CN112366021B - Equipment and method for realizing homogenization of reactor irradiation parameters - Google Patents

Abstract

The invention discloses a device and method for realizing uniformity of irradiation parameters of a reactor. The device comprises a rotary head, an irradiation sample box and a positioning assembly. The rotary head rotates by the reaction force provided by the flowing water in the reactor to drive the irradiation sample box. The rotating, irradiating sample box is used to fix the sample to be irradiated, and the positioning assembly ensures the stability of the whole device and ensures that the irradiated sample box does not eccentricity when rotating; the method disclosed in the present invention utilizes the above-mentioned equipment, with high-speed water flow in the reactor core As power, the irradiation sample box (or sample) is driven to rotate, and the reactor irradiation sample can be uniformly irradiated without external power. The device disclosed by the invention also has the characteristics of strong versatility, convenient installation and replacement, resource saving and strong stability.

Description

A device and method for realizing uniformity of reactor irradiation parameters

technical field

The invention belongs to the fields of reactor application and nuclear technology application, and in particular relates to a device and a method for realizing uniformity of irradiation parameters of a reactor.

Background technique

Under the background of the rapid development of nuclear power and nuclear technology in my country, there are more and more demands for various irradiation tasks in nuclear reactors, such as material irradiation assessment, material modification, neutron activation analysis, isotope production, etc. Whether various irradiation tasks can be successfully completed is directly related to the various irradiation parameters of the reactor, such as neutron flux, energy spectrum, gamma dose, heating rate and other irradiation parameters. The performance of the sample itself also has a great influence, such as the irradiation temperature, irradiation parameter setting and irradiation performance of the sample.

When the irradiated sample or material is irradiated in the reactor, it is usually placed in a specific position in the reactor channel. At this time, there will be large differences in the neutron and gamma received by the sample in different directions, and these differences will directly lead to the sample. Or the irradiation performance of different parts of the material is different, and the difference in irradiation caused by uneven irradiation is indistinguishable in practice, so it is impossible to perform corresponding processing on the sample according to the difference in received irradiation in subsequent processing. compensate.

At present, in order to reduce the influence of non-uniform reactor irradiation on materials or samples, external power devices and control systems are generally used to achieve uniformity of reactor irradiation parameters. However, since the irradiation channel is located in the reactor core, and the core mainly uses high-speed water flow for heat dissipation, the above methods will make it difficult to wire or pass through the pipeline in the core. Construction, these cables and pipes also have great potential safety hazards during use. Once damaged, they cannot be repaired and replaced. Moreover, under the irradiation of the strong radiation field of the reactor core, the power devices and cables installed in the reactor have a very short lifespan. short.

Therefore, there is a need for an automated device and method capable of uniformizing the irradiation parameters of the reactor, and the device and method can automatically realize the uniform irradiation of the sample in the reactor.

SUMMARY OF THE INVENTION

In view of this, the present invention provides an automatic device for homogenizing the irradiation parameters of the reactor, which uses the water flowing in the reactor as the power to drive the sample box holding the sample to be irradiated to rotate at a constant speed, so as to realize the uniformity of the irradiation parameters of the reactor. and provides a method for uniformizing irradiation parameters using the device.

In order to achieve this purpose, the present invention adopts the following technical solutions: a device for realizing the uniformity of the irradiation parameters of the reactor, the device comprising:

a rotating head, the rotating head is in the shape of a truncated cone, the side surface of which is provided with an arc-shaped groove, and the bottom of the truncated cone is provided with a protruding threaded connector;

Irradiation sample box, one end of the irradiation sample box is threadedly connected with the rotating head, and the threaded connection direction of the irradiation sample box and the rotating head is that when the rotating head drives the irradiation sample box to rotate, the connection between the two becomes tighter and tighter. direction;

The positioning assembly is screwed with the other end of the irradiation sample box, and the screw connection direction of the positioning assembly and the irradiation sample box is the direction in which the connection between the two becomes tighter when the irradiation sample box rotates.

Preferably, the irradiation sample box includes:

A sample box cover, the sample box cover is a concave cover body with internal threads, and the threaded connector at the bottom of the rotating head is embedded in the concave opening of the sample box cover, and is threadedly connected with it.

The sample box body is provided with blind holes at both ends of the sample box body, a plurality of non-penetrating sample holes are opened at the bottom of the blind hole at one end, and the inner wall of the blind hole at the other end is provided with threads; The sample box body is provided with a blind hole at one end of the sample hole.

