ML20090D627

Final Significant Const Deficiency Rept Re Seismic Bracing in Motor Control Ctrs.Initially Reported on 840424.Missing Support Panels Will Be Installed in Motor Control Ctrs. Completion Scheduled for 840921

ML20090D627
Person / Time
Site:	Hope Creek
Issue date:	06/29/1984
From:	Martin T Public Service Enterprise Group
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8407190107
Download: ML20090D627 (2)

Text

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= t-Thomas J. Martin Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 201/43043316 Vice President Engineering and Construction June 29, 1984 Dr. Thomas E. Murley, Administrator U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Dr. Murley:

SIGNIFICANT CONSTRUCTION DEFICIENCY SEISMIC BRACING IN MOTOR CONTROL CENTERS HOPE CREEK GENERATING STATION On April 24, 1984, a verbal report was made to Region I, Office of Inspection and Enforcement representative, Mr.

E. C. McCabe, advising of a potentially significant construction deficiency concerning missing structural support panels in three Motor Control Centers supplied by Eaton Corporation. The following final report is provided in accordance with 10CFR50.55(e).

Description of the Deficiency Our Architect / Engineer and Constructor, Bechtel, has advised us that rear structural support panels required for supple-mentary seismic bracing were not installed on Motor Control Centers (MCC's) 10B212, 10B222 and 10B242. These class lE MCC's were supplied by Cutler-Hammer Division of Eaton Corporation.

Details of the support panels were inadvertently omitted from Eaton's structural drawings. Corresponding inspection

. check points were, consequently, not included on the Eaton In-Process and Final Inspection Checklists. Eaton has determined that the condition is unique to MCC's manufactured at their Chicago facility.

8407190107 840629 yDRADOCK 050003g4 PDR lE 27

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n- s b' Dr. T. E. Murley 2 6/29/84 Safety Analysis Motor Control Centers 10B212, 10B222 and 10B242 are class lE equipment that contain safety related electrical components required for safe operation and shutdown of the plant. It has been determined that the omission of the support panels could have impact during a seismic event. A loss of structural integrity of the MCC's could prevent the safety related electrical equipment within the MCC's from functioning as intended, thereby adversely affecting safe shutdown of the plant. We, therefore, considar this condition to be reportable in accordance with 10CFR50.55(e).

Corrective Action Bechtel has issued Nonconformance Report (NCR) No. 3731 to control the discrepant hardware. In accordance with the disposition to NCR No. 3731, the missing support panels will be obtained from Eaton Corporation and installed in the Motor Control Centers. This work is scheduled for completion by September 21, 1984.

Very truly yours, f

d C Office of Inspection and Enforcement Division of Reactor Construction Inspection Washington, D. C. 20555 NRC Resident Inspector - Hope Creek P. O. Box 241 Hancocks Bridge, NJ 08038  ;

Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339

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