Battelle Energy Alliance, LLC

David H Hurley

Joshua Daw

David Estrada

Lance A Hone

Troy C Unruh

Robert S Schley

Michael D McMurtrey

Kiyo Tiffany Fujimoto

Brenden J Heidrich

Kunal Mondal

Marat Khafizov

Robert D Seifert

A sensor for passively measuring a maximum temperature within a nuclear reactor comprises a substrate, and a plurality of melt wires within a cavity defined within the substrate, at least one melt wire of the plurality of melt wires exhibiting a variable melting temperature along a length of the at least one melt wire. Related sensors and methods of forming the sensors are also disclosed.

Sensors for passively measuring a maximum temperature of a nuclear reactor, and related methods

A method of determining a thermal conductivity and a thermal diffusivity of a material comprises exposing a specimen comprising a substrate of a material and a metallic film over the substrate to an amplitude modulated pump laser beam comprising electromagnetic radiation having a first wavelength and a first modulation frequency to form a pump spot on the metallic film. The specimen is exposed to a probe laser beam comprising electromagnetic radiation having a second wavelength to form a probe spot on the metallic film. A phase shift between the pump laser beam and a reflected probe laser beam is measured while scanning the pump spot relative to the probe spot. A modulation frequency of the pump laser beam is changed to a second modulation frequency and the pump spot is scanned relative to the probe spot while detecting the phase shift. A phase profile of the material is measured and a continuum-based model is fit to the phase profile. Related microscopes and related methods are also disclosed.

Apparatus for determining a thermal conductivity and a thermal diffusivity of a material, and related methods

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Idaho Falls, ID, United States of America

David H Hurley