TXX-6286, Interim Deficiency Rept CP-86-53 Re Seismic Design of Conduits.Initially Reported on 861021.Testing Program Underway to Evaluate Ability of Adhesives or Clamps Applied to Couplings.Next Rept Expected by 870331: Difference between revisions

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=Text=
=Text=
{{#Wiki_filter:6                         Log # TXX-6286 FE 1       "
{{#Wiki_filter:6 Log # TXX-6286 FE File # 10110 1
                                                  .~
.~
File # 10110 903.10 r     C Ref # 10CFR50.55(e)     l lilELECTRIC                                           l
903.10 r
  $,I,,U$,Ya,,                                                     February 20, 1987 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555
C Ref # 10CFR50.55(e) lilELECTRIC
$,I,,U$,Ya,,
February 20, 1987 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555


==SUBJECT:==
==SUBJECT:==
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Gentlemen:
Gentlemen:
On October 21, 1986, we notified you by our letter logged TXX-6054 of a deficiency involving the seismic design of conduit, which we deemed reportable under the provisions of 10CFR50.55(e). This is an interim report submitted to status corrective action implemented to date.
On October 21, 1986, we notified you by our letter logged TXX-6054 of a deficiency involving the seismic design of conduit, which we deemed reportable under the provisions of 10CFR50.55(e). This is an interim report submitted to status corrective action implemented to date.
The testing program to evaluate the ability of adhesives or clamps applied to conduit couplings after installation to resist torsional moments is currently underway. Preliminary results indicate that previously used adhesives or clamps will not adequately resist torsional moments. However, these results have also shown that a heretofore unused combination of fiberglass cloth and resin may be suitable for the loading conditions identified. The identification of further corrective actions is dependent upon the results of the testing of this material program. The testing program is currently scheduled for completion by March 31, 1987.
The testing program to evaluate the ability of adhesives or clamps applied to conduit couplings after installation to resist torsional moments is currently underway.
Preliminary results indicate that previously used adhesives or clamps will not adequately resist torsional moments. However, these results have also shown that a heretofore unused combination of fiberglass cloth and resin may be suitable for the loading conditions identified. The identification of further corrective actions is dependent upon the results of the testing of this material program. The testing program is currently scheduled for completion by March 31, 1987.
Our next report on this issue will be submitted no later than May 1,1987.
Our next report on this issue will be submitted no later than May 1,1987.
Very truly yours, WLM' W. G. Counsil RSB:lw c - Mr. E. H. Johnson, Region IV Mr. D. L. Kelley, RI - Region IV Mr. H. S. Phillips, RI - Region IV 0702260211 870220 PDN 8    ADOCK 05000445 pyg m, s. ,m m,, s,.., i. in, i, m.s ,_ m,,                       7 47 jo}}
Very truly yours, WLM' W. G. Counsil RSB:lw c - Mr. E. H. Johnson, Region IV Mr. D. L. Kelley, RI - Region IV Mr. H. S. Phillips, RI - Region IV 0702260211 870220 PDN ADOCK 05000445 8
pyg 47 7 jo m, s.,m m,, s,..,
: i. in, i, m.s,_ m,,}}

Latest revision as of 23:08, 5 December 2024

Interim Deficiency Rept CP-86-53 Re Seismic Design of Conduits.Initially Reported on 861021.Testing Program Underway to Evaluate Ability of Adhesives or Clamps Applied to Couplings.Next Rept Expected by 870331
ML20211H574
Person / Time
Site: Comanche Peak  
Issue date: 02/20/1987
From: Counsil W
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CP-86-53, TXX-6286, NUDOCS 8702260211
Download: ML20211H574 (1)
v • d • e


Text

6 Log # TXX-6286 FE File # 10110 1

.~

903.10 r

C Ref # 10CFR50.55(e) lilELECTRIC

$,I,,U$,Ya,,

February 20, 1987 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 AND 50-446 SEISMIC DESIGN OF CONDUIT SDAR: CP-86-53 (INTERIM REPORT)

Gentlemen:

On October 21, 1986, we notified you by our letter logged TXX-6054 of a deficiency involving the seismic design of conduit, which we deemed reportable under the provisions of 10CFR50.55(e). This is an interim report submitted to status corrective action implemented to date.

The testing program to evaluate the ability of adhesives or clamps applied to conduit couplings after installation to resist torsional moments is currently underway.

Preliminary results indicate that previously used adhesives or clamps will not adequately resist torsional moments. However, these results have also shown that a heretofore unused combination of fiberglass cloth and resin may be suitable for the loading conditions identified. The identification of further corrective actions is dependent upon the results of the testing of this material program. The testing program is currently scheduled for completion by March 31, 1987.

Our next report on this issue will be submitted no later than May 1,1987.

Very truly yours, WLM' W. G. Counsil RSB:lw c - Mr. E. H. Johnson, Region IV Mr. D. L. Kelley, RI - Region IV Mr. H. S. Phillips, RI - Region IV 0702260211 870220 PDN ADOCK 05000445 8

pyg 47 7 jo m, s.,m m,, s,..,

i. in, i, m.s,_ m,,
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