Plenum chamber length measurement system for nuclear fuel

Details Plenum chamber length measurement system for nuclear fuel Plenum chamber length measurement system for nuclear fuel

1975-01-10

1976-07-06

Aegerter, Richard E.

Geometrical instruments

Area integrators

Electrical

33174L, 176 19R, G01B 714

Patent

active

039673820

ABSTRACT:
A system for the measurement of the length of the plenum chamber in a nuclear fuel rod, both before and after service in the nuclear reactor. The system basically comprises inserting the fuel rod into a casing having an eddy current sensing coil therein and advancing it until the coil output provides a signal indicative of the end of the plenum spring being centrally located within the coil. At an end of the casing is provided a plenum chamber length transducer of the displacement type, such as a linear variable differential transformer, which contacts the adjacent end cap of the fuel rod and when the coil provides an appropriate readout corresponding to proper location of the plenum spring end produces an output signal which is indicative of the length of the plenum chamber.

REFERENCES:
patent: 2969674 (1961-01-01), Ogle
patent: 3813286 (1974-05-01), Goldman et al.

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