Neutronic effects of diagnostic shield module length on radiation environment of ITER diagnostic generic upper port plug

Serikov, A.; Bertalot, L.; Fischer, U.; Juárez, R.

doi:10.1016/j.fusengdes.2018.04.040

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…Due to the DSM length, any port plug based in the box-based DSM will never meet the SDDR limit, regardless the shielding assumed inside. The same behavior has been observed in the upper ports [21].…”

Section: Additional Considerations On the Shieldingsupporting

confidence: 82%

The use of the long modular diagnostics shield module to mitigate shutdown dose rates in the ITER diagnostics equatorial ports

et al. 2018

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The ITER equatorial port plugs are submitted to a drained weight limit of 45 T. This limitation can conflict with their radiation shielding demands, although some weight margin is being discussed. The port interspaces are subject to a shutdown dose rate limit of 100 µSv h −1 after 10 6 s of cooling time. To meet it, the port plugs must show a neutron flux attenuation comparable to their neighborhood, despite considering penetrations to host systems. Most of this task relies on the drawer shield module (DSM). In this work, two DSM concepts are analyzed with this perspective: the box-based DSM and the modular DSM. Regardless the penetrations, the box-based DSM leads to unsatisfactory port plugs to meet both weight and SDDR requirements. On the contrary, the modular DSM shows a performance which allows for the adoption of such DSM concept, or equivalent, a port may comply with both requirements at the same time, provided the penetrations are well designed.

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Section: Additional Considerations On the Shieldingsupporting

confidence: 82%