Neutronics-processing interface parameters have large impacts on the neutron economy and transmutation performance of an aqueousbased Accelerator Transmutation of Waste (ATW) system. A detailed assessment of the interdependence of these blanket neutronic and chemical processing parameters has been performed. Neutronic performance analyses requi’re that neutron transport calculations for the A’T...

The neutronic performance of small size critical dedicated burners is investigated here according to the type of recycling performed (MA supply alone or together with some fissile element), the nature of the possible fissile supply (Pu, enriched U, U bred from Th), the coolant type (sodium or lead). The main neutronic parameters are given, such as reactivity coefficients, together with mass bal...

background: decrease of economically accessible uranium resources motivates consideration of breeding of fertile elements such as thorium. material and method: thorium oxide fuel burn up calculation of a simulated research reactor cooled heavy water has been proposed in the present work using mcnpx 2.6 code. two 233u and 235u isotopes have been used as fissile element of thorium oxide fuel. 135...

I show that the usual model of the rotational response of a neutron star, which predicts rotation-induced neutronic vortices and no rotation-induced protonic vortices, does not hold (i) beyond a certain threshold of entrainment interaction strength nor (ii) in the case of nonzero Sigma(-) hyperon gap. I show that in both of these cases the rotational response involves the creation of phase wind...

This work addresses applications of the classical harmony search (HS), improved harmony search (IHS) and the harmony search with differential mutation based pith adjustment (HSDM) to PWR core reloading pattern optimization problems. Proper loading pattern of fuel assemblies (FAs) depends on both neutronic and thermal–hydraulic aspects; obtaining optimal arrangement of fuel assemblies, FA, in a ...

Accurate neutronic characterizations of fusion power plant designs are essential in determining their operational parameters. The neutron wall loading (NWL), tritium breeding ratio (TBR), and nuclear heating distribution are parameters that must be determined for adequate shielding and protection and fuel self-sustainability of a fusion power plant. After determining the NWL for the first wall ...

Twoand three-dimensional numerical benchmark cases based on the Compact Nuclear Power Source (CNPS) experiments conducted at the Los Alamos National Laboratory (LANL) in the 1980s have been specified for the validation and verification of Very High Temperature Reactor (VHTR) physics codes. Previous evaluation of the CNPS experiments has shown that the experimental tests could be useful for the ...