HDR steel-containment vessel dynamic inertance tests. [PWR; BWR]

Conference · Fri Dec 31 23:00:00 EST 1982

OSTI ID:5657660

Arendts, J G

Modal (inertance) tests were conducted on two vessels at the Heissdampfreaktor (HDR) facility located 25 kilometers east of Frankfurt, Federal Republic of Germany. The specific purpose of the tests was to determine the modal properties (frequencies, mode shapes and associated damping ratios) of the test vessels over a frequency range of 1 to at least 33 hertz (Hz) using either an impulse hammer or shaker as a source of input excitation. The results of these tests are intended for use by the US Nuclear Regulatory Commission (NRC) in developing standards for modeling similar structures. Excitation or input forces together with measured vessel responses were processed by a digital modal analyzer. Frequency response functions and associated data were determined and stored on magnetic disks while at HDR. These results were then further processed for determination of the modal properties. A large number of relatively uniformly distributed modal frequencies with associated damping ratios from 2% to 4% of critical were found from evaluation of the frequency response functions.

• Research Organization: EG and G Idaho, Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 5657660
• Report Number(s): EGG-M-16182; CONF-830805-56; ON: DE84000891
• Country of Publication: United States
• Language: English

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