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Godzilla is helping ITER prepare for tokamak assembly
ITER employees stand by Godzilla, the most powerful commercially available industrial robot available. (Photo: ITER)
Many people are familiar with Godzilla as a giant reptilian monster that emerged from the sea off the coast of Japan, the product of radioactive contamination. These days, there is a new Godzilla, but it has a positive—and entirely fact-based—association with nuclear energy. This one has emerged inside the Tokamak Assembly Preparation Building of ITER in southern France.
T. W. L. Sanford, L. J. Lorence, J. A. Halbleib, J. G. Kelly, P. J. Griffin, J. W. Poukey, W. H. McAtee, R. C. Mock
Nuclear Science and Engineering | Volume 114 | Number 3 | July 1993 | Pages 190-213
Technical Paper | doi.org/10.13182/NSE93-A24033
Articles are hosted by Taylor and Francis Online.
An intense reusable source of pulsed photoneutrons is developed that produces ≈0.5 or 1.0 × 1014 neutrons in an ∼15-ns pulse from natural lead or depleted uranium, respectively, on the HERMES III electron accelerator. Corresponding to this source, a numerical model is developed that is applicable to other pulsed-power systems. If Vp represents the peak voltage of HERMES III measured in megavolts, then model predictions show that over the range 12 MV < Vp< 20 MV, the number of neutrons produced per incident electron is 7.2 × 10-6(VP — 11)2.0 and 1.2 × 10-6(VP — 7.4)2 8 in lead and uranium, respectively. Measurements using a set of nuclear activation foils confirm these predictions as well as predictions of the spatial and spectral distribution of the neutrons at Vp = 19 MV.
