CN112951473A - Irradiation device structure - Google Patents
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- CN112951473A CN112951473A CN202110106908.0A CN202110106908A CN112951473A CN 112951473 A CN112951473 A CN 112951473A CN 202110106908 A CN202110106908 A CN 202110106908A CN 112951473 A CN112951473 A CN 112951473A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K5/00—Irradiation devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
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- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention provides an irradiation device structure, which is used for acquiring material irradiation performance data and comprises: an irradiation tank assembly (2) comprising at least two material irradiation tanks (1) connected in series; the first cover plate (3) and the second cover plate (4) are connected with the two ends of the outer layer of the irradiation tank assembly (2) and seal the irradiation tank assembly (2); go up shielding stick (5) and shielding stick (6) down, go up shielding stick (5) butt first apron (3), shielding stick (6) can be dismantled down and connect second apron (4). According to the structure of the irradiation device provided by the invention, at least two material irradiation tanks are connected in series through the studs and are fixed on the lower shielding rod of the irradiation device in a seat mode through the bolt structure, so that the irradiation device can be conveniently disassembled through the disassembling milling machine. And, under seismic load, the seat formula structure can reduce effectively and rock and bending stress for irradiation unit sample jar can keep structural integrity in the irradiation period.
Description
Technical Field
The invention belongs to the technical field of reactor material irradiation, and particularly relates to an irradiation device structure.
Background
The radiation resistance of each component used in the reactor must be tested before the design is completed, and a material radiation device in the reactor needs to be specially designed in order to develop an in-reactor radiation test to obtain material radiation performance data and provide technical support for improving the design of the reactor component material.
Because the high-temperature radiation in the reactor for a long time requires a safe and reliable material irradiation device, for example, the fast neutron irradiation dose of the pressure vessel of a second-generation pressurized water reactor nuclear power plant is about 6 multiplied by 10 at the end of the service life of 60 years19n/cm3In-stack irradiation time for achieving a corresponding irradiation dose takes about 1.5 years, and therefore the material irradiation device is required to have high long-term in-stack use reliability.
Also, for example, under seismic loading, material irradiation devices need to effectively reduce sloshing and bending stresses over extended periods of irradiation to maintain their structural integrity. In addition, the material irradiation device also needs to be convenient to disassemble when being disassembled.
Disclosure of Invention
Technical problem to be solved
In view of the above, the present invention provides an irradiation device structure to ensure its structural integrity during operation, and at least partially solves the above problems.
(II) technical scheme
The invention provides an irradiation device structure, which is used for acquiring material irradiation performance data and comprises: an irradiation tank assembly 2 comprising at least two material irradiation tanks 1 connected in series; the first cover plate 3 and the second cover plate 4 are connected with the two ends of the outer layer of the irradiation tank assembly 2 and seal the irradiation tank assembly 2; go up shielding stick 5 and shielding stick 6 down, go up shielding stick 5 butt first apron 3, shielding stick 6 can dismantle the connection down second apron 4.
Further, the lower shielding rod 6 is connected with the second cover plate 4 by bolts.
Furthermore, a threaded hole is formed in the first end of the lower shielding rod 6, an external thread is formed in the second end of the second cover plate 4, and the external thread is screwed with the threaded hole.
Further, the upper shielding rod 5 and the first cover plate 3 are in shaft hole fit connection.
Furthermore, a blind hole is formed in the first end of the upper shielding rod 5, and an optical axis is formed in the second end of the first cover plate 3 and matched with the blind hole.
Further, the fit of the optical axis and the blind hole is clearance fit.
Furthermore, the blind hole is a cylindrical blind hole, and the optical axis is a cylindrical axis.
Further, the first end of the first cover plate 3 is connected to the irradiation tank assembly 2 by a second bolt 7, and the first end of the second cover plate 4 is connected to the irradiation tank assembly 2 by a second bolt 7.
Furthermore, a first step is formed between the first end and the second end of the first cover plate 3, and is used for limiting the first end of the upper shielding rod 5.
