A silicon carbide flow reactor fluidic module comprises a monolithic closed-porosity silicon carbide body and a tortuous fluid passage extending through the silicon carbide body, the tortuous fluid passage lying within two or more layers with the silicon carbide body, the tortuous passage having an interior surface, the interior surface having a surface roughness of less than 10 μm Ra. A method of forming the fluidic module is also disclosed.

A silicon carbide flow reactor fluidic module comprises a monolithic closed-porosity silicon carbide body and a tortuous fluid passage extending through the silicon carbide body, the tortuous fluid passage lying within two or more layers with the silicon carbide body, the tortuous passage having an interior surface, the interior surface having a surface roughness of less than 10 μm Ra. A method of forming the fluidic module is also disclosed.

A process for preparing a sintered silicon carbide body including sintering a sample including silicon carbide particles to form a shaped sintered silicon carbide body, the particles containing a silicon carbide core and a surface layer containing carbon and oxygen, the sample having at least 90 weight % being C or Si and having a carbon to silicon molar ratio molC/molSi higher than 1 and a carbon in excess to oxygen molar ratio Cex/molO which is higher than 0.5 and lower than 5.3.

The invention provides a process for manufacturing ceramics and refractories comprising the steps of producing a porous powder comprising nanograin sized particles wherein the particles have a Young’s modulus value that is smaller in value compared to the same crystalline material; compacting and processing the powder such that the powder forms a stable homogeneous composite; and sintering the composite for a time and temperature to lead to uniform shrinkage of the composite to make a dense homogenous material.

The invention provides a process for manufacturing ceramics and refractories comprising the steps of producing a porous powder comprising nanograin sized particles wherein the particles have a Young’s modulus value that is smaller in value compared to the same crystalline material; compacting and processing the powder such that the powder forms a stable homogeneous composite; and sintering the composite for a time and temperature to lead to uniform shrinkage of the composite to make a dense homogenous material.

The present disclosure relates to an electrostatic chuck and a method of manufacturing the same. A problem in that the yield of a wafer is reduced due to a partial destruction phenomenon attributable to thermal expansion of an electrostatic chuck is solved and the lifespan of a wafer is increased by making a coefficient of thermal expansion of a lower plate of an electrostatic chuck similar to a coefficient of thermal expansion of an upper plate of the electrostatic chuck.

The present disclosure relates to an electrostatic chuck and a method of manufacturing the same. A problem in that the yield of a wafer is reduced due to a partial destruction phenomenon attributable to thermal expansion of an electrostatic chuck is solved and the lifespan of a wafer is increased by making a coefficient of thermal expansion of a lower plate of an electrostatic chuck similar to a coefficient of thermal expansion of an upper plate of the electrostatic chuck.

A nuclear reactor system includes a nuclear reactor core disposed in a pressure vessel. Nuclear reactor system further includes control drums disposed longitudinally within the pressure vessel and laterally surrounding fuel elements and at least one moderator element of the nuclear reactor core to control reactivity. Each of the control drums includes a reflector material and an absorber material. Nuclear reactor system further includes an automatic shutdown controller and an electrical drive mechanism coupled to rotatably control the control drum. Automatic shutdown controller includes a counterweight to impart a bias and an actuator. To automatically shut down the nuclear reactor core during a loss or interruption of electrical power from a power source to the electrical drive mechanism, the actuator is coupled to the counterweight and responsive to the bias to align the absorber material of one or more control drums to face inwards towards the nuclear reactor core.

An enhanced architecture for a nuclear reactor core includes several technologies: (1) nuclear fuel tiles (S-Block); and (2) a high-temperature thermal insulator and tube liners with a low-temperature solid-phase moderator (U-Mod) to improve safety, reliability, heat transfer, efficiency, and compactness. In S-Block, nuclear fuel tiles include a fuel shape designed with an interlocking geometry pattern to optimize heat transfer between nuclear fuel tiles and into a fuel coolant and bring the fuel coolant in direct contact with the nuclear fuel tiles. Nuclear fuel tiles can be shaped with discontinuous nuclear fuel lateral facets and have fuel coolant passages formed therein to provide direct contact between the fuel coolant and the nuclear fuel tiles. In U-Mod, tube liners with low hydrogen diffusivity retain hydrogen in the low-temperature solid-phase moderator even at elevated temperatures and the high-temperature thermal insulator insulates the solid-phase moderator from the nuclear fuel tiles.

In order to enable stable provision of an upward release tube-type ceramic filter used in a molten metal bath and having a side wall with a height of 300 mm or greater, this method for manufacturing a ceramic filter, which is an upward release tube-type integrally molded article for removing unwanted substances from molten metal, has: a step for kneading a mixture of an aggregate comprising ceramic particles, a prescribed binding agent, and water to prepare a base material; a step for integrally forming an upward release tube-type ceramic filter precursor from the prepared base material; step for drying the precursor; a step for providing a retainer for the dried precursor for supporting a side wall of the precursor; a step for subsequently sintering the precursor; and a step for removing the retainer after sintering.