No abstract available

No abstract available

[en] The measurement of a temperature (whatever the type of transducer used) raises three problems: the choice of transducer; where it should be placed; how it should be fixed and protected. These are the three main points examined, after a brief description of the most commonly used thermocouples

[en] Factors limiting the accuracy of temperature measurements with type K and type S sheathed thermocouple assemblies are discussed. The effect of short-range ordering in Chromel is shown to limit the accuracy of temperature measurements made with type K thermocouple to about 1%. Errors of as much as 150% have been observed in type K thermocouples in magnetic fields at temperatures below the Curie temperature of Alumel. Both positive and negative errors were observed when the orientations of the applied magnetic field, the temperature gradient and the axis of the Alumel wire were such as to produce an emf along the thermocouple wire due to the Nernst--Ettingshausen effect

No abstract available

[en] Disclosed herein is a repeating use thermocouple assembly and method of making the same in which a cavity adjacent the tip of the thermocouple is filled with a thermosetting foundry sand and baked in place to provide support for the thermocouple tube without causing stresses during use which could cause breakage of the thermocouple tube

[en] The invention concerns a thermocouple receptacle and a device to be located inside a reactor, that provides a positive seating for the thermocouples immediately next to the outlet of the fuel assemblies and allows a visual inspection to be made of the position of the thermocouples

[en] A thermocouple with several electrodes is presented, its distinguishing features being a very low bulk, a small number of electrodes and a single envelope. Compared with known types of thermocouple it offers a smaller quantity of metal when used in the core of nuclear reactors. In addition the thermocouple has a small diameter and great length, up to 50m or more, and can therefore fit into narrow channels of any shape and be connected to secondary instruments without the need for compensation wires

[en] The manufacture of thermocouple cables and probes is described. Details are given of the cable filling, drawing and testing operations. (U.K.)

[en] The potential errors in temperature measurements employing small diameter (0.5 mm) metal sheathed thermocouples were analyzed for the Core Flow Test Loop experiments at ORNL. The sources of error considered were extension lead wires, reference junctions, the data acquisition system, calibration and decalibration of the sensors, thermal shunting, electrical shunting, electrical leakage, and electrical noise