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Abstract

One can design a critical system with fissile material in the form of a thin layer on the inner surface of a cylindrical neutron moderator such as graphite or beryllium. Recently, the properties of critical and near critical systems based on the use of thin actinide layers of uranium, plutonium and americium have been investigated. The thickness of the required fissile layer depends on the type of fissile material, its concentration in the layer and on the geometrical arrangement, but is typically in the micrometer-mm range. The resulting total mass of fissile material can be as low as 100g. Thin fissile layers have a variety of applications in nuclear technology-for example in the design neutron amplifiers for medical applications and fast �fast islands� in thermal reactors for waste incineration. In the present paper, the properties of a neutron booster unit for spallation sources and isotope production have been investigated. In those applications a layer of fissile material surrounds the spallation source. Such a module could be developed for spallation targets in the MYRRHA or MEGAPIE projects.

Additional information

Authors: GALY J, JRC, Institute for Transuranium Elements, Karlsruhe (DE);MAGILL J, JRC, Institute for Transuranium Elements, Karlsruhe (DE);VAN DAM H, Delft University of Technology, Interfaculty Reactor Institute, Delft (NL);VALKO J, Delft University of Technology, Interfaculty Reactor Institute, Delft (NL)
Bibliographic Reference: An oral report given at: The Winter Meeting of the American Nuclear Society: Nuclear Applications in the New Millennium, Reno, NV (US), 11-15 November 2001
Record Number: 200114007 / Last updated on: 2001-11-14
Category: PUBLICATION
Original language: en
Available languages: en
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