ML031050183
| ML031050183 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/14/2003 |
| From: | Salas P Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RIS-01-005 | |
| Download: ML031050183 (5) | |
Text
April 14, 2003 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 - MARCH MONTHLY OPERATING REPORT The enclosure provides the March Monthly Operating Report as required by Sequoyah Technical Specification 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 cc (Enclosure):
Mr. Michael L. Marshall, Jr., Senior Project Manager U.S. Nuclear Regulatory Commission MS O-8G9A One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2739
ENCLOSURE TENNESSEE VALLEY AUTHORITY SEQUOYAH NUCLEAR PLANT (SQN)
MONTHLY OPERATING REPORT MARCH 2003 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 April 9, 2003 Completed By Tanya Hollomon Telephone (423) 843-7528 Reporting Period MARCH 2003
- 1. Design Electrical Rating (Net MWe): 1160
- 2. Maximum Dependable Capacity (MWe-Net) 1125 Month Yr-to-Date Cumulative
- 3. Number of Hours Reactor was Critical 387.2 1,803.2 127,269.0
- 4. Hours Generator On-Line 387.2 1,803.2 125,343.8
- 5. Unit Reserve Shutdown Hours 0.0 0.0 0.0
- 6. Net Electrical Energy Generated (MWh) 440,279 2,072,987 136,357,077 Docket No. 50-328 Unit Name SQN Unit 2 Date April 9, 2003 Completed By Tanya Hollomon Telephone (423) 843-7528 Reporting Period MARCH 2003
- 1. Design Electrical Rating (Net MWe): 1160
- 2. Maximum Dependable Capacity (MWe-Net): 1126 Month Yr-to-Date Cumulative
- 3. Number of Hours Reactor was Critical 472.9 1,756.7 130,982.2
- 4. Hours Generator On-Line 433.3 1,711.3 128,808.9
- 5. Unit Reserve Shutdown Hours 0.0 0.0 0.0
- 6. Net Electrical Energy Generated (MWh) 448,781 1,903,937 137,628,039 E-1
UNIT SHUTDOWNS DOCKET NO: 50-327 UNIT NAME: SQN-1 DATE: April 9, 2003 COMPLETED BY: Tanya Hollomon TELEPHONE: (423) 843-7528 REPORT PERIOD: MARCH 2003 No. Date Type Duration Reason1 Method of Cause and Corrective Action to Prevent Recurrence F:Forced (Hours) Shutting S:Scheduled Down Reactor2 1 030317 S 356.8 C 1 Unit 1 was removed from service at 0312 on March 17 to enter U1C12 refueling outage. Core offload was completed on March 24 at 1858 EST.
Summary : Unit 1 gross maximum dependable capacity factor was 52.6 percent for the month of March. Unit 1 entered coastdown for the U1C12 refueling outage on March 3, 2003. The unit was taken offline on March 17 at 0312 EST for the outage and was defueled at the end of March.
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)
E-2
UNIT SHUTDOWNS DOCKET NO: 50-328 UNIT NAME: SQN-2 DATE: April 9, 2003 COMPLETED BY: Tanya Hollomon TELEPHONE: (423) 843-7528 REPORT PERIOD: MARCH 2003 No. Date Type Duration Reason1 Method of Cause and Corrective Action to Prevent Recurrence F:Forced (Hours) Shutting S:Scheduled Down Reactor2 2 030310 F 158.9 A 2 Initiated manual reactor scram following loss of the 2B hotwell pump and both No. 7 heater drain tank (HDT) pumps. The cause of this event was the tolerance of the off-normal condition of the No. 7 HDT outlet valve being dogged open coincident with the electrical failure of the 2B hotwell pump motor resulting in low and unstable condensate system pressure. The motor was replaced and the valve was repaired. The unit was returned to service.
3 030324 F 151.8 A 1 Initiated manual shutdown following indications of generator gas leakage into the stator cooling water system. A hydrogen gas pipe had developed a leak because of a manufacture defect and system vibration. The pipe was replaced and the system was returned to service.
Summary: Unit 2 gross maximum dependable capacity factor was 54.7 percent for the month of March. Unit 2 was operating at 100 percent power until March 10 when a manual reactor scram was initiated following loss of 2B hotwell pump and both No. 7 heater drain tank pumps. Unit 2 was returned to service and operating at 100 percent on March 19. On March 24 at 0854 EST a manual shutdown was initiated following indications of generator gas leakage into the stator cooling water system. Unit 2 was returned to service and operating at 95 percent power at the end of March.
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-Continuation Outage E-Operator Training / License Examination 5-Other (Explain)
F-Administrative G-Operational Error (Explain)
H- Other (Explain)
E-3