ML20093A001

Final Deficiency Rept 84-07 Re Concrete Expansion Anchor Installation.Initially Reported on 840511.Deficiencies Will Be Reworked,Per Sargent & Lundy Requirements & Contractors Will Contact Company for Installation Instructions

ML20093A001
Person / Time
Site:	Braidwood
Issue date:	06/11/1984
From:	Swartz E COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
84-07, 84-7, 8720N, NUDOCS 8407100002
Download: ML20093A001 (2)

Text

,.

. Commonwe::lth Edison

[ ) one First Nationit Plaza. Chicigo, Illinois

( } Address Reply to: Post Office Box 767 N Chicago, Illinois 60690 June 11, 1984 Mr. James G. Keppler

, Regional Administrator U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Il 60137

Subject:

Braidwood Station Units 1 and 2 10 CFR 50.55(e) 30 Day Report Concrete Expansion Anchor Installation NRC Docket Nos. 50-456/457

Dear Mr. Keppler:

On May ll, 1984 the Commonwealth Edison Company notified Mr.

W. L. Forney of your office of a deficiency reportable pursuant to 10 CFR 50.55(e), regarding Concrete Expansion Anchors installed through finished floors. For your tracking purposes, this deficiency was assigned Number 84-07.

This letter fulfills the thirty day reporting requirements of 10 CFR 50.55(e) regarding this matter, and is considered to be a final report.

DESCRIPTION OF DEFICIENCY Contrary to Sargent and Lundy Specification BY-BR-CEA, Section 3.1.5, the embeddment length of Concrete Expansion Anchors (CEAs) installed in finished slabs was measured from the elevation ofThis the finished floor rather than from that of the rough concrete.

apparent oversight could result in CEA installations with anchor embeddment lengths which are less than the required minimum.

ANALYSIS OF SAFETY IMPLICATIONS If left undetected, equipment could potentially shift during the unlikely occurence of a seismic event, resulting in the subsequent loss of the equipments' intended function.

CORRECTIVE ACTION TAKEN For previous installations, Sargent & Lundy completed a walk down of the finished floor areas in order to map the size, location, and determine the acceptability of previous CEA installations.

Any deficiencies (i.e. longer length CEAs required) identified will be reworked in accordance with Sargent and Lundy requirements.

8407100002 840611 S

PDR ADOCK 05000456 pyg JUN 1 2 1934 F27 e 6

r.

For new installations in finished floors, all contractors installing CEAs have been instructed to notify Sargent & Lundy and obtain the correct embeddment length prior to installation. This contractor notification will be required until design documents are revised to reflect the appropriate length of CEAs to be used.

Commonwealth Edison Company NCR 617 was issued to document and track this deficiency until required corrective actions are complete.

l Please address any questions that you or your staff may have concerning this matter to this office.

Very truly yours, E. Douglas Swartz Nuclear Licensing Administrator EDS/ rap cc: RIII Inspector - Braidwood Director of Inspection.and Enforcement ,

U.S. Nuclear Regulatory Commission -

Washington, D.C. 20555 o

8720N