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Additional info for In-Core Pwr Depos and Thermal Env Monitor for Long-Lived Reactor Cores
001 The W and the m−K W . Thus we m−K have compared the effect of three orders of magnitude difference in the thermal conductivity of the area in question. It is clear that the heat transfer due to convection through the bottom of the sensor dominates all other modes of heat transfer. Figures 28 and 29 show the temperature profile of the alumina sensor after reaching steady state.
This welding used using a TIG welder and argon shielding gas. This sleeve was then shrink fit onto the end of the lower piece of alumina. This titanium piece will be in the zone that experiences the maximum 800° C. during operation. Another titanium piece was tested at 950° C. for four hours, and though it showed some oxidation, there was no loss of mechanical strength. Calculation and testing showed that the sleeve was not removable from the alumina tube even at this higher temperature. 75 inch, it is likely that the maximum temperature experienced by the sleeve itself will be somewhat less than 800° C.
In addition, temperature compensation is currently a topic of study and an issue to which the CHFPS is expected to be less sensitive. The CHFPS sensor maintains a constant temperature difference between two points on the sensor. It employs a temperature differential as the set point variable and involves selecting two points on the sensor and monitoring the temperature difference between them. The planar sensor is an alternative design that promises greater ease of construction and reduced complexity.
In-Core Pwr Depos and Thermal Env Monitor for Long-Lived Reactor Cores