ML20066J213
| ML20066J213 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 11/17/1982 |
| From: | Wells D DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, EF2-60511, NUDOCS 8211230471 | |
| Download: ML20066J213 (2) | |
Text
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e Donald A. Wells yga9g'gv Mssa"ce Edison EtE!=-
e-w November 17, 1982 EF2-60511 Mr. Janes G. Keppler, Regional Administrator Region III U.S. Nuclear Regulatory Ccmmission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Subject:
Interim Report of 10CFR50.55(e) Item on Loose Holding Stem Nut Keys on Remote Operated Powell Valves (#72)
Dear Mr. Keppler:
This interim report on the loose holding stem nut keys on remote cperated Powell valves problem has been prepared to provide the current status of this problem.
This item was originally reported to Mr. P. Pelke of NRC Region III by Detroit Edison's Mr. H.A. Walker, Supervisor-Construction Quality Assur-ance, on June 21, 1982.
Two failures of Powell motor operated valves were experienced at the Fermi 2 site. The failures were caused by the stem nut holding keys falling out of place causing the valve not to operate. These Powell valves are nodel 190Sl-Y-NE, with Limitorque Operator SMB-5T. The two valves are Fermi 2 valve nturbers V8-2159 and V8-2160, and are in the Residual Heat Removal (Ell-00) System.
A determination has been made by Powl1 Valve Co. that the use of retaining plates, and the usual staking of the keys, will alleviate the problen's en-countered with valves V8-2159 and V8-2160.
Another report on this item, either interim or final, is scheduled to be sent on or before March 18, 1983. If you have questions concerning this matter, please contact Mr. G.M. Trahey, Assistant Director-Project Quality Assurance.
Very truly yours, DAW /DF/cp t
1
. 8211230471 821117
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18 sat d PDR ADOCK 05000341 S
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Mr. James G. Keppler, Regional Administrator Novenber 17, 1982 Page 'Iko EF2-60511 cc: Mr. Richard DeYoung, Director Oftice of Inspection and Enforcement U.S. Nuclear Regulatory Cmmission Washington, D.C. 20555 Mr. Bruce Little, Senior Resident Inspector U.S. Nuclear Regulatory Cmmission 6450 North Dixie Highway Newport, Michigan 48166