ML060040221
| ML060040221 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 01/13/2006 |
| From: | Moroney B Plant Licensing Branch III-2 |
| To: | Stall J Florida Power & Light Co |
| Moroney B, NRR/DLPM, 415-3974 | |
| References | |
| TAC MC6764 | |
| Download: ML060040221 (4) | |
Text
January 13, 2006 Mr. J. A. Stall Senior Vice President, Nuclear and Chief Nuclear Officer Florida Power and Light Company P.O. Box 14000 Juno Beach, Florida 33408-0420
SUBJECT:
ST. LUCIE UNIT 1 - REVIEW OF THE ST. LUCIE UNIT 1 STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT FOR THE SPRING 2004 OUTAGE (TAC NO. MC6764)
Dear Mr. Stall:
By letters dated April 13, 2004, and April 8 and November 9, 2005, Florida Power & Light Company (the licensee) submitted reports summarizing the steam generator tube inspections performed during the spring 2004 refueling outage (SL1-19) at St. Lucie Unit 1. The results of the U.S. Nuclear Regulatory Commission (NRC) staff review of these documents is summarized below.
St. Lucie Unit 1 has two recirculating steam generators designed and fabricated by Babcock and Wilcox International. The steam generators were put into service in 1998 during the SL1-15 refueling outage. Each steam generator has 8523 thermally treated Alloy 690 tubes that have an outside diameter of 0.75 inch and a nominal wall thickness of 0.045 inch. The tubes were manufactured by Sumitomo Special Metals. The tubes are arranged in a triangular pattern with a spacing of approximately 1.0 inch. The tubes were hydraulically expanded at each end for the full depth of the tubesheet. The tubesheet is 21.5-inches thick (with the clad the tubesheet is 21.875-inches thick). The tubes are supported by lattice grid tube supports and fan bars (the lowest most fan bar is also referred to as a collector bar since all other fan bars connect to it). All supports are constructed from type 410 stainless steel. The U-bend region of the tubes in rows 1 through 20 received a supplemental thermal treatment (stress relieving) after bending. The smallest U-bend radius occurs in Row 3 and is 3.905 inches. The Row 1 U-bend radius measures 4.272 inches.
The licensee provided the scope, extent, methods, and results of their steam generator tube inspections in the documents referenced above. In addition, the licensee described corrective actions (e.g., tube plugging or repair) taken in response to the inspection findings. Based on a review of the information provided, the NRC staff concludes that the licensee provided the information required by their technical specifications. In addition, the staff concludes that there are no technical issues that warrant follow-up action at this time since the inspections appear to be consistent with the objective of detecting potential tube degradation and the inspection results appear to be consistent with industry operating experience at similarly designed and operated units.
J. Stall January 13, 2006 This completes NRC staffs efforts under TAC No. MC6764. If you have any questions regarding this matter, 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. 50-335 cc: See next page
Mr. J. A. Stall ST. LUCIE PLANT Florida Power and Light Company cc:
Senior Resident Inspector St. Lucie Plant U.S. Nuclear Regulatory Commission P.O. Box 6090 Jensen Beach, Florida 34957 Craig Fugate, Director Division of Emergency Preparedness Department of Community Affairs 2740 Centerview Drive Tallahassee, Florida 32399-2100 M. S. Ross, Managing Attorney Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420 Marjan Mashhadi, Senior Attorney Florida Power & Light Company 801 Pennsylvania Avenue, NW.
Suite 220 Washington, DC 20004 Mr. Douglas Anderson County Administrator St. Lucie County 2300 Virginia Avenue Fort Pierce, Florida 34982 Mr. William A. Passetti, Chief Department of Health Bureau of Radiation Control 2020 Capital Circle, SE, Bin #C21 Tallahassee, Florida 32399-1741 Mr. William Jefferson, Jr.
Site Vice President St. Lucie Nuclear Plant 6351 South Ocean Drive Jensen Beach, Florida 34957-2000 Mr. G. L. Johnston Plant General Manager St. Lucie Nuclear Plant 6351 South Ocean Drive Jensen Beach, Florida 34957 Mr. Terry Patterson Licensing Manager St. Lucie Nuclear Plant 6351 South Ocean Drive Jensen Beach, Florida 34957 Mark Warner, Vice President Nuclear Operations Support Florida Power and Light Company P.O. Box 14000 Juno Beach, FL 33408-0420 Mr. Rajiv S. Kundalkar Vice President - Nuclear Engineering Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420 Mr. J. Kammel Radiological Emergency Planning Administrator Department of Public Safety 6000 Southeast Tower Drive Stuart, Florida 34997
ML060040221 NRR-106 OFFICE LPL2-2/PM LPL2-2/LA CSGB/BC LPL2-2/BC NAME BMoroney BClayton AHiser by memo dated MMarshall DATE 1/ 9/06 1/5/06 12/12/2005 1/13/06