit was taken off line on April 25 at 23:36 to begin RF-

17. The reactor returned to criticality on 06/13/08 01:15 and synchronized to the grid on 06/14/08 04:44. The turbine was taken off line from 06/14/08 08:44 to 06/14/08 10:30 to perform Turbine Overspeed trip test. Reactor power was limited to 75% to resolve issue with the "B" loop hot leg narrow range RTD reading high. Full reactor power was achieved on 06/17/08 19:33.

SUMMARY

Power was reduced to 85% on April 23 for main steam safety valve testing and preparation toward the unit shut down for refueling (RF-17). The unit was taken off line on April 25 at 23:36 to begin RF-17. The plant remained shut down for the remainder of the month.

OPERATING DATA REPORT DOCKET: 395 PREPARER NAME: Gerald A. Loignon, Jr.

UNIT_NME: Summer Unit 1 PREPARER TELEPHONE: (803) 345-4508 RPT_PERIOD: 200805

1. Design Electrical Rating: 972.7

2. Maximum Dependable Capacity (MWe-Net) 966 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 0.00 2,603.82 182,275.98

4. Number of Hours Generator On-line 0.00 2,587.05 180,086.77

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.00 2,511,312.00 161,227,242.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2 4/25/2008 S 744.00 C 4 Power was reduced to 85% on April 23 for main steam safety valve testing and preparation toward the unit shut down for refueling (RF-17). The unit was taken off line on April 25 at 23:36 to begin RF-

17. The reactor returned to criticality on 06/13/08 01:15 and synchronized to the grid on 06/14/08 04:44. The turbine was taken off line from 06/14/08 08:44 to 06/14/08 10:30 to perform Turbine Overspeed trip test. Reactor power was limited to 75% to resolve issue with the "B" loop hot leg narrow range RTD reading high. Full reactor power was achieved on 06/17/08 19:33.

SUMMARY

The plant remained shutdown for RF-17 during the entire month of May.

OPERATING DATA REPORT DOCKET: 395 PREPARER NAME: Gerald A. Loignon, JR.

UNIT_NME: Summer Unit 1 PREPARER TELEPHONE: (803) 345-4508 RPT_PERIOD: 200806

1. Design Electrical Rating: 972.7

2. Maximum Dependable Capacity (MWe-Net) 966 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 430.75 3,034.57 182,706.73

4. Number of Hours Generator On-line 401.50 2,988.55 180,488.27

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 358,159.00 2,869,471.00 161,585,401.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 3 6/14/2008 S 1.77 B 5 The turbine was taken off line from 06/14/08 08:44 to 06/14/08 10:30 to perform Turbine Overspeed trip test.

2 4/25/2008 S 316.73 C 4 Power was reduced to 85% on April 23 for main steam safety valve testing and preparation toward the unit shut down for refueling (RF-17). The unit was taken off line on April 25 at 23:36 to begin RF-

17. The reactor returned to criticality on 06/13/08 01:15 and synchronized to the grid on 06/14/08 04:44. The turbine was taken off line from 06/14/08 08:44 to 06/14/08 10:30 to perform Turbine Overspeed trip test. Reactor power was limited to 75% to resolve issue with the "B" loop hot leg narrow range RTD reading high. Full reactor power was achieved on 06/17/08 19:33.

SUMMARY

The reactor returned to criticality on 06/13/08 01:15 and synchronized to the grid on 06/14/08 04:44. The turbine was taken off line from 06/14/08 08:44 to 06/14/08 10:30 to perform Turbine Overspeed trip test. Reactor power was limited to 75% to resolve issue with the "B" loop hot leg narrow range RTD reading high. Full reactor power was achieved on 06/17/08 19:33.

OPERATING DATA REPORT DOCKET: 280 PREPARER NAME: Marlene Haskett UNIT_NME: Surry Unit 1 PREPARER TELEPHONE: 757-365-2146 RPT_PERIOD: 200804

1. Design Electrical Rating: 788

2. Maximum Dependable Capacity (MWe-Net) 799 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 617.05 2,800.05 236,376.94

4. Number of Hours Generator On-line 599.63 2,782.63 233,363.06

5. Reserve Shutdown Hours 0.00 0.00 3,736.20

6. Net Electrical energy Generated (MWHrs) 477,734.08 2,247,387.26 176,187,549.29 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 1G-10 4/16/2008 S 93.35 B 1 04/16/08 U1 taken offline for 1-FW-E-6B, Feedwater Heater Tube Repair 1G-11 4/20/2008 F 27.02 B 2 04/20/08 U1 manually tripped due to elevated vibrations on the #4 Turbine Bearing

SUMMARY

04/16/08 @ 2106 Unit 1 taken offline for 1-FW-E-6B (Feedwater Heater Tube Repair) 04/20/08 @ 1827 Unit 1 online 04/20/08 @ 2216 Unit 1 manually tripped due to elevated vibrations on the #4 Turbine Bearing.

