Abstract: 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.

Abstract: A compressor assembly including a housing having an oil sump containing a liquid lubricant, a compressor mechanism disposed within the housing, a vertical, rotatable shaft associated with the compressor mechanism and provided with a conduit having a downwardly directed open end extending beneath the surface level of the lubricant and through which oil is conveyed to the compressor mechanism, whereby the lubricant is drawn into the conduit open end, and a guard in surrounding relationship with, and having an aperture disposed beneath and proximate to, the conduit open end, the guard fixed relative to the housing, the sump in fluid communication with the conduit through the aperture.