ML19262C406
| ML19262C406 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/16/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-80-01, IEB-80-1, NUDOCS 8002120191 | |
| Download: ML19262C406 (2) | |
Text
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I TENNESSEE VALLEY AUTHORITY g
<g,MC CH ATTANOOGA, TENNESSEE 37401 e
400 Chestnut Street Tower II
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k5 January 16, 1980
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Mr. James P. O'Reilly, Director
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Office of Inspection and Enforcement a
U.S. Nuclear Regulatory Coc=ission c.c.
Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303
Dear Mr. O'Reilly:
OFFICE OF INSPECTION AND ENFORCEMENT BULLETIN 80 RII:JP0 50-259, -260, -296 - BROMIS FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 In response to your Jannery 11, 1980, letter which transmitted 01E Bulletin 80-01, we are enclosing the results of our investigations at Browns Ferry Nuclear Plant. If you have any questions concerning chis subject, please call Jim Domer at FTS 854-2014.
Very truly yours, TENNESSEE VALLEY AUTHORITY e
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L. M. Mills, Manager Nuclear Regulation and Safety Enclosure 1948 230 fofo An Equal po nity Employer gfIG AL @YE
EhCLOSURE RESPCNSE TO NRC IE BULLETIN 80-01 DATED JANUARY 11, 1930 BROWNS FERRY NUCLEAR PLANT We wil'l' respond to each action it'em as listed by NRC in their bulletin.
1.
Determine if your facility has installed hard-seat check valves to isolate the ADS accumulator system from the pneu=atic supply system.
Response
The hard-seat check valves were changed out in mid-1976 to soft-seat, in-line valves on all three units at Browns Ferry.
2.
Determine if periodic leak tests have been perfor=ed on your ADS accunulator systems to assure emergency pneumatic supply for the FSAR--
required number and duration of valve operations.
Respense:
Tests are performed in accordance with a standard Browns Ferry procedure (MMI-42: ADS Relief Valve Air Supply System Testing Inspecticn and Maintenance) during refueling.
3.
Review seismic qualifications of the ADS pneumatic supply system:
(a) f rom accumulator system isolation check valve to ADS valve operator (b) from isolation valve outside containment up to ADS accumulator check valve Resconse:
(a)
The system is seismically qualified (b) The system is seismically qualified 4.
Based upon determination of items 1, 2, and 3, above, evaluate operability of the ADS for the conditions under which it is required to be operable including a seismic event.
If operability cannot be established, adhere to appropriate Technical Specification action statement.
Response
We believe that based upon the response to items 1, 2, and 3, that the operability of the ADS valve pneumatic supply is ensured even during a seismic event.h0}}