ML032100321

Summary of Meeting with South Texas Project Nuclear Operating Company, South Texas Project, Unit 1, Bottom Mounted Instrumentation (Bmi) Penetration Leakage Issue

ML032100321
Person / Time
Site:	South Texas
Issue date:	08/08/2003
From:	Thadani M NRC/NRR/DLPM/LPD4
To:
Thadani M, NRR/DLPM, 415-1476
References
TAC MB8435
Download: ML032100321 (7)

Text

August 8, 2003 LICENSEE: STP Nuclear Operating Company FACILITY: South Texas Project, Unit 1

SUMMARY

OF HEADQUARTERS, REGION IV, AND SOUTH TEXAS PROJECT NUCLEAR OPERATING COMPANY TELEPHONE CONFERENCE OF JULY 10, 2003, REGARDING SOUTH TEXAS PROJECT, UNIT 1, BOTTOM-MOUNTED INSTRUMENTATION LEAKAGE ISSUE; STATUS OF ACTIVITIES (TAC NO. MB8435)

On July 10, 2003, the U. S. Nuclear Regulatory Commission (NRC) Headquarters and Region IV staff held a telephone conference with STP Nuclear Operating Company (STPNOC), the licensee for South Texas Project (STP), Units 1 & 2. The conference call was a continuation of the ongoing discussions and was a follow up of the licensees activities following the discovery at Unit 1 of an apparent leakage at the interface of the reactor vessel bottom head mounted instrumentation (BMI) penetrations nos. 1 and 46. is a list of participants. Enclosure 2 is the agenda for the telephone conference.

At this phone call the licensee went through a list of ongoing activities, outlining the status as follows:

 The licensee will capture boat samples, including the weld area where a helium bubbles release was sighted.

 The licensee is set to start taking the boat samples on July 11th and will ship the samples to Framatome promptly.

 The licensee will provide NRC with schedules for the sample processing.

 The licensee plans to release a letter tomorrow which provides information regarding actions taken and commitments made. The letter is undergoing final internal licensee reviews.

 Regarding the finite element analyses of fatigue factors, the summary of the fatigue calculations does not include a safety factor of 4. The safety factor of 2 will be used for the cumulative usage factor calculation.

 All of the guide tubes have been cleaned and fittings were replaced at the seal table.

 The root cause analyses are progressing.

 Primary Water Stress Corrosion Cracking does not appear to be the root cause for the crack indications. Fabrication is the more likely cause. The licensee will continue to study both options until satisfied with the conclusion.

 As part of its post-repair monitoring program, the licensee will commit to do penetration ultrasonic testing (UT) inspections again at the end of the Unit 1 current inservice inspection interval, sometime in 2008 or 2009.

 Unit 2 visual examination has shown no problems. The licensee will complete the Unit 2 penetration UT examination in 2005.

 The wastage will be monitored on the repair nozzles. The licensee is discussing with the NRC its post-repair monitoring decisions.

The phone call ended with a reminder that the July 17, 2003, call will not be held due to the third NRC/STPNOC meeting on that same day.

/RA/

Mohan C. Thadani, Sr. Project Manager, Section 1 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-498

Enclosures:

1. List of Participants

2. Telephone Conference Agenda cc: see next page

LIST OF PARTICIPANTS STPNOC/NRC TELEPHONE CONFERENCE JULY 10, 2003 Licensees Participants Dave Rencurrel Manager, Plant Operations Chet McIntyre BMI Engineering Tripp Frahm BMI Project Manager Ed Conway Public Information Wayne Harrison Licensing NRC Participants Headquarters Region IV Mohan Thadani Bill Johnson Carol Moyer Tom Farnholtz Mark Hartzman Russ Bywater Stephanie Coffin Mike Runyan Jack Foster Bob Gramm Chris Gratton Enclosure 1

STPNOC/NRC TELEPHONE CONFERENCE AGENDA JULY 10, 2003

1. Desired Outcomes & Agenda Review Harrison 1400 CDT (2)

2. Overall status of Unit 1 Discuss Rencurrel (2)

3. Status of repair activities Discuss Frahm (5)

4. Root cause and inspection and monitoring Discuss McIntyre (10) plan

5. Boat sample activities Discuss McIntyre (5)

6. Status of Engineering and Licensing Discuss Harrison (10)

Actions

7. Schedule for next call or other Discuss Harrison (5) communications and feedback on call (+/)

Enclosure 2

ML032100321 *via e-mail NRC-001 OFFICE PDIV-1/PM PDIV-1/LA RIV PDIV-1/SC NAME MThadani:sab MMcAllister WJohnson* RGramm DATE 8/08/2003 8/08/2003 8/08/2003 8/08/2003 South Texas Project, Unit 1 cc:

Mr. Cornelius F. OKeefe A. H. Gutterman, Esq.

Senior Resident Inspector Morgan, Lewis & Bockius U.S. Nuclear Regulatory Commission 1111 Pennsylvania Avenue, NW P. O. Box 910 Washington, DC 20004 Bay City, TX 77414 Mr. T. J. Jordan, Vice President A. Ramirez/C. M. Canady Engineering & Technical Services City of Austin STP Nuclear Operating Company Electric Utility Department P. O. Box 289 721 Barton Springs Road Wadsworth, TX 77483 Austin, TX 78704 S. M. Head, Manager, Licensing Mr. L. K. Blaylock Nuclear Quality & Licensing Department Mr. W. C. Gunst 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/A. C. Bakken 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 Matthews & Branscomb INPO 112 East Pecan, Suite 1100 Records Center San Antonio, TX 78205 700 Galleria Parkway Atlanta, GA 30339-3064 Arthur C. Tate, Director Division of Compliance & Inspection Regional Administrator, Region IV Bureau of Radiation Control U. S. Nuclear Regulatory Commission Texas Department of Health 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 May 2003

South Texas Project, 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