Preferably, the positioning assembly includes:

a rotating shaft, one end of the rotating shaft is provided with a threaded connection head, and the other end is provided with a pin hole, the threaded connection head is embedded in the blind hole provided with the thread in the sample box body, and is threadedly connected with it;

Positioning sleeve, the positioning sleeve is a double-opening cylinder body, and a plurality of flow grooves are arranged on the outer surface of the cylinder. The flow grooves are parallel to the axis of the positioning sleeve and have the same length as the positioning sleeve; the rotating shaft is installed on the positioning sleeve through a ball bearing. Inside;

A positioning block, the positioning block is a cylindrical platform with a through hole in the center, the diameter of the through hole is the same as the diameter of the pin hole of the rotating shaft, the positioning block is embedded in the positioning sleeve, and the end of the rotating shaft with the pin hole is pressed tightly;

The height block, the center of the height block is provided with a through hole, the diameter of which is the same as the diameter of the pin hole of the rotating shaft; the height block is installed on one end of the positioning sleeve through the rotating bayonet II;

The positioning pin is inserted into the pin hole of the rotating shaft through the through hole of the pad block and the positioning block in sequence.

Preferably, the rotating head is provided with a plurality of rotating heads having different numbers and depths of grooves on its surface.

Preferably, the sample box body can be configured as a box body with different shapes and numbers of sample holes.

Preferably, the heightening blocks are provided as a plurality of heightening blocks with different heights.

A method for realizing uniformity of irradiation parameters of a reactor, the method comprising the following steps:

Step 1: install the sample to be irradiated in the irradiated sample box of the equipment for realizing the homogenization of the irradiation parameters of the reactor;

Step 2: Place the equipment with the sample to be irradiated in the irradiation tunnel in the reactor;

Step 3: The water flow in the core flows through the device, driving the rotating head to rotate at a constant speed, and the rotating head drives the irradiated sample box to rotate.

The beneficial effects of the present invention are as follows: the device for realizing the homogenization of the irradiation parameters of the reactor disclosed in the present invention is provided with a rotary head with an arc-shaped groove, and the rotary head uses the high-speed water flow in the reactor core as a power to automatically rotate and drive the irradiated sample The box (or sample) rotates to change the static irradiation in the reactor into dynamic irradiation, so as to realize the automatic homogenization of irradiation parameters in the reactor received by the sample, and avoid the difficulty of construction when using the driving device in the prior art. , prone to failure, high risk, short life and other problems; adjust the rotation speed of the irradiated sample box by setting multiple arc groove depths and different numbers of rotating heads, and set different shapes and different numbers of sample holes to achieve a variety of samples This equipment is versatile in irradiation experiments; the upper and lower ends of the irradiation sample box are connected with the rotating head and the rotating shaft by threads, which is convenient for installation and replacement; in use, the sample box, rotating head, positioning components, etc. can be repeated Use, according to the irradiation location and environment, it can be locally updated to adapt to the environmental requirements, which effectively saves resources; the device uses positioning sleeves, positioning blocks and positioning pins to coordinate positioning to ensure the stability of the rotation of the irradiation sample box, so as to achieve uniformity chemical reactor irradiation. The method disclosed by the invention utilizes the high-speed flowing water in the reactor as the driving force, realizes the automatic homogenization of irradiation parameters, and saves energy.

Description of drawings

Fig. 1 is the assembly diagram of the device for realizing the homogenization of the irradiation parameters of the reactor according to the present invention;

FIG. 2 is an assembly cross-sectional view of the device for realizing the homogenization of the irradiation parameters of the reactor according to the present invention;

Fig. 3 is the rotary head structure schematic diagram of the present invention;

Fig. 4 is the sample box cover structure schematic diagram of the present invention;

Fig. 5 is the sample box body structure schematic diagram of the present invention;

FIG. 6 is a schematic view of the structure of the rotating shaft of the present invention;

7 is a schematic structural diagram of the positioning sleeve of the present invention;

8 is a schematic structural diagram of a positioning block of the present invention;

9 is a schematic structural diagram of a pad height block of the present invention;

In the figure, 1. Rotary head 2. Irradiation sample box 3. Positioning assembly 21. Sample box cover 22. Sample box body 221. Sample hole 222. Bayonet I 31. Rotation shaft 32. Positioning sleeve 321. Bayonet II 33 . Ball bearing 34. Positioning block 35. Elevator block 36. Positioning pin.

