ML19270H132

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Responds to IE Bulletin 79-07 Re Seismic Stress Analysis of safety-related Piping.Lists Computer Codes Used in Analyses
ML19270H132
Person / Time
Site: 05000484
Issue date: 05/23/1979
From: Dienhart A
NORTHERN STATES POWER CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NLR3-10, NUDOCS 7906230046
Download: ML19270H132 (2)


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May 23, 1979 Mr J G Keppler, Director NLR3-10 Office of Inspection and Enforcement U S Nuclear Regulatory Connission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60127 TYRONE ENERGY PARK E-7470 Docket No. STN 50-484 Dear Mr Keppler Your letter dated April 14, 1979 forwarded IE Bulletin No. 79-07.

The Bulletin concerned seismic stress analysis of safety-related piping. The following information is provided in response to your letter. The items below are numbered to match the Bulletin action items.

1. None of the methods specified in the IE Bulletin were used for the seismic analysis of safety-related piping.
2. This item is not applicable because of the response to item #1 above.
3. All computer codes used in the seismic analysis of safety-related piping have been verified as shown below:

(a) ME 632: Verified using PISOL (EDS Nuclear Inc.),

PIPESD (URS/ John A. Blum and Associates, Engineers), and TPIPE (PMB Systems Engineering Inc.). .

(b) ME 101: Verified using ME 632, TPIPE and SU_PERPIPE (EDS Nuclear Inc.).

(c) TPIPE: Verified using PISOL (EDS Nuclear Inc.) and ME 632. -

A" (d) BSAP: Verified using ME 101.

2247 23I 79062300 $

NORTHERN STATES POWER COMPANY Page 2

, May 23, 1979 Mr J G Keppler (e) WESTDYN: Refer to WCAP 8252, Rev. 1 " Documentation of Selected Westinghouse Strucutural Analysis Computer Codes," May 1977, which is currently under NRC review.

4. This item is not applicable because of the response to item #1 above.

Yours very truly } ,

Arthur V Dienhart 4 S

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Vice President Tyrone Energy Park Project AVD/hk cc U S Nuclear Regulatory Conmission Mr Norman C Moseley Office of Inspection and Enforcenent Division of Reactor Operations Inspection Washington, D C 20555 2247 232

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