ML18036B288
| ML18036B288 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 05/17/1993 |
| From: | Hebdon F Office of Nuclear Reactor Regulation |
| To: | Medford M Tennessee Valley Authority |
| References | |
| GL-88-001, TAC-M86252 NUDOCS 9305210109 | |
| Download: ML18036B288 (6) | |
Text
Docket No. 50-260 Tennessee Valley Authority ATTN:
Dr. Hark 0. Medford, Vice President Nuclear Assurance, Licensing and Fuels 3B Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801 May 17, 1993
Dear Dr. Hedford:
SUBJECT:
CORE SPRAY SYSTEM WELD OVERLAY REPAIR BROWNS FERRY NUCLEAR PLANT, UNIT 2 (TAC NO. H86252)
By letter dated April 22, 1993, the Tennessee Valley Authority (TVA) requested NRC approval of the weld overlay repair it performed for flaw indications in the Core Spray (CS) system piping weld identified as TCS-2-421.
TVA discovered these indications while performing augmented examinations, as part of the Browns Ferry Inservice Inspection Program (ISI), during the Unit 2 Cycle 6 Refueling Outage.
The General Electric Company (GE) was contracted by TVA to design and apply the subject weld overlay pursuant to ASHE Section IX code requirements.
Furthermore, it was TVA's intention to accomplish this repair in accordance with the guidelines of Generic Letter 88-01, "NRC Position On Intergranular Stress Corrosion Cracking (IGSCC)
In BWR Austenitic Stainless Steel Piping."
The NRC staff has completed a preliminary review of the full structural weld overlay applied to weld TCS-2-421 as described by letter dated April 22, 1993.
Based on this review, the staff considers TVA's repair acceptable for the upcoming Unit 2 restart.
The weld overlay repair was accomplished in accordance with the guidelines of GL 88-01 and should be sufficient to insure CS system integrity during Cycle 7 operations.
The staff's safety evaluation will be issued under separate correspondence sometime after Unit 2 restart.
Sincerely, Original signed by Frederick J.
Hebdon, Director Project Directorate II-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:
See next page OFFICE NAME PDII-4 LA MSanders PD II-4/PH TRoss:as
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Tennessee Valley Authority ATTN:
Dr. Hark 0. Hedford Browns Ferry Nuclear Plant CC:
Mr.
W.
H. Kennoy, Director Tennessee Valley Authority ET 12A 400 West Summit Hill Drive Knoxville, Tennessee 37902 Hr.
R.
H. Eytchison, Vice President Nuclear Operations Tennessee Valley Authority 3B Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801 Site Licensing Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O.
Box 2000
- Decatur,
'Alabama 35602 Mr. 0. J. Zeringue, Vice President Browns Ferry Nuclear Plant Tennessee Valley Authority P.O.
Box 2000
- Decatur, Alabama 35602 Mr. H. J. Burzynski, Manager Tennessee Valley Authority Nuclear Licensing and Regulatory Affairs 5B Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801 TVA Representative Tennessee Valley Authority 11921 Rockville Pike Suite 402 Rockville, Maryland 20852 General Counsel Tennessee Valley Authority ET llH 400 West Summit Hill Drive Knoxville, Tennessee 37902
- Chairman, Limestone County Commission P.O.
Box 188
- Athens, Alabama 35611 State Health Officer
'Alabama Dept. of Public Health 434 Monroe Street Montgomery, Alabama 36130-1701 Regional Administrator U.S.N R.C.
Region II 101 Marietta Street, N.W.
Suite 2900 Atlanta, Georgia 30323 Mr. Charles Patterson Senior Resident Inspector Browns Ferry Nuclear Plant U.S.N.R.C.
Route 12, Box 637
- Athens, Alabama 35611
- Manager, Nuclear Assurance and Licensing Browns Ferry Nuclear Plant Tennessee Valley Authority P. 0.
Box 2000
- Decatur, Alabama 35602
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Distribution Docket File NRC 8 Local PDRs BFN Reading S.
Varga G. Lainas F.
Hebdon H. Sanders T.
Ross J. Williams OGC ACRS (10)
E. Merschoff P. Fredrickson C. Patterson
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