ML20062K328

Interim Rept of Significant Const Deficiency 58 Re 820712 Cable Tray Fire in Reactor Auxiliary Bldg.Damaged Cables Unacceptable for Class IE Use Will Be Replaced & Repaired as Necessary.Completion & Final Rept by 821231

ML20062K328
Person / Time
Site:	Waterford
Issue date:	08/06/1982
From:	Mclendon G LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, 58, W3K-82-0496, W3K-82-496, NUDOCS 8208170122
Download: ML20062K328 (3)

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LOUISIANA / 142 DH AHONDE STREET POWE R & L1GH T/ P O HOX 6008

• NEW OALE ANS. LOUISIANA 70174 e (504) 366 2345

r$hlD'!$$0) u August 6, 1982 G. D. McLENDON Senior Voce Presdent W3K 0496 Q-3-A35.07.58 Mr. John T. Collins, Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012

SUBJECT:

Waterford SES Unit No. 3 Docket No. 50-382 Interim Report of Significant Construction Deficiency No. 58

" Cable Tray Fire in RAB At Elevation 35'"

Dear Mr. Collins:

In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Interin Report of Significant Construction Deficiency No. 58, " Cable Tray Fire in RAB at Elevation 35' ."

If you have any questions, please advise.

Very truly yours, G.D. McLendon CDMcL/LLB/grf Attachments cc: 1) Director h c..

n, ku pki Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555

@hi))QG[mfi ' -

(with 15 copies of report)

2) Director AUG 1 f Of fice of Managernent Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with I copy of report) @

8208170122 820806 PDRADOCK05000g S

IDUISIANA POWER & LIGff 00bEANY WATEREORD STEAM ELECTRIC STATION - UNIT 10. 3 INIERIM REPORT OF SIGNIFICANT 00Nb'nu;nON DEFICIENCY 10. 58

" CABLE TRAY FIRE IN RAB AT ELEVATION 35'"

Reviewed by : / E- " [f/fL, R. J. MilM:.ser-Site Manager Dat'e Reviewed by:  ![

J/ L. Wills-P 'fect Superinterd.ent

/82 Date Reviewed by: a sy /lA/f ///l h //)?/ B -- 4-8 s J./llart-Project Lp1ing Engineer Date Reviewed by:

W.

k er-Sr'. Resident Engneer 3 8A Date

- [ 'O L Reviewed by:  % /

J. Gntierrez-Q.A. Site Supervisor / '

Date August 2, 1982 l

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INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY No. 58

" CABLE TRAY FIRE IN RAB AT ELEVATION 35'"

INTRODUCTION This report is submitted pursuant to 10CFR50.55(e). It describes a fire affecting Class IE Control Cables in the Reactor Auxiliary Building (RAB). This has not been raported'to the NRC under 10CFR21.

DESCRIPTION At approximately 10:50 a.m. on 7/12/82, a fire was discovered in cable tray C201M-SA between plan point 1936 and 1935. The fire resulted from a ignited piece of cardboard resting on the cables. The cable tray area affected by the fire was not more than two 2) feet in length and not the full width of the tray. Thirty (30) cables have been visibly damaged to varying degrees. Cables in the upper layer rsceived the most damage. Their jackets were charred and fell of in portions, exposing the insulated conductors. There were no cables where damage to conductor insulation was sufficient to expose the copper conductors. Nonconformance Report W3-4098 has been initiated to document this condition.

SAFETY IMPLICATIONS The damaged cables are part of Class IE cable system and if left uncorrected, the esfety related equipment served by these cables could be adversely affected. The daficiency is therefore reportable.

CORRECTIVE ACTION Thirteen (13) of the thirty (30) cables have been damaged to an extent deemed un-ecceptable for Class IE use; these were identified and will be replaced. The r*maining seventeen (17) exhibit partial jacket chars and may be saved if testing shows that conductor insulation has not been adversely affected by the heat of the fire; no noticeable embrittlement of either the insulation or the jacket material was detected in the affected portions of these cables.

Testing to determine the actual physical characteristics of the conductor insula-tion will be performed with samples from two affected cables: one from the

( cable showing the least damage among the 13 to be replaced, and the other from the cable exhibiting the most damage in the group of 17 cables that may be saved.

If test results prove to be satisfactory, it will serve as assurance that all the remaining cables in the group of 17 cables are serviceable. Should this be the case, appropriate jacket repairs will be made where needed.

l Corrective action will be completed by December 31, 1982, and a final report will bn submitted to the NRC at that time.

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