04/21/08 @ 2348 Unit 1 online

OPERATING DATA REPORT DOCKET: 280 PREPARER NAME: Marlene Haskett UNIT_NME: Surry Unit 1 PREPARER TELEPHONE: 757-365-2146 RPT_PERIOD: 200805

1. Design Electrical Rating: 788

2. Maximum Dependable Capacity (MWe-Net) 799 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,544.05 237,120.94

4. Number of Hours Generator On-line 744.00 3,526.63 234,107.06

5. Reserve Shutdown Hours 0.00 0.00 3,736.20

6. Net Electrical energy Generated (MWHrs) 598,485.96 2,845,873.22 176,786,035.25 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

05/04/08 @ 0447 Commence ramping U1 to 72% power for repairs on Condenser Vacuum.

05/04/08 @ 1527 Unit 1 at full power

OPERATING DATA REPORT DOCKET: 280 PREPARER NAME: Marlene Haskett UNIT_NME: Surry Unit 1 PREPARER TELEPHONE: 757-365-2146 RPT_PERIOD: 200806

1. Design Electrical Rating: 788

2. Maximum Dependable Capacity (MWe-Net) 799 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,264.05 237,840.94

4. Number of Hours Generator On-line 720.00 4,246.63 234,827.06

5. Reserve Shutdown Hours 0.00 0.00 3,736.20

6. Net Electrical energy Generated (MWHrs) 577,445.68 3,423,318.90 177,363,480.93 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 281 PREPARER NAME: Marlene Haskett UNIT_NME: Surry Unit 2 PREPARER TELEPHONE: 757-365-2146 RPT_PERIOD: 200804

1. Design Electrical Rating: 788

2. Maximum Dependable Capacity (MWe-Net) 799 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 624.47 2,807.47 234,963.84

4. Number of Hours Generator On-line 624.40 2,807.40 232,372.39

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 494,844.72 2,270,529.96 176,211,227.07 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2G-05 4/27/2008 S 95.60 C 1 04/27/08 @ 0024 Unit 2 shutdown for Refueling Outage 05/21/08 @ 0228 Unit 2 placed online

SUMMARY

04/16/08 @ 1100 Commenced Rx coastdown power reduction.

04/26/08 @ 0000 Unit 2 @ 92% Px Power, 790 MWe 04/26/08 @ 1904 Commenced Unit shutdown Rx power 92%, 790 MWe.

04/27/08 @ 0024 - Unit 2 taken offline for Refuling Outage

OPERATING DATA REPORT DOCKET: 281 PREPARER NAME: Marlene Haskett UNIT_NME: Surry Unit 2 PREPARER TELEPHONE: 757-365-2146 RPT_PERIOD: 200805

1. Design Electrical Rating: 788

2. Maximum Dependable Capacity (MWe-Net) 799 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 278.10 3,085.57 235,241.94

4. Number of Hours Generator On-line 261.53 3,068.93 232,633.92

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 195,490.75 2,466,020.71 176,406,717.82 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2G-05 4/27/2008 S 482.47 C 4 04/27/08 @ 0024 Unit 2 shutdown for Refueling Outage 05/21/08 @ 0228 Unit 2 placed online

SUMMARY

Unit offline for planned U2 Refueling Outage 05/21/08 @ 0228 Unit 2 placed online 05/23/08 @ 0325 Unit 2 @ 100% Rx power.