Further, a second step is formed between the first end and the second end of the second cover plate 4, and is used for limiting the second end of the lower shielding rod 6.
Further, an annular cutting groove is formed between the second step of the second cover plate 4 and the external thread.
Further, the concatenation of the at least two material irradiation tanks 1 comprises: a first end surface boss 8 and a first end surface inner hole 9 are respectively formed at two ends of the material irradiation tank 1; when two adjacent material irradiation tanks 1 are assembled, the first end surface boss 8 of one of the material irradiation tanks 1 is inserted into the first end surface hole 9 of the other material irradiation tank 1.
Further, two adjacent material irradiation tanks 1 are connected through a first bolt, so that a plurality of material irradiation tanks 1 are connected in series and assembled to form the irradiation tank assembly 2.
Further, the upper shield rod 5 and the lower shield rod 6 are both made of stainless steel material.
Further, the irradiation device structure further includes: the device comprises an upper operation head 10, a hexagonal tube 11 and a lower pin 12, wherein the hexagonal tube 11 is a supporting sleeve with a hexagonal cross section and is used for containing the irradiation tank assembly 1, a first cover plate 3, a second cover plate 4, an upper shielding rod 5 and a lower shielding rod 6; the upper operating head 10 and the lower pin 12 are respectively arranged at two ends of the hexagonal tube 11.
Furthermore, one end of the upper operating head 10 is provided with an upper transition joint, and one end of the lower pin 12 is provided with a lower transition joint; the second end of the upper shielding rod 5 is fixedly connected with the upper transition joint of the upper operating head 10, and the second end of the lower shielding rod 6 is fixedly connected with the lower transition joint of the lower pin 12.
Further, the second end of the upper shielding rod 5 is connected with the upper transition joint of the upper operating head 10 through threads and is fixed through punching and riveting.
Further, the second end of the lower shielding bar 6 is connected with the lower transition joint of the lower pin 12 through a pin and is fixed through punching and riveting.
Further, the material irradiation tank 1 comprises an inner sleeve 13 and an outer sleeve 14, wherein the outer sleeve 14 is used for accommodating the inner sleeve 13 and forms an annular gap with the inner sleeve 13.
Furthermore, two end faces of the outer sleeve 14 are respectively provided with a second end face boss and a second end face inner hole; when two adjacent material irradiation tanks 1 are assembled, the second end surface boss of one material irradiation tank 1 is inserted into the second end surface inner hole of the other material irradiation tank 1.
Further, the material of the inner sleeve 13 and the outer sleeve 14 is stainless steel.
Further, the inside of the inner sleeve 13 is loaded with a plurality of material test samples.
Further, the material test sample includes at least one of a tensile test sample, a stress relaxation test sample, a fatigue test sample, an impact test sample, and a radiation swell test sample.
Further, the opposite ends of the material test sample are provided with an upper end cover and a lower end cover, which are used for axially fixing the material test sample on the two end covers of the inner sleeve 13.
Further, a central circular tube 15 is provided in the center of the inner sleeve 13 for placing microscopic samples, including impact test samples or radiation swelling test samples.
(III) advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
(1) in the structure of the irradiation device provided by the invention, the arrangement of the material irradiation tanks and the fixing mode of the material irradiation tanks in the structure of the irradiation device are different from that of a conventional material irradiation container, the sample tanks of the irradiation device are connected in series by the studs, and are fixed on the lower shielding rod of the irradiation device in a seat mode by adopting a bolt structure, so that the irradiation device can be conveniently disassembled by a disassembly milling machine.
(2) Under seismic load, the seat-type structure can effectively reduce shaking and bending stress, so that the irradiation device sample tank can keep structural integrity in an irradiation period.
Drawings
Fig. 1 is a schematic view of a connection structure of an irradiation tank assembly and an upper shielding rod in an irradiation device structure according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a connection structure of an irradiation tank assembly and a lower shielding rod in the structure of an irradiation device according to an embodiment of the present invention.
