ML20080G568

Final Deficiency Rept,Item 93 Re RHR HX Calculation Error.Initially Reported on 830406.Contractor Completed Mod & Reworked Baffle Plates of HX to Achieve Required Design Flow

ML20080G568
Person / Time
Site:	Fermi
Issue date:	02/02/1984
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
93, EF2-66493, NUDOCS 8402130444
Download: ML20080G568 (3)

Text

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. g,g Donald A. Wells Manager Ouahty Assurance (313) 237 % 57 2000 Second Avenue -

31 3-February 2, 1984 EF2-66493 Mr. James G. Keppler, Regional Administrator Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Subject:

Final Report of 10CFR50.55(e) Item on Residual Heat Removal (RHR) Heat Exchanger Flow Deficiency (#93)

Dear Mr. Keppler:

This is Detroit Edison's final report involving the RHR heat exchanger flow deficiency at the Fermi 2 site. This item was originally reported to Mr. H. M. Wescott of NRC Region III by Detroit Edison's Mr. D. Ferencz, Acting Supervisor - Construction Quality Assurance on April 6, 1983.

This item deals with a calculational error which resulted in a flow deficiency. The design flow should be ten thousand (10,000) GPM, but was actually calculated to be seven thousand seven hundred (7,700)

GPM.

General Electric has performed an evaluation of the flow deficiency of the north and south heat exchangers. General Electric recalculated the flow, and concluded that to achieve the required design flow of ten thousand (10,000) GPM, the. lower baffle plates*

of the heat exchanger required modification and rework.

Under the direction of General Electric, the contractor has completed l

the' modification work cn the baffle. plates and has reinstalled all-piping for the system. Evaluation of the design flow has been completed by General Electric and is acceptable.

.This item'is considered closed and ready for NRC review.. If you have questions concerning-this matter, please contact Mr. G. M. Trahey, Assistant Director - Project Quality Assurance.

Very truly yours, t

M FEB 6 1984 8402130444 940202 PM ADOCK 05000341 '"

B ZEJf I'f

,. - , ; c, Mr. James G. Keppler, Regional Administator February 2,1984

' EF2-66493 Page 2 lec: Mr. Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 I' Mr. Paul Byron. Senior Resident Inspector U. S. Nuclear Regulatory Commission 6450 North Dixie Highway Newport, Michigan 48166 i, la L ~

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Mr. James G. Keppler, Regional Administrator February 2, 1984 EF2-66493 Page 3 bec: F. E. Agosti T. A. Alessi L. P.'Bregni

0. K. Earle W. J. Fahraer/S. H. Noetzel A. Godoshian C. M. Heidel W. R; Holland ~

Institute of Nuclear Power Operations (INPO)

W.'-H. Jens/E. P. Griffing R. S. Lenart i' P. A. Marquardt/ Docket File (2)

G. M. Trahey Approval Control NRC Follow-Up Book /NRC File Chron-File L

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