ML043440065

Steam Generator Tube Inspection Reports for the Spring 2004 Outage

ML043440065
Person / Time
Site:	South Texas
Issue date:	12/09/2004
From:	Jaffe D NRC/NRR/DLPM/LPD4
To:	Sheppard J South Texas
Jaffe D, NRR/DLPM, 415-1439
References
TAC MC3648
Download: ML043440065 (7)

Text

December 9, 2004 Mr. James J. Sheppard President and Chief Executive Officer STP Nuclear Operating Company South Texas Project Electric Generating Station P. O. Box 289 Wadsworth, TX 77483

SUBJECT:

SOUTH TEXAS PROJECT, UNIT 2 - RE: STEAM GENERATOR TUBE INSPECTION REPORTS FOR THE SPRING 2004 OUTAGE (TAC NO. MC3648)

Dear Mr. Sheppard:

By letters dated May 4, 2004 (ML041450308), June 16, 2004 (ML041730355), and November 11, 2004 (ML043230294), STP Nuclear Operating Company, the licensee, submitted information pertaining to its steam generator tube inspections for the spring 2004 outage at South Texas Project, Unit 2, in accordance with the Technical Specifications (TS). The U.S.

Nuclear Regulatory Commission (NRC) staff also reviewed the March 5, 2003 (ML030710429),

Preservice Inspection Summary Report for Tubing in Replacement Steam Generators -

2RE09.

The NRC has completed its review of these reports and concludes that the licensee provided the information required by the TS and that no additional action is required at this time. The NRC staffs evaluation of the reports is attached.

Sincerely,

/RA/

David H. Jaffe, Senior Project Manager, Section 1 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-499

Enclosure:

As stated cc: See next page

December 10, 2004 Mr. James J. Sheppard President and Chief Executive Officer STP Nuclear Operating Company South Texas Project Electric Generating Station P. O. Box 289 Wadsworth, TX 77483

SUBJECT:

SOUTH TEXAS PROJECT, UNIT 2 - RE: STEAM GENERATOR TUBE INSPECTION REPORTS FOR THE SPRING 2004 OUTAGE (TAC NO. MC3648)

Dear Mr. Sheppard:

By letters dated May 4, 2004 (ML041450308), June 16, 2004 (ML041730355), and November 11, 2004 (ML043230294), STP Nuclear Operating Company, the licensee, submitted information pertaining to its steam generator tube inspections for the spring 2004 outage at South Texas Project, Unit 2, in accordance with the Technical Specifications (TS). The U.S.

Nuclear Regulatory Commission (NRC) staff also reviewed the March 5, 2003 (ML030710429),

Preservice Inspection Summary Report for Tubing in Replacement Steam Generators -

2RE09.

The NRC has completed its review of these reports and concludes that the licensee provided the information required by the TS and that no additional action is required at this time. The NRC staffs evaluation of the reports is attached.

Sincerely,

/RA/

David H. Jaffe, Senior Project Manager, Section 1 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-499

Enclosure:

As stated cc: See next page DISTRIBUTION:

PUBLIC RidsNrrLADBaxley Yamir Diaz PDIV-1 r/f RidsNrrDipmlrob (TBoyce) Louise Lund GHill (2) RidsAcrsAcnwMailCenter RidsNrrDlpmLpdiv (HBerkow) RidsOgcRp RidsNrrDlpmLpdiv1 (MWebb) RidsRgn4MailCenter (BJohnson)

RidsNrrPMDJaffe Martin Murphy ACCESSION NO: ML043440065 OFFICE PDIV-1/PM PDIV-1/LA PDIV-1/SC(A)

NAME DJaffe DBaxley MWebb DATE 12/8/04 12/8/04 12/8/04 OFFICIAL RECORD COPY

South Texas Project, Units 1 & 2 cc:

Senior Resident Inspector A. H. Gutterman, Esq.

