The Status of USITER Diagnostic Port Plug Neutronics Analysis Using Attila
Authors: Russell Feder, Mahamoud Youssef and Jonathan Klabacha
Abstract:
USITER is one of seven partner domestic agencies (DA) contributing components to the ITER project.
Four diagnostic port plug packages (two equatorial ports and two upper ports) will be engineered
and fabricated by Princeton Plasma Physics Lab (PPPL). Diagnostic port plugs as illustrated in Fig. 1
are large primarily stainless steel structures that serve several roles on ITER. The port plugs are
the primary vacuum seal and tritium confinement barriers for the vessel. The port plugs also house
several plasma diagnostic systems and other machine service equipment. Finally, each port plug must
shield high energy neutrons and gamma photons from escaping and creating radiological problems in
maintenance areas behind the port plugs. The optimization of the balance between adequate shielding
and the need for high performance, high throughput diagnostics systems is the focus of this paper.
Neutronics calculations are also needed for assessing nuclear heating and nuclear damage in the port
plug and diagnostic components. Attila, the commercially available discrete-ordinates software package,
is used for all diagnostic port plug neutronics analysis studies at PPPL.
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Submitted to: Proceedings of the American Nuclear Society (ANS) 2013 Winter Meeting,
Washington, DC (November 2013)
OSTI ID: 1148887
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Download PPPL-5025 (pdf 275 KB 5pp)
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