ML19242D734

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Responds to IE Bulletin 79-02,Revision 1,re Pipe Supports Using Concrete Expansion Anchor Bolts.Only 24 Anchor Bolt Designated for Use in Seismic Piping Sys.Reanalysis of Base Plate Flexibility Being Performed
ML19242D734
Person / Time
Site: Hope Creek, 05000355  PSEG icon.png
Issue date: 07/03/1979
From: Martin T
Public Service Enterprise Group
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 7908170186
Download: ML19242D734 (2)


Text

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792 Thomas J. Martin Public Service Electric and Gas Corrmany 80 Park Place Newark, N.J. 07101 201/430-8316 Vice President Eng neering and Construction July 3, 1979 Mr. Boyce H. Grier, Director Office of Inspection and Enforce =ent U.S. Nuclear Regulatory Commission Region 1 631 Park Avenue King of Pruccia, Pennsylvania 19406

Dear Mr. Grier:

URC IE BULLETIN UO. 79-02 (REV. 1)

PIPE SUPPORT BASE P LA TE DESIGUS USING CONCRETE EXPAUSION AUCHOR BOLTS NO. 1 AUD 2 UNITS HO PE CREEK GENERATING STATION In reply to IE Bulletin No. 79-02 (Revision No. 1) datea June 21, 1979, we offer the following preliminary response:

1. Review of the Hope Creek Generating Station design indicates that concrete expansion anchor bolts have been kept to a minimum by prior planning and by the use of embedded steel plates with shear lugs and studs.
2. To date, only twenty-four (24' expansion anchor bolt designs have been designated for use in Seismic Category I piping systems, however none have been installed pending the completion of the engineering review.
3. A re-analysis of base plate flexibility 1s being perforned using a computer progra= that employs a concrete beam analogy method. This computer program was verified against the results of several finite e le me n t analyses.
4. Our AE advise s that they are reviewing their Quality Control procedures to establish the correct documentation and installation program for expans. ion type anchor bolts.

CR7-265 J

7908170156

Boyce H. Grier _2 The above actions will be c omp le te d on or about July 20, 1979, at which time we will advise you of the results.

Very truly yours,

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cc: U.S. Nuc le a r Regulatory Cocsission Office of Inspection and Enfo rcement Division of Reactor Construction Inspection Washington. D.C. 20555 59 F 2 56