ML20210B140

Forwards Request for Addl Info Needed to Complete Evaluation of Quad Cities Station Special Rept 5,Torus Ring Header Support Failure, Including Summary of Dynamic Analysis of Torus Ring Header Sys Subjected to Blowdown Forces

ML20210B140
Person / Time
Site:	Quad Cities, 05000000
Issue date:	11/09/1972
From:	Maccary R US ATOMIC ENERGY COMMISSION (AEC)
To:	Skovholt D US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20209J032	List: ML20209J028 ML20209J102 ML20209J362 ML20209J414 ML20209J428 ML20209J450 ML20209J504 ML20210A204 ML20210A316 ML20210A365 ML20210A410 ML20210A454 ML20210A522 ML20210A538 ML20210A585 ML20210A633 ML20210A720 ML20210B005 ML20210B037 ML20210B073 ML20210B140 ML20210B165 ML20210B193 ML20210B233 ML20210B262 ML20210B269 ML20210B312 ML20210B376 ML20210B424
References
FOIA-87-40 NUDOCS 8705050242
Download: ML20210B140 (2)

Text

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j+ <,, UNITED STATES ATOMIC ENERGY COMMISSION p .' g. WASHINGTON. D.C. 20545 g,

"* NOV 9 1972 Donald J. Skovholt, Assistant Director for Operating Reactors Directorate of Licensing EVALUATION OF REPORT " QUAD CITIES STATION SPECIAL REPORT No. 5, TORUS RING HEADER SUPPORT FAILURE" (TAR-192)

Title Report: Quad Cities Station Special Report No. 5, Torus Ring l

Header Support Failure Originating Organization: Cocoonwealth Edison Company Report No. and Date: Special Report No. 5, October 26, 1972 Adequate response to the enclosed request for additional information k are required before we can complete our review of the subject report.

This report, prepared by the Mechanical Engineering Branch, Directorate of Licensing, concerns dynamic and stress analysis of the torus ring header s,* stem and the failure of hanger supports.

e 669 R. R. Maccary, Assistant Director for Engineering Directorate of Licensing cc:

A. Giambusso, L W. G. Mcdonald, L cc w/ encl:

S. H. Hanauer, DRTA J. M. Hendrie, L D. L. Ziemann, L D. F. Lange, L J. I. Reisland, L $,==--

S. P. Chan, L 8705050242 870428 .

PDR FOIA PDR THOMAS 87-40

]V Request for Additional Information Quad Cities 2 Torus Ring Header Problem Questions ,

1. Provide a summary of the dynamic analysis of the torus ring header system subjected to blowdown forces. Include information on math-ematical model and natural frequency of the system, forcing function of blowdown forces acting on the system, and dynamic response under various loading conditions.

2. Describe tests for pressure distribution and wave propagation conducted at plant site, including procedure, instru=entation, data reduction and input for dynamic analysis. Provide basis for determination of forcing function from test data and comparison between analytical and experimental results.

3. Provide a summary of the stress analysis of the torus ring header system under various static and dynamic loads including effects of thermal variations, earthquake, stress concentration, blowdown, etc.

4. Provide a summary of the fatigue analysis of the ring heade*, hangers and parts which are subjected to cyclic loads during blowdown tests.

Include information on frequency of tests, expected number of stress cycles, and fatigue usage factors.

5. Provide a summary of the stress analysis of the torus wall in the vicinity of hanger pads due to vibratory action of ring header and hangers. Include among other stresses the possibilicy of fatigue .

failure.