ML20097A707

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Forwards Sketches of 79 Sargent & Lundy & 23 Westinghouse Designed Pipe Whip Restraints,Per NRC 840829 Request.Info Re Open Items Concerning Crushable Energy Absorbing Matl Used Will Be Submitted by 840914.W/o Encls
ML20097A707
Person / Time
Site: Byron, Braidwood, Comanche Peak, 05000000
Issue date: 09/07/1984
From: Swartz E
COMMONWEALTH EDISON CO.
To: Harold Denton
Office of Nuclear Reactor Regulation
References
9161N, NUDOCS 8409130352
Download: ML20097A707 (1)


Text

[ N Commonwealth Edison

[ ) One First Nation 11 Praza. Chicago, lihnois

( E 7 Address Reply to: Post Othee Box 767

( / Chicago, Illinois 60690 September 7, 1984 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 Sub ject: Byron Station Units 1 and 2 Braidwood Station Units 1 and 2 Pipe Whip Restraints Utilizing Crushable Energy Absorbing Material NRC Docket Nos. 50-454/455 and 50-456/457

Dear Mr. Denton:

. . On August 29, 1984, a meeting was held in the NRC Region III offices between Region III, NRR, and Commonwealth Edison and our consultant (Sargent & Lundy) personnel to discuss the remaining NRC concerns with the use of energy absorbing material (EAM) in certain of' the pipe whip restraints utilized at our Byron and Braidwood Stations. At this meeting, the NRC staf f requested that we provide, by September 7, 1984, simplified drawings of each originally

-designed pipe whip restraint installation utilizing crushable EAM.

These sketches were to show the pipe whip restraint number, the direction of force enacted on the EAM, the tension rod orientation, the magnitude of the dynamic force (R) on the EAM, the kinetic energy absorbed (E) by the EAM, and the dimensions of the EAM.

The purpose of this letter is to formally transmit a full set of such simplified sketches for the seventy-nine Sargent'and Lundy designed pipe whip restraints, and the twenty-three Westinghouse designed pipe whip restraints utilized at our Byron and Braidwood Stations. We expect to submit information to formally

. address the remaining open items identified and discussed during the meeting by September 14, 1984.

One signed original and fifteen copies of this letter are enclosed for your use. Due to the volume of the attachment, this information package is being sent directly to Ms. Janice A.

Stevens. Additionally, this information package is being sent

~directly.to Region III.

Very truly yours E. uglas Sw Nuclear Licensing Administrator EDS/ rap cc: J. A. Stevens - LB1 J. Streeter - RIII 9161N 849gl28 0