ML20062B430
| ML20062B430 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 09/18/1978 |
| From: | Eric Turner HOUSTON LIGHTING & POWER CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| NUDOCS 7810300088 | |
| Download: ML20062B430 (2) | |
Text
...
4 Houston
[ f;;, 1 Ughting
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a
& Power i
Company Electric Tower L
RQ Box 1700 II.d i
Houston. Texas 7700I t
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September 18, 1978 ST-HL-AE-290 l
Director, Region IV Office of Inspection and Enforcement Nuclear Regulatory Commission 611 Ryan Piar,a Drive 9
.i (3
Arlington, Texas 76012 l
s
Dear Sir:
[
cq South Texas Project
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Units 1 & 2 Docket Nos. STN 50-498. STN 50-499
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Supplement to the Written Report on the Reportable Deficiency Concerning Unconsolidated Concrete in the Fuel Handling Building for Unit 1 of the South Texas Proiect On April 14, 1978, pursuant to 10 CFR 50.55(e)(3),
Houston Lighting S Power Company submitted to your office a written eport concerning unconsolidated concrete in a
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slab of th-Unit 1 Fuel Handling Building.
Page five -(5) of that report discussed potential. methods of repairing the slab, but did not specify which method (s) would be used.
The following discussion provides a description of the repair methods being employed and the status of the repair of the slab.
t These methods included epoxy sealing of the surface followed by epoxy injection and a combination of dry-packing, shotcreting, and epoxy injection.
A large portion i
of the repair work involved dry packing grout in the larger accessible chipped out areas and at the same time installing injection ports near possible void areas.
These areas were later brought to grade using the shoterete 2
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- " #Heaston lig)iting & Ibwer Company Director, Region IV Page Two September 18, 1978 l
method.
Epoxy was then injected when the dry pack and
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shotcrete had attained sufficient strength.
In areas j
where surface honeycombing existed, the surface was j
sealed with epoxy and when adequate set had taken 1
place, more epoxy was injected through ports strate-1 gically located in the ceiling.
Epoxy was also in-j jected through holes drilled in embedded plates.
t The structural repairs of the slab were completed August 30.
Evaluation of core samples taken from the slab indicate that an acceptable level of safety has been restored.
No further. action is planned concerning
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repair of the slab.
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Very truly yours,
/-
, 6(,
t-t-
E. A. Turner Vice President Power Plant Construction i
and Technical Services SSR/bk1 cc:
Boyce H. Grier (Office of Inspection and Enforcement)
C. Thrash (Baker S Botts)
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R. Gordon Gooch (Baker & Botts)
J.
R. Newman (Lowenstein, Newman, Reis, and Axelrad)
H. L. Key i
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