ML20066J504
| ML20066J504 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 11/19/1982 |
| From: | Wells D DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, EF2-61199, NUDOCS 8211240347 | |
| Download: ML20066J504 (2) | |
Text
SD -MJ Donald A. Wells QQ Yliir$$#
Edison EM5==
November 19, 1982 EF2-61199 Mr. James G. Keppler, Regional Administrator Region III U.S. Nuclear Regulatory Ccmnission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Subject:
Final Report of 10CFR50.55 (e) Item on Cracking of Diesel Generator Fuel Oil Storage Tank Foundation (#58)
Dear Mr. Keppler:
This is Detroit Edison's final report on the cracking of the diesel generator fuel oil storage tank foundation problem. This problem was originally reported to Mr. P. Pelke of NRC Region III by Detroit Edison's Mr. II.A. Walker, Supervisor-Construction Quality Assurance, on February 22, 1982.
This item deals with the cracking of the foundation of the fuel oil storage tank for emergency diesel generator number twelve. The Detroit Edison Start-Up organization was conducting a chemical cleaning of the tank. Based on randcm tank inlet and outlet readings during the cleaning operation, the cleaning solution reached a maximum temperature of approxi-mately 140 F.
This apparently caused thermal expansion of the fuel oil storage tank, creating excessive stresses on the foundation and resulting in the cracking of the west foundation pedestal. Engineering calculations 0
indicated that 150 F would not cause excessive thermal stress.
The cracked pedestal has been repaired with Embeco 636 grout per an approved site grout repair procedure. The westerly pedestals for each of the four tanks have been modified by slotting the pedestal and installing a sliding plate. The modification has been incorporated into the design documents via Design Change Notice #7068.
If you have questions concerning this matter, please contact Mr. G.M. Trahey, Assistant Director-Project Quality Assurance.
Very truly yours, f
) &
RJ DAW /DF/cp
&y E10V 191882 8211240347 821119 PDR ADOCK 05000341 S
i I
Mr. James G. Keppler, Regional Administrator November 19, 1932 Page Two EP2-61199
/
cc: Mr. Richard DeYoung, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Ccmnission Washington, D.C. 20555 Mr. Bruce Little, Senior Resident Inspeccor U.S. Nuclear Regulatory Cm mission 6450 North Dixie Highway Newport, Michigan 48166