ML20112E350
| ML20112E350 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 01/07/1985 |
| From: | Kalivianakis N COMMONWEALTH EDISON CO. |
| To: | Case E Office of Nuclear Reactor Regulation |
| References | |
| NJK-85-04, NJK-85-4, NUDOCS 8501150107 | |
| Download: ML20112E350 (2) | |
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O 22710 206 Avenue North Commonwealth Edison Quad Cities Nuclear Power Station Cordova, Illinois 61242 Telephone 309/654-2241 NJK-85-04 January 7, 1985 Mr. Edson G. Case, Deputy Director Of fice of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washinton, DC 20555
Dear Mr. Case:
Enclosed please find a listing of those changes, tests and experiments completed during the month of December, 1984, 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, COMMONWEALTH EDISON COMPANY QUAD-CITIES NUC E POWER STATION f
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N. J. Kalivianakis Station Superintendent a
bb Enclosure cc B. Rybak
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8501150107 850107
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Modi fication M-4-1-82-51 Description L Due to the high temperatures normally encountered in the Main Steam isolation Valve room, the old type of limit switch on the Main Steam
' Isolation Valves, which had a plastic sliding part inside, would warp and~cause the switch to fall. This modification replaces all of the limit switches on the Main Steam isolation Valves. The new limit switch is a Namco EA 180 which-is more reliable than the old type of Ilmit
- switch causing less frequent maintenance. A Betts MP-100-12-9 quick electrical connect / disconnect will of fer fast component change when maintenance is required. The function of Main Steam Isolation Valve limit switches (position Indication, 10% closure SCRAM) has not been altered.
Evaluation The limi,t switches were replaced one for one without altering their original intent. The new switches will perform their function
.througho'uts the design range of the previous limit switches with greater reliability.
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