ML021760148

May 2002 Monthly Operating Report for Sequoyah Nuclear Plant

ML021760148
Person / Time
Site:	Sequoyah
Issue date:	06/13/2002
From:	Salas P Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML021760148 (6)

Text

June 13, 2002 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 SEQUOYAH NUCLEAR PLANT - MAY MONTHLY OPERATING REPORT The enclosure provides the May Monthly Operating Report as required by Sequoyah Technical Specifications Section 6.9.1.10.

This letter is being sent in accordance with NRC RIS 2001-05.

If you have any questions concerning this matter, please call me at (423) 843-7170 or J. D. Smith at (423) 843-6672.

Sincerely, Original signed by Pedro Salas Licensing and Industry Affairs Manager Enclosure

ENCLOSURE TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT (SQN)

MONTHLY OPERATING REPORT MAY 2002 UNIT 1 DOCKET NUMBER 50-327 LICENSE NUMBER DPR-77 UNIT 2 DOCKET NUMBER 50-328 LICENSE NUMBER DPR-79

OPERATING DATA REPORT Docket No. 50-327 Unit Name SQN Unit 1 Date June 5, 2002 Completed By T. J. Hollomon/Renee McKaig Telephone (423) 843-7528 Reporting Period

1. Design Electrical Rating (Net MWe): 1148

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

3. Number of Hours Reactor was Critical 744.0 3,623.0 120,328.8

4. Hours Generator On-Line 744.0 3,623.0 118,403.6

5. Unit Reserve Shutdown Hours 0.0 0.0 0.0

6. Net Electrical Energy Generated (MWh) 849,332 4,158,358 128,488,918 Docket No. 50-328 Unit Name SQN Unit 2 Date June 5, 2002 Completed By T. J. Hollomon/Renee McKaig Telephone (423) 843-7528 Reporting Period

1. Design Electrical Rating (Net MWe): 1148

2. Maximum Dependable Capacity (MWe-Net): 1117 Month Yr-to-Date Cumulative

3. Number of Hours Reactor was Critical 268.8 2,763.6 124,270.0

4. Hours Generator On-Line 206.9 2,701.7 122,155.8

5. Unit Reserve Shutdown Hours 0.0 0.0 0.0

6. Net Electrical Energy Generated (MWh) 170,215 3,014,847 130,196,907 E-1

UNIT SHUTDOWNS DOCKET NO: 50-327 UNIT NAME: SQN-1 DATE: June 5, 2002 COMPLETED BY: T. J. Hollomon/Renee McKaig TELEPHONE: (423) 843-7528 REPORT PERIOD: MAY 2002 No. Date Type Duration Reason Method of Cause and Corrective Action to Prevent Recurrence F:Forced 1 (Hours) Shutting S:Scheduled Down Reactor2 No power reductions of greater than 20 percent during May 2002.

Summary : Unit 1 operated at 100 percent power throughout the month of May with a capacity factor of 102 percent.

No PORVs or safety valves were challenged in May.

1 2 Reason: Method A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Trip/Scram C-Refueling 3-Automatic Trip/Scram D-Regulatory Restriction 4-ContinuationOutage E-Operator Training / License Examination 5-Other (Explain)

F-Administrative G-Operational Error (Explain)

H- Other (Explain)

UNIT SHUTDOWNS DOCKET NO: 50-327 UNIT NAME: SQN-2 DATE: June 5, 2002 COMPLETED BY: T. J. Hollomon/Renee McKaig TELEPHONE: (423) 843-7528 REPORT PERIOD: MAY 2002 No. Date Type Duration Reason Method of Cause and Corrective Action to Prevent Recurrence F:Forced 1 (Hours) Shutting S:Scheduled Down Reactor2 1 020501 S 479.1 C 1 Unit 2 was in U2C11 refueling outage at the beginning of May.

outage ended at 2306 EDT on May 20, 2002. Unit 2 achieved 100 percent power at 0618 EDT on May 24, 2002.

2 020518 F A 2 During low power physics testing, being performed during the outage, a manual reactor trip was initiated because of a Rod Control System Urgent Failure Alarm on Shutdown Bank B and Control Bank D. This alarm appears to have been an intermittent failure of the multiplexing relay in the rod control system. The multiplexing relay was replaced.

Summary Unit 2 was in U2C11 refueling outage at the beginning of May. Unit 2 capacity factor for May was 21.7 percent.

No PORVs or safety valves were challenged in May.

1 2 Reason: Method A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Trip/Scram C-Refueling 3-Automatic Trip/Scram D-Regulatory Restriction 4-ContinuationOutage E-Operator Training / License Examination 5-Other (Explain)

F-Administrative G-Operational Error (Explain)

H- Other (Explain)

UNIT SHUTDOWNS DOCKET NO: 50-328 UNIT NAME: SQN-2 DATE: June 5, 2002 COMPLETED BY: T. J. Hollomon/Renee McKaig TELEPHONE: (423) 843-7528 REPORT PERIOD: MAY 2002 No. Date Type Duration Reason Method of Cause and Corrective Action to Prevent Recurrence F:Forced 1 (Hours) Shutting S:Scheduled Down Reactor2 3 020528 F 35.3 B 5 A power reduction was initiated at 2123 EDT on May 28, 2002 and the unit was taken offline at 0553 EDT on May 29, 2002, because of elevated temperature on the B and C main bank transformers. The cause of the elevated transformer temperatures was the installation of incorrect o-rings on the top bushings on the transformers during the outage.

The correct o-rings were installed. The unit was returned to service at 1709 EDT on May 30, 2002.

4 020531 F 22.7 A 3 On May 31, 2002, at 0116 EDT Unit 2 experienced unplanned automatic SCRAM as a result of high stator cooling water temperature. The cause was the failure of the raw cooling water supply valve to the stator cooling water system. The valve was replaced.

Summary: See above.

1 2 Reason: Method A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Trip/Scram C-Refueling 3-Automatic Trip/Scram D-Regulatory Restriction 4-ContinuationOutage E-Operator Training / License Examination 5-Other (Explain)

F-Administrative G-Operational Error (Explain)

H- Other (Explain)