Float level switch for a nuclear power plant containment vessel

Details Float level switch for a nuclear power plant containment vessel Float level switch for a nuclear power plant containment vessel

1991-04-05

1993-11-16

Broome, Harold

Electricity: circuit makers and breakers

Float

Float and pressure

335206, H01H 3600, H01H 3518

Patent

active

052626040

ABSTRACT:
This invention is a float level switch used to sense rise or drop in water level in a containment vessel of a nuclear power plant during a loss of coolant accident. The essential components of the device are a guide tube, a reed switch inside the guide tube, a float containing a magnetic portion that activates a reed switch, and metal-sheathed, ceramic-insulated conductors connecting the reed switch to a monitoring system outside the containment vessel. Special materials and special sealing techniques prevent failure of components and allow the float level switch to be connected to a monitoring system outside the containment vessel.

REFERENCES:
patent: 4213110 (1980-07-01), Holce
patent: 4329550 (1982-05-01), Verley
patent: 4833441 (1989-05-01), Okada et al.

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