Seismic damping factors of small bore piping as influenced by insulation and support elements
Seismic damping tests of a prototypical Liquid Metal Fast Breeder Reactor (LMFBR) small bore piping system is described, and measured transient responses to pulse excitations are reported. The test specimen was representative of a typical LMFBR insulated small bore piping system, and it was supported from a rigid test frame by prototypic dead weight supports, mechanical snubbers, and pipe clamps. Various support configurations were tested to assess the response sensitivity to insulation and other nonlinear support characteristics. Damping factors increased significantly due to the insulation and use of mechanical snubbers. Factors much higher than the magnitudes currently allowed in design, by the USNRC Regulatory Guide 1.61, were found. This verified the design values but also pointed out the possibility of undue conservatism and costly overdesign resulting from use of the present design values.
- Research Organization:
- Westinghouse Hanford Company, Richland, WA
- OSTI ID:
- 5453916
- Report Number(s):
- CONF-830607-
- Journal Information:
- Am. Soc. Mech. Eng., Pressure Vessels Piping Div., (Tech. Rep.) PVP; (United States), Journal Name: Am. Soc. Mech. Eng., Pressure Vessels Piping Div., (Tech. Rep.) PVP; (United States) Vol. PVP-VOL. 74; ISSN AMPPD
- Country of Publication:
- United States
- Language:
- English
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Seismic damping factors of small bore piping as influenced by insulation and support elements
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Related Subjects
210500* -- Power Reactors
Breeding
BREEDER REACTORS
CONFIGURATION
DAMPING
DESIGN
EPITHERMAL REACTORS
FAST REACTORS
FASTENERS
FBR TYPE REACTORS
FUNCTIONS
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
MECHANICAL STRUCTURES
NATIONAL ORGANIZATIONS
PIPES
PULSES
REACTOR COMPONENTS
REACTORS
RESPONSE FUNCTIONS
SEISMIC EFFECTS
SEISMIC EVENTS
SENSITIVITY
SHOCK ABSORBERS
SUPPORTS
TRANSIENTS
US NRC
US ORGANIZATIONS