Cleaning and drying device for special tool for split type control rod of sodium-cooled fast reactor

Abstract

The utility model relates to the technical field of sodium-cooled fast reactor control rod special tool cleaning and reuse processes, in particular to a sodium-cooled fast reactor split type control rod special tool cleaning and drying device which comprises a transfer container, a lower barrel and a sealing cover. The slot is used for accommodating a control rod special tool; a sealing cover is arranged at the upper end of the transfer container; a lower barrel is arranged at the lower end of the transfer container; the lower end of the lower cylinder is connected with an air inlet A through welding, the lower end of the lower cylinder is connected with a liquid outlet through a flange, and the upper end of the sealing cover is connected with an exhaust hole through a flange. According to the device, the cleaned special control rod tool is dried and reused by using simple equipment and a simple method, so that the special control rod tool can be reused, the waste of the special control rod tool is reduced, and the generation of radioactive solid wastes is also reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning and reuse of special tools for control rods of sodium-cooled fast reactors, and particularly relates to a cleaning and drying device for split control rod special tools of sodium-cooled fast reactors. BACKGROUND

[0002] The control rod assembly of a sodium-cooled demonstration fast reactor is of a split structure and is composed of a moving body and an outer sleeve, wherein the moving body and a tool sleeve are a combined structure, and the outer sleeve and a sleeve grabber are a combined structure. During refueling of the sodium-cooled demonstration fast reactor, special tools for control rods are needed to replace the control rod assembly, that is, special tools are needed to make the moving body and the outer sleeve enter and exit the reactor core. After the new moving body and the outer sleeve enter the reactor core, the spent moving body and the spent tool sleeve are combined with the respective special tools to enter the spent pool for storage, at which time the spent moving body and the spent tool sleeve need to be unlocked from the respective special tools and the special tools need to be transported out of the spent pool for preparation for the next refueling. The two kinds of special tools for control rods still have a certain radioactive contamination after being taken out of the spent pool and cannot be directly returned to the new fuel plant for use, which is an important problem of the sodium-cooled demonstration fast reactor. After the special tools for control rods are cleaned to remove the radioactivity, drying operation is needed, and there is a lack of drying devices for the special tools for control rods in the prior art. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a split control rod special tool cleaning and drying device for sodium-cooled fast reactors to solve the problem of a lack of drying devices for special tools for control rods after cleaning in the prior art.

[0004] The technical scheme of the utility model comprises the following:

[0005] The utility model provides a split control rod special tool cleaning and drying device for sodium-cooled fast reactors, which comprises a transfer container, a lower cylinder body and a sealing cover. The transfer container is a cylindrical body, a plurality of insertion slots are arranged in the transfer container, and the insertion slots are used for accommodating the special tools for control rods. The upper end of the transfer container is provided with the sealing cover, and the lower end of the transfer container is provided with the lower cylinder body. The lower end of the lower cylinder body is connected with an air inlet A through welding, the lower end of the lower cylinder body is connected with a liquid outlet through a flange, and the upper end of the sealing cover is connected with an exhaust hole through a flange.

[0006] In some embodiments, the upper end of the lower cylinder body is connected with a lower air bag seat through welding, and a lower air bag is arranged on the lower air bag seat. An upper air bag seat is arranged at the lower end position of the sealing cover, and an upper air bag is arranged on the upper air bag seat. The lower air bag and the upper air bag are respectively used for sealing the device.

[0007] In some embodiments, the bottom end of the transfer container is provided with an air inlet B, and the air inlet B corresponds to the air inlet A of the lower cylinder body in position.

[0008] In some embodiments, the lower cylinder and the transfer container are sealed by a lower air bag and a rubber wedge, and the sealing cover and the transfer container are sealed by an upper air bag and a rubber wedge.

[0009] In some embodiments, the lower end of the lower cylinder is connected to a support plate through a skirt plate, and the support plate is connected to the ground of the factory building through expansion screws.

[0010] In some embodiments, a lifting lug is arranged outside the upper section of the lower cylinder, and the lifting lug is used for lifting the lower cylinder; a lifting ring is arranged at the top end of the sealing cover, and the lifting ring is used for lifting the sealing cover.

