ML20040C163
| ML20040C163 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 12/18/1981 |
| From: | Clayton F ALABAMA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-SSINS-6820 IEB-80-20, NUDOCS 8201270340 | |
| Download: ML20040C163 (1) | |
Text
aAllting Addrsss alaba.na Power Company e
600 North ??" St-et Post Office Box S41 enmmgham, Ali.>ama 35291 i
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Telephone 205 783-6081 F. L Clayton. Jr.
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Alabama Power j
ijl D[C 22 A 8 tl d tre sovuon e!mirc s> stem December 18, 1981 Docket No. 50-348
,o No. 50-364 e
0 Mr. J. P. O'Reilly DWED U. S. Nuclear Regulatory Commission
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I JAN2619N Region II M
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Suite 300 101 Marietta Street, N.W.
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Atlanta, Georgia 30303 4'hTJ
Dear Mr. O'Reilly:
In our letter dated September 24, 1980 concerning I.E.Bulletin 80-20, " Failures of Westinghouse Type W-2 Spring Return to Neutral Control Switches," Alabama Power Company committed to replace the two reactor breaker trip switches located on each unit's main control board since the failure of these switches to makeup in the neutral position would prevent reset of the reactor trip breakers. Upon further study it has been determined that these particular switches use a normally closed contact in the normal spring returned position. These contacts are connected in series and are used in the under-voltage trip circuit of the reactor trip breakers.
"he under-volta 0e trip circuit is normally energized and trips the reactor trip breakers on under-voltage or opened circuit conditions.
In addition, if the under-voltage circuit is not energized, the reactor trip breakers cannot be closed. Therefore, if these switches were to fail in the manner described in the above referenced bulletin, they would be in the safe condition. As a result of this study, Alabama Power Company intends to continue use of the existing switches in this application in both Farley Nuclear Plant Units 1 and 2.
If you have any questions, please advise.
Yours very truly, F N $ (52 1
/
Clayton Jr.
FLCJr/RWS:jc 2
cc: Mr. R. A. Thomas DR j
O Oh34s yg Mr. E. A. Reeves o
Mr. W. H. Bradford PDR Office of-!&E Division of Reactor Operating Inspection Washington, D. C.
Office of I&E Division of Construction Inspection Washington, D. C.
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