Neutronics analysis for integration of ITER diagnostics port EP10

Shutdown dose rate calculations have been performed on an integrated ITER C-lite neutronics model with equatorial port 10. A ‘fully shielded’ configuration, optimised for a given set of diagnostic designs (i.e. shielding in all available space within the port plug drawers), results in a shutdown dos...

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Bibliographic Details
Published in:Fusion engineering and design 2016-11, Vol.109-111, p.1109-1113
Main Authors: Colling, Bethany, Eade, Tim, Joyce, Malcolm J., Pampin, Raul, Seyvet, Fabien, Turner, Andrew, Udintsev, Victor
Format: Article
Language:English
Subjects:
Diagnostic port
ITER
MCNP
Neutronics
Shutdown dose rate
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Summary:Shutdown dose rate calculations have been performed on an integrated ITER C-lite neutronics model with equatorial port 10. A ‘fully shielded’ configuration, optimised for a given set of diagnostic designs (i.e. shielding in all available space within the port plug drawers), results in a shutdown dose rate in the port interspace, from the activation of materials comprising equatorial port 10, in excess of 2000μSv/h. Achieving dose rates of 100μSv/h or less, as required in areas where hands-on maintenance can be performed, in the port interspace region will be challenging. A combination of methods will need to be implemented, such as reducing mass and/or the use of reduced activation steel in the port interspace, optimisation of the diagnostic designs and shielding of the port interspace floor. Further analysis is required to test these options and the ongoing design optimisation of the EP10 diagnostic systems.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2016.01.013