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NRC issues draft EA/FONSI for Duane Arnold restart
Efforts by NextEra Energy to restart the Duane Arnold nuclear power plant as early as 2029 continue to move forward with the Nuclear Regulatory Commission's preliminary environmental assessment and determination that the restart would have no significant environmental impacts.
On Thursday, the NRC posted a draft environmental assessment and a finding of no significant impact for the Palo, Iowa, facility; the Federal Register notice was published on Monday. The Department of Energy’s Office of Energy Dominance Financing is a cooperating agency on the draft EA, as the DOE is considering providing financial assistance to the restart project.
C. E. Kessel, F. M. Poli
Fusion Science and Technology | Volume 67 | Number 1 | January 2015 | Pages 220-239
Technical Paper | doi.org/10.13182/FST14-793
Articles are hosted by Taylor and Francis Online.
The conservative physics and conservative technology tokamak power plant ARIES-ACT2 has a major radius of 9.75 m at an aspect ratio of 4.0 and has strong shaping with elongation of 2.2 and triangularity of 0.63. The plasma current is 14 MA, and the toroidal field at the plasma major radius is 8.75 T, making the maximum field at the toroidal field coil 16 T. The no-wall βN reaches ∼2.4, limited by n = 1 external kink mode, and can be extended to 3.2 with a stabilizing shell behind the ring structure shield. The bootstrap current fraction is 77% with a q95 of 8.0, requiring ∼4.0 MA of external current drive. This current is supplied with 30 MW of ion cyclotron radio frequency/fast wave and 80 MW of negative ion neutral beams. Up to 1.0 MA can be driven with lower hybrid (LH) with no wall, and 1.5 or more MA can be driven with a stabilizing shell. Electron cyclotron was examined and is most effective for safety factor control over ρ ∼0.2 to 0.6 with 20 MW. The pedestal density is ∼0.65 × 1020/m3, and the temperature is ∼9.0 keV. The H98 factor is 1.25, n/nGr = 1.3, and the net power to LH threshold power is 1.3 to 1.4 in the flattop. Because of the high toroidal field and high central temperature, the cyclotron radiation loss was found to be high depending on the first-wall reflectivity.