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Kentucky disburses $10M in nuclear grants
The Kentucky Nuclear Energy Development Authority (KNEDA) recently distributed its first awards through the new Nuclear Energy Development Grant Program, which was established last year. In total, KNEDA disbursed $10 million to a variety of companies that will use the funding to support siting studies, enrichment supply-chain planning, workforce training, and curriculum development.
Colin Weaver, Gary Cooper, Christopher Perfetti, David Ampleford, Gordon Chandler, Patrick Knapp, Michael Mangan, Jedediah Styron
Fusion Science and Technology | Volume 78 | Number 2 | February 2022 | Pages 119-133
Technical Paper | doi.org/10.1080/15361055.2021.1961540
Articles are hosted by Taylor and Francis Online.
A forward analytic model is required to rapidly simulate the neutron time-of-flight (nToF) signals that result from magnetized liner inertial fusion (MagLIF) experiments at Sandia’s Z Pulsed Power Facility. Various experimental parameters, such as the burn-weighted fuel-ion temperature and liner areal density, determine the shape of the nToF signal and are important for characterizing any given MagLIF experiment. Extracting these parameters from measured nToF signals requires an appropriate analytic model that includes the primary deuterium-deuterium neutron peak, once-scattered neutrons in the beryllium liner of the MagLIF target, and direct beamline attenuation. Mathematical expressions for this model were derived from the general-geometry time- and energy-dependent neutron transport equation with anisotropic scattering. Assumptions consistent with the time-of-flight technique were used to simplify this linear Boltzmann transport equation into a more tractable form. Models of the uncollided and once-collided neutron scalar fluxes were developed for one of the five nToF detector locations at the Z-Machine. Numerical results from these models were produced for a representative MagLIF problem and found to be in good agreement with similar neutron transport simulations. Twenty experimental MagLIF data sets were analyzed using the forward models, which were determined to only be significantly sensitive to the ion temperature. The results of this work were also found to agree with values obtained separately using a zero scatter analytic model and a high-fidelity Monte Carlo simulation. Inherent difficulties in this and similar techniques are identified, and a new approach forward is suggested.