ML19341A886
| ML19341A886 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 01/09/1981 |
| From: | Rausch T COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 5000457, IEB-80-20, NUDOCS 8101280636 | |
| Download: ML19341A886 (3) | |
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e January lE7~1981 Mr. James G.
Keppler, Dire ctor Dire ctorate of Inspe ction and Enforcement - Region III U.S. Nu clear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Subj e ct :
Byron Station Units 1 and 2 Braidwood Station Units 1 and 2 Supplementary Response to IE Bulletin 80-20 " Failures Of Westinghouse Type W-2 Spring Return to Neutral Control Swit ches" NRC 00 cket Nos. 50-454/455, 50-456/457 References (a):
W. F.
Naughton letter to J.
G.
Keppler dated July 13, 1980 (b):
J. G.
Keppler letter to C. Reed dated July 31, 1980
( c) :
T.
J.
Raus ch letter to J. G.
Keppler dated September 15, 1980
Dear Mr. Keppler:
Referen ce ( c) provided the required response to IE Bulletin 80-20 for all Commonwealth Edison Company operating and cons t ru ction units.
In this response, thirty-nine (39) Westinghouse type W-2 swit ches per unit were identified as employed in safety-related systems at Byron and Braidwood stations.
Failures of Westinghouse type W-2 switches at Byron Station were also reported in accordance with 10 CFR 50.55(e) by Reference (a).
In our continuing review of the use of W-2 switches in safety-related applications at Byron and Braidwood Stations, we have identified additional use of these swit ches.
The numbers of additional type W-2 swit ches and their applications are provided in the enclosure to this letter.
Our initial response to the bulletin, describing our planned corre ctive a ction, is un changed.
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'k Mr. James G.- Keppler, : Dire ctor January 9, 1981 Page 2 Approximately 6 additional manhours were require'd for this portion of our review.
Please address any questions you may have in this regard to this of fice.
Very truly yours, h
ffc--- d Thomas J. Raus ch Nuclear Licensing Administrator Spe cial Proje cts j
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Dire ctor, Division of Reactor Operations Inspe ction Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 9564A V
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En closure Byron and Braidwood Stations Units 1 and 2 Supplemental Response to lE Bulletin 80-20 Additional W-2 Type Swit ches Units 1 and 2 (Switches per unit)
System Number of Swit ches Main Steam (MS) 2 Diesel Generator Room Ventilation (VD) 2 Switchgear Room Ventilation (VE) (VX) 6 Containment Purge (VQ) 2 Aux. Power (AP) 12 Diesel Generator (DG) 6 Common Auxiliary Building Ventilation (VA) 16 Control Room Ventilation (VC) 6 Chilled Water (WO) 4 Essential Service Water (SX) 18 9564A k
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