FIG. 3 is a schematic structural diagram of an irradiation tank assembly according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of the structure of an irradiation device according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a material irradiation tank according to an embodiment of the present invention.
[ description of reference ]
1-a material irradiation tank; 2-irradiation tank assembly; 3-a first cover plate; 4-a second cover plate; 5-upper shielding bar; 6-lower shielding bar; 7-a second bolt; 8-a first end face boss; 9-a first end face inner hole; 10-an upper operating head; 11-a hexagonal tube; 12-lower pin; 13-an inner sleeve; 14-an outer sleeve; 15-central circular tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present disclosure, the terms "include" and "comprise," as well as derivatives thereof, mean inclusion without limitation; the term "or" is inclusive, meaning and/or.
The materials of the exemplary fast reactor internals are all materials which are designed and produced independently, the performance data after domestic material irradiation is avoided, and special material irradiation devices are required to be arranged for parts with larger irradiation doses. In view of the above, the present invention provides an irradiation device structure. The structure of the irradiation device provided by the invention is different from the conventional material irradiation container in the arrangement of the material irradiation tanks and the fixing mode of the material irradiation tanks in the irradiation device structure.
Fig. 1 is a schematic view of a connection structure of an irradiation tank assembly and an upper shielding rod in an irradiation device structure according to an embodiment of the present invention. Fig. 2 is a schematic diagram of a connection structure of an irradiation tank assembly and a lower shielding rod in the structure of an irradiation device according to an embodiment of the present invention.
With reference to fig. 1 and fig. 2, in order to obtain performance data of material irradiation, an irradiation apparatus structure provided in an embodiment of the present invention includes:
an irradiation tank assembly 2 comprising at least two material irradiation tanks 1 connected in series;
the first cover plate 3 and the second cover plate 4 are connected with the two ends of the outer layer of the irradiation tank assembly 2 and seal the irradiation tank assembly 2;
and the upper shielding rod 5 and the lower shielding rod 6 are used for fixing the irradiation tank assembly 2, wherein the upper shielding rod 5 abuts against the first cover plate 3, and the lower shielding rod 6 is detachably connected with the second cover plate 4.
In the embodiment of the invention, the lower shielding rod 6 is connected with the second cover plate 4 through a bolt.
Further, as shown in fig. 2, a first end of the lower shielding rod 6 is provided with a threaded hole, and a second end of the second cover plate 4 is provided with an external thread, and the external thread is screwed with the threaded hole. It should be noted that the first end of the lower shielding rod 6 is the end detachably connected to the second cover plate 4, and the second end of the lower shielding rod 6 is the other end opposite to the first end.
It can be seen that the external thread of the second end of the second cover plate 4 is in threaded connection with the threaded hole formed in the first end of the lower shielding rod 6, so that the lower end of the outer layer of the irradiation tank assembly 2 is fixed on the lower shielding rod 6.
In the embodiment of the invention, the upper shielding rod 5 and the first cover plate 3 are in shaft hole matching connection.
Further, as shown in fig. 1, a first end of the upper shielding rod 5 is provided with a blind hole, and a second end of the first cover plate 3 is provided with an optical axis, and the optical axis is matched with the blind hole.
The first end of the upper shield rod 5 is one end abutting against the first cover 3, and the second end of the upper shield rod 5 is the other end opposite to the first end.
Preferably, the blind hole is a cylindrical blind hole, and the optical axis is a cylindrical axis. It can be seen that the cylindrical shaft of the second end of the first cover plate 3 is inserted into the cylindrical blind hole formed at the first end of the upper shielding rod 5, so that the upper end of the outer layer of the irradiation tank assembly 2 is fixed on the upper shielding rod 5.
It should be noted that the cylindrical shaft of the first cover plate 3 is in clearance fit with the cylindrical blind hole of the upper shielding rod 5, and the clearance fit of the shaft hole can ensure that the radial shaking of the