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DOE issues new NEPA rule and procedures—and accelerates DOME reactor testing
Meeting a deadline set in President Trump’s May 23 executive order “Reforming Nuclear Reactor Testing at the Department of Energy,” the DOE on June 30 updated information on its National Environmental Policy Act (NEPA) rulemaking and implementation procedures and published on its website an interim final rule that rescinds existing regulations alongside new implementing procedures.
Thomas J. McCarville, Gregory A. Moses, Gerald L. Kulcinski, Ihor O. Bohachevsky
Fusion Science and Technology | Volume 5 | Number 1 | January 1984 | Pages 5-16
Technical Paper | Special Section Contents / ICF Chamber Engineering | doi.org/10.13182/FST84-A23073
Articles are hosted by Taylor and Francis Online.
The frequency dependence of a thermal radiation field complicates the computation of radiative energy transport in optically thin media because the spectrum may be uncoupled from local thermodynamic conditions. A model for combining the effect of the frequency dependence into a radiation temperature chosen to represent the temperature of both local and nonlocal emitting regions is described. The derived equations are much easier to solve than the frequency-dependent equations and can be applied to a broad class of problems. The equations are used to investigate the response of a gas in an inertial confinement fusion (ICF) reaction chamber to target explosions. The response is compared for ambient densities of 1.77 × 1018 and 1.77 × 1017 atom/cm3. The error in using the brightness temperature instead of a color temperature to evaluate the opacities is illustrated. An analytic analysis shows the cooling wave observed from energy releases > 1018 erg will not occur in an ICF cavity. This is confirmed by the numerical calculations.
