ML20009B588

Interim Deficiency Rept Re Thermal Growth Clearance for Control Rod Driveline Penetrations Between Biological Shield & Primary Containment,Initially Reported 810528.Clearance for Growth Questionable.Next Rept Expected by 811023

ML20009B588
Person / Time
Site:	Fermi
Issue date:	06/26/1981
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, EF2-53564, NUDOCS 8107160343
Download: ML20009B588 (1)

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Don:Id A. W111s uaw or Aura w ,-

Ecison EE!" .

June 26, 1981 EF2-51564 Mr. James G. Keppler, Director Region III U.S. Nuclear Regulatory Cmmission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Subject:

Interim Report of 10CFR50.55(e) Item on Thermal Growth Clearance for CRD Penetrations between Biological Shield and the Primary Containment (#44).

Dear Mr. Keppler:

On May 28, 1981, Detroit Edison's Mr. G.J. Carter, OA Engineer-Construction Quality Assurance, telephoned Mr. J. Konklin of NRC Region III, to report

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on a problem with thermal growth clearance for CRD penetrations between Biological Shield and the primary containment at the Fermi 2 site.

There is questionable clearance allowing for thermal growth of the primary containnent vessel with respect to the CRD penetrations in the Biological Shield. Detroit Edison was reviewing the design with respect to the in-stalled conditions. Reactor Controls was involved with ccmpleting instal-lation of the CRD lines and had noted instances where the specified slope of the CRD lines had been exceeded. So nonconformance reports were written which required Edison Engineering disposition.

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

1 Very truly yours, DAW / HAW /cp -

cc: Mr. Victor Stello, Jr., Director Office of Inspection and Enforcement Division of Reactor Inspection Progra:rs U.S. Nuclear Regulatory Ca mission Washing +on, D.C. 20555 g* o/

S Mr. Bruce Little, Resident Inspector U.S. Nuclear Regulatory Camission j o Resident Inspectors Office 6450 North Dixie Highway Newport, Michigan 48166 g g Q 1981 8107160343 810626 PDR ADOCK 05000 S

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