ML18036A544
| ML18036A544 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 03/11/1992 |
| From: | Baron R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TVA-BFN-TS-305, NUDOCS 9203170294 | |
| Download: ML18036A544 (6) | |
Text
ACCELERATED DISTRJBUTION DEMONSTRATION SYSTEM REGUIATO INFORMATION DISTRIBUTION STEM (RIDS)
ACCESSION NBR:9203170294 DOC.DATE: 92/03/11 NOTARIZED: NO DOCKET FACIAL:50;260 Browns Ferry Nuclear Power Station, Unit 2, Tennessee 05000260
ÃJNH 'NAME AUTHOR AFFILIATION BARON,R.R.
Entergy Operations, Inc.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch, (Document Control Desk)
SUBJECT:
Withdraws 911206 application for amend to License DPR-52, consisting of TS 305 for LCO Requirements 3.7.G.l.a 6
3.7.G.3.
DISTRIBUTION CODE:
ZOOID COPIES RECEIVED:LTRj ENCL + SIZE:
TITLE: OR Submittal: General Distribution NOTES:
RECIPIENT ID CODE/NAME SANDERSiM.
ROSS,T.
INTERNAL: ACRS NRR/DET/ESGB NRR/DST SE2 NRR/DST/SICBSH7 NUDOCS-ABSTRACT OGC/HDS3 RES/DSIR/EIB EXTERNAL: NRC PDR COPIES LTTR ENCL 6
1 1
1 1
1 1
RECIPIENT ID CODE/NAME HEBDON,F NRR/DET/ECMB 7D NRR/DOEA/OTSBll NRR/DST/SELB 7E NRR/DST/SRXB SE OC/LFMB REG ILE Ol NSIC COPIES LTTR ENCL 1
1 1
1 1
1 0
1 1
NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WAS'ONTACTTHE DOCUMENT CONTROL DESK, ROOM PI-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 24 ENCL
Tennessee Valley Authority, Post Otfice Box 2000. Decatur, Alabama 35609 TVA-BFN-TS-305 10 CFR 50.90
'MARit 1992 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C.
20555 Gentlemen:
In the Matter of Tennessee Valley Authority Docket Nos.
50-260 BROWNS FERRY NUCLEAR PLANT (BFN) UNIT 2 WITHDRAWAL OF PROPOSED TECHNICAL SPECIFICATION CHANGE (TS) 305 FOR CONTAINMENT ATMOSPHERE DILUTION (CAD) SYSTEM
Reference:
Letter from TVA to NRC dated December 6, 1991, "TVA BFN Request for Technical Specification (TS) 305 for Unit 2 Limiting Condition for Operation (LCO) Requirements 3.7.G.l.a and 3.7.G.3" The purpose of this letter is to withdraw the proposed TS amendment requested in the reference.
The reference proposed amendment would temporarily remove the requirement to have two independent (CAD) systems and modify the associated action statement to require a plant shutdown in 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, if the remaining single CAD system became inoperable.
The subject TS was submitted in anticipation of having to do extensive repair or even replacement of BFN "B" CAD tank.
On October 16, 1991, BFN staff discovered that "B" CAD tank was venting nitrogen at an unusually high rate and the vacuum in the insulation space surrounding the tank had degraded.
Maintenance efforts to locate the leak indicated that the leak was not due to atmosphere entering the vacuum space from outside the tank; therefore, the leak was believed to be the internal liquid nitrogen storage tank leaking nitrogen gas into the space.
Location and repair of such a leak would require cutting into the outer shell of the tank and possibly extensive disassembly.
The repair would have required more time than the 30 days allowed by BFN TS and a forced plant shutdown would have been required.
9203170294 920311
.PDR
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2 U.S. Nuclear Regulatory Commission HI 11 )992 Following several weeks of intensive trouble shooting with vendor
- support, maintenance personnel were able to pinpoint the exact leak location.
One leak was identified and repaired, however, this did.not resolve the problem.
A second leak was subsequently identified and maintenance activities successfully repaired the "B" CAD Tank without the need to use the relief afforded by the requested amendment.
Therefore, the requested TS amendment is not required.
BFN is currently evaluating the necessity for a long-term TS change.
If you have any questions, please telephone me at (205) 729-7566.
Sincerely, R. R. Baron Manager of Site Licensing PAB 1C-BFN Enclosure cc:
See page 3
Subscribed and sworn to before me this~-~day of++~1992.
Notary Public tA Gommission Expires 1'-84 My Commission Expires -"
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~'
U.S. Nuclear Regulatory Commission r
MAR ~< 1992 Enclosure cc (Enclosure):
American Nuclear Insurers ATTN:
Librarian The Exchange, Suite 245 270 Farmington Avenue Farmington, Connecticut 06032 Mr. Johnny Black, Chairman Limestone County Commission 310 Washington Street
- Athens, Alabama 35611 Dr. C. E. Fox State Health Officer State Department of Public Health State Office Building Montgomery, Alabama 36194 Mr. J. E. Jones General Electric Company 735 Broad Street Suite 1108 James Building Chattanooga, Tennessee 37402 NRC Resident Inspector Browns Ferry 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, HW, Suite 2900 Atlanta, Georgia 30323
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