ML20134D058
| ML20134D058 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 08/01/1985 |
| From: | Tamlyn T COMMONWEALTH EDISON CO. |
| To: | Case E Office of Nuclear Reactor Regulation |
| References | |
| TKT-85-41, NUDOCS 8508190035 | |
| Download: ML20134D058 (2) | |
Text
Eo-E4 g o - P.-
O 22710206 AvenueNorth Commonwealth Edison
- Quad Cities Nuclear Power Station Cordova, Illinois 61242 Telephone 309/654-2241 TKT-85-41 August 1, 1985
!!r. Edson G. Case, Deputy Director Office of Nuclear Reactor Regulation U. S. Nuc1 car Regulatory Commission Washington, DC 20555
Dear lir. Case:
Enclosed please find a listing of those changes, tests, and experi-ments completed during the month of July, 1985, for Quad-Cities Station Units 1 and 2, DPR-29 and DPR-30. A summary of the safety evaluation is being reported in compliance with 10 CFR 50.59.
Thirty-nine copies are provided for your use.
Respectfully, C0!!MONUEALTil EDIS0N COMPANY QU)-CITIESNUCLEA3POUERSTATION i
T. K. Ta yn Services Superintendent bb Enclosure cc J. Hojnarowski
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liodification 11-4-2-83-12 Description This modification was to replace the 2-5401A and 2-5401B valves (SJAE Suction Valves on north side of Condenser). The Crane Gate valves originally installed were designed to be on a horizontal run of pipe with the operator vertical. These valves were put on a vertical run of pipe i
with the operator horizontal, causing the valve to stick in the OPEN position repeatedly. The Pratt Butterfly valves put in their place are more compact, less prone to stick, and have no design restrictions as far as being put on a horizontal run of pipe.
i Evaluation The replacement of these valves will not affect their operation, l
except to make it less likely that they will bind.- The isolation signals remain the same. These valves were purchased Safety Related and are qualified to initiate automatic isolation.
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