ML20127L274
| ML20127L274 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/19/1993 |
| From: | Zeringue O TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9301270072 | |
| Download: ML20127L274 (2) | |
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JAN 191993 O J W leringw we s%e ow wry rw ne U.S.
Nuclear Regulatory Commission r
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Document Control Desk Washington, D.C.
20555 Gentlemen In the Matter Of
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Docket Nos. 50-259 Tennessee Valley Authority
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50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) - 1MPLEMENTATION PLANS FOR HYDROGEN WATER CHEMISTRY CONTROL (HWCC)
References Letter from TVA to NRC dated January 31, 1992, Browns Ferry Nuclear Plant (BFN) - Implementation Plans for Hydrogen Water Chemistry Control (HWCC)
The purpose of this letter is to withdraw BFN's commitment to implement HWCC.
As part of the referenced letter, BFN committed to complete the installation of a HWCC system during Unit 2 Cycle 7 BFN has performed a review of HWCC implementation considering protection of susceptible piping and' reactor components.
BFN has decided not to install a HWCC system at the present time, due to the potential negative-plant impacts associated with HWCC implementation.
BFN plans to continue their evaluation of the HWCC option and if and when thece impacts can be eliminated, a HWCC system may be implemented.
The original commitment to install a HWCC system was to address the piping intergranular stress corrosion cracking (IGSCC) issue.
BFN has pursued an aggressive program toward mitigation at IGSCC in reactor attached piping.
The BFN program includes applying stress improvement, conducting inspections with the latest technology,-and performing.long-term repairs which include instelling resistant. materials and employing weld overlays.
These techniques have been applied consistent with NRC Generic Letter 88-01 which established NRC's position relative to IGSCC of f piping..
Application of these remedies at Browns Ferry.will insure that reactor
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attached piping will safely perform its intended function.
Utilization of these mitigation measures at other plants which have.far more operating-time than the Browns Ferry units has been shown to be successful in-mitigation of IGSCC.
Considering the mitigation techniques applied, the-regulatory concern of the IGSCC. issue has been adequately addressed without'the inctallation of the HWCC system.
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2 U.S. Nuclear Regulatory Commission JAN 1 9 1993 There are no commitments contained in thic letter.
If you have any questions, please telephone G.
D. Pierce, Interim Manager of Site Licensing, at (205) 729-7566.
Sincerely,
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Zeringue cc NRC Realdent Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35611 Mr. Thierry M.
Ross, Project Manager U.S.
Nuclear Regulatory Commission O r. 2 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 W
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