Detailed ways

Those of ordinary skill in the art will appreciate that the embodiments described herein are intended to assist readers in understanding the principles of the present invention, and it should be understood that the scope of protection of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations without departing from the essence of the present invention according to the technical teaching disclosed in the present invention, and these modifications and combinations still fall within the protection scope of the present invention.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 and FIG. 2, a device for realizing uniformity of irradiation parameters of a reactor is characterized in that, the device includes: a rotating head 1, an irradiation sample box 2 and a positioning assembly 3, wherein:

As shown in Figure 3, the rotating head 1 is a frustum with an arc-shaped groove on the side surface, and a protruding threaded joint at the bottom; when the flowing water in the reactor flows through the rotating head 1, the arc-shaped groove of the rotating head 1 is generated tangential force, thereby driving the rotary head to start to rotate; the groove depth and number of the arc grooves on the surface of the rotary head 1 can be adjusted to easily adjust the rotation speed of the rotary head 1 .

The irradiation sample box 2 includes a sample box cover 21 and a sample box body 22 .

As shown in FIG. 4 , the sample box cover 21 is a concave cover body with internal threads, and the threaded connector at the bottom of the rotating head 1 is embedded in the concave opening of the sample box cover 21 and is threadedly connected to it;

As shown in Fig. 5, the sample box body 22 is provided with blind holes at both ends of the sample box body 22, a plurality of non-penetrating sample holes 221 are opened at the bottom of the blind hole at one end, and threads are arranged in the blind hole at the other end; The port I222 is nested in the blind hole at the end of the sample box body 22 where the sample hole 221 is opened.

The above-mentioned sample box body 22 can be designed as a plurality of box bodies with different shapes and numbers of sample holes 221, which are selected according to the shape and number of samples in the actual irradiation experiment.

The irradiation sample box 2 is detachably connected to the rotating head 1 through the sample box cover 21. According to the slotting direction of the arc groove on the rotating head, the thread direction of the threaded connection head is set to ensure that the rotating head 1 drives the irradiation sample box 2. When turning, the connection between the two becomes tighter and tighter, otherwise the device will not work properly.

The positioning assembly 3 includes a rotating shaft 31 , a positioning sleeve 32 , a ball bearing 33 , a positioning block 34 , a booster block 35 , and a positioning pin 36 .

As shown in FIG. 6 , one end of the rotating shaft 31 is provided with a threaded connector, and the other end surface is provided with a pin hole; as shown in FIG.

As shown in FIG. 7 , the positioning sleeve 32 is in the shape of a double-opening cylinder with a plurality of vertical flow grooves on the outer surface. The length of the flow grooves is the same as that of the positioning sleeve 32 ; the rotating shaft 31 is installed on the positioning sleeve through a ball bearing 33 . Inside 32, the positioning sleeve 32 is used to fix the entire equipment to ensure the stability of the entire equipment and the irradiated sample box 2 is not eccentric when rotating; the vertical flow groove on the outer surface of the positioning sleeve 32 can lead out the flowing water above to make the water flow smoothly.

As shown in FIG. 8 , the positioning block 34 is a cylindrical platform with a through hole at the central axis. The diameter of the through hole is the same as the diameter of the pin hole at the end of the rotating shaft 31 . The positioning block 34 is embedded in the positioning sleeve 32 and pushes against the rotating shaft. 31 has one end with a pin hole.

As shown in FIG. 9 , a through hole is provided at the central axis of the booster block 35, the diameter of which is the same as the diameter of the pin hole at the end of the rotating shaft 31; the booster block 35 is installed on one end of the positioning sleeve 32 through the bayonet II321; It is used to adjust the height of the irradiation sample box 2 to ensure that the sample to be irradiated placed in the sample box body 22 can be located within the irradiation range, and the height of the spacer block 35 can be adjusted according to actual needs.

The positioning pins 36 pass through the through holes of the spacer block 35 and the positioning block 34 in turn, and are embedded into the pin holes of the rotating shaft 31. The positioning pins can ensure the rotation accuracy of the rotating shaft 31, thereby ensuring that the irradiation sample box 2 does not rotate when it is rotated. Eccentric, so that the sample to be irradiated receives uniform irradiation.

The method of using the device for realizing the uniformity of the irradiation parameters of the reactor disclosed in the present invention: placing the sample to be irradiated in the sample hole 221 of the sample box 22, then assembling the device completely, and placing it in the reactor core hole , the water flow in the core drives the rotating head 1 to rotate at a constant speed, so as to achieve the purpose of uniform irradiation of the sample.

