Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor... – Flowmeters
Patent
1990-02-07
1991-11-12
Hunt, Brooks H.
Induced nuclear reactions: processes, systems, and elements
Testing, sensing, measuring, or detecting a fission reactor...
Flowmeters
376245, 376247, G21C 1700
Patent
active
050646044
ABSTRACT:
A sensor assembly comprising a rod-shaped thermally conductive element oriented radially with respect to a flow pipe and two or more thermocouples installed on the thermally conductive element. A first end of the thermally conductive element is arranged in contact with or in thermal communication with the outer periphery of the pipe, while a second end of the thermally conductive element is spaced from the pipe. As a result of heat conduction through the pipe to the first end, a temperature gradient is provided across the thermally conductive element. The temperature gradient exhibits a relatively high temperature near the first end and a relatively low temperature near the second end. The thermocouples are installed along the length of the thermally conductive element. One thermocouple is arranged nearer to the pipe than the other thermocouple. Temperature dependent signals obtained from the thermocouples are transmitted to suitable evaluation electronics. The evaluational electronics determines a temperature difference between the two thermocouples based on the thermocouple signals. The temperature difference is then compared with known or preset values to determine the flow status of the pipe.
REFERENCES:
patent: 3874239 (1975-04-01), Finney
patent: 4031740 (1977-06-01), Achermann
patent: 4484471 (1984-11-01), Swithenbank et al.
patent: 4859076 (1989-08-01), Twerdochlib
Chelliah Meena
Hunt Brooks H.
Westinghouse Electric Corp.
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