Objective
To evaluate and, if possible, further reduce the risk associated with the preparation, processing and temporary storage of nuclear fuels by studying actinide formation and recycling, generation and dispersion of nuclear aerosols and selected topics related to the reprocessing of nuclear fuels.
Progress to end 1990
The results of a KNK II irradiation experiment with minor actinides has been compared to theoretical calculations in cooperation with CRIEPI, and general agreement was found. The post-irradiation examination of the SUPERFACT experiment in Phenix has begun. As a follow up of the workshop on Transmutation and Partitioning working groups have formed to define future research needs. A new separation scheme for minor actinides has been set up. - The size distribution of resuspended oxide fuel particles from burning substrates (latex, aluminium) was measured. A facility was conceived and designed to study the behaviour of nuclear aerosols in long ducts. Results of project work have been presented at 5 international conferences. One article appeared in Radiochimica Acta.
Detailed description of work foreseen in 1991 (expected results)
Destructive post-irradiation examination of SUPERFACT will start. The analyses of the second irradiation experiment in KNK II will begin. The knowledge base to compare proposed transmutation strategies will be tested. Basic studies will include work on phase diagrams, thermal conductivity and dissolution on different fuels. Minor actinides will be recovered from scrap. Studies to improve the separation of minor actinides from high level waste begin. - A facility will be commissioned and experiments started to investigate aerosol behaviour in long ducts. - FIRE-experiments will be performed upon request.
Short description of evolution of work in 1992
The recovery of minor actinides from specially prepared irradiated fuel will start. Cross sections for minor actinide transmutation will be deduced from the irradiation experiments. Key experimental studies to test other transmutation schemes will begin. Basic data for different minor actinide containing fuels will be measured. - Duct-experiments will continue in an effort to characterize nuclear aerosols in various accident scenarios .
Topic(s)
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76125 Karlsruhe
Germany