Position indicator

Details Position indicator Position indicator

1980-02-19

1981-12-08

Cangialosi, Sal

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

Position detection

250561, G21C 1708, G21C 1700

Patent

active

043046304

ABSTRACT:
A nuclear reactor system is described in which a position indicator is provided for detecting and indicating the position of a movable element inside a pressure vessel. The movable element may be a valve element or similar device which moves about an axis. Light from a light source is transmitted from a source outside the pressure vessel to a first region inside the pressure vessel in alignment with the axis of the movable element. The light is redirected by a reflector prism to a second region displaced radially from the first region. The reflector prism moves in response to movement of the movable element about its axis such that the second region moves arcuately with respect to the first region. Sensors are arrayed in an arc corresponding to the arc of movement of the second region and signals are transmitted from the sensors to the exterior of the reactor vessel to provide indication of the position of the movable element.

REFERENCES:
patent: 3098811 (1963-07-01), Guidi
patent: 3173844 (1965-03-01), Jones
patent: 3265584 (1966-08-01), Cooper
patent: 3600578 (1971-08-01), Porges et al.
patent: 3737372 (1975-06-01), Debergh
patent: 4205304 (1980-05-01), Moor
patent: 4229069 (1980-10-01), Motin et al.

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