[0011] In some embodiments, eight guide blocks are uniformly distributed at the top end of the lower cylinder, and the guide blocks are used for positioning the installation of the lower cylinder and the transfer container.

[0012] In some embodiments, the device is also provided with a rack for auxiliary installation of the device.

[0013] In some embodiments, the upper air bag seat and the sealing cover are reinforced by bolts.

[0014] The beneficial effects of the present application are as follows:

[0015] The utility model provides a kind of special tool cleaning and drying device of sodium-cooled fast reactor split type control rod, and the equipment and method of simple and convenient are used to realize the drying reuse of special tool of control rod after cleaning, so that special tool of control rod can be reused, reduce the waste of special tool of control rod, also reduce the generation of radioactive solid waste. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic view of the special tool cleaning and drying device of sodium-cooled fast reactor split type control rod proposed by the utility model;

[0017] Figure 2 It is a top view of the special tool cleaning and drying device of sodium-cooled fast reactor split type control rod proposed by the utility model;

[0018] Figure 3 It is a top view of the lower cylinder of the special tool cleaning and drying device of sodium-cooled fast reactor split type control rod proposed by the utility model;

[0019] Figure 4 It is a schematic view of the transfer container of the special tool cleaning and drying device of sodium-cooled fast reactor split type control rod proposed by the utility model;

[0020] Figure 5 It is a schematic view of the rack of the special tool cleaning and drying device of sodium-cooled fast reactor split type control rod proposed by the utility model;

[0021] BRIEF DESCRIPTION OF DRAWINGS: 1, lower cylinder; 2, sealing cover; 3, lifting lug; 4, upper air bag; 5, lower air bag; 6, rack; 7, liquid discharge port; 8, air vent; 9, rubber wedge; 10, air inlet A; 11, apron; 12, support plate; 13, lifting ring; 14, guide block; 15, transfer container. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in combination with the drawings and examples.

[0023] As Figures 1 to 5 shown, the utility model provides a sodium-cooled fast reactor split type control rod special tool cleaning and drying device, the device includes: transfer container 15, lower cylinder 1 and sealing cover 2, transfer container 15 is cylindrical cylinder, be equipped with several insertion slot in transfer container 15, and insertion slot is used to accommodate control rod special tool;Transfer container 15 upper end is equipped with sealing cover 2, and transfer container 15 lower end is equipped with lower cylinder 1;Lower cylinder 1 lower end is connected air inlet A 10 through welding, and the bottom of transfer container 15 is equipped with air inlet B, and air inlet B corresponds with the position of air inlet A 10 of lower cylinder 1.Progress port 7 is connected through flange at the lower end of lower cylinder 1, and air vent 8 is connected through flange at the upper end of sealing cover 2.

[0024] The device uses simple equipment and method to realize the drying reuse of the control rod special tool after cleaning, so that the control rod special tool can be reused, the waste of the control rod special tool is reduced, and the generation of radioactive solid waste is also reduced.

[0025] In some examples, the lower end of the lower cylinder 1 is connected to the lower air bag seat through welding, and the lower air bag 5 is arranged on the lower air bag seat;The upper end of the sealing cover 2 is provided with an upper air bag seat, and the upper air bag 4 is arranged on the upper air bag seat, and the lower air bag 5 and the upper air bag 4 are used for sealing the device respectively.The lower cylinder 1 and the transfer container 15 are sealed through the lower air bag 5 and the rubber wedge 9, and the sealing cover 2 and the transfer container 15 are sealed through the upper air bag 4 and the rubber wedge 9, and at the same time, the lower cylinder 1, the sealing cover 2 and the transfer container 15 do not need to be fixed, and the air bag is filled with gas by using an air compressor to prevent waste gas leakage.The upper air bag seat and the sealing cover 2 are reinforced by bolts, and the model of the bolt is M24.

[0026] In some examples, the lower end of the lower cylinder 1 is connected to the support plate 12 through the apron 11, and the support plate 12 is connected to the ground of the workshop through expansion screws.Eight guide blocks 14 are uniformly distributed on the top end of the lower cylinder 1, and the guide blocks 14 are used for positioning the installation of the lower cylinder 1 and the transfer container 15.The outer side of the upper segment position of the lower cylinder 1 is provided with a lifting lug 3, and the lifting lug 3 is used for hoisting the lower cylinder 1.The top end of the sealing cover 2 is provided with a lifting ring 13, and the lifting ring 13 is used for hoisting the sealing cover 2.

