ML19275A852

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Forwards Listing of Changes,Tests & Experiments Completed During Sept 1979
ML19275A852
Person / Time
Site: Quad Cities  Constellation icon.png
Issue date: 10/08/1979
From: Kalivianakis N
COMMONWEALTH EDISON CO.
To: Case E
Office of Nuclear Reactor Regulation
References
NJK-79-369, NUDOCS 7910190300
Download: ML19275A852 (3)


Text

Commonwealth Edison Quad Cities Nuc' ear Power Station 22710 206 Avenue North Corcova, lilinois 61242 Telegnone 309/654-2241 NJK-79-369 October 8, 1979 Mr. Edson G. Case, Deputy Di rector Office of Nuclear Reactor Regulation

. U. S. Nuclear Regulatory Commission Washington, DC 20555

Dear Mr. Case:

Enclosed please find a listing of those changes, tests, and experiments completed during the month of September, 1979 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.

Very truly yours, COMMONWEALTH EDISON COMPANY QUAD-CITIES NUCLEAR POWER STATION

,<#' /// .

/f.p. actt6( s N. J. Kalivianakis '~

Station Superintendent NJK/LFT/ san enclosure cc: R. F. Janecek i185 277 7 91019 0 I>C-)()

Modification M-4-2-78-24 Redundant 125 VDC Battery Charger DESCRIPTION OF MODIFICATION This c'dification involved installing a redundant 125 VDC battery charger on Unit 2 and converting the present Unit 1/2125 VDC charger to a Unit I redundant 125 VDC battery charger. This eliminates the need for a tie between Unit One and Unit Two 125 VDC battery chargers and increases the reliability of the system.

SUMMARY

OF SAFETY EVALUATION The margin of safety will be improved with the new system since each unit will have its own individual backup charger. And since the interconnecting cables between the units will be removed, the probability of a failure propagating from one unit to the other is greatly minimized.

1185 278

Special Test 2-28 Exxon ENC Hydraulic Test PURPOSE:

The purpose of this test was to describe a procedure for hydraulic testing of an 8 X 8 R fuel assembly by ENC at Quad-Cities Nuclear Power Station.

A new 8 X 8 fuel assenbly was inserted into a ENC hydraulic testing fixture, where various hydraulic characteristics will be determined.

SUMMARY

OF SAFETY EVALUATION:

All fuel handling was performed within the coafines of the Unit One reactor building using standard fuel handling procedures which has been approved.

Generic prccedures reviewed under this Special Test Review and found acceptable when accompanied by a Station Temporary Procedure were used by ENC personnel.

All fuel maneuvers were standard operations and were within the assumptions of the FSAR evaluations. Other activities did not create accident potential greater than the fuel Sundle drop accident considered in the FSAR. No activities during this test caused release rates greater than those assumed for the Technical Specifications.

I185 279