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Abstract

This paper considers some key issues associated with nuclear waste incineration and how these issues can be addressed with the use of accelerator driven systems (ADS). When critical reactor systems are used to burn nuclear waste, the delayed neutron fraction decreases making the control of the system significantly more difficult. For sub-critical accelerator driven systems, it is shown that the spallation neutrons (which are independent of the sub-critical assembly), can be considered as a very much enhanced delayed neutron fraction. As a result, accelerator driven sub-critical systems will react more benignly and can cope with greater reactivity excursions than critical reactor systems. This is especially true for fast neutron systems. The second issue is how much waste has to be dealt with and whether ADSs can cope. The scale of this problem can be significantly reduced by recycling the Pu back into mixed oxide (MOX) as TMOX fuelled pressurized water reactors (PWR). A detailed analysis of this problem is presented. Finally, some conceptual designs are considered for an accelerator driven waste incinerator with a view to starting relatively small scale experiments. The neutronics of some simple geometrical core arrangements are considered.

Additional information

Authors: MAGILL J, JRC Karlsruhe (DE);PEERANI P, JRC Karlsruhe (DE);VAN GEEL J, JRC Karlsruhe (DE);RIEF H, JRC Ispra (IT);WIDER H, JRC Ispra (IT)
Bibliographic Reference: Paper presented: International Atomic Energy Agency Technical Committee Meeting on Feasibility and Motivation for Hybrid Concepts for Nuclear Energy Generation and Transmutation, Madrid (ES), 17-19 September 1997
Availability: Available from (1) as Paper EN 41190 ORA
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