[0027] In some examples, the device is also provided with a rack 6, and the rack 6 is used for auxiliary installation of the device.

[0028] As Figures 1 to 5 shown, the utility model provides a kind of sodium-cooled fast reactor split type control rod special tool cleaning drying device, the use method of the device is as follows specifically:

[0029] First, the lower cylinder 1 of the device and rack 6 are fixedly installed in workshop, hoist transfer container 15 to the upper portion of lower cylinder 1, the air inlet B of transfer container 15 is aligned with the air inlet A10 of lower cylinder 1, and transfer container 15 is dropped on lower cylinder 1.

[0030] Second, seal cover 2 is hoisted to the upper portion of transfer container 15 by crane, and seal cover 2 is dropped on transfer container 15. Exhaust hole 8 is connected with workshop waste liquid system, air inlet A10 is connected with drying device, and air compressor is used to fill gasbag with gas from the same side.

[0031] Finally, when equipment connection is completed, the device is aerated and the inside of transfer container 15 is purged.

[0032] The above embodiment of the utility model is described in detail, and the utility model is not limited to the above examples. Within the knowledge range possessed by those skilled in the art, various changes can be made without departing from the purpose of the utility model.

Claims

1. A cleaning and drying device for special tools for split control rods of sodium-cooled fast reactors, characterized in that: The device includes: a transfer container, a lower cylinder and a sealing cover. The transfer container is a cylindrical cylinder with a plurality of slots provided therein for accommodating special tools for control rods. The sealing cover is provided at the upper end of the transfer container, and the lower end of the transfer container is provided at the lower end. The lower end of the lower cylinder is connected to the air inlet A by welding, the lower end of the lower cylinder is connected to the liquid discharge port by a flange, and the upper end of the sealing cover is connected to the exhaust hole by a flange.

2. The cleaning and drying device for special tools for split control rods of a sodium-cooled fast reactor according to claim 1, characterized in that: The upper end of the lower cylinder is connected to the lower airbag seat by welding, and the lower airbag seat is provided with a lower airbag; the lower end of the sealing cover is provided with an upper airbag seat, and the upper airbag seat is provided with an upper airbag. The lower airbag and the upper airbag are respectively used for sealing the device.

3. The cleaning and drying device for special tools for split control rods of a sodium-cooled fast reactor according to claim 2, characterized in that: An air inlet B is provided at the bottom of the transfer container, and the air inlet B corresponds to the position of the air inlet A of the lower cylinder.

4. The cleaning and drying device for special tools for split control rods of a sodium-cooled fast reactor according to claim 1, characterized in that: The lower cylinder and the transport container are sealed by a lower air bag and a rubber wedge, and the sealing cover and the transport container are sealed by an upper air bag and a rubber wedge.

5. The cleaning and drying device for special tools for split control rods of a sodium-cooled fast reactor according to claim 1, characterized in that: The lower end of the lower cylinder is connected to the support plate through a skirt plate, and the support plate is connected to the factory floor through expansion screws.

6. The cleaning and drying device for special tools for split control rods of a sodium-cooled fast reactor according to claim 1, characterized in that: A lifting lug is provided on the outer side of the upper section of the lower cylinder, and the lifting lug is used for lifting the lower cylinder; a lifting ring is provided on the top of the sealing cover, and the lifting ring is used for lifting the sealing cover.

7. The cleaning and drying device for special tools for split control rods of a sodium-cooled fast reactor according to claim 1, characterized in that: Eight guide blocks are evenly distributed on the top of the lower cylinder, and the guide blocks are used for positioning the installation of the lower cylinder and the transfer container.

8. The cleaning and drying device for special tools for split control rods of a sodium-cooled fast reactor according to claim 1, characterized in that: The device is also equipped with a stand, which is used for auxiliary installation of the device.

9. The cleaning and drying device for special tools for split control rods of a sodium-cooled fast reactor according to claim 2, characterized in that: The upper airbag seat and the sealing cover are reinforced by bolts.

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