TXX-6414, Interim Deficiency Rept Re Seismic Design of Conduit. Initially Reported on 861021.Corrective Action Dependent on Results of Fiberglass Cloth/Resin Matl Testing for Loading Conditions.Next Rept Will Be Submitted by 870921
| ML20210A922 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 04/30/1987 |
| From: | Counsil W, Keeley G TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-86-53, TXX-6414, NUDOCS 8705050191 | |
| Download: ML20210A922 (1) | |
Text
_ _ _ _ _ _ _ _ -
, Log # TXX-6414 P --- File # 10110
=. .- 903.10
= = Ref: 10CFR50.55(e) 1UELECTRIC Wlhans C. ( ourmi l.or, urns S on e l>ru, lent U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555
SUBJECT:
COMANCilE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 SEISMIC DESIGN OF CONDUlT SDAR: CP-86-53 (INTERIM REPORT)
Gentlemen:
On October 21, 1986, we notified you by cur 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 dt.te.
The testing program to evaluate the ability of adhesives or clamps ap) lied to conduit couplings after installation to resist torsional moments has seen completed. The results indicate that the adhesives or clam will not resist those torsional moments, llowever, additional testing has Lagun on a heretofore unused combination of fiberglass cloth and resin which appears to be suitable for the loading conditions identified based upon preliminary testing. Formal testing of the fiberglass cloth / resin material is currently scheduled for completion by June 30, 1987. The identification of further corrective actions, including the issue of revised design documents, is dependent upon the results of this testing.
We will submit our next report on this issue no later than September 21, 1987.
Very truly yours, bY U1MIb W. G. Counsil
/ .f By: ~G.S. Keeley Manager, Nucle 6 9 sfng RSB/mlh c - Mr. E. II. Johnson, Region IV Mr. D. L. Kelley, RI - Region IV Mr. II. S. Phillips, RI Region IV f
SON $500$$4g PDR
.. .th t Hnc Street i 11 'll I tallis, le tes M.'01