TXX-4012, Deficiency Rept Re Welded Attachments to Piping After Hydrostatic Testing.Initially Reported on 830623. Investigation Concluded Matter Not Reportable Per 10CFR50.55(e)

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Deficiency Rept Re Welded Attachments to Piping After Hydrostatic Testing.Initially Reported on 830623. Investigation Concluded Matter Not Reportable Per 10CFR50.55(e)
ML20235C032
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 07/20/1983
From: Gary R
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To: Madsen G
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML17198A319 List:
References
FOIA-87-508 TXX-4012, NUDOCS 8709240326
Download: ML20235C032 (1)
v • d • e


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July 20, 1983 TXX- 4012 Mr. G. L. Madsen, Chief Reactor Project Branch 1 U.S. Nuclear Regulatory Corrinission Office of Inspection and Enforcement 611 Ryan Plaza Drive, Suite 1000 Docket Nos.: 50-445 Arlington, TX 76012 50-446 COMANCHE PEAK STEAM ELECTRIC STATION WELDED ATTACHMENTS TO PIPING AFTER HYDR 0 STATIC TESTING QA FILE: CP-83-16; SDAR-116 FILE N0.: 10110

Dear Mr. Madsen:

On June 23, 1983 we verbally infonned your Mr. R. G. Taylor of a deficiency regarding the installation of welded attachments to piping which had previously undergone hydrostatic testing.

We have completed our investigation and concluded that the matter is not reportable under 10 CFR 50.55(e). Records supporting this determination are available for your Inspector's review at the CPSES site.

Very truly yours, RGJ:1n cc: NRC Region IV - (0 + 1 copy) I

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Director, Inspection & Enforcement (15 copies) l U.S. Nuclear Regulatory Comission Washington, DC 20555 -

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i March 29,1984 1 1

TXX-4139 l

Mr. E.H. Johnson,. Chief Reactor Project Branch 1 q U.S. Nuclear Reguletory Commission Office of Inspection and Enforcement 611 Ryan Plaza Drive, Suite 1000- Docket Nos.: 50-445-Arlington, TX 76012 ,

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COMANCHE PEAK STEAM ELECTRIC STATION DEFICIENT LUG CRIMPING i QA FILE: CP-84-07, SDAR-131 APS - 2 M '

FILE NO.: 10110

Dear Mr. Johnson:

l 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.

1 Very truly yours,

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. B.R. Clements cc: NRC Region IV - (0 + 1 copy)

Director, Inspection & Enforcement (15 copies)

U.S. Nuclear Regulatory Commission Washington, DC 20555 j

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ATTACHMENT DEFICIEflT LUG CRIMPING I

Description During routine inspection by quality control, several site nonconformance reports 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 by the supplier (Reliance).

Reinspection by supplier quality inspection personnel identified the follow-ing nonconforming conditions in terminal and connector pin crimps: j a) Insufficient insertion into the terminal due to inadequate l stripping of the conductor insulation;-

b) Insufficient insertion of the conductor / terminal into the j crimping tool to allow full crimping; c) Excessive insulation removal on connector pins; and, d) Inadequate crimps which could be pulled loose with minimal force. ,

1 Due to extent of the concern in the termination cabinets, the reinspection effort plier.

was expanded to include more Class IE equipment provided by the sup-l 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 IE equipment examined performs an interface for control and operation of the plant.

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' Subsequent engineering evaluations have concluded lug crimping activities performed in the field do not adversely impact plant safety. The scope of this concerii is limited to vendor crimping only.

Safety Implication In the event the vendor terminal and pin crimping concerns had remained <

undetected, the reliability of the Class 1E equipment could not be assured during plant operation.

Corrective Action All Class 1E equipment provided by Reliance on the jobsite will be in-spected for proper terminal and connector pin crimping. Deficiencies will be documented and reworked per the vendor's program for control of non-I conforming items. Efforts for Unit 1 and 2 equipment should be completed

) by March 30, 1984 and May 31, 1984 respectively.

During routine release inspections at the vendors facility, TUGC0 QA personnel

' will provide additional emphasis on the terminal and pin crimping in termination cabinets which have not yet been shipped to CPSES.

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