ML082020005
| ML082020005 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 07/21/2008 |
| From: | Moroney B NRC/NRR/ADRO/DORL/LPLII-2 |
| To: | Campbell W Tennessee Valley Authority |
| Moroney B, NRR/DORL, 415-3974 | |
| References | |
| TAC MD8755 | |
| Download: ML082020005 (4) | |
Text
July 21, 2008 Mr. William R. Campbell, Jr.
Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801
SUBJECT:
SEQUOYAH NUCLEAR PLANT, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION REGARDING STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT FOR THE CYCLE 15 REFUELING OUTAGE (TAC NO. MD8755)
Dear Mr. Campbell:
By letter dated April 23, 2008, Tennessee Valley Authority (TVA) submitted information summarizing the results of the fall 2007 steam generator (SG) tube inspections performed at Sequoyah Nuclear Plant Unit 1 during the Cycle 15 refueling outage.
In order for the staff to complete its review of the information provided, we request that TVA provide responses to the enclosed request for additional information (RAI). Based on discussions with your staff, we understand that you plan to respond to the enclosed RAI within 30 days of receipt.
If you have any questions about this material, please contact me at (301) 415-3974.
Sincerely,
/RA/
Brendan T. Moroney, Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-327
Enclosure:
Request for Additional Information cc: See next page
ML082020005 NRR-088 OFFICE LPL2-2/PM LPL2-2/LA CSGB/BC LPL2-2/BC NAME BMoroney RSola AHiser (By memo) TBoyce DATE 07/21/08 07/21/08 6 /19 /08 07/21/08
REQUEST FOR ADDITIONAL INFORMATION STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT FOR THE CYCLE 15 REFUELING OUTAGE SEQUOYAH NUCLEAR PLANT, UNIT 1 By letter dated April 23, 2008, Tennessee Valley Authority submitted information summarizing the results of the fall 2007 steam generator (SG) tube inspections performed at Sequoyah Nuclear Plant Unit 1 during the Cycle 15 refueling outage. In order for the staff to complete its review, the following additional information is requested:
- 1. For each refueling outage and SG tube inspection since installation of the SGs, please provide the cumulative effective full power years that the SGs have operated.
- 2. Please discuss the scope and results of any secondary side inspections.
- 3. It was indicated that the scope of the bobbin coil examinations were expanded in SGs 1, 2, and 3. Please discuss the reason for expanding the scope of inspection in these three SGs.
- 4. Please discuss what types of indications/locations are included in the diagnostic
+PointTM inspections. Please discuss how you concluded that the bobbin indications were a result of U-bend wear (i.e., were rotating probe inspections (or comparable inspections) performed at these locations to permit characterization of the bobbin signal so as to confirm that there was a volumetric indication associated with the tube support contact points?).
Enclosure
William R. Campbell, Jr. SEQUOYAH NUCLEAR PLANT Tennessee Valley Authority cc:
Mr. Ashok S. Bhatnagar Senior Vice President Mr. James D. Smith, Manager Nuclear Generation Development Licensing and Industry Affairs and Construction Sequoyah Nuclear Plant Tennessee Valley Authority Tennessee Valley Authority 6A Lookout Place P.O. Box 2000 1101 Market Street Soddy Daisy, TN 37384-2000 Chattanooga, TN 37402-2801 Mr. Christopher R. Church, Plant Manager Vice President Sequoyah Nuclear Plant Nuclear Support Tennessee Valley Authority Tennessee Valley Authority P.O. Box 2000 3R Lookout Place Soddy Daisy, TN 37384-2000 1101 Market Street Chattanooga, TN 37402-2801 Senior Resident Inspector Sequoyah Nuclear Plant Mr. H. Rick Rogers U.S. Nuclear Regulatory Commission Vice President 2600 Igou Ferry Road Nuclear Engineering & Technical Services Soddy Daisy, TN 37379 Tennessee Valley Authority 3R Lookout Place Mr. Lawrence E. Nanney, Director 1101 Market Street TN Dept. of Environment & Conservation Chattanooga, TN 37402-2801 Division of Radiological Health Third Floor, L and C Annex Mr. Timothy P. Cleary, Site Vice President 401 Church Street Sequoyah Nuclear Plant Nashville, TN 37243-1532 Tennessee Valley Authority P.O. Box 2000 County Mayor Soddy Daisy, TN 37384-2000 Hamilton County Courthouse Chattanooga, TN 37402-2801 General Counsel Tennessee Valley Authority Mr. Larry E. Nicholson, General Manager 6A West Tower Performance Improvement 400 West Summit Hill Drive Tennessee Valley Authority Knoxville, TN 37902 3R Lookout Place 1101 Market Street Mr. John C. Fornicola, Manager Chattanooga, TN 37402-2801 Nuclear Assurance Tennessee Valley Authority Mr. Michael A. Purcell 3R Lookout Place Senior Licensing Manager 1101 Market Street Nuclear Power Group Chattanooga, TN 37402-2801 Tennessee Valley Authority 4X Blue Ridge Ms. Beth A. Wetzel, Manager 1101 Market Street Corporate Nuclear Licensing and Chattanooga, TN 37402-2801 Industry Affairs Tennessee Valley Authority Ms. Ann P. Harris 4X Blue Ridge 341 Swing Loop Road 1101 Market Street Rockwood, TN 37854 Chattanooga, TN 37402-2801