ML19261E248

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Responds to IE Bulletin 79-07 Re Computer Codes Used for Seismic Analysis of safety-related Piping
ML19261E248
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 05/25/1979
From: Boyer V
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 7907050468
Download: ML19261E248 (2)


Text

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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET PHILADELPHI A. PA.19101 t2 i si e41-4 500 MAY 2 51979

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v.s.BCYER vics.passicast Mr. Boyce H. Grier, Director, Region I United States Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

SUBJECT:

NRC Region I Letter dated April 14, 1979 RE: IE Bulletin No. 79-07 Seismic Stress Analysis of Safety-Related Piping Limerick Generating Station - Units 1 and 2 Docket Nos. 50-352 and 50-353 FILE: GOVT 1-1 (IE Bulletin 79-07)

Dear Mr,

Grier:

In response to IE Bulletin 79-07, dated April 14, 1979, Philadelphia Electric Company submfts the following information relative to the computer codes used for the seismic analysis of safety-related piping at the Limerick Generating Station. Our responses are numbered to correspond to the numbering of the items in the Bulletin.

1. We are awaiting information from the vendor as to the analysis methods utilized for the Nuclear Steam Supply System (NSSS) piping.

For the Balance of Plant (BOP) piping, none of the computn jrograms used for the analysis of that piping utilized any of the methods specified in the Bulletin.

2. For the BOP piping, no analysis was performed using any of the algebraic sum =ation methods identified in item 1 of the Bulletin.

Information on the NSSS piping will be submitted when received from the vendor.

3. Computer Program ve_ification for B0P piping is as follows:
a. Programs used by Becntel Power Corporation:

(1) ME 632 (" Seismic Analysis of Piping Systems" - Bechtel Power Corporation) - verified using PISOL, PIPESD and TPIPE.

(2) ME 101 (" LEAP" " Linear Elastic Analysis of Pipe" -

Bechtel Power Corporation) - verified using ME 632, TPTPE, SUPERPIPE.

7 9 0 7 0 5 0 4 ce 2 % UM)

Mr. Boyce H. Grier, Director - (continued) Page 2

3. (continued)
a. (continued) '

s (4) NUPIPE (Nuclear Services Corporation) - verified using ADLPIPE.

(5) SAPIPE (PMB Systems Engineering Inc.) - verified using PISOL.

(6) TPIPE (PMB Systems Engineering Inc.) - verified using PISOL and ME 632.

b. Programs used by Reactor Controls (control rod drive piping system) - The analysis on the CRD piping was done using the TPIPE program of PMB Systems Engineering Inc. (see response 3.a.(6) above).
c. Programs used by Colt Industries (diesel generator c'. ping) -

Verification data pending.

d. Programs used by Atomics International Division of Rockwell International Corp. (recombiner skid piping) - Veri fication data pending.
4. Since we have not used any of the a'.gebraic su==ation methods identified in item 1 of the Bullerin for the analyn.is of BOP piping, no re-evaluation of this piping is require @.

We will forward to you the remainder of the informati n req, tired as soon as possible.

Sincerely, JFO'R/dhl7/5 2 Copy to: U. S. Nuclear Regulatory Courdssion Office of Inspection and Euforcement Division of Reactor Operations Inspection Washingtor., DC 20555