OPERATING DATA REPORT DOCKET: 281 PREPARER NAME: Marlene Haskett UNIT_NME: Surry Unit 2 PREPARER TELEPHONE: 757-365-2146 RPT_PERIOD: 200806

1. Design Electrical Rating: 788

2. Maximum Dependable Capacity (MWe-Net) 799 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,805.57 235,961.94

4. Number of Hours Generator On-line 720.00 3,788.93 233,353.92

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 579,086.85 3,045,107.56 176,985,804.67 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 387 PREPARER NAME: J. Hennings UNIT_NME: Susquehanna Unit 1 PREPARER TELEPHONE: 570-542-3747 RPT_PERIOD: 200804

1. Design Electrical Rating: 1177

2. Maximum Dependable Capacity (MWe-Net) 1135 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 366.03 1,884.36 184,373.57

4. Number of Hours Generator On-line 335.83 1,849.98 181,797.64

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 314,055.00 2,060,112.00 190,236,539.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2 4/17/2008 S 0.55 B 5 Planned Turbine Overspeed Trip test. Reactor was maintained at approximately 18% during testing.

SUMMARY

Completed Refueling Outage #15 on 4/16/08, and commenced ramp up to perform Power Uprate testing for a power level of 3733 MWth. This is the First phase of the 2 phase Uprate. The Second phase will be implemented in 2010.

OPERATING DATA REPORT DOCKET: 387 PREPARER NAME: J. Hennings UNIT_NME: Susquehanna Unit 1 PREPARER TELEPHONE: 570-542-3747 RPT_PERIOD: 200805

1. Design Electrical Rating: 1235

2. Maximum Dependable Capacity (MWe-Net) 1185 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,628.36 185,117.57

4. Number of Hours Generator On-line 744.00 2,593.98 182,541.64

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 880,232.00 2,940,344.00 191,116,771.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

A New Maximum Thermal Power of 3733 MWth ( 94.4% of 3952 MWTH) was achived in May through the first phase of the Extended Power Uprate ( EPU) project. The only power change greater than 20 % power was for a planned condensate pump trip test on 5/16/05 to 65.5% as part of the EPU Testing. Reactor Power was returned to 3733 MWTH on 5/18/08.

OPERATING DATA REPORT DOCKET: 387 PREPARER NAME: J. Hennings UNIT_NME: Susquehanna Unit 1 PREPARER TELEPHONE: 570-542-3747 RPT_PERIOD: 200806

1. Design Electrical Rating: 1235

2. Maximum Dependable Capacity (MWe-Net) 1185 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,348.36 185,837.57

4. Number of Hours Generator On-line 720.00 3,313.98 183,261.64

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 830,254.00 3,770,598.00 191,947,025.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There was an unplanned power reduction on 6/9/08 due to Manual trip of a Recirc Pump because the normal speed controller was not operating properly. Reactor Power was reduced to approximately 25%. Following the repair of the controller, power was raised to 3733 MWth (normal power limit of 94.4 %) on 06/11/08.

A planned power reduction of 24 % was also performed on 6/21/08 for SCRAM Timing and a Sequence Exchange.

Reactor Power was again raised to 94.4% on 06/22/08.

OPERATING DATA REPORT DOCKET: 388 PREPARER NAME: J. Hennings UNIT_NME: Susquehanna Unit 2 PREPARER TELEPHONE: 570-542-3747 RPT_PERIOD: 200804

1. Design Electrical Rating: 1182

2. Maximum Dependable Capacity (MWe-Net) 1140 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 179,620.25

4. Number of Hours Generator On-line 720.00 2,903.00 177,379.28

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 829,708.00 3,382,903.00 189,165,078.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The only power reduction greater than 20 % was for a planned Sequence Exchange on 4/26/08. Power was reduced to 77%, and returned to 100% on 4/27/08.

OPERATING DATA REPORT DOCKET: 388 PREPARER NAME: J. Hennings UNIT_NME: Susquehanna Unit 2 PREPARER TELEPHONE: 570-542-3747 RPT_PERIOD: 200805

1. Design Electrical Rating: 1182

2. Maximum Dependable Capacity (MWe-Net) 1140 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 180,364.25

4. Number of Hours Generator On-line 744.00 3,647.00 178,123.28

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 858,848.00 4,241,751.00 190,023,926.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

There were no power reductions greater than 20% this month.

OPERATING DATA REPORT DOCKET: 388 PREPARER NAME: J. Hennings UNIT_NME: Susquehanna Unit 2 PREPARER TELEPHONE: 570-542-3747 RPT_PERIOD: 200806

1. Design Electrical Rating: 1182

2. Maximum Dependable Capacity (MWe-Net) 1140 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 181,084.25

4. Number of Hours Generator On-line 720.00 4,367.00 178,843.28

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 808,857.00 5,050,608.00 190,832,783.30 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The only power reduction greater than 20% this month was on 06/28/08 down to 70% for a planned control rod sequence exchange.

