Position indicator

Patent · Thu Jan 01 00:00:00 EST 1981

OSTI ID:864065

Tanner, David E.

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.

• Research Organization: GA Technologies Inc., San Diego, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AT03-76SF71023
• Assignee: The United States of America as represented by the United States Department of Energy (Washington, DC)
• Patent Number(s): 4,304,630
• Application Number: 06/122295
• OSTI ID: 864065
• Resource Relation: Patent File Date: 1980 Feb 19
• Country of Publication: United States
• Language: English

Related Subjects

position
indicator
nuclear
reactor
described
provided
detecting
indicating
movable
element
inside
pressure
vessel
valve
similar
device
moves
axis
light
source
transmitted
outside
region
alignment
redirected
reflector
prism
displaced
radially
response
movement
arcuately
respect
sensors
arrayed
corresponding
signals
exterior
provide
indication
light source
reactor vessel
pressure vessel
nuclear reactor
valve element
movable element
region inside
position indicator
similar device
/376/250/976/