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Residual Dose Rate Analysis for the IFMIF/EVEDA Prototype Accelerator

Daniel López, Javier Sanz, Francisco Ogando

Fusion Science and Technology / Volume 62 / Number 1 / July/August 2012 / Pages 252-257

IFMIF / Proceedings of the Fifteenth International Conference on Fusion Reactor Materials, Part A: Fusion Technology

During the IFMIF/EVEDA phase, a 125 mA and 9 MeV deuteron prototype accelerator will be designed and tested for the final IFMIF project. Deuteron losses will occur during operation of the accelerator at several components as well as at the beam stopping, leading to material activation induced by deuterons and/or by secondary neutrons, depending on the location. This work is focused on the residual dose rate assessment inside the accelerator vault due to the radioactive inventory induced in the main accelerator components, the outside concrete structures of the accelerator vault, and the concrete-made local shielding of the beam dump. The results will be useful for maintenance work planning, identifying hot areas in the accelerator region. The adopted computational procedure uses MCUNED for determination of spatial distribution of deuteron and neutron fluxes, ACAB for activation calculations, and MCNPX for transport of decay gammas. Deuteron transport cross sections are taken from TENDL-2010 and decay and activation cross-section data from EAF-2007.

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