ML031970011
| ML031970011 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 07/15/2003 |
| From: | Thadani M NRC/NRR/DLPM/LPD4 |
| To: | |
| Thadani M, NRR/DLPM, 415-1476 | |
| References | |
| TAC MB8435 | |
| Download: ML031970011 (9) | |
Text
July 15, 2003 Licensee:
STP Nuclear Operating Company Facility:
South Texas Project, Unit 1
SUBJECT:
SUMMARY
OF HEADQUARTERS, REGION IV, AND STP NUCLEAR OPERATING COMPANY (STPNOC) MAY 29, 2003, TELEPHONE CONVERSATION REGARDING SOUTH TEXAS PROJECT, UNIT 1, BOTTOM MOUNTED INSTRUMENTATION (BMI) LEAKAGE ISSUE
- STATUS OF ACTIVITIES (TAC NO. MB8435)
On May 29, 2003, the NRC Headquarters and Region IV staff held a telephone conference call with STPNOC, the licensee for South Texas Project, Unit 1. The conference call was a continuation of the ongoing weekly discussions following the discovery of leakage at the interface of reactor vessel bottom head and BMI penetrations 1 and 46. Enclosure 1 is a list of participants. Enclosure 2 outlines the agenda of the conversation.
The licensee indicated that it experienced a problem in thimble tube removal from penetration No. 31. It will investigate the cause.
Regarding the nondestructive examination (NDE) activities, the licensee stated that the ongoing examination did not indicate any change in the crack indication identification. The licensee has found no indications in the J-groove weld areas. The licensee has observed small apparent fabrication anomalies. The Helium bubble leak test and profilometry have been scheduled during the planned repair window.
Regarding measurement of wastage, the licensee has completed some work on demonstrating the measurement technique. The actual measurements will be done during the early part of the planned repair window.
The licensee stated that it has confirmed the five crack indications in penetrations 1 and 46.
When completed, bubble tests will give visual confirmation of the location and path of indicated leakages. These tests will also confirm whether the leaks are inside tube or outside tube initiated.
The inspection results presently indicate that there are 3 axial indications in penetration No. 1. One of the indications is the leak path. The other two crack indications are not exposed to the water. The leaking crack indication starts just above the J-groove weld and ends below the J-groove weld. Penetration No. 46 has one crack indication not exposed to water, and one starts above the J-groove and is exposed to water. The crack indications do not appear to be inside tube initiated.
Preliminary assessment shows absence of crack indications in the remaining 56 penetrations, indicating that probably, the cracks are not primary water stress-corrosion cracking induced.
The mockup will arrive at the site next Tuesday. The design activities for repairs are on schedule. Earliest date for the start of the repairs is likely to be June 11. The tubes are expected to be cut on June 14 or 15. The licensee will reflect the changes in the schedule in the next revision.
The call was then ended.
/RA/
Mohan C. Thadani, Senior Project Manager, Section 1 Project Directorate IV Division of Licensing and Project Management Office of Nuclear Reactor Regulation Docket No. 50-498
Enclosures:
as stated cc w/
Enclosures:
See next page LIST OF PARTICIPANTS Licensees Participants Dave Rencurrel Manager, Plant Operations Mark McBurnett Manager, Quality & Licensing Steve Thomas Manager, Plant Design Engineering Michael Lashley Engineering Supervisor Alex Kent Manager Testing Programs Harry Murray BMI Project Manager Wayne Harrison Sr. Staff Licensing Engineer Ed Conway Public Information NRC Participants Headquarters Region IV Bob Gramm Karen Gott Dwight Chamberlain Mark Hartzman Troy Pruett Bill Cullen Bill Johnson Mohan Thadani Jim Adams Bill Reckley Mike Runyan Steven Bloom Tom Farnholtz Herb Berkow Donnie Harrison Jack Foster Chris Gratton CONFERENCE CALL AGENDA What How Who Time (minutes) 1.
Desired Outcomes & Agenda Review McBurnett 1400 CDT (2) 2.
Overall status of unit 1 Discuss Rencurrel (2) 3.
NDE status and any new results since last week Discuss Lashley (10) 4.
Status of repair design activities Discuss Thomas (10) 5.
Schedule status Discuss McBurnett (5) 6.
Schedule for next call or other communications and feedback on call (+/ )
Discuss McBurnett (5)
May 2003 South Texas, Unit 1 cc:
Mr. Cornelius F. OKeefe Senior Resident Inspector U.S. Nuclear Regulatory Commission P. O. Box 910 Bay City, TX 77414 A. Ramirez/C. M. Canady City of Austin Electric Utility Department 721 Barton Springs Road Austin, TX 78704 Mr. L. K. Blaylock Mr. W. C. Gunst City Public Service Board P. O. Box 1771 San Antonio, TX 78296 Mr. C. A. Johnson/A. C. Bakken AEP Texas Central Company P. O. Box 289 Mail Code: N5022 Wadsworth, TX 77483 INPO Records Center 700 Galleria Parkway Atlanta, GA 30339-3064 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 D. G. Tees/R. L. Balcom Texas Genco, LP P. O. Box 1700 Houston, TX 77251 Judge, Matagorda County Matagorda County Courthouse 1700 Seventh Street Bay City, TX 77414 A. H. Gutterman, Esq.
Morgan, Lewis & Bockius 1111 Pennsylvania Avenue, NW Washington, DC 20004 Mr. T. J. Jordan, Vice President Engineering & Technical Services STP Nuclear Operating Company P. O. Box 289 Wadsworth, TX 77483 S. M. Head, Manager, Licensing Nuclear Quality & Licensing Department STP Nuclear Operating Company P. O. Box 289, Mail Code: N5014 Wadsworth, TX 77483 Environmental and Natural Resources Policy Director P. O. Box 12428 Austin, TX 78711-3189 Jon C. Wood Matthews & Branscomb 112 East Pecan, Suite 1100 San Antonio, TX 78205 Arthur C. Tate, Director Division of Compliance & Inspection Bureau of Radiation Control Texas Department of Health 1100 West 49th Street Austin, TX 78756 Brian Almon Public Utility Commission William B. Travis Building P. O. Box 13326 1701 North Congress Avenue Austin, TX 78701-3326
South Texas, Unit 1 cc:
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 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 The mockup will arrive at the site next Tuesday. The design activities for repairs are on schedule. Earliest date for the start of the repairs is likely to be June 11. The tubes are expected to be cut on June 14 or 15. The licensee will reflect the changes in the schedule in the next revision.
The call was then ended.
/RA/
Mohan C. Thadani, Senior Project Manager, Section 1 Project Directorate IV Division of Licensing and Project Management Office of Nuclear Reactor Regulation Docket No. 50-498
Enclosures:
as stated cc w/
Enclosures:
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RidsNrrPMWReckley RidsNrrPMSBloom CMoyer WCullen TMensah DHarrison CGratton MFields, EDO ACCESSION NO: ML031970011 NRC-001 OFFICE PDIV-1/PM PDIV-1/LA RIV PDIV-1/SC NAME MThadani:sab MMcAllister WJohnson via e-mail RGramm DATE 7/15/2003 7/11/2003 7/15/2003 7/15/2003 OFFICIAL RECORD COPY