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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.
Yoichi Watanabe
Nuclear Science and Engineering | Volume 118 | Number 3 | November 1994 | Pages 178-185
Technical Paper | doi.org/10.13182/NSE94-A19383
Articles are hosted by Taylor and Francis Online.
Electrical conductivities of weakly ionized nuclear plasmas were computed by numerically solving an electron Boltzmann equation. A pure 3He gas and 3He-Na gaseous mixtures were analyzed. The gases are ionized by fast ions (0.19-MeV tritons and 0.59-MeV protons), which are generated from in situ neutron-3He nuclear reactions. The results show that the electrical conductivity of the 3He-Na gaseous mixtures is higher than that of the pure helium gas because of the enhanced ionization of seeded sodium atoms by subexcitation electrons. This effect is not included in a standard Maxwellian model. An analytical formula of W values for gaseous mixtures was suggested to incorporate the effect of subexcitation electrons. The formula can be applied to analyze chemically complex systems.
