ML20098E777

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Pipe Support - Base Plate Flexibility Evaluation Procedure for NRC IE Bulletin 79-02,Salem Nuclear Generating Station
ML20098E777
Person / Time
Site: Salem  PSEG icon.png
Issue date: 09/20/1984
From: Khaund A
ASSOCIATED TECHNOLOGIES, INC.
To:
Shared Package
ML20098E770 List:
References
IEB-79-02, IEB-79-2, PROC-840920, NUDOCS 8410010374
Download: ML20098E777 (8)


Text

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t ATTACHMENT 2 PIPE' SUPPORT - BASE PLATE FLEXIBILITY EVALUATION PROCEDURE .

FOR USNRC I & E BULLETIN 79-02 SALEM NUCLEAR GENERATING STATION ASSOCIATED TECHNOLOGIES, INC.

CLIFTON, NJ t

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4 ATTACHMENT 2 (cent'd)

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-PIPE' SUPPORT - BASE PLATE FLEXIBILITY EVALUATION PROCEDURE 4

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-Prepared by* .

i Ajit K. Khaund Approved by: . -t '< ' :- [' ; -

Oscar P. Wong-Y I'

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ATTACHMENT 2.(c nt'd)

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1.0 PURPOSE

- The purpose of this procedure is to provide the methqd by which pipe support base plates are evaluated for flexibility conditions and the ensuing effects'on anchor bolt loading. This evaluation is in reponse to NRC Bulletin 179-02 7

Rev. 2.

2.0 SCOPE This procedure applies to all nuclear safety re-

' lated structures, systems and components on the Salem Nuclear-Generating Station. The procedure will be augmented by specific client and project design. criteria which are.provided in the references below.

3.0 REFERENCES

3.1 PSE&G letter dated January 18, 1980, R. D.

Rippe to' Oscar Wong.

3.2 USNRC IE Bulletin No. 79-02.

3.3 USNRC IE Bulletin No. 79-02 (Supplement No. 1) 3.4 AISC Manual 3.5 ATI Engineering Standard PS-ADl-02

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- ATTACHMENT-2 (cant'd) 4.0 PROCEDURE The procedure for base plate evaluation is in ad-dition to that used for pipe support design. De-

. termination of loadings on the base plate are ob-tained from design calculations of the pipe. support (per PS-ADI-02) which in turn are designed on the basis of piping stress calculations. The additional.

consideration of this evaluation takes into account the flexibility of the base plate which may increase the normally calculated bolt pull out values. Standard procedures assume rigidity of the plate.

For the purposes of this procedure, three methods of calculation will be considered acceptable for the determination of the bolt design loads.

1 . _. Manual calculations

2. BASEPLT program used as a pre- and post-processor for STARDYNE. BASEPLT was developed by E. A.

Botty and Associates.

3. ANSYS finite element computer program developed by Swanson Associates.

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. ATTACHMENT 2 (cant'd) 4 . l' Manual determination of bolt loads will be carried out as follows:

U 4.1.1 Assume rigid plate conditions and calculate bolt tension from applied loads.

4.1.2 Determine thickness of base plate required per AISC.

4.1.3 If actual thickness.is significantly greater than required by design then the loads deter-mined in 4.1.1 are acceptable.

-4.1.4 If the actual thickness is marginal or less than that required by AISC then the rigid plate assumption is not acceptable and further review is required. Section 4.2 is applicable.

4.2 Using the BASEPLT or ANSYS program determine the bolt design load. The computer analysis takes into account the flexibility of the plate and its inter-action with the concrete and anchor bolt.

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ATTACHMENT 2 (csnt'd) 5.b DOCUMENTS Bolt' loads for-maximum shear and tension shall be transmitted to PSE&G and identified by pipe stress calculation, hanger mark and transmittal numbers.

See Attachment 1.

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- ATTACHMENT 3 O

g Burns and Roe,Inc.

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:n:xc February 6, 1984 f

Public Service Electric and Gas Company P.O. Box 236 - T3-002 08038 liancocks Br2.dge, N.J. .

Attention: Mr. R.L. Gura Manager Plant Engineering Gentlemens This is to inform you of the procedure used by Burns and Roe for performing base plate and concrete anchor bolt calculations for Salem 1 and 2, to show compliance with NRC Bulletin No. 79-02.

~he majority, in fact practically all the Salent 1 and '

2 base plates analyzed by Burns Therefore, and Roea were simplified angle,pro- and channel type connections.

cedure was developed for analyzing these connections, This procedure, using the ANSYS Finite element program. PSP-001, titled "

  • was approved by PSE4G per letter R.D. Rippe to P.W. Chan, l titled " Bolt Load Design Review", March 7,1980.

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For the few cases where the connection was other than an angle or channel shape, a more extensive ANSYS finite element analysis was performed.

' In case the corutection was made with a flat plate, an

- extensive finite element analysis wasthis Since performed programusing was de-t

- Toledynes BASEPLATS program.

- veloped specifically for base plates, it is simpler and l

cheaper to use than the ANSYS program.

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i We trust this provides the information you require.

Very truly yours,

4. l . _b.r= - -

R.T. Si::rons Project Engineer RTS:ga ec: F. Sullivan R.C. Kirk i

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