Fast Reactors and Accelerator Driven Systems Knowledge Base

Conference Article: 3-D pneumatic seismic isolation of nuclear power plants

Beliaev, V.S.; Vinogradov, V.V.; Kostarev, V.V.; Kuzmitchev, V.P.; Privalov, S.A.; Siro, V.A.; Krylova, I.N.; Dolgaya, A.A.; Uzdin, A.M.; Vasiliev, A.V. (Research Center of Fundamental Engineering, CKTI-Vibroseism, St. Petersburg (Russian Federation))

Abstract

This paper describes the work carried at the Russian Federation Research Center of Fundamental Engineering (RCFE), in development of innovative pneumatic multicomponent low-frequency seismic isolation bearings for advanced nuclear power plants.This device incorporates both supporting spherical elements, which provide displacements in the horizontal direction, and pneumatic dampers with rubber diaphragms for displacement in the vertical direction. To decrease the relative displacements of the isolated object the system uses viscoelastic dampers. Damping devices had been specially elaborated for the reactor building seismic isolation system as a result of substantial advances in the design and operation of the HD-type hydrodampers, created at the CKTI VIBROSEISM. The procedures developed have been used for comparison of the test and computer data on model isolated steel structure (MISS) and isolated rigid mass (IRM) isolators produced by ENEA and KAERI. Most recent work has concentrated on the development of mathematical models of isolators and isolated nuclear structures. Force-deformation characteristics of the HDRB model had been calculated on the basis of a special method of non-linear elastic theory using the continual transformations method.

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key words: bearings; coordinated research programs; mathematical models; mechanical structures; nonlinear problems; nuclear power plants; numerical analysis; seismic isolation; soil-structure interactions; steels

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Reference:

Final report of a co-ordinated research project 1996-1999

International Atomic Energy Agency, Vienna (Austria)

IAEA-TECDOC--1288, pp:167-190