ML19344A748
| ML19344A748 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 08/11/1980 |
| From: | Woolever E DUQUESNE LIGHT CO. |
| To: | Varga S Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19344A749 | List: |
| References | |
| NUDOCS 8008220129 | |
| Download: ML19344A748 (2) | |
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15219 August 11, 1980 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Attention:
Steven A. Varga, Chief Operating Reactors Branch No. 1 Division of Operating Reactors Washington, D.C.
20555
Reference:
Beaver Valley Power Station-Unit No. 1 Docket No. 50-334 Seismic Reanalysis of Piping Systems Gentlemen:
In response to the Show Cause Order of March 13, 1979, we are transmitting herewith our final report on the seismic reanalysis of dynamically analyzed piping for Beaver Valley Power Station Unit No.
1.
This report provides the results of Stone & Webster's reanalysis of all safety related piping that was originally analyzed using the SHOCK II comput-er program which the NRC determined to be unsatisf actory.
The reanalysis was performed using the NUPIPE-SW code which ap-plied the SRSS methodology for load combinations as currently required by the NRC.
Included in the report are the detailed results of the stress reanalysis for piping, supports, penetrations, and i
equipment nozzles.
The specific hardware modifications that resulted from calculated overstressed conditions determined in the reanalysis are identified in the report.
All of the modifications defined have been incor-porated in the plant during the current extended refueling and modification outage.
A total of 131 problems were reanalyzed along with 1,481 pipe supports, 149 nozzles, and 64 penetrations.
There were no piping, nozzle, or penetration modifications required as a result of this reanalysis.
A total of 167 pipe supports were modified.
This report summarizes the final results of the 9
reanalysis and modifications to the piping which had original-ly been analyzed using the SHOCK II subroutine.
THIS DOCUMEli CONTAINS i
i v. POOR QUAUTY PAGES 8008220lhe,
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Beaver Valley Power Station-Unit No. 1 Docket No. 50-335 Seismic Reanalysis of Piping Systems j
Page 2 We believe that this repo r t fulfills all commit-ments made by the Duquesne Light Company related to the re-analysis and modifications of computer analyzed safety related piping systems installed in the Beaver Valley Power Station Unit No.
1.
Very truly yours, E.
Woolever Vice President (CORPORATE SEAL)
Attest:
b a <r M
um it g
Joan S.
Se nct'yylhyn Assistant Secreta COMMONWEALTH OF PENNSYLVANIA)
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SS:
COUNTY OF ALLEGHENY
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on this
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day o f //rS t '.) T, 1980, before me, DONAT3 W. MANNAW, a Notary Public in and for said Commonwealth and County, personally appeared E. J. Woolever, who being duly
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sworn, deposed, and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, and (3) the statements set forth in tr.e Submittal are true and correct to
-the best of his knowledqe, information, and belief.
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9tNALB W. SHANNON. NOTARY PUBUC PITTSBURGH, ALLEGHENY COUNTY MY COMMISSION EXPIRES JUNE 7,1983 Attachments