Analytical simulation of nonlinear response to seismic test excitations of HDR-VKL (Heissdampfreaktor-Versuchskreislauf) piping system

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:6019099

Srinivasan, M G; Kot, C A ^[1]; Mojtahed, M ^[2]

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1. Argonne National Lab., IL (USA)
2. Purdue Univ., Hammond, IN (USA). Dept. of Mechanical Engineering

The paper describes the analytical modeling, calculations, and results of the posttest nonlinear simulation of high-level seismic testing of the VKL piping system at the HDR Test Facility in Germany. One of the objectives of the tests was to evaluate analytical methods for calculating the nonlinear response of realistic piping systems subjected to high-level seismic excitation that would induce significant plastic deformation. Two out of the six different pipe-support configurations, (ranging from a stiff system with struts and snubbers to a very flexible system with practically no seismic supports), subjected to simulated earthquakes, were tested at very high levels. The posttest nonlinear calculations cover the KWU configuration, a reasonably compliant system with only rigid struts. Responses for 800% safe-shutdown-earthquake loading were calculated using the NONPIPE code. The responses calculated with NONPIPE were found generally to have the same time trends as the measurements but contained under-, over-, and correct estimates of peak values, almost in equal proportions. The only exceptions were the peak strut forces, which were underestimated as a group. The scatter in the peak value estimate of displacements and strut forces was smaller than that for the strains. The possible reasons for the differences and the effort on further analysis are discussed.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: NRC; Nuclear Regulatory Commission, Washington, DC (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6019099
• Report Number(s): CONF-910602-5; ON: DE91006472
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
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& Utilization-- Transportation
42 ENGINEERING
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ACTUATORS
BWR TYPE REACTORS
COMPUTERIZED SIMULATION
DEFORMATION
EARTHQUAKES
ENRICHED URANIUM REACTORS
EXPERIMENTAL REACTORS
HARDENING
HDR REACTOR
MECHANICAL PROPERTIES
NONLINEAR PROBLEMS
PIPES
PLASTICITY
REACTORS
RESEARCH AND TEST REACTORS
SEISMIC EVENTS
SEISMIC WAVES
SIMULATION
STRAIN HARDENING
TESTING
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS