ML20076F368
| ML20076F368 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 05/12/1983 |
| From: | Kammer D TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-SSINS-6820 IEB-80-06, IEB-80-6, NUDOCS 8306140041 | |
| Download: ML20076F368 (2) | |
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TENNESSEE VALLEY AUTHORITYc REGION.,i CHATTANOOGA TENNESSEE 374o1 A. GEORGI A 400 Chestnut Street Tower II May 12, 1983 83 g g A8: 46 U.S. Nuclear Regulatory Commission Region II ATTN: James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
OIE BULLETIN 80 ENGINEERED SAFETY FEATURE (ESP) RESET CONTROLS - BROWNS FERRY NUCLEAR PLANT UNITS 2 AND 3
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Enclosed is a discussion of the results of testing required by IE Bulletin 80-06 at units 2 and 3 of the Browns Ferry Nuclear Plant.
Discussion of test results on unit 1 was submitted by L. M. Mills' letter to T. A. Ippolito dated December 4,1981. This completes our response for IE Bulletin 80-06. If you have any questions regarding this matter, please call Jim Domer at FTS 858-2725.
To the best of my knowledge, I declare the statements contained herein are complete and true.
Very truly yours, TENNESSEE VALLEY AUTHORITY 0$
D. S. Kammer Nuclear Engineer Enclosure cc (Enclosure):
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Division of Reactor Operations Inspection Washington, D.C.
20555 Mr. R. J. Clark Browns Ferry Project Manager U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814 L
B306140041 830512 DRADOCK05000%
An Equal Opportunity Employer
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ENCLOSURE RESULTS OF TESTING PER IE BULLETIN 80-06 BROWNS FERRY NUCLEAR PLANT UNITS 2 AND 3 The required testing for units 2 and 3 is now complete. The testing revealed that two valves each in the high-pressure coolant injection system (HPCI), FCV-73-2, -3 and reactor core isolation cooling system (RCIC),
FCV-71-2, -3 do not remain closed on reset of HPCI or RCIC system line isolation signal.
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These valves are the only ones affected by this particular isolation signal.
Before the OIE Bulletin 80-06 testing, TVA had been considering a GE-recommended modification to ensure the valves would remain closed on reset of the autoisolation signal. This modification is intended to prevent damage to the HPCI and RCIC systems from thernal shock because of the isolation valves being opened without proper steam line draining and prewarming. The current (auto-open) configuration requires the actuation of two reset pur.hbuttons to reopen the two isolation valves. The pushbuttons are dedicated resets for these valves. Resoval of the auto-open logic will merely require the opetrator to actuate a second set of switches to open the valves. TVA does not consider this modification applicable under OIE Bulletin 80-06.
All other items tested function properly on the reset of an ESF signal.
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