ML20206F077

Final Deficiency Rept (CDR 86-00-04) Re Potential Malfunction in 25 Kva Inverters Mfg by Elgar Corp Due to Improper Stacking of Cable Lugs.Initially Reported on 860509.Actions Complete for Unit 1

ML20206F077
Person / Time
Site:	Seabrook
Issue date:	06/03/1986
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
(CDR-86--4), (CDR-86-00-04), SBN-1084, NUDOCS 8606240132
Download: ML20206F077 (3)

Text

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e SEABROOK STATION Engineering Of fice June 3, 1986 Public Service of New Hompshire SBN- 1084 NEW HAMPSHIRE YANKEE DIVISION T.F. Q2.2.2 United States Nuclear Rege.atory Commission Region I .

631 Park Avenue King of Prussia, PA 19406 Attention: Mr. Richard W. Starostecki, Director Division of Project and Resident Programs

References:

(a) Cot.atruction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter (SBN-1041), dated May 9, 1986,

" Interim 10CFR50.55(e) Report: Improper Cable Lug Connections in 25 kVA Inverter",

J. DeVincentis to R. W. Starostecki Subj ect : Final 10CFR50.55(e) Report: Improper Cable Lug Connections in 25 kVA Inverter (CDR 86-00-04)

Dear Sir:

In Reference (b), we reported a 10CFR50.55(e) deficiency regarding potential malfunction in the 25 kVA inverters manufactured by Elgar Corporation due to improper stacking of cable lugs. This deficiency involved the incorrect electrical connection made via nuts and studs instead of direct connection of the cable lug to the bus for ac and de input power supply. The potential effect would be abnormal heating at the connections due to high resistance. This could lead to a fault or circuit failure that would render the equipment inoperable.

The corrective action, as specified in Reference (b), determination and proper retermination of the cable lug for ac and de power supply connections in the affected 25 kVA inverters has been completed for Unit 1. As such, this is our final report.

S Seabrook Station Construction Field Office P.O. Box 700 Seabrook, NH O3874 ,J/ ,27 h

United States Nuclear Regulatory Commission Attention: Mr. Richard W. Starostecki Page 2 Corrective action for Unit 2 will be tracked via a nonconformance report.

Very truly ours, John DeVincentis l Director of Engineering cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement United States Nuclear Regulatory Commission Washington, DC 20555

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e Diens curren, Esquire Calvin A. Cennsy Harmon & Weiss City Manager 2001 S. Street, N.W. City Hall Suite 430 126 Daniel Street Washington, D.C. 20009 -

Portsmouth, NH 03801 Sherwin E. Turk. Esq. Stephen E. Merrill Esquire Office of the Executive Legal Director Attorney Ceneral U.S. Nuclear Regulatory C0mmission George Dana Bisbee, Esquire Tenth Floor Assistant Attorney General Washington, DC 20555 Office of the Attorney General 25 Capito) Street Robert A. Backus Esquire Concord, NH 03301-6397 116 Lowell Street P.O. Box 516 Kr. J. P. Nadeau Manchester, NH 03105 Selectmen's office 10 Central Road Philip Ahrens, Esquire Rye, NH 03870 Assistant Attorney General Department of The Attorney General Mr. Angle Machiros Statehouse Station #6 Chairman of the Board of Selectmen kugusta, MI 04333 Town of Newbury Newbury, MA 01950 Mrs. Sandra Cavutis Chairman, Board of Selectmen Mr. William S. Lord EFD 1 - Box 1154 Board of Selectmen Kennsington, NH 03827 Town Hall - Friend Street Amesbury, MA 01913 Carol S. Sneider Esquire Assistant Attorney General Senator Cordon J. Humphrey Department of the Attorney General 1 Pillsbury Street One Ashburton Place, 19th Floor Concord, NH 03301 Boston, MA 02108 (ATTN: Herb Boynton)

Senator Cordon J. Humphrey H. Joseph Flynn, Esquire U.S. Senate Office of General Counsel ,

Washington, DC 20510 Federal Emergency Management Agency g (ATTN: Tom Burack) -

500 C Street, SW f Washington, DC 20472 Richard A. Hampe Esq.

Hampe and McNicholas Paul McEachern Esquiru 35 Pleasant Street Matthew T. Brock, Esquire Concord, NH 03301 Shaines & NcEachern 25 Maplewood Avenue Donald E. Chick P.O. Box 360 Town Manager Portsmouth, NH 03801 Town of Exeter 10 Front Street Cary W. Holmes Esq.  !

Exeter, NH 03833 Holmes & Ells l 47 Winnacunnet Road Brentwood Board of Selectmen Hampton, NH 03841 RFD Dalton Road Brentwood, NH 03833 Mr. Ed Thomas FEMA Region I Peter J. Mathews, Mayor 442 John W. McCormack PO & Courthouse City Hall Boston, MA 02109 Newburyport, MA 01950 Stanley W. Knowles, Chairman Board of Selectmen P.O. Box 710 North Hampton, NH 03862

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