Abstract
Radiation shielding analysis conducted in support of design development of the contemporary diagnostic systems integrated inside the ITER ports is relied on the use of CAD models. This paper presents the CAD-based MCNP Monte Carlo radiation transport and activation analyses for the Diagnostic Upper and Equatorial Port Plugs (UPP #3 and EPP #8, #17). The creation process of the complicated 3D MCNP models of the diagnostics systems was substantially accelerated by application of the CAD-to-MCNP converter programs MCAM and McCad. High performance computing resources of the Helios supercomputer allowed to speed-up the MCNP parallel transport calculations with the MPI/OpenMP interface. The found shielding solutions could be universal, reducing ports R&D costs. The shield block behind the Tritium and Deposit Monitor (TDM) optical box was added to study its influence on Shut-Down Dose Rate (SDDR) in Port Interspace (PI) of EPP#17. Influence of neutron streaming along the Lost Alpha Monitor (LAM) on the neutron energy spectra calculated in the Tangential Neutron Spectrometer (TNS) of EPP#8. For the UPP#3 with Charge eXchange Recombination Spectroscopy (CXRS-core), an excessive neutron streaming along the CXRS shutter, which should be prevented in further design iteration.
Highlights
The most (~80%) of ITER diagnostic systems are hosted by the Port Plugs which are arranged at 3 levels (Upper, Equatorial, and Lower) depicted in Fig. 1 as Upper Port Plug (UPP), EPP, and Lower Port (LP)
Radiation shielding analysis conducted in support of design development of the contemporary diagnostic systems integrated inside the ITER ports is relied on the use of Computer Aided Design (CAD) models
The most (~80%) of ITER diagnostic systems are hosted by the Port Plugs which are arranged at 3 levels (Upper, Equatorial, and Lower) depicted in Fig. 1 as UPP, EPP, and LP
Summary
The most (~80%) of ITER diagnostic systems are hosted by the Port Plugs which are arranged at 3 levels (Upper, Equatorial, and Lower) depicted in Fig. 1 as UPP, EPP, and LP. Radiation shielding analysis conducted in support of design development of the contemporary diagnostic systems integrated inside the ITER ports is relied on the use of CAD models.
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