ML20028D008

Final Rept Re Significant Const Deficiency 40, Ite - Gould Starter Coil Failure in Containment Cooling Fans. Original Coils Removed & Replacement Coils Installed on 821129

ML20028D008
Person / Time
Site:	Waterford
Issue date:	12/28/1982
From:	Maurin L LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, W3I82-0151, W3I82-151, NUDOCS 8301140394
Download: ML20028D008 (2)

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. ;xa LOUISIANA 142 ORARONGE STREET POWER & LIGHT P O BOX 6008

• NEW ORI.EANS. LOUISIANA 70174 * (504) 366-2345 UYfu?NsysY$

December 28, 1982 r v MAunin Vice President Nuclear Operations W3I82-0151 Q-3-A35.07.40 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 Significant Construction Deficiency No. 40 i

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"ITE - Gould Starter Coil Failure in Containmen- Ie Cooling Fans" Final Report

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REFERENCES:

LP&L letter W3182-0095 dated November 15, 198 .

Dear Mr. Collins:

In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Final Report of Significant Construction Deficiency No. 40, "ITE-Gould Starter Coil Failure in Containment Cooling Fans."

If you have any questions, please advise.

3h47 Very truly yours, L. V. Maurin LVM/ MAL:keh Attachment cc: 1) Director 3) E. Blake Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with 15 copies of report) i

2) Director 4) W. Stevenson Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with I com> nf report) 8301140394 821228 PDRADOCK05000g u s

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. FINAL REPORT OF SIGNIFICANT' CONSTRUCTION DEFICIENCY No.~40 "ITE-GOULD STARTER COIL FAILURE IN CONTAINMENT COOLING FANS"'

INTRODUCTION Jhis report is submitted pursuant to 10CFR50.55(e). 'It dsscribes problems

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with starter coils for the containment cooling fans. This problem was considered reportable under the requirements of-10CFR50.55(e).

To the best of our knowledge, this problem has not been identified to the Nuclear Regulatory Commission pursuant to 10CFR21.

DESCRIPTION .

-On July 20, 1981 Ebasco Start Up identified a problem with the starter coil for the containment cooling fans. Once energized, the starter; coils were burning up with regular frequency which could be attributed to an installation

-problem since none of the coils analyzed (as described below) were-found to be defective. The problem affected twelve (12) size 5 coils:in1 anf motor control centers 3A317-S 2M, 3A317-S 3M, 3B317-S 2M.and.3B317-S 3M.

SAFETY-IMPLICATIONS The containment cooling fan starter coil! failures have been characterized as a common mode failure. Had the coils failed, the cooling fans would be un-available for post-accident containment heat remcval, thus violating the requirements of GDC 38 of 10CFR50, Appendix A. The incident could have adversely affected the safety of the plant if left uncorrected.

CORRECTIVE ACTION Non-Conformance Report W3-2845 was initiated to track and document corrective action. The original coils were removed, and twelve replacement coils were installed. Work was completed and accepted on June 8,1982; NCR W3-2845 was closed on June 25, 1982.

In order to determine if coil failure was a generic problem, six of the replacement coils were removed and returned to ITE-Gould for analysis.

Gould Brown Boveri Co. tested the coils, and found no defects. Their conclusions show that there is no generic problem with the coils.

Corrective action to replace affected coils was completed on November 29, 1982 and no subsequent failures have been experienced. This report is submitted

.as the final report.

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