The device for realizing the homogenization of the irradiation parameters of the reactor disclosed by the invention uses the water flow in the reactor core as the power to drive the irradiation sample box (or the sample) to rotate, so as to realize the automatic homogenization of the irradiation parameters of the reactor, and avoid the use of the prior art. The driving device is difficult to construct, prone to failure, high risk, short life and other problems, and the device is versatile for different samples, easy to install and replace, and the rotating head and positioning components can be reused, which can effectively save resources ; Setting the positioning assembly ensures the stability of the rotation of the irradiation sample box, so as to achieve uniform reactor irradiation.

Claims (6)

1. An apparatus for achieving homogenization of reactor irradiation parameters, the apparatus comprising:

the rotary head (1) is in a frustum shape, an arc-shaped groove is formed in the side surface of the rotary head (1), and a convex threaded connector is arranged at the bottom of the frustum;

the irradiation sample box (2), one end of the irradiation sample box (2) is in threaded connection with the rotating head (1), and the threaded connection direction of the irradiation sample box (2) and the rotating head (1) is the direction that the irradiation sample box (2) is connected and rotates more and more tightly when the rotating head (1) drives the irradiation sample box (2) to rotate;

the positioning component (3) is in threaded connection with the other end of the irradiation sample box (2), and the threaded connection direction of the positioning component (3) and the irradiation sample box (2) is the direction in which the irradiation sample box (2) rotates and the connection direction of the positioning component and the irradiation sample box is tighter and tighter;

the positioning assembly (3) comprises: the sample box comprises a rotating shaft (31), wherein one end of the rotating shaft (31) is provided with a threaded connector, the other end of the rotating shaft is provided with a pin hole, and the threaded connector is embedded into a blind hole with threads in the sample box body (22) and is in threaded connection with the blind hole;

the positioning sleeve (32) is a double-opening cylinder, a plurality of water flowing grooves are formed in the outer surface of the cylinder, and the water flowing grooves are parallel to the axis of the positioning sleeve (32) and are the same as the positioning sleeve (32) in length; the rotating shaft (31) is arranged in the positioning sleeve (32) through a ball bearing (33);

the positioning block (34) is a cylindrical table with a through hole in the center, the diameter of the through hole is the same as that of a pin hole of the rotating shaft (31), and the positioning block (34) is embedded into the positioning sleeve (32) and tightly props against one end, provided with the pin hole, of the rotating shaft (31);

the center of the heightening block (35) is provided with a through hole, and the diameter of the through hole is the same as that of a pin hole of the rotating shaft (31); the heightening block (35) is arranged at one end of the positioning sleeve (32) through a bayonet II (321);

and the positioning pin (36), wherein the positioning pin (36) sequentially passes through the through holes of the heightening block (35) and the positioning block (34) and is embedded into the pin hole of the rotating shaft (31).

2. The apparatus for achieving homogenization of reactor irradiation parameters according to claim 1, wherein the irradiation sample box (2) comprises:

the sample box cover (21), the said sample box cover (21) is the concave body of the cover with internal screw thread, the screwed joint head at the bottom of the rotating head (1) is imbedded in the concave opening of the sample box cover (21), connect with its whorl;

the sample box body (22), both ends of the sample box body (22) are provided with blind holes, the bottom of the blind hole at one end is provided with a plurality of non-penetrating sample holes (221), and the inner wall of the blind hole at the other end is provided with threads; the sample box cover (21) is nested in a blind hole at one end of the sample box body (22) with the sample hole (221) through a bayonet I (222).

3. The apparatus for homogenizing reactor irradiation parameters according to claim 1, wherein the rotating head (1) is provided as a plurality of rotating heads with different numbers and depths of surface grooves.

4. The apparatus for homogenizing reactor irradiation parameters according to claim 2, wherein the sample box (22) is configured as a box with a plurality of sample holes (221) having different shapes and numbers.

5. The apparatus for homogenizing reactor irradiation parameters according to claim 1, characterized in that the block elevation (35) is provided as a plurality of blocks elevation blocks with different heights.

6. A method for achieving irradiation parameter homogenization using the apparatus of claim 1, the method comprising the steps of:

step 1: installing a sample to be irradiated in an irradiation sample box (2) of equipment for realizing the homogenization of reactor irradiation parameters;

step 2: placing the equipment provided with the sample to be irradiated in an irradiation pore channel in a reactor;

and 3, step 3: the water flow in the reactor core flows through the device, the rotating head (1) is driven to rotate at a constant speed, and the rotating head (1) drives the irradiation sample box (2) to rotate.

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