Reactor power was increased to 100% on 06/30/08

OPERATING DATA REPORT DOCKET: 289 PREPARER NAME: Mark Fauber UNIT_NME: Three Mile Island Unit 1 PREPARER TELEPHONE: (717) 948-8787 RPT_PERIOD: 200804

1. Design Electrical Rating: 819

2. Maximum Dependable Capacity (MWe-Net) 802 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 211,464.41

4. Number of Hours Generator On-line 720.00 2,903.00 209,779.82

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 606,166.00 2,466,520.00 173,881,818.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at nominal full power for the entire month.

OPERATING DATA REPORT DOCKET: 289 PREPARER NAME: Mark Fauber UNIT_NME: Three Mile Island Unit 1 PREPARER TELEPHONE: (717) 948-8787 RPT_PERIOD: 200805

1. Design Electrical Rating: 819

2. Maximum Dependable Capacity (MWe-Net) 802 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 212,208.41

4. Number of Hours Generator On-line 744.00 3,647.00 210,523.82

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 622,685.00 3,089,205.00 174,504,503.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at nominal full power for the entire month with the exception of the period from 21:59 on 5/30/08 to 04:17 on 5/31/08, when power was reduced to approximately 87% for main turbine control valve testing.

OPERATING DATA REPORT DOCKET: 289 PREPARER NAME: Mark Fauber UNIT_NME: Three Mile Island Unit 1 PREPARER TELEPHONE: (717) 948-8787 RPT_PERIOD: 200806

1. Design Electrical Rating: 819

2. Maximum Dependable Capacity (MWe-Net) 802 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 212,928.41

4. Number of Hours Generator On-line 720.00 4,367.00 211,243.82

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 593,699.00 3,682,904.00 175,098,202.40 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated at nominal full power for the entire month. Losses have been classified as planned based on the Exelon Nuclear Production model.

OPERATING DATA REPORT DOCKET: 250 PREPARER NAME: R.L. Everett UNIT_NME: Turkey Point Unit 3 PREPARER TELEPHONE: 305-246-6190 RPT_PERIOD: 200804

1. Design Electrical Rating: 720

2. Maximum Dependable Capacity (MWe-Net) 693 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,766.99 236,275.42

4. Number of Hours Generator On-line 720.00 2,756.80 233,441.91

5. Reserve Shutdown Hours 0.00 0.00 121.80

6. Net Electrical energy Generated (MWHrs) 519,425.00 1,986,982.00 153,627,916.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 3 operated at approximately 100% for the entire month.

OPERATING DATA REPORT DOCKET: 250 PREPARER NAME: R.L. Everett UNIT_NME: Turkey Point Unit 3 PREPARER TELEPHONE: 305-246-6190 RPT_PERIOD: 200805

1. Design Electrical Rating: 720

2. Maximum Dependable Capacity (MWe-Net) 693 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,510.99 237,019.42

4. Number of Hours Generator On-line 744.00 3,500.80 234,185.91

5. Reserve Shutdown Hours 0.00 0.00 121.80

6. Net Electrical energy Generated (MWHrs) 527,788.00 2,514,770.00 154,155,704.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 3 operated at approximately 100% power for the month.

OPERATING DATA REPORT DOCKET: 250 PREPARER NAME: R.L. Everett UNIT_NME: Turkey Point Unit 3 PREPARER TELEPHONE: 305-246-6190 RPT_PERIOD: 200806

1. Design Electrical Rating: 720

2. Maximum Dependable Capacity (MWe-Net) 693 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,230.99 237,739.42

4. Number of Hours Generator On-line 720.00 4,220.80 234,905.91

5. Reserve Shutdown Hours 0.00 0.00 121.80

6. Net Electrical energy Generated (MWHrs) 476,244.00 2,991,014.00 154,631,948.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 3 operated at approximately 100% power until it entered a planned Short Notice Outage on 6/27/08 to perform a balance shot on the #9 turbine bearing after elevated vibrations started increasing after a grid instability event. Unit 3 was returned to approximately 100% power on 6/30/08.

