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) | |
Text
.
4
- r..
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 Arlington, TX 76012 50-446 o
9IM@M]\\V/M 3 COMANCHE PEAK STEAM ELECTRIC STATION DEFICIENT LUG CRIMPING
~
'Yg l
APR - 219M QA FILE: CP-84-07, SDAR-131 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 BRC:mm I
' cc: ~ NRC' Region IV - (0 + 1 copy)
. Director, Inspection. & Enforcement (15 copies)
U.S. Nuclear Regulatory Commission Washington, DC 20555 a
r.
8404090280 840329 o.PDR ADOCK 05000445 S
PDR.
f~L-97ii
. ~
e
N March 29, 1984 i STXX-.4139 3,gc.
s x
b' 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 stripping of the conductor insulation; 4
- b)' Insufficient insertion of the conductor / terminal into the
^
4 crimping tool to allow full crimping; c) Excessive insulation removal on connector. pins; and,
. d)oInadequate: crimps which could be pulled loose with minimal s
' force.
.Duelto extent of the concern in the termination cabinets, the reinspection 2
-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
~
1
-undetected, the reliability of the Class 1E equipment' could not be assured
.i during plant operation.-
~ '
- Corrective-Action AlllClassf1E. equipment provided by Reliance on the jobsite will be in-
-spected for proper terminal and connector' pin crimping. Deficiencies will a
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~ inspections at the vendors facility, _TUGCO: QA personnel a
!williprovide additionalLemphasis on the terminal and' pin crimping in termination JcabinetsLwhich 'have.not.yet been -shipped to CPSES.
^
x_
x c:
'q~'
~
,