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Title: IMPROVEMENTS RELATING TO PLUGS WITH LOCKING MEANS FOR NUCLEAR REACTORS

Abstract

ABS>In order to fix a closure plug in the extremity of a reactor channel a series of levers is pivotally mounted in the plug's body, each lever being adapted to rotate about an axis parallel to the plug's axis. In one of its end positions it may engage into an annular groove in the channel wall, while in the second end position the plug is free to be removed. A handling tool for removing the plug comprises an outer tube, the extremity of which joins the channel endnozzle, an inner tube adapted to raove axially in this outer tube and sliding within the inner tube, a handling rod adapted to connect via a bayonet-coupling with a locking rod in the plug. This locking rod is normally locked in one of its positions by a further system of levers pivotally mounted in the plug's body. The unlocking of this rod is performed by thrusting the inner tube of the handling tool against a number of levers of the system, after which the handling rod coupled with the locking rod raay be axially moved in order to control the movement of the levers engaging in the channel wall. Each axle of thesemore » levers is provided with two notches, one of which cooperates with the locking rod for the control of the rotation of the axle, while the other one serves to engage in a groove machined in the inner wall of the inner tube of the handling tool, so that a rotation of said axles between the two end positions simultaneously corresponds to the decoupling of the plug from the channel and its coupling with the handling tool and vice versa. (IIB)« less

Publication Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4683051
Report Number(s):
FR 1305509
NSA Number:
NSA-17-042288
Resource Type:
Patent
Resource Relation:
Patent File Date: 1961 Aug 16; Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
France
Language:
English
Subject:
REACTOR TECHNOLOGY; CLOSURES; CONTROL; NOZZLES; REACTORS; REMOTE HANDLING; SERVOMECHANISMS; TUBES

Citation Formats

. IMPROVEMENTS RELATING TO PLUGS WITH LOCKING MEANS FOR NUCLEAR REACTORS. France: N. p., 1962. Web.
. IMPROVEMENTS RELATING TO PLUGS WITH LOCKING MEANS FOR NUCLEAR REACTORS. France.
. 1962. "IMPROVEMENTS RELATING TO PLUGS WITH LOCKING MEANS FOR NUCLEAR REACTORS". France.
@article{osti_4683051,
title = {IMPROVEMENTS RELATING TO PLUGS WITH LOCKING MEANS FOR NUCLEAR REACTORS},
author = {},
abstractNote = {ABS>In order to fix a closure plug in the extremity of a reactor channel a series of levers is pivotally mounted in the plug's body, each lever being adapted to rotate about an axis parallel to the plug's axis. In one of its end positions it may engage into an annular groove in the channel wall, while in the second end position the plug is free to be removed. A handling tool for removing the plug comprises an outer tube, the extremity of which joins the channel endnozzle, an inner tube adapted to raove axially in this outer tube and sliding within the inner tube, a handling rod adapted to connect via a bayonet-coupling with a locking rod in the plug. This locking rod is normally locked in one of its positions by a further system of levers pivotally mounted in the plug's body. The unlocking of this rod is performed by thrusting the inner tube of the handling tool against a number of levers of the system, after which the handling rod coupled with the locking rod raay be axially moved in order to control the movement of the levers engaging in the channel wall. Each axle of these levers is provided with two notches, one of which cooperates with the locking rod for the control of the rotation of the axle, while the other one serves to engage in a groove machined in the inner wall of the inner tube of the handling tool, so that a rotation of said axles between the two end positions simultaneously corresponds to the decoupling of the plug from the channel and its coupling with the handling tool and vice versa. (IIB)},
doi = {},
url = {https://www.osti.gov/biblio/4683051}, journal = {},
number = ,
volume = ,
place = {France},
year = {1962},
month = {8}
}