ML061570234

RAI, Regarding 2005 Steam Generator Tube Inspections

ML061570234
Person / Time
Site:	Saint Lucie
Issue date:	06/16/2006
From:	Moroney B NRC/NRR/ADRO/DORL/LPLD
To:	Stall J Florida Power & Light Co
Moroney B, NRR/DORL, 415-3974
References
TAC MC9192
Download: ML061570234 (4)

Text

June 16, 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 PLANT, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING 2005 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MC9192)

Dear Mr. Stall:

By letters dated February 11, 2005 (Agencywide Documents Access and Management System Accession Number ML0530550032), June 15, 2005 (ML051720461), and November 28, 2005 (ML053410482), Florida Power & Light Company, et al. (the licensee), submitted information summarizing the results of the 2005 steam generator tube inspections at St. Lucie Unit 2.

These inspections were performed during the SL2-15 refueling outage. In addition to these reports, the U.S. Nuclear Regulatory Commission (NRC) staff participated in a conference call concerning the 2005 steam generator tube inspections at St. Lucie Unit 2. This conference call was summarized by the staff in a letter dated April 8, 2005 (ML051030078).

In order to complete its review of the SG inspection reports, the NRC staff has determined that more information is needed. Enclosed is the Request for Additional Information. This request was discussed with Mr. Ken Frehafer of your staff on May 30, 2006, and it was agreed that a response would be provided within 60 days from the receipt of this letter.

If you have any questions, please feel free to 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. 50-389

Enclosure:

As stated cc w/encl: See next page

Mr. J. A. Stall ST. LUCIE PLANT Florida Power and Light Company cc:

Mr. William E. Webster Mr. Christopher R. Costanzo Vice President, Nuclear Operations Acting Plant General Manager Florida Power & Light Company St. Lucie Nuclear Plant P.O. Box 14000 6351 South Ocean Drive Juno Beach, FL 33408-0420 Jensen Beach, Florida 34957 Senior Resident Inspector Mr. Terry Patterson St. Lucie Plant Licensing Manager U.S. Nuclear Regulatory Commission St. Lucie Nuclear Plant P.O. Box 6090 6351 South Ocean Drive Jensen Beach, Florida 34957 Jensen Beach, Florida 34957 Craig Fugate, Director Mark Warner, Vice President Division of Emergency Preparedness Nuclear Operations Support Department of Community Affairs Florida Power & Light Company 2740 Centerview Drive P.O. Box 14000 Tallahassee, Florida 32399-2100 Juno Beach, FL 33408-0420 M. S. Ross, Managing Attorney Mr. Rajiv S. Kundalkar Florida Power & Light Company Vice President - Nuclear Engineering P.O. Box 14000 Florida Power & Light Company Juno Beach, FL 33408-0420 P.O. Box 14000 Juno Beach, FL 33408-0420 Marjan Mashhadi, Senior Attorney Florida Power & Light Company Mr. J. Kammel 801 Pennsylvania Avenue, NW. Radiological Emergency Suite 220 Planning Administrator Washington, DC 20004 Department of Public Safety 6000 Southeast Tower Drive Mr. Douglas Anderson Stuart, Florida 34997 County Administrator St. Lucie County Mr. Bill Parks 2300 Virginia Avenue Acting Operations Manager Fort Pierce, Florida 34982 St. Lucie Nuclear Plant 6351 South Ocean Drive Mr. William A. Passetti, Chief Jensen Beach, Florida 34957-2000 Department of Health Bureau of Radiation Control 2020 Capital Circle, SE, Bin #C21 Tallahassee, Florida 32399-1741 Mr. Gordon L. Johnston Acting Vice President St. Lucie Nuclear Plant 6351 South Ocean Drive Jensen Beach, Florida 34957-2000

June 16, 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 PLANT, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING 2005 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MC9192)

Dear Mr. Stall:

By letters dated February 11, 2005 (Agencywide Documents Access and Management System Accession Number ML0530550032), June 15, 2005 (ML051720461), and November 28, 2005 (ML053410482), Florida Power & Light Company, et al. (the licensee), submitted information summarizing the results of the 2005 steam generator tube inspections at St. Lucie Unit 2.

These inspections were performed during the SL2-15 refueling outage. In addition to these reports, the U.S. Nuclear Regulatory Commission (NRC) staff participated in a conference call concerning the 2005 steam generator tube inspections at St. Lucie Unit 2. This conference call was summarized by the staff in a letter dated April 8, 2005 (ML051030078).

In order to complete its review of the SG inspection reports, the NRC staff has determined that more information is needed. Enclosed is the Request for Additional Information. This request was discussed with Mr. Ken Frehafer of your staff on May 30, 2006, and it was agreed that a response would be provided within 60 days from the receipt of this letter.

If you have any questions, please feel free to 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. 50-389

Enclosure:

As stated cc w/encl: See next page Distribution:

PUBLIC LPL2-2 R/F RidsNrrPMBMoroney RidsNrrDorlLpl2-2 RidsNrrLABClayton RidsOgcRp RidsAcrsAcnwMailCenter RidsNrrDciCsgb RidsRgn2MailCenter MYoder, NRR ADAMS ACCESSION No.: ML061570234 NRR-088 OFFICE LPL2-2/PM LPL2-2/LA CSGB/BC LPL2-2/BC NAME BMoroney BClayton EMurphy (Acting) MMarshall by memo dated DATE 6 / 8 /06 6 / 7 /06 3 / 19 /06 6 / 16 /06 OFFICIAL RECORD COPY

REQUEST FOR ADDITIONAL INFORMATION ST. LUCIE NUCLEAR PLANT, UNIT 2 2005 STEAM GENERATOR TUBE INSPECTIONS

1. During the 2005 steam generator tube inspections a number of indications were coded as retest for clarification (RCL) because they were identified with a rotating probe as it was being removed from the tube at a rate greater than the rate at which the probe is qualified. The indications in question had not been identified during bobbin coil inspection. The Nuclear Regulatory Commission staff discussed these indications with representatives from St. Lucie during a conference call at the time of the outage. During the call the staff made several observations concerning the disposition of these flaws (refer to pages 5 and 6 of the Conference Call Summary dated, April 8, 2005 (ML50730197)). In light of these observations, summarize your basis for the approach taken to disposition the RCLs during your 2005 inspections.

2. A freespan axial indication was identified in the square bend region of steam generator B (R44C130). Has freespan cracking been identified in areas other than the square bend? If so, discuss the locations of the indications and the number of tubes affected.

3. Please discuss whether any crack-like indications were identified in the u-bend region of the low row tubes. If so, discuss the location and orientation of the indications and the basis for not expanding the scope of the inspection.

4. Please discuss whether any crack-like indications were identified in dents or dings? If so, discuss the size, location, and orientation of the flaw and the voltage amplitude of the dent/ding.

5. It is the staffs understanding that axial cracks have been identified in wear scars at St. Lucie 2. Please discuss whether there are any trends associated with the development of these cracks. For example, are the cracks more prevalent in the hot-leg or cold-leg side of the steam generator? Are the cracks associated with deeper wear scars?

6. Please discuss whether any crack-like indications were identified on the cold-leg side of the steam generator other than those identified at the eggcrate support and the diagonal strap.

Enclosure