ML20053A352
| ML20053A352 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 05/13/1982 |
| From: | Mclendon G LOUISIANA POWER & LIGHT CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, W3K-82-0274, W3K-82-274, NUDOCS 8205260005 | |
| Download: ML20053A352 (4) | |
Text
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l_0UISI AN A j 342 OuAnoNoe Smm POWE R & LIG H T/ P O DOX SOOO
- NEW ORLEANS LOUISIANA 70174 * (504) 366 2345
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May 13, 1982 G D. McLENDON Senior Vice President W3K-82-0274 Q-3-A35.07.53 i{j'Vabap_p}\\\\flgl@
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_u Mr. John T. Collins, Regional Administrator, Region IV
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U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive Arlington, Texas 76012 1'
SUBJECT:
Waterford SES Unit No. 3
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Docket No. 50-382 Interim Report of Significant Construction Deficiency No. 53 "Possible Failure of General Electric Type HFA Relays"
Reference:
Telecon - R. Bennett (LP&L) to L. Martin (NRC) on 4/21/82
Dear Mr. Collins:
In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Interim Report of Significant Construction Deficiency No. 53, "Possible Failure of General Electric Type HFA Relays."
If you have any questions, please advise.
Very truly yours,
. d. /H ' &
GDMcL/LLB/grf Attachment cc:
- 1) Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 (with 15 copies of report) 2)
Director Office of Management g
Information and Program Control p
U. S. Nuclear Regulatory Commission Cx Washington, D. C. 20555
)
(with 1 copy of report)
GI(l 8205260005 a
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LOUISIANA "0WER & LIGHT COMPANY WATERFORD SES UNIT NO. 3 Interim Report of Significant Construction Deficiency No. 53 "POSSIBLE FAILURE OF CENERAL ELECTRIC TYPE HFA RELAYS" Reviewed by
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'Date R. J. Pfilifiser - Site Manager b
Reviewed by
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Da'te J.[.W111s-ProjectSuperintendent M.
5 -52.-8 2 Reviewed by
~.. cet Licensing Eng'1 beer
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Date rs J. Hart -
k 6~ /Z -O d Reviewed by
~ ident Engineer Date W. Yaeger - Sr. R
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~d Reviewed by
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Date J/Gutierrez - Q. A. pte Supervisor May 11, 1982 l
INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 53 "POSSIBLE FAILURE OF GENERAL ELECTRIC TYPE HFA RELAYS" INTRODUCTION This report is submitted pursuant to 10CFR50.55(e).
It describes a defect with General Electric (CE) Type HFA relays. The defect consists of cracked coil spools which could prevent proper relay operation in Class 1E switch-gear. This problem is considered reportable under the requirements of 10 CFR50.55 (e). This problem has been identified by GE to the Nuclear Regula-tory Commission under the requirements of 10CFR21.
DESCRIPTION The defect associated with the subject relays is cracked lexan coil spools.
The coil spools are fabricated of either black or clear lexan, a polycarbonate material that is susceptible to surface cracking when exposed to hydrocarbons.
Such surface cracking could ultimately deteriorate to such a degree that de-sired contact act. ions in response to energization or deenergization of the relay could be impeded.
GE Type liFA relays are installed in Class lE power distribution equipment.
In the event cracked coil insulation becomes lodged netween relay contacts, the closing circuits of 4160 volt switchgear breakers would be disabled.
SAFETY IMPLICATIONS As described above, the defective relays in 4160 volt Class lE switchgear, if lef t uncorrected, could result in failure of essential safety-related equip-ment to operate when required.
This violates the intent of GDC 17 of 10CFR50 Appendix A and therefore is considered reportable.
_ CORRECTIVE ACTION Per CE letter SA 721-PSM-152.2 dated 11/20/80, corrective action recommendations l
included replacement of defective relays with Century Series HFA relays of
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equivalent function.
(See detailed breakdown on Attachment A.)
The Century l
Series family of relays has been qualified for Class lE nuclear application per IEEE 323-1974.
It is estimated that corrective action will be completed by September 30, 1982, at which time a Final Report will be submitted to the l
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INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY No. 53 "POSSIBLE FAILURE OF GENERAL ELECTRIC TYPE HFA RELAYS" ATTACHMENT A HFA RELAYS TO BE REPLACED OR REPAIRED 6.9 KV Non Class 1E Switchgear 480 Volt Class 1E Switchgear 3Al 11 relays 3A31 12 relays 3B1 11 relays 3B31 12 relays 3AB31 8 relays 3A32 5 relays 4.16 KV Non Class 1E Switchgear 3B32 5 relays 3A2 9 relays 3B2 8 relays 480 Volt Non Class 1E Swigchgear 3A4 2 relays 3B4 2 relays 3A21 5 relays 3B21 3 relays 3A22 2 relays 4.16 KV Class 1E Switchgear 3B22 2 relays 3A3 15 relays 3B3 15 relays 480 Volt Class 1E MCC 3AB3 9 relays 3A312 1 relay 3B312 1 relay 3A313 1 relay 3B313 1 relay 3A314 1 relay 3B314 1 relay