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Extensive neutron and gamma radiation contour, shielding efficiency, and spectral measurements were performed during high power TFI'R D-D operations at the tokamak Test Cell inner walls, ceiling, roof, and outer walls, in nearby control rooms, work areas, and personnel pathways, outdoors along the site fence at 125 m, and out to the nearest property lines at 180 m. The results confirmed that the efficiency of the basic radiation shieIding was sufficient to allow the TFI'R D-T experimental p h , and provide empirical guidance for simulating the radiation fields of fume fusion reactors.

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