OPERATING DATA REPORT DOCKET: 251 PREPARER NAME: R.L. Everett UNIT_NME: Turkey Point Unit 4 PREPARER TELEPHONE: 305-246-6190 RPT_PERIOD: 200804

1. Design Electrical Rating: 720

2. Maximum Dependable Capacity (MWe-Net) 693 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 0.00 2,098.60 232,932.85

4. Number of Hours Generator On-line 0.00 2,065.32 228,165.62

5. Reserve Shutdown Hours 0.00 0.00 577.20

6. Net Electrical energy Generated (MWHrs) 0.00 1,472,234.00 151,775,914.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 20080 3/31/2008 S 720.00 C 4 Unit 4 cycle 24 RFO (end of cycle 23). The RFO 009 includes containment sump modifications, ERDADS replacement, and split pin replacement work.

SUMMARY

Unit 4 was in Cycle 24 Refueling Outage for the entire month.

OPERATING DATA REPORT DOCKET: 251 PREPARER NAME: R.L. Everett UNIT_NME: Turkey Point Unit 4 PREPARER TELEPHONE: 305-246-6190 RPT_PERIOD: 200805

1. Design Electrical Rating: 720

2. Maximum Dependable Capacity (MWe-Net) 693 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 535.55 2,634.15 233,468.40

4. Number of Hours Generator On-line 490.00 2,555.32 228,655.62

5. Reserve Shutdown Hours 0.00 0.00 577.20

6. Net Electrical energy Generated (MWHrs) 303,076.00 1,775,310.00 152,078,990.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 20080 3/31/2008 S 254.00 C 4 Unit 4 cycle 24 RFO (end of cycle 23). The RFO 009 includes containment sump modifications, ERDADS replacement, and split pin replacement work.

SUMMARY

Unit 4 ended Cycle 24 RFO on 5/11/08 and reached 100% power 5/17/08.

OPERATING DATA REPORT DOCKET: 251 PREPARER NAME: R.L. Everett UNIT_NME: Turkey Point Unit 4 PREPARER TELEPHONE: 305-246-6190 RPT_PERIOD: 200806

1. Design Electrical Rating: 720

2. Maximum Dependable Capacity (MWe-Net) 693 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,354.15 234,188.40

4. Number of Hours Generator On-line 720.00 3,275.32 229,375.62

5. Reserve Shutdown Hours 0.00 0.00 577.20

6. Net Electrical energy Generated (MWHrs) 509,877.00 2,285,187.00 152,588,867.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 4 operated at approximately 100% power for the month.

OPERATING DATA REPORT DOCKET: 271 PREPARER NAME: Greg Wallin UNIT_NME: Vermont Yankee Unit 1 PREPARER TELEPHONE: 802-451-3309 RPT_PERIOD: 200804

1. Design Electrical Rating: 617

2. Maximum Dependable Capacity (MWe-Net) 605 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 267,533.42

4. Number of Hours Generator On-line 720.00 2,903.00 263,722.42

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 421,705.00 1,781,169.00 130,182,432.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Date Activity Losses in MWe hours Type of Loss (S) or (F) 4/01-4/04/08 Power reduction for a condenser 27255.0 F tube leak 4/04/08 Power reduction for a rod pattern 31.0 S exchange 4/05/08 Power recuction for a rod pattern 73.0 S exchange 4/13/08 Recirc gate adjustment for trash 18.0 S rack backwash 4/22/08 Recirc gate adjustment for trash 2.0 S rack backwash Total Losses for the month were: 124.0 S 27255.0 F 27379.0

OPERATING DATA REPORT DOCKET: 271 PREPARER NAME: Greg Wallin UNIT_NME: Vermont Yankee Unit 1 PREPARER TELEPHONE: 802-451-3309 RPT_PERIOD: 200805

1. Design Electrical Rating: 617

2. Maximum Dependable Capacity (MWe-Net) 605 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 268,277.42

4. Number of Hours Generator On-line 744.00 3,647.00 264,466.42

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 454,881.00 2,236,050.00 130,637,313.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Date Activity Losses in MWHe Type of loss 05/26-05/31/08 Power reduction for Project 7943.0 scheduled SAVE (low river flow considerations) as directed by ISO-NE

OPERATING DATA REPORT DOCKET: 271 PREPARER NAME: Greg Wallin UNIT_NME: Vermont Yankee Unit 1 PREPARER TELEPHONE: 802-451-3309 RPT_PERIOD: 200806

