ML20091Q882
| ML20091Q882 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/29/1992 |
| From: | Zeringue O TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9202050166 | |
| Download: ML20091Q882 (3) | |
Text
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JnB 291992 U.S. Nuclear Regulatory Commission ATIN:
Document Control Desk Washington, D.C.
20555 Gentlemen In the Matter of
)
Docket Nos. 50-259 Tennessee Valley Authority
)
50-296 BROWNS TERRY NUCLEAR PLANT (BPN) - ACTIOF PLAN TO DISPOSITION CONCERNS RELATED TO UNITS 1 AND 3 CONDUIT AND CONDUIT SUPPORT - ADDITIONAL INFORMATION Referencet 1.
TVA letter to NRC dated December 12, 1991, "Small Bore Piping Program, Tubing, and Conduit Support Plans for Unit I and 3 - Additional Information" 2.
TVA letter to NRC dated May 6, 1991, " Action Plan to Disposition Concerns Related to Units 1 and 3 Conduit and Conduit Supports" The purpose of this letter is to provide information which clarifies TVA's plans for dispositioning concerns related to Units 1 and 3 Conduit and Conduit Support Program. This information was requested by NRC during a teleconference held on January 7, 1992, to clarify the evaluation of the rod hung conduit system. This 1ctter augments the referenced TVA Ictters.
TVA's interim progre.m for the seicmic qualification of the remaining Units 1 and 3 conduit and conduit eupports will consist of engineering evaluations of these commodities. These evaluations will include the Units 1 and 3 dryvells and the areas of the reactor building which vere not included in the Unit 2 program. Conduit installation (rod hung systems and non-rod hung systems) will be evaluated against the design criteria and the Unit 2 and common enveloping calculations developed during the Unit 2 program. The Unita 1 and 3 rod hung conduit installations vill be evaluated to demonstrate that the installations are bounded by the Unit 2 calculations. Discrepancies that cannot be bounded by the Unit 2 enveloping calculations will result in further evaluations and/or physical modifications, as required. The resolution of identified discrepancies will be implemented prior to the restart of Unita 1 and 3, respectively, h$k kDD K O D
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2 U.S. Nuclear Regulatory Commission JAN 20 \\992 Expeditious NRC review of this additional information and issuance of a supplemental Safety Evaluation Report are requested in order to support the design and modifications required to be completed prior to restart of Unit 3.
The enclosure summarizes the new commitment contained in this letter.
If you have any questions, please telephone k. R. 11 aron, Site 1.icensing Manager, at (205) 729-7566.
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0.5J. Zeringue Enclosure cc (Enclosure):
NRC Resident Inspector Browns Terry Nuclear Plant Route 12, Box 637 Athens, Alabama 35611 Mr. Thierry M. Ross, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. B. A. Wilson, Project Chief U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
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ENCLOSURE l
C0!911TMENT
SUMMARY
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Conduit installation for Unita 1 and 3 (rod hung systems and non-rod hung systems) vill be evaluated against the design criteria and the i
lculatione developed during the Unit 2 Unit 2 and common envelopir.
program.
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