U.S. Nuclear Regulatory Commission Morgan, Lewis & Bockius P. O. Box 910 1111 Pennsylvania Avenue, NW Bay City, TX 77414 Washington, DC 20004 C. Kirksey/C. M. Canady Mr. T. J. Jordan, Vice President City of Austin Engineering & Technical Services Electric Utility Department STP Nuclear Operating Company 721 Barton Springs Road P. O. Box 289 Austin, TX 78704 Wadsworth, TX 77483 Mr. J. J. Nesrsta S. M. Head, Manager, Licensing Mr. R. K. Temple STP Nuclear Operating Company City Public Service Board P. O. Box 289, Mail Code: N5014 P. O. Box 1771 Wadsworth, TX 77483 San Antonio, TX 78296 Environmental and Natural Resources Mr. C. A. Johnson/ R. P. Powers Policy Director AEP Texas Central Company P. O. Box 12428 P. O. Box 289 Austin, TX 78711-3189 Mail Code: N5022 Wadsworth, TX 77483 Jon C. Wood Cox Smith Matthews INPO 112 East Pecan, Suite 1800 Records Center San Antonio, TX 78205 700 Galleria Parkway Atlanta, GA 30339-3064 Director Division of Compliance & Inspection Regional Administrator, Region IV Bureau of Radiation Control U.S. Nuclear Regulatory Commission Texas Department of State Health Services 611 Ryan Plaza Drive, Suite 400 1100 West 49th Street Arlington, TX 76011 Austin, TX 78756 D. G. Tees/R. L. Balcom Brian Almon Texas Genco, LP Public Utility Commission P. O. Box 1700 William B. Travis Building Houston, TX 77251 P. O. Box 13326 1701 North Congress Avenue Judge, Matagorda County Austin, TX 78701-3326 Matagorda County Courthouse 1700 Seventh Street Bay City, TX 77414 November 2004

South Texas Project, Units 1 & 2 Susan M. Jablonski Office of Permitting, Remediation and Registration Texas Commission on Environmental Quality MC-122 P.O. Box 13087 Austin, TX 78711-3087 Mr. Terry Parks, Chief Inspector Texas Department of Licensing and Regulation Boiler Division P. O. Box 12157 Austin, TX 78711 Mr. Ted Enos 4200 South Hulen Suite 630 Ft. Worth, Texas 76109

EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO REVIEW OF THE 2004 STEAM GENERATOR TUBE INSPECTION REPORTS FACILITY OPERATING LICENSE NO. NPF-80 STP NUCLEAR OPERATING COMPANY, ET AL.

SOUTH TEXAS PROJECT, UNIT 2 DOCKET NO. 50-499

1.0 INTRODUCTION

By letters dated May 4, 2004 (ML041450308), June 16, 2004 (ML041730355), and November 11, 2004 (ML043230294), STP Nuclear Operating Company, the licensee, submitted information pertaining to its steam generator tube inspections for the spring 2004 outage at South Texas Project (STP), Unit 2, in accordance with the Technical Specifications (TS). The U.S. Nuclear Regulatory Commission (NRC) staff also reviewed the March 5, 2003 (ML030710429), Preservice Inspection Summary Report for Tubing in Replacement Steam Generators - 2RE09.

2.0 EVALUATION STP, Unit 2, replaced four reactor coolant system steam generators in October 2002. The replacement steam generators are Westinghouse Electric Company, LLC, model Delta 94 and have Alloy 690 thermally treated tubes with a nominal outer diameter of 0.688 inches and nominal wall thickness of 0.040 inches. Each steam generator contains 7,585 tubes. The steam generators utilize a full depth hydraulic tubesheet expansion method and have 405 stainless steel tube support plates with trifoil-shaped holes. The U-bends of the tubes installed in rows 1 through 17 were thermally stress relieved after bending.

The licensee provided the scope, extent, methods, and results of its steam generator tube inspections in the documents referenced above. In addition, the licensee described corrective actions (i.e., tube plugging or repair) taken in response to the inspection findings.

During the inspection, the licensee identified three dent signals that were not in the preservice inspection report. The licensee performed an inspection with a rotating pancake coil on two of the dent signals and identified no degradation. The one dent signal not inspected was in the freespan in steam generator C and had a voltage reading of less than 1 volt.

3.0 CONCLUSION

Based on a review of the information provided, the NRC staff concludes that the licensee provided the information required by its TSs. In addition, the staff concludes that there are no technical issues that warrant additional 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.

Principal Contributor: Yamir Diaz Date: December 9, 2004