1. Design Electrical Rating: 617

2. Maximum Dependable Capacity (MWe-Net) 605 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 268,997.42

4. Number of Hours Generator On-line 720.00 4,367.00 265,186.42

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 426,842.00 2,662,892.00 131,064,155.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Date Activity Losses in MW hours Type of Losses (S) or (F) 06/07/08 Power reduction to maintain condenser backpressure <5 inches due to closed cycle operations for chlorination 270.0 MWe S 06/11/08 Power reduction for a rod pattern exchange, turbine quarterly and stop valve testing, plus MSIV testing 5485.0 MWe S 06/12-06/30/08 Power production losses due to condenser cleanliness 2135.0 MWe S 06/13/08 Power reduction for a rod pattern adjustment 80.0 MWe S 06/14/08 Power reduction for a rod pattern adjustment 306.0 MWe S 06/19/08 Power reduction for chlorination 174.0 MWe S 06/22/08 Power reduction for chlorination 105.0 MWe S 06/25/08 A CWBP valve binding. Power reduction to maintain Cond B/P <5 inches 777.0 MWe F 06/27/08 Power reduction for a rod pattern adjustment 17.0 MWe S 06/29/08 Power reduction for chlorination 124.0 MWe S Total Losses for the month were: 8696.0 MWe S 777.0 MWe F 9473.0 MWe

OPERATING DATA REPORT DOCKET: 424 PREPARER NAME: Amy Whaley UNIT_NME: Vogtle Unit 1 PREPARER TELEPHONE: 706-826-3858 RPT_PERIOD: 200804

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1109 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 191.85 1,992.85 165,407.21

4. Number of Hours Generator On-line 146.35 1,947.35 163,627.36

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 123,134.20 2,161,531.20 184,671,571.20 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 2008- 3/16/2008 S 573.65 C 4 1R14 begins as scheduled.

01

SUMMARY

On April 01 at 00:00, Unit 1 remained shutdown for 1R14. There was an unplanned outage schedule extension from April 24 at 01:39 to April 24 at 21:39. Unit 1 began ramping up following 1R14 on April 24 at 21:39. The turbine was tripped for the planned turbine overspeed test on April 24 at 22:58. Unit 1 ramp up began on April 25 at 00:34 and completed on April 30 at 01:47. On April 30 at 07:20 began unplanned derate for 5A Feedwater Heater Normal Level Control Valve (NLCV) issue. Unit 1 rampup following 5A Feedwater Heater NLCV work was on April 30 from 08:05 to 13:05. The unit was at maximum operating power on April 30 at 23:59.

OPERATING DATA REPORT DOCKET: 424 PREPARER NAME: Amy Whaley UNIT_NME: Vogtle Unit 1 PREPARER TELEPHONE: 706-826-3858 RPT_PERIOD: 200805

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1109 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 2,736.85 166,151.21

4. Number of Hours Generator On-line 744.00 2,691.35 164,371.36

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 874,910.00 3,036,441.20 185,546,481.20 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 1 was at maximum operating power with no significant operating problems during the month of May 2008.

OPERATING DATA REPORT DOCKET: 424 PREPARER NAME: Amy Whaley UNIT_NME: Vogtle Unit 1 PREPARER TELEPHONE: 706-826-3858 RPT_PERIOD: 200806

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1109 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,456.85 166,871.21

4. Number of Hours Generator On-line 720.00 3,411.35 165,091.36

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 837,554.00 3,873,995.20 186,384,035.20 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

On June 01 at 00:00, Unit 1 was at maximum operating power with no significant operating problems. On June 11 at 14:11, Unit 1 began a derate for a communication problem with the ultrasonic flow measuring device. On June 11 at 14:58, Unit 1 began to ramp up after the communication problem and completed the ramp up at 20:23. On June 30th at 23:59, Unit 1 was at maximum operating power.

OPERATING DATA REPORT DOCKET: 425 PREPARER NAME: Amy Whaley UNIT_NME: Vogtle Unit 2 PREPARER TELEPHONE: 706-826-3858 RPT_PERIOD: 200804

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1127 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,903.00 150,843.62

4. Number of Hours Generator On-line 720.00 2,903.00 149,664.21

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 827,373.60 3,361,778.60 169,694,746.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 was at maximum operating power with no significant operating problems during the month of April 2008.

