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IAEA report confirms safety of discharged Fukushima water
An International Atomic Energy Agency task force has confirmed that the discharge of treated water from Japan’s Fukushima Daiichi nuclear power plant is proceeding in line with international safety standards. The task force’s findings were published in the agency’s fourth report since Tokyo Electric Power Company began discharging Fukushima’s treated and diluted water in August 2023.
More information can be found on the IAEA’s Fukushima Daiichi ALPS Treated Water Discharge web page.
M. E. Fenstermacher, N. A. Uckan
Fusion Science and Technology | Volume 4 | Number 2 | September 1983 | Pages 502-506
Plasma Engineering | doi.org/10.13182/FST83-A22913
Articles are hosted by Taylor and Francis Online.
A formalism has been developed in terms of a drift kinetic equation with a Fokker-Planck collision operator to calculate alpha particle loss and energy deposition rate coefficients for one position in space and for steady-state operating conditions in an ELMO Bumpy Torus (EBT) reactor. Pitch angle and energy scattering terms were retained in the collision term so that the analysis provides information on alpha particle behavior due to pitch angle scattering into loss regions in velocity space and information on alpha energy deposition during slowing down in the device. A square well magnetic field shape is assumed and the resulting particle loss rates and energy deposition rates are calculated. For typical EBT reactor parameters, results show that while 80-90% of the alpha particles are scattered into a pitch angle loss region and lost from the device, more than 70% of the alpha particle energy is deposited in the core plasma and about 1–2% goes to alphas retained in the plasma as ash. Parametric studies are performed, and the sensitivity to plasma potential, the pitch angle, the width of loss regions, and computational procedures are analyzed.