Inherent limitation in toxicity reduction associated with fast energy amplifiers
In the recently proposed Fast Energy Amplifier (F-EA) closed cycle concept, the spent fuel with burnup of greater than 100 MWd/kg initial heavy metal (IHM) is removed, reprocessed to remove fission products, and returned to the subcritical unit together with natural thorium to compensate for burn fuel. Potentially, actinide toxicity is reduced to zero in this scheme. In reality, of course, the actinide toxicity is reduced to the small fraction lost to the waste through reprocessing and refabrication. In this paper results are presented of calculations on the irradiation of thorium in a fast flux to a burnup of 100 MWd/kg to estimate the amounts of U, Pa, Th etc, in the spent fuel. A model for the reprocessing and refabrication of this waste is developed with particular emphasis on processing losses. This procedure of irradiation to a burnup of 100 MWd/kg, removal from the unit, reprocessing of the waste and refabrication of fresh fuel is then repeated to monitor the build-up of actinides over many such cycles. Using typical values for processing losses, the resulting actinide toxicity in the waste is calculated.
Bibliographic Reference: Paper presented : Second International Conference on Accelerator-Driven Transmutation Technologies and Applications, Kalmar (SE), June 3-7, 1996
Availability: Available from (1) as Paper EN 39903 ORA
Record Number: 199610905 / Last updated on: 1996-09-16
Original language: en
Available languages: en