OPERATING DATA REPORT DOCKET: 425 PREPARER NAME: Amy Whaley UNIT_NME: Vogtle Unit 2 PREPARER TELEPHONE: 706-826-3858 RPT_PERIOD: 200805

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1127 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 744.00 3,647.00 151,587.62

4. Number of Hours Generator On-line 744.00 3,647.00 150,408.21

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 850,839.00 4,212,617.60 170,545,585.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 was at maximum operating power with no significant operating problems during the month of May 2008.

OPERATING DATA REPORT DOCKET: 425 PREPARER NAME: Amy Whaley UNIT_NME: Vogtle Unit 2 PREPARER TELEPHONE: 706-826-3858 RPT_PERIOD: 200806

1. Design Electrical Rating: 1169

2. Maximum Dependable Capacity (MWe-Net) 1127 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 4,367.00 152,307.62

4. Number of Hours Generator On-line 720.00 4,367.00 151,128.21

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 814,472.00 5,027,089.60 171,360,057.60 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

Unit 2 was at maximum operating power during the month of June.

OPERATING DATA REPORT DOCKET: 382 PREPARER NAME: Greg Scott UNIT_NME: Waterford Unit 3 PREPARER TELEPHONE: (504)739-6703 RPT_PERIOD: 200804

1. Design Electrical Rating: 1173

2. Maximum Dependable Capacity (MWe-Net) 1152 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 623.97 2,806.97 173,276.33

4. Number of Hours Generator On-line 623.97 2,806.97 171,806.30

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 736,948.00 3,330,266.00 186,162,001.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments PO- 4/26/2008 S 96.03 C 1 The unit was taken off-line using normal operating 08-01 procedures to conduct planned Refueling Outage

15. The unit was restored to service and synchronized to the grid using normal operating procedures.

SUMMARY

The unit operated at an average reactor power level of 86.5%. A planned shutdown was performed on April 26, 2008 using normal operating procedures to conduct Refueling Outage 15. The unit remained off-line for the remainder of April.

OPERATING DATA REPORT DOCKET: 382 PREPARER NAME: Greg Scott UNIT_NME: Waterford Unit 3 PREPARER TELEPHONE: (504)739-6703 RPT_PERIOD: 200805

1. Design Electrical Rating: 1173

2. Maximum Dependable Capacity (MWe-Net) 1152 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 5.83 2,812.80 173,282.16

4. Number of Hours Generator On-line 0.00 2,806.97 171,806.30

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 0.00 3,330,266.00 186,162,001.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments PO- 4/26/2008 S 744.00 C 4 The unit was taken off-line using normal operating 08-01 procedures to conduct planned Refueling Outage

15. The unit was restored to service and synchronized to the grid using normal operating procedures.

SUMMARY

The unit remained off-line the month of May 2008 to conduct Refueling Outage 15.

OPERATING DATA REPORT DOCKET: 382 PREPARER NAME: Greg Scott UNIT_NME: Waterford Unit 3 PREPARER TELEPHONE: (504)739-6703 RPT_PERIOD: 200806

1. Design Electrical Rating: 1173

2. Maximum Dependable Capacity (MWe-Net) 1152 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,532.80 174,002.16

4. Number of Hours Generator On-line 704.98 3,511.95 172,511.28

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 784,600.00 4,114,866.00 186,946,601.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments PO- 4/26/2008 S 10.58 C 4 The unit was taken off-line using normal operating 08-01 procedures to conduct planned Refueling Outage

15. The unit was restored to service and synchronized to the grid using normal operating procedures.

FO- 6/2/2008 F 4.43 A 5 During power ascension following Refuel Outage 08-01 15, the unit was shutdown to repair a steam leak from a test connection on the Main Turbine. The leak was repaired within five hours and the power ascension was resumed.

SUMMARY

The unit began the month off-line to continue Refueling Outage 15 and was synchronized to the grid on June 1, 2008. An unplanned outage was performed on June 2, 2008 to repair a steam leak on a Main Turbine test connection, and the unit was synchronized to the grid on June 3, 2008.

The plant operated at an average reactor power level of 93.6%.

