ML20138P443

Final Deficiency Rept CDR 85-00-01 Re Failure of Gould Model HE3M040 Molded Case Circuit Breakers to Pass Instantaneous Overcurrent Trip Test.Breakers Successfully Tested Using Mfg Revised time-current Curve & Correct Tripping Range

ML20138P443
Person / Time
Site:	Seabrook
Issue date:	10/09/1985
From:	Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
CDR-85--1, CDR-85-00-01, IEIN-85-016, IEIN-85-16, SBN-877, NUDOCS 8511070138
Download: ML20138P443 (3)

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'. 6 SEABROOK STATION Engineering Office October 9, 1985 Pub 5c Service of New HampeNro SBN- 877 Now Hampshire Yankee Division T.F. Q2.2.2 United States Nuclear Regulatory 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) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) PSNH Letter SBN-767, dated February 21, 1985, " Interim 10CFR50.55(e) Report: Gould Molded Case Circuit Breakers,"

J. DeVincentis to R. W. Starostecki

Subject:

Final 10CFR50.55(e) Report: Gould Molded Case Circuit Breakers (CDR 85-00-01)

Dear Sir:

In Reference (b), we filed an interim 10CFR50.55(e) Report regarding a deficiency with Gould molded case circuit breakers (Model HE3M040). This deficiency involved the failure of ten circuit breakers to pass the instantaneous overcurrent trip test performed at Seabrook Station by the Start-Up and Test Department. The acceptance criteria of this test were based on the manufacturer's time-current curve. It has since been determined that the manufacturer's information on the time-current curve regarding the instantaneous tripping range was incorrect. IE Information Notice 85-16, which addresses this topic, was subsequently issued by the NRC.

The corrective actions as stated in Reference (b) have been verified complete. The circuit breaker manufacturer has issued a revised time-current curve with the correct instantaneous tripping range. Based on this information, the subject breakers were tested successfully. In addition, test documentation data for previously accepted circuit breakers (HE3M040) has been reviewed and determined to be acceptable per the manufacturer's revised time-current trip curve. We have been informed by Gould that they will review purchase orders to assure that Class 1E requirements are clearly specified and that all Class lE circuit breakers will be tested prior to shipment to the 22??oanBia%3 S

P.O. Box 300 Seabrook.NH 03874 Telephone (603)474-9521

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c-United States Nuclear Regulatory Commission Attention: Mr. Richard W. Starostecki Page 2 requirements of NEMA AB-2, and objective evidence will be issued for each

tested circuit breaker. This is our final report on this item.

Very truly yours, w A John DeVincentis, Director Engineering and Licensing cc: Atomic Safety and Licensing Board Service List 1 Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 j

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William S. Jordan, III Donald E. Chick Diane Curran Town Manager Harmon, Weiss & Jordan Town of Exeter 1 20001 S. Street, N.W. 10 Front Street Suite 430 Exeter, NH 03833 Washington, D.C. 20009 Brentwood Board of Selectmen Robert G. Perlis RED Dalton Road Office of the Executive Legal Director Brentwood, NH 03833 U.S. Nuclear Regulatory Commission Washington, DC 20555 Richard E. Sullivan, Mayor l City Hall l Robert A. Backus, Esquire Newbu rypo rt , MA 01950 116 Lowell Street P.O. Box 516 Calvin A. Canney Manc heste r, NH 03105 City Manager City Hall Philip Ahrens, Esquire 126 Daniel Street Assistant Attorney General Portsmouth, NH 03801 Augusta, ME 04333 Dana Bisbee, Esquire Mr. John 3. Tanzer Assistant Attorney General Designated Representative of Office of the Attorney General the Town of Hampton 208 State House Annex 5 Morningside Drive Concord, NH 03301 Hampton, NH 03842 Anne Verge, Chairperson Roberta C. Pevear Board of Selec tmen Designated Representative of Town Hall the Town of Hampton Falls South Hampton, NH 03827 Drinkwater Road Hampton Falls, NH 03844 Patrick J. McKeon Selectmen's Office Mrs. Sandra Gavutis 10 Central Road Designated Representative of Rye, NH 03870 the Town of Kensington RFD 1 Carole F. Kagan, Esquire East Kingston, NH 03827 Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Jo Ann Shotwell, Esquire Washington, DC 20555 Assistant Attorney General Environmental Protection Bureau Mr. Angi Machiros Department of the Attorney General Chairman of the Board of Selectmen One Ashburton Place, 19th Floor Town of Newbury Boston, MA 02108 Newbury, MA 01950 Senator Gordon J. Humphrey Town Manager's Office U.S. Senate Town Hall - Friend Street Washington, DC 20510 Amesbury, MA 01913 (ATTN: Tom Burack)

Senator Gordon J. Humphrey Diana P. Randall 1 Pillsbury Street 70 Collins Street Concord, NH 03301 Seabrook, NH 03874 (ATTN: Herb Boynton)