TXX-6763, Final Deficiency Rept CP-87-76 Re Field Drilled Cable Tray Holes.Initially Reported on 870826.Results of Evaluation Including Final Safety Implication & Prescribed Corrective Action Addressed in Next Rept,Submitted by 871023
| ML20235H100 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/25/1987 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-76, TXX-6763, NUDOCS 8709300373 | |
| Download: ML20235H100 (2) | |
Text
o lllllll:' 'lllllllll Log # TXX-6763 File # 10110 E
E 903.9 illELECTRIC S ptember 25, 1987 mmam c. counsa Decutive Vice President U. S. Nuclear Regulatory Commission l
Attn: Document Control Desk l
Washington, D. C. 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET N05. 50-445 AND 50-446 FIELD DRILLED CABLE TRAf H0LES SDAR:
CP-87-76 (FINAL REPORT)
Gentlemen:
On August 26, 1987, we verbally notified your Mr. H. S. Phillips of a deficiency involving field drilled cable tray holes.
We have determined that this deficiency is reportable under the provisions of 10CFR50.55(e) and the required information follows.
DESCRIPTION OF PROBLEM Acceptable cable tray / cable tray splice configurations for installation at CPSES are defined by the manufacturer via approved Vendor Drawings or by approved Design Change Authorizations (DCAs).
Unapproved splice plate installations have been observed during field walkdown activities.
Field drilled holes, used to install these plates, have resulted in some unused holes in cable trays and splice plates.
These unused field drilled holes are not considered by CPSES design, and will require extensive engineering evaluation to establish the possible effects on the design adequacy.
This issue is applicable to both Units 1 and 2.
SAFETY IMPLICATIONS Failure of cable trays to perform as intended by design could result in an inability of associated safety-related systems to perform as required for safe operation and shutdown.
We cannot, at this time, provide adequate assurance that this deficiency does not adversely impact the ability of the affected cable trays to perform their intended safety function.
CORRECTIVE ACTIONS We are currently evaluating +.his condition in conjunction with the deficiency logged SDAR CP-86-52, " Cable Tray Splices and Connections," which we deemed reportable under the provisions of 10CFR50.55(e).
The results of our evaluation including the final safety implications and prescribed corrective M.f 8709300373 070925
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TXX-6763 September la,1987 Page 2 of 2 actions will be addressed in our next report for SDAR CP-86-52, which will be submitted no later than October 23, 1987.
This is our final report for SDAR CP-87-76.
Very truly yours, M
.W. G. Counsil DAR:tgj c-Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) l i
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