OPERATING DATA REPORT DOCKET: 390 PREPARER NAME: M. G. Long UNIT_NME: Watts Bar Unit 1 PREPARER TELEPHONE: 423-365-1434 RPT_PERIOD: 200804

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1121 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 1,884.18 94,142.05

4. Number of Hours Generator On-line 720.00 1,867.15 93,701.01

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 837,789.00 2,093,138.53 104,558,900.13 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 390 PREPARER NAME: M. G. Long UNIT_NME: Watts Bar Unit 1 PREPARER TELEPHONE: 423-365-1434 RPT_PERIOD: 200805

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1121 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 564.27 2,448.45 94,706.32

4. Number of Hours Generator On-line 546.05 2,413.20 94,247.06

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 581,768.00 2,674,906.53 105,140,668.13 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments Forced 5/17/2008 F 197.95 A 1 Forced Outage to repair stator cooling water system leak Outag e

SUMMARY

Forced Outage 05/17/08 thru 05/25/08 to repair stator cooling water system leak.

OPERATING DATA REPORT DOCKET: 390 PREPARER NAME: M. G. Long UNIT_NME: Watts Bar Unit 1 PREPARER TELEPHONE: 423-365-1434 RPT_PERIOD: 200806

1. Design Electrical Rating: 1155

2. Maximum Dependable Capacity (MWe-Net) 1121 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 3,168.45 95,426.32

4. Number of Hours Generator On-line 720.00 3,133.20 94,967.06

5. Reserve Shutdown Hours 0.00 0.00 0.00

6. Net Electrical energy Generated (MWHrs) 790,206.00 3,465,112.53 105,930,874.13 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

OPERATING DATA REPORT DOCKET: 482 PREPARER NAME: D. M. Hooper UNIT_NME: Wolf Creek Unit 1 PREPARER TELEPHONE: 620 364-4041 RPT_PERIOD: 200804

1. Design Electrical Rating: 1170

2. Maximum Dependable Capacity (MWe-Net) 1160 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 0.00 1,733.82 172,498.21

4. Number of Hours Generator On-line 0.00 1,710.41 171,129.38

5. Reserve Shutdown Hours 0.00 0.00 339.80

6. Net Electrical energy Generated (MWHrs) 0.00 2,010,407.00 195,664,654.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-02 3/17/2008 F 720.00 A 4 The unit was manually taken off-line due to indications of problems with the feedwater system -

electrical transformer PB03. Transition to the outage began on March 20, 2008 at 0800.

SUMMARY

Refuel 16 began on March 20th, 2008 at 0800 and continued through the month of April 2008. Outage extension began on April 23 2008 and is still ongoing.

OPERATING DATA REPORT DOCKET: 482 PREPARER NAME: D. M. Hooper UNIT_NME: Wolf Creek Unit 1 PREPARER TELEPHONE: 620 364-4041 RPT_PERIOD: 200805

1. Design Electrical Rating: 1170

2. Maximum Dependable Capacity (MWe-Net) 1160 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 429.95 2,163.77 172,928.16

4. Number of Hours Generator On-line 418.28 2,128.69 171,547.66

5. Reserve Shutdown Hours 0.00 0.00 339.80

6. Net Electrical energy Generated (MWHrs) 437,666.00 2,448,073.00 196,102,320.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments 08-02 3/17/2008 F 325.72 A 4 The unit was manually taken off-line due to indications of problems with the feedwater system -

electrical transformer PB03. Transition to the outage began on March 20, 2008 at 0800.

SUMMARY

Refuel 16 began on March 20th, 2008 at 0800 and continued through the month of April 2008. Outage extension began on April 23, 2008 and ended May 14th, 2008 at 1343 with the unit operating at or near 100% power through the end of May, 2008.

OPERATING DATA REPORT DOCKET: 482 PREPARER NAME: D. M. Hooper UNIT_NME: Wolf Creek Unit 1 PREPARER TELEPHONE: 620 364-4041 RPT_PERIOD: 200806

1. Design Electrical Rating: 1170

2. Maximum Dependable Capacity (MWe-Net) 1160 This Month Yr-to-Date Cumulative

3. Number of Hours the Reactor was Critical 720.00 2,883.77 173,648.16

4. Number of Hours Generator On-line 720.00 2,848.69 172,267.66

5. Reserve Shutdown Hours 0.00 0.00 339.80

6. Net Electrical energy Generated (MWHrs) 846,724.00 3,294,797.00 196,949,044.00 UNIT SHUTDOWNS Type Method of F: Forced Duration Shutting Cause - Corrective Action No. Date S: Scheduled (Hours) Reason 1 Down 2 Comments

SUMMARY

The unit operated in Mode 1, at or near 100% power, from June 1, 2008, through June 30, 2008.

ML082190013

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