ML20237H658

Discusses Significant Differences Between Results of Stress Analyses of Plant Safety Injection Piping Using Two Different But Equivalent Computer Programs Identified by Region I Inspectors.Review Requested.W/O Stated Encls

ML20237H658
Person / Time
Site:	Beaver Valley
Issue date:	02/23/1979
From:	Jordan E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:	Vollmer R Office of Nuclear Reactor Regulation
Shared Package
ML20237H627	List: IA-87-470, Discusses Significant Differences Between Results of Stress Analyses of Plant Safety Injection Piping Using Two Different But Equivalent Computer Programs Identified by Region I Inspectors.Review Requested.W/O Stated Encls ML20237H623 ML20237H658
References
FOIA-87-470 NUDOCS 8708250100
Download: ML20237H658 (2)

Text

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ILI,j NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Sf-Mf E,)(J/

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FEB 2 31979 MEMORANDUM FOR: R. H. Vollmer, Assistant Director  !

for Systems and Projects, NRR 4

FROM: E. L. Jordan, Assistant Director y

for Technical Programs, IE

SUBJECT:

STRESS ANALYSIS FOR BEAVER VALLEY SAFETY INJECTION h .

PIPING

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. y ) .j Region I inspectors have identified what appears to be significant 11 '

differences between the results of stress analyses of safety injection p M piping using two different but supposedly equivalent computer programs.

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Because the results of the two programs differ considerably and kk resulted in modifications of certain pipe support systems in some instances, we are oncerned that the original design of the piping

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I may have been nonconservative. We believe that it would be appropriate for D0R to review with the licensee the need for reconciling these

[ ] results. This concern has been informally discussed with D. Wigginton of your staff by RI representatives and it is our ih understanding that the project manager has initiated a review based on information provided by the region. The purpose of this memorandum '

is to formalize the request for a review. The information provided I by the region is enclosed.

8708250100 870820 Edwar[p . Jordan, Assistant Director s00WE Bh-470 PDR n ograms Divi ion of Reactor Operations Inspection ,

CONTACT: R. W. Woodruff, TP N 49-28180 yf 1

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R. H. Vollmer 2 FEB 2 31979

Enclosure:

Memo R. R. Keimig, RI l' to E. L. Jordan dated 1/18/79 i

cc: w/ encl. i D. L. Wigginton, NRR w/o encl. {

A. Schwencer, NRR E. J. Brunner, RI R. R. Keimig, RI D. A. Beckman, RI l

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 -     <              o                       W ASHINGToN, D. C. 20565 5           :-l                                                                                                                       I

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MAR 211979 j NOTE TO FILES: March 21, 1979 TELECON WITH STONE AND WEBSTER I called Mr. Kennedy of Stone and Webster to discuss my March 20, 1979 memo regarding future action to resolve outstanding seismic questions on the five shut-down plants. The purpose of the call was to clarify the type of reanalyses required for each plant. Discussed were:

1. Sizes of small piping that is designed using chart or other manual methods should be identi fi ed. If the methods used for such small piping are different than the methods currently used the differences should be noted and justified.

2. Reanalysis of primary system piping performed by NSSS is not required.

3. All safety related piping (other than Item 1 and 2) and supports are to be analyzed or reanalyzed as needed using an acceptable code.

(~ , YM'YS Victor Stello,- Director Division of Operating Reactors I b B {a. Sf' ac l

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DISTRIBUTION H. R. Denton E. G. Case D. Eisenhut R. Vollmer B. Grimes Local PDR ) NRC PDR A. Schwencer T. Ippolito , V. Noonan D. Wigginton S. Hos ford 4 R. Reed . l R. LaGrange l P. Polk C. Nelson D. Neighbors K. Wichman K. Herring Docket Files 50-334 50-280 , 50-281 50-333 50-309 _ _ - - _ _ -_ _ _ __- _ - __- _____-____ - _- _ - -_ _ _-_- _ -_ ____-_- _-}}