ML19339C922
| ML19339C922 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 02/09/1981 |
| From: | Orr R OFFSHORE POWER SYSTEMS (SUBS. OF WESTINGHOUSE ELECTRI |
| To: | |
| Shared Package | |
| ML19339C912 | List: |
| References | |
| NUDOCS 8102120349 | |
| Download: ML19339C922 (2) | |
Text
UNITED STATES OF AMERICA g
NUCLEAR REGULATORY COMMISSION SEFORE THE ATCMIC SAFETY AND LICENSING BOARD In the Matter of
)
)
DUKE POWER COMPANY
)
Docket Nos. 50-369
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50-370 (William 3. McGuire Nuclear
)
Station, Units 1 and 2)
)
TESTIMONY OF R.S.
ORR REGARDING THE McGUIRE CONTAINMENT STRUCTURAL INTEGRITY 1.
Q.
Have you prepared an analysis relating to the ultimate capability of the McGuire containment vessel?
A.
Yes, I have.
2.
Q.
Why did you prepare this analysis?
A.
I had prepared an analysis of the critical sectier. or panel of the Sequoyah containment and had pr4 centr.d the results of the analysis to the Advisory Committee on Reactor Safeguards (ACRS).
This analysis was one of many presented to the ACRS and was concurred with by ACRS in their findings on containment cap-ability submitted to the NRC Commissioners.
Duke asked me to perform a similar analysis for the McGuire containment in order to provide independent verification of their own analysis and to provide additional insight into the local panel behavior.
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3.
Q.
What methodology did you use in performing this analysis?
j A.
I performed an analysis of a finite element model of one quarter of a panel bounded by longitudinal and meridional stiffeners.
Boundary conditions were imposed on the model to account for symmetry.
The nonlinear, large displacement analysis was conducted using the ANSYS ccmputer program using l
shell elements.
Material behavior was assumed to l
be elastic-perfectly plastic with yielding based on a Von Mises yield criterion.
Loading was assumed to be quasistatic uniform internal pressure.
Analyses were performed in a series of load steps increasing from 0 up to a maximum of 68 psig.
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l i 4.
Q.
What conclusion do you reach with respect to your analysis?
A.
I conciuded that the functional capability of the critical panel considered in the analysis would be reached at a limit of 68 psig.
Details of my analysis are attached.
5.
Q.
Based upon your familiarity with structural loading, could the McGuire containment withstand an internal pressure of 67.5 psig?
A.
The analyses performed by Duke demonstrated that the lowest pressure capability of the containment occurred in the panels which were represented by my analysis.
The location of this critical region is consistent with my prior experience on evaluation of the cap-ability of other ice condenser containments.
I would therefore expect based on my analyses that the McGuire containment could withstand an internal pressure of 67.5 psig.
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