ML20080A120

Interim Deficiency Rept Re Failure of GE Type AKR-30 Circuit Breakers to Operate Properly.Initially Reported on 831223. Caused by Inadequate Mechanical Loading of Closing Spring. Investigation in Progress.Next Rept by 840321

ML20080A120
Person / Time
Site:	Hope Creek, 05000355
Issue date:	01/18/1984
From:	Martin T Public Service Enterprise Group
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8402030387
Download: ML20080A120 (2)

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Pubhc Service Electric and Gas Company Thomas J. Martin 80 Par k Plaza, Newark, NJ 07101 201-430 8316 Mailing Address: P.O. Box 570, Newark, NJ 'E 101 Vica Presidmt Engineering and Construction January 18, 1984 br. Thomas E. Murley, Administrator U.S. Nuclear Regulatory Commission Of fice of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Dr. Murley:

POTENTIAL CONSTRUCTION DEFICIENCY GE TYPE AKR-30 CIRCUIT BREAKERS HOPE CREEK GENERATING STATION On December 23, 1983, a verbal report was made to Region I, Office of Inspection and Enforcement representative, Mr. W.

Cook, advisirig of a potentially significant construction deficiency concerning the f ailure of several General Elec-tric AKR-30 circuit breakers to operate properly. The fol-lowing interim report is provided in accordance with 10CFR5 0.5 5 ( e) .

During Startup testing, five (5) AKR-30 circuit breakers ,

destined for use in non-safety related systems, failed to operate due to inadequate mechanical loading of the closing spring. Normally, this closing spring is loaded or

" charged" by a motor driven ratchet device. One suspect breaker, S/N N2922400009, was returned to General Electric's Farmington, Connecticut facility for disassembly and analy-sis. The results, however, were inconclusive for establish-ing the cause of the problem and a second circuit breaker, S/N N29224000ll, has been shipped to General Electric.

Testing and analysis of this breaker is scheduled to com-mence on January 18, 1984.

Although these five breakers were destined for use in non-safety related systems, they are identical to and inter-changeable with breakers that will be installed in safety related circuits. All AKR-30 breakers were procured under the Hope Creek OA program for safety-related materials.

8402030387 840118 p1 PDR ADOCK 05000272 i S PM l O

Dr.-Thomas E. Murley 1/18/84 An' additional interim report will be provided by March 21, 1904, if the final report is not available prior to that date.-

Very truly yours, s' ,

CC: Of fice of Inspection and Enforcement Division of Reactor Construction Inspection Washington, D.C.

NRC Resident Inspector - Hope Creek P.O. Box 241 Hancocks Bridge, New Jersey 08038 Records Center

. Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339 i

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