ML20010E200

Interim Deficiency Rept Re Transversing in-core Probe Sys Tubing,Initially Reported 801229.Tests Performed & Analysis Contained in Forthcoming Rept.Next Rept by 811223

ML20010E200
Person / Time
Site:	Fermi, 05000452, 05000453
Issue date:	08/25/1981
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, EF2-54-143, NUDOCS 8109030195
Download: ML20010E200 (2)

Text

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August 25, 1981 ,W { ' ' 'e'\

EF2-54,143 '

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Mr. James G. Feppler, Director .- 02193;u@

Region III  % g rroes U. S. Nuclear Regulatory Coanission 9; /g 799 Roosevelt Road Glen Ellyn, lb 00137 Cu /

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Subject:

Interim Report of 10CFR50.55(e) Item on Transversing In-Core Probe System (#36)

This additional interna report on the Transversing In-Core Probe System problen has been prepared to provide you with the current status of this problea.

This iten was originally reported to Mr. R. Knop of NRC-Region III by Detroit Edison's Mr. H. A. Walker, Supervisor-Construction Quality Assurance on December 29, 1980.

At that tire, Engineering investigation indicated that the transversing in-core probe instrument tubing is possibly deficient. This detennination was made by Project Design and F . ?ld Engineering while doing a design analysis of the thennal novenents associated with the prinksg containnent liner during a loss of coolant accident (LDCA) .

The Detroit Edison Engineering Research Department nocked up the existing design and perforned tests based on the thernal novement associated with o IDCA. These tests have been docunented to provide a basis for acceptance /

verification of the existing design in a forthcoming report. The analysis contained in the report should resolve this item.

Another report on this item, either interim or final, is scheduled to be I sent to you on or before Decerber 23, 1981. If you have questions concern-ing this matter, please contact Mr. H. A. Walker, Supervisor-Construction Quality Assurance.

Very truly yours,

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8109030195 810825 PDR ADOCK 05000341 S PDR AUG 2 71981

Mr. James G. Keppler, Director August 25, 1981 Page Two EP2-54143 cc: Mr. Victor Stello, Jr., Director Office of Inspection and Enforcement Division of Reactor Inspection Programs U.S. Nuclear Regulatory Cormtission Washington, D.C. 20555 Mr. Bruce Little, Resident Inspector U.S. Nuclear Regulatory Conmission Resident Inspectors Office 6450 North Dixie liighway Newport, Michigan 48166 I