Numerical Characterization Of
Vermiculite-concrete Mixture Used As A
Shock Absorber For A Nuclear Waste Container
Author(s)
N. Zaccari, M. Torrigiani & G. Forasassi
Abstract
This paper deals with numerical and experimental analyses of a type B(U)
package for radioactive waste transport. 9 m vertical free drop tests, performed
on reduced scale models, are described and analysed. The experimental results
are compared with numerical simulations performed with FEM computer codes,
considering reduced scale models as well as the prototype. Firstly the paper deals
with the numerical characterization of vermiculite-concrete mixture used as a
shock absorber in this kind of package by considering the literature data and the
experimental test performed at Pisa University. Moreover, the paper shows the
results of a similitude analysis which permits one to extrapolate the data obtained
by means of the reduced scale models to the prototype. Small errors were
obtained considering models of large scale (1:2,5) and medium scale (1:4) in
comparison with the smaller scale results.
Keywords: vermiculite, shock absorber, dimensional analysis, packaging,
radioactive waste.
1 Introduction
Radioactive wastes are shipped in casks designed to prevent the release of the
radioactive material to the environment in normal as well as accidental
conditions. The latter are established by the relevant rules (IAEA
Recommendations) by means of a series of experimental tests. In Italy ENEA
has studied for many years, in collaboration with University of Pisa, several
containers and packages to collect many types of radioactive sources of different
radionuclides no longer used in hospitals around the country. To improve the
Keywords
vermiculite, shock absorber, dimensional analysis, packaging,
radioactive waste.
Related Book
Other papers in this volume
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