TXX-4139, Interim Deficiency Rept SDAR-131 Re Defective Lug Crimps on Field Routed Cable.Equipment Supplied by Reliance Will Be Inspected for Proper Terminal & Connector Pin Crimping. Equipment Rework Will Be Completed by 840531
| ML20087P689 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/29/1984 |
| From: | Clements B TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| SDAR-131, TXX-4139, NUDOCS 8404090280 | |
| Download: ML20087P689 (2) | |
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TEXAS UTILITIES GENERATING COMPANY MKYWAY TOWEN
- 400 NORTH OI.IVE MTHEET. t..II. Mt
- DAI.LAN. TEXAM 73208
- mca ens osart a one ficoes March 29,1984 TXX-4139 Mr. E.H. Johnson,' Chief Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement-
. 611 Ryan Plaza Drive, Suite 1000 Docket Nos.: 50-445 o
Arlington, TX 76012 50-446 3
COMANCHE PEAK STEAM ELECTRIC STATION 9IM@M]\V/M
'Yg DEFICIENT LUG CRIMPING ~
l QA FILE: CP-84-07, SDAR-131 '
APR - 219M FILE N0.: 10110 g
Dear Mr. Johnson:
In accordance with-10CFR50.55(e), we are submitting the enclosed report of actions taken to-correct a deficiency regarding deficient lug crimping.
Supporting documentation is available at the.CPSES site for your Inspectors review.
Very truly yours, p - B.R. Clements I
BRC:mm
' cc: ~ NRC' Region IV - (0 + 1 copy)
- . Director, Inspection. & Enforcement (15 copies)
U.S. Nuclear Regulatory Commission Washington, DC 20555 a
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i STXX-.4139 ,
March 29, 1984 3,gc.
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ATTACHMENT DEFICIENT LUG CRIMPING
- : Description -
During routine 1 inspection by quality-control,- several site nonconformance Jreports:have been issued due to deficient lug crimps on field routed cable.
In the process of assessing the concern, additional lugs were. observed to
. be deficient in the termination cabinets. These terminations were provided 1by thelsupplier.f(Reliance).
Reinspection by supplier quality inspection personnel identified the follow-ing nonconforming conditions in terminal and connector pin crimps:
a): Insufficient insertion into the terminal due to inadequate 4
stripping of the conductor insulation; '
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- b)' Insufficient insertion of the conductor / terminal into the 4 crimping tool to allow full crimping; c) Excessive insulation removal on connector. pins; and, s . d)oInadequate: crimps which could be pulled loose with minimal
' force.
2 .Duelto extent of the concern in the termination cabinets, the reinspection
-" -effort was expanded.to include more Class 1E equipment provided by the sup-plier. Similar concerns were observed for the control boards and handswitches, the Unit 1-alternate shutdown panel, and assorted vertical _ panels and local HVAC' control _ panels. The Class -1E. equipment examined performs an interface cfor. control and operation' of the; plant.
Subse'quent. engineering evaluations have concluded lug crimping activities
-performed!in the field do not_ adversely impact plant safety. The scope of this conceETslimited to vendor crimping only.
- Safety Implication-
~In the event theLvendor termina11and pin crimping concerns had remained
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-undetected, the reliability of the Class 1E equipment' could not be assured .i 1 ~ '
during plant operation.-
- Corrective-Action AlllClassf1E. equipment provided by Reliance on the jobsite will be in-a -spected for proper terminal and connector' pin crimping. Deficiencies will O^i ~
ibeidocumented and reworked per; the' vendorf.s_ program for control'of non -
conforming items; Efforts'for Unit.1cand 2 equipment should be completed
" by March 30,.1984 and-May.31, 1984 respectively.
~ During. routine rele'se~ a inspections at the vendors facility, _TUGCO: QA personnel
!williprovide additionalLemphasis on the terminal and' pin crimping in termination JcabinetsLwhich 'have .not.yet been -shipped to CPSES.
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