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Title: POSITIONING DEVICE

A positioner is described for a vertical reactor-control rod. The positioner comprises four grooved friction rotatable members that engage the control rod on all sides and shift it longitudinally. The four friction members are drivingly interconnected for conjoint rotation and comprise two pairs of coaxial members. The members of each pair are urged toward one another by hydraulic or pneumatic pressure and thus grip the control rod so as to hold it in any position or adjust it. Release of the by-draulic or pneumatic pressure permits springs between the friction members of each pair to force them apart, whereby the control rod moves quickly by gravity into the reactor.
Authors:
;
Publication Date:
OSTI Identifier:
4199243
Report Number(s):
US 2904168
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Research Org:
Originating Research Org. not identified
Country of Publication:
United States
Language:
English
Subject:
REACTOR TECHNOLOGY; CONTROL ELEMENTS; FRICTION; HYDRAULICS; MECHANICS; OPERATION; PLANNING; PRESSURE; REACTOR SAFETY; REACTORS