ML19344B560

Final Rept for Significant Const Deficiency 18 Re Anaconda Flexible Liquid Tight Wiring Conduit Covering Failure.Caused by Jacket Failing & Separating from Metal.Installed Conduits Will Be Covered W/Okonite T-35 Tape

ML19344B560
Person / Time
Site:	Waterford
Issue date:	10/15/1980
From:	Aswell D, Crnich J, Milhiser R LOUISIANA POWER & LIGHT CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, LPL-15274, NUDOCS 8010210458
Download: ML19344B560 (4)

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I l OUISIANA P O W E A & LiG H T! p o eax soca.swa 442 ceancsce NEW CALEANS. LCU151ANA 70174. (504) 366-2345 ES$EsS

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October 15, 1980 u, %% %

LPL 15274 Q-3-A35.07.18 Q-3-A35.02.01 Mr. K. V. Seyfrit, Director, Region IV U. S. Nuclear Regulatory Co= mission Office of Inspection & Enforcement 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012

SUBJECT:

Waterford SES Unit No. 3 Docket No. 50-382 Final Report for Significant Construction Deficiency No. 18

" Flexible Liquid Tight Wiring Conduit Covering Failure (Anaconda)"

REFERENCE:

Telecon - L. L. Bass (LP&L) to B. Hubacek (NRC) on August 1, 1980

Dear Mr. Seyfrit:

In accordance with requirements of 10CFR50.55(e), we are hereby providing two copies of the Final Report of Significant Construction Deficiency No.18,

" Flexible Liquid Tight Wiring Conduit Covering Failure (Anaconda)."

It is our understanding that Anaconda has reported this problem to the NRC under the requirements of 10CFR21.

If you have any questions, please advise.

Very truly ycurs, D. L. Aswell DLA/LLB/grf cc:

1) Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with 15 copies of report) g

. 2) Director Office of Management j

Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with I copy of report) m ono ysr y

LOUISIANA PORER & LIGHT COMPAhT WATERFORD SES !! NIT NO. -3 Revised Final Report of Significant Construction Deficiency No. 18 Flexible Liquid Tight Wiring Conduit Covering Failure (Anaconda)

Reviewed by Aw_-

/T J.

ich M ite Manager

'/ Da t'e Reviewed by fc1 R. J. Milhihar. - Project Superintendent Date Reviewed by N AQ T h fa Laa e s-Yd w 9 /3')/gri S

c-J. Hart - Project Licensing Engineer Date

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Reviewed by md O hT R. AT Hartnett - Q. A. Site Supervisor Date W

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September 29, 1980

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FINAL REPORT SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 18 FLEXIBLE LIQUID TIGHT WIRING CONDUIT COVERING FAILURE (ANACONDA)

Introduction This report is submitted pursuant to 10CFR50.55(e).

It describes a deficiency in the liquid tight covering of flexible metal conduit as manufactured by The Anaconda Company as Anaconda Metal Hose.

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Description l

Anaconda flexible liquid tight metal conduit was purchased to Specification

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LOU'1564.249B.

This specification imposed minimum bending radius for the various size conduits.

In May of 1979, Anaconda revised their technical in-I formation and increased the minimum bending radius.

Ebasco having purchased the flexible conduit prior to this date, and having a Certificate of Compliance from Anaconda to the specification, did not foresee a problem.

Fischbach & Moore Quality Control personnel discovered four flexible liquid 4

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tight metal conduits in the Water Treatment Building where the jacket was failing and separating from the metal. A deficiency report was written re-garding the situation and was identified by Report No. FM-DR-206, dated July 1, 1980.

These four conduits were identified as 31310-NB 3/4", 31343A-NA lh",

t 131344A-NB 1h", and 31351A-NB lh".

The Water Treatrant Building is not a safety-related area.

Anaconda was contacted about the conduit failure.

In the following conversa-tions and meetings, Anaconda brought out the fact that all flexible conduit should be l installed' to the new (5/11/79) bend radius, or the conduit jacket would possibly fail. At th.t time, it was pointed out to Anaconda that all 2"'and under conduit.was shipped to Ebasco in violation of'the bend radius.

On July 8,1980, Nonconformance Report F&M W3-339 (W3-2175). identified a fail-ure of,the' jacketing material for safety-related conduit 32336C-SA.

Deficiency Report FM-DR-206'(non-safety-related) was dispositioned on August 5, 1980 ~.

Nonconformance Report W3-2175 (safety-related) was evaluated and dispo-sitioned on August.8, 1980.

At the present time,'the Contractor is awaiting material.to be issued by Ebasco Services, Inc. ' Anaconda has agreed to replace all 2" and' under flexible con-duitl which was shipped prior to May of.1980 with new flexible conduit which is to be shipped in a manner.that is in compliance with Anaconda Report 3727 dated 5/11/79.

IEEE 323 prototype test reports have been reviewed by Ebasco Engineer-ing, and the acceptance of this report.is now on file.

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Safety Imolications If the plant design was such that Class lE equipment must be enclosed in a sealed liquid-tight enclosure to provide protection against harsh environment or LOCA conditions, degradation of the jacket covering on flexible conduit would provide a pathway for liquid to enter the enclosure and create a safety hazard.

However, in the case of Waterford 3, Class lE equipment components within the RCB are qualified to full LOCA Conditions.

As a result, no dependence is placed on the liquid-tight conduit to prevent entry of licuid into the component.

Thus, for Waterford 3, degradation of the Anaconda cond.uit jacket presents no safety hazard.

i Due to the design of the SIS Sump, as outlined in _WSES-3 FSAR Sections 6.2.2.2.2.1 J

and 6.2.2.3.2.1, the breaking off of the conduit jacket material-is not consid-ered a safety hazard.

Corrective Action Although the evaluation of the problem concludes the problem does not present a safety hazard, corrective action on the nonconforming condition is still re-quired and described as follows:

1)

Anaconda 2-inch and under flexible metal conduit which has not been in-stalled is being returned to Anaconda for replacement.

2)

In the Reactor Containment Building, all Anaconda flexible metal conduit presently installed will be taped with two (2) half-lapped layers of Okonite i

T-35 tape.

In certain cases, the conduit will be replaced where it is more practicable or economically advantageous.

3) Anaconda flexible conduit'in all other buildings, except the RCB, will be accepted as is.

LP&L has reserved the right to have the flexible conduit in these buildings taped, stripped or replaced.

4) Anaconda flexible conduit presently installed in the outside area vill be taped as necessary.or replaced if economically practicable.

5)

The installation drawings.are being revised to reflect the new bending radius requirements.

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