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ECN publication
Accelerator driven systems. ADS benchmark calculations. Results of stage 2. Radiotoxic waste transmutation
Published by: Publication date:
ECN NUC 1-12-1998
ECN report number: Document type:
ECN-R--98-022 Other
Number of pages: Full text:
28 Download PDF  

This report contains the results of calculations made at ECN-Petten of abenchmark to study the neutronic potential of a modular fast spectrum ADS (Accelerator-Driven System) for radiotoxic waste transmutation. The study is focused on the incineration of TRans-Uranium elements (TRU), Minor Actinides (MA) and Long-Lived Fission Products (LLFP), in this case "9"9Tc. The benchmark exercise is made in the framework of an IAEA Co-ordinated Research Programme. A simplified description of an ADS, restricted to the reactor part, with TRU or MA fuel (keff=0.96) has been analysed. All spectrum calculations have been performed with the Monte Carlo code MCNP-4A. The burnup calculations have been performed with the code FISPACT coupled to MCNP-4A by means of our OCTOPUS system. The cross sections are based upon JEF-2.2 for transport calculations and supplemented with EAF-4 data for inventory calculations. The determined quantities are: core dimensions, fuel inventories, system power, sensitivity on external source spectrum and waste transmutation rates. The main conclusions are: The MA-burner requires only a small accelerator current increase during burnup, in contrast to the TRU-burner. The "9"9 Tc-burner has a large initial loading; a more effective design may be possible. 5 refs.

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