TXX-6343, Interim Deficiency Rept CP-86-51 Re Overstated Tensile Strengths of Hilti Kwik Bolts.Initially Reported on 860717. Hilti Isolated Problem to Specific Bolt Size.Info Notice 86-094 Cited Correction.Next Rept Due by 870424
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| ML20204H605 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/20/1987 |
| From: | Counsil W, Keeley G TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CP-86-51, IEIN-86-094, IEIN-86-94, TXX-6343, NUDOCS 8703270051 | |
| Download: ML20204H605 (1) | |
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|---|---|
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Text
. _ _ _
_ Log # TXX-6343
== File # 10110 903.9 F9 1 .-- Ref # 10CFR50.55(e)
= x 1lIELECTRIC y,,
March 20, 1987 h.YN[$feYrRegulatoryCommission Attn: Document Control Desk Washington, D.C. 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 t ANCHOR BOLTS SUPPLIED BY HILTI SDAR: CP-86-51 (INTERIM REPORT)
Gentlemen:
On July 17, 1986, we verbally notified your Mr. I. Barnes of a deficiency involving a condition cited at another nuclear facility in which anchor bolts supplied by Hilti do not meet average ultimate tensile loads in certain sizes as published by the supplier. Our latest interim report, logged TXX-6238, was submitted on January 27, 1987.
Evaluation of the problem by the vendor (Hilti) resulted in the concern being limited to 1/2 inch diameter Hilti Kwik Bolts with design embedments of 3-1/2 inches and larger. This evaluation resulted in the issuance of NRC Information Notice 86-94, "Hilti Concrete Expansion Anchor Bolts," reporting a reduction in ultimate tensile capacity values for the 1/2 inch diameter Hilti Kwik Bolts.
Our evaluation of this concern is continuing; we expect to submit a follow-up report by April 24, 1987.
Very truly yours,
[
W. G. Counsil By:
G.~ S. Keeley, &
/
[
/s Manager,NuclearLicpsing GLB/dl c - Mr. E. H. Johnson - Region IV Mr. D. L. Kelley, RI - Region IV Mr. H. S. Phillips, RI - Region IV m "Mu EEh" S
g ll0 ex) Nonh Olne Street I..ll 81 Dallas lesas 75201