ML20058J023
| ML20058J023 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 07/22/1982 |
| From: | Wells D DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, EF2-59379, NUDOCS 8208090140 | |
| Download: ML20058J023 (2) | |
Text
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Donald A. Wells f
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2000 Seewd Avenue (31 3
July 22, 1982 EF2-59379 Mr. James G. Keppler, Regional Administrator Region III U.S. Nuclear Regulatory Cmmission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Subject:
Interim Report of 10CFR50.55(e) Item on Cracking of Diesel Generator Fuel Oil Storage Tank Foundation (#58)
Dear Mr. Keppler:
This additional interim report on the cracking of the diesel generator fuel oil storage tank foundation problem has been prepared to provide you with the current status of this problem.
The problem was originally reported to Mr. P. Pelke of NRC Region III by Detroit Edison's Mr. H.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.
During the cleaning operation, the cleaning solution reached temperatures of approximately 1400 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. Edison Engineer-
~
ing had specified that the maximum temperature should not exceed 1500 F..
The cracked pedestal is being repaired with Bnbeco 636' grout per an approved site grout repair procedure. The steel saddle support at the cracked pedestal will be raised 1/8 inch to prevent any large bearing stresses in the pedestal during modifications. This is the only steel-saddle requiring temporary lifting.
The modifications will involve slotting the pedestal and installing a grout pad and sliding plate. This modi _fication will be applied to the four westerly pedestals located on the west side of the RHR Building to correct the design deficiency. The modification will be incorporated into the design documents via a Design Change Notice. The two tanks located on the north side of the building may be flushed before empletion of this modification.
8208090140 820722 PDR ADOCK 05000341 Agg. 21982 S
PDR q
77
Mr. James G. Keppler, Regional Administrator July 22, 1982 s
Page Two EF2-59379 Another report on this item, either interim or final, is scheduled to be sent to you on or before November 19, 1982. If you have questions concerning this matter, please contact Mr. George M. Trahey, Assistant Director-Project Quality Assurance.
Very truly yours I
/ )
s DAW /DF/cp cc: Mr. Richard DeYoung, Director Office of Inspection and Enforcement Division of Reactor Inspection Programs U.S. Nuclear Regulatory Cm mission Washington, D.C. 20555 Mr. Bruce Little, Resident Inspector U.S. Nuclear Regulatory Cmmission 6450 North Dixie Highway Newport, Michigan 48166 I
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