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Device for handling an absorbent control rod of a nuclear reactor

A technology of nuclear reactors and absorbing rods, applied in the control of nuclear reactions, nuclear reactors, reactors, etc., can solve problems such as blocking, jamming, and friction, and achieve the effects of reducing chemical and nuclear hazards, eliminating faults, and reducing maintenance operations

Active Publication Date: 2016-10-26
COMEX NUCLEAIRE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such leaks are due to the observed build-up of sodium aerosol deposits on moving mechanical parts causing friction or even seizure and blocking of mechanisms required for maintenance operations

Method used

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  • Device for handling an absorbent control rod of a nuclear reactor
  • Device for handling an absorbent control rod of a nuclear reactor
  • Device for handling an absorbent control rod of a nuclear reactor

Examples

Experimental program
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Embodiment Construction

[0114] Figure 1A Schematic representation of a device 1 for actuating a control rod according to the invention, which is arranged on a closing plate 10 of a reaction vat 13, wherein only two fuel assemblies 14 and one absorption control rod 11 are shown, the absorption control rod 11 being in the In its cylindrical casing 12, the cylindrical casing 12 is on the floor of the bucket. According to the invention, the rod control manipulator 1 has a vertical longitudinal axis XX' arranged along the longitudinal axis of the rod housing or sheath 12 .

[0115] The rod control manipulator 1 comprises a rod control rod 3 arranged along a vertical longitudinal axis XX' above the housing 12 of the absorbing rod 11 inside a guide sheath 3a comprising a Cylindrical cross section.

[0116] The rod control lever 3 comprises gripping means 4 in the form of a gripper at the lower end of the lever 3 , capable of gripping the upper end 11 a of the absorption rod 11 .

[0117] The manipulating...

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PUM

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Abstract

The present invention relates to a device (1) for handling an absorbent rod (11) for controlling a nuclear reactor, comprising (a) an upper motor compartment (2) positioned on the closing slab (10) of the reactor vat (13), (b) a rod control stem (3), extending in said motor compartment (2) and in a guide sheath (3a) extending inside said vat, characterized in that it comprises (1) a sealed static confinement chamber (5) made of non-magnetic material arranged inside said upper compartment, (2) a first synchronous magnetic coupling system (6a) for transmitting linear translational movement without mechanical contact comprising a first outer component (6a-1) arranged outside said chamber (5), and able to be vertically translated, and a first inner component (6a-2) arranged inside said chamber (5), integral with said rod control stem (3), a magnetic coupling force of said first outer component (6a-1) and said first inner component (6a-2) making it possible, when the first outer component (6a-1) is displaced in vertical translation, for said first inner component (6a-2) and the rod control stem (3) follow a displacement in vertical translation, and (3) said motor compartment (2) comprising first motorized mechanical means for transmitting translational displacements (2a) of said first outer component (6a-1) of said first magnetic coupling system (6a).

Description

technical field [0001] The invention relates to a device for manipulating absorbing rods for controlling the power of a nuclear reactor, preferably of the fast neutron reactor (FNR) type, in particular sodium cooled. Background technique [0002] Generally, in nuclear reactors, absorber rods of neutron-absorbing material, such as boron-based materials, are used to provide constant control of the chain reaction, which enables control of the neutron power of the reactor. These absorbent rods are also called "control rods". The absorber rods are arranged vertically to be able to translate vertically in sheaths between the fuel rods. These absorbing rods can be raised (extracted) or translated vertically depending on the desired neutron flux. They are thus able to control the reactor. More precisely, the absorbing rods are housed in sheaths whose cross-sectional geometry is identical to that of the fuel assemblies (in particular hexagonal), in such a way that they together fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C7/10G21C7/14G21C7/20
CPCG21C7/10G21C7/14G21C7/20G21C1/03G21C7/08Y02E30/30G21C7/12G21C19/06
Inventor J-L·阿劳德D·塞普利斯A·罗伯特
Owner COMEX NUCLEAIRE