Special rotary refueling structure for replacing moving body of control rod assembly

A moving body and control rod technology, which is applied in the control of nuclear reactions, reduction of greenhouse gases, reactor fuel elements, etc., to achieve the effects of simple operation, easy cleaning and drying, and avoiding slippage.
CN112863715AActive Publication Date: 2021-05-28CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA INSTITUTE OF ATOMIC ENERGY
Publication Date
2021-05-28

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Abstract

The invention relates to a special rotary refueling structure for replacing a moving body of a control rod assembly. The special rotary refueling structure comprises an outer sleeve assembly, wherein the moving body at least can partially extend into the outer sleeve assembly, and the moving body and the outer sleeve assembly can relatively move or relatively stand still in an axial direction through the action of a locking structure; the locking structure comprises a locking part arranged on the outer sleeve assembly and a locking groove formed in the moving body; the locking groove is L-shaped and comprises a transverse groove and a vertical groove which communicate with each other; during locking, the locking part ascends to a limited position from the vertical groove, then rotates relative to the moving body and enters the transverse groove; and during unlocking, the locking part rotates from the transverse groove to the moving body reversely and relatively to a limited position and then descends along the vertical groove. The special rotary refueling structure of the invention has the following beneficial effects: under the operation of a refueling machine in a reactor core, the outer sleeve assembly can be reliably locked and unlocked with the moving body, and the outer sleeve assembly can participate in the whole refueling process along with the control rod moving body.
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Description

technical field

[0001] The invention belongs to the field of nuclear industry, and in particular relates to a special rotary refueling structure for replacing a moving body of a control rod assembly. Background technique

[0002] The China Experimental Fast Reactor is the first sodium-cooled fast reactor in China. The shape of the control rod assembly is the same as that of the fuel assembly, and its structure is an integrated structure. The refueling process of the control rod assembly is the same as that of the fuel assembly.

[0003] The internal control rod assembly of the 600MW demonstration fast reactor is improved on the basis of the Chinese experimental fast reactor structure and adopts a split structure. The control rod assembly is composed of two parts: the control rod moving body and the control rod outer sleeve. Adopting this structure can effectively reduce the The height of the container reduces the amount of nuclear waste while improving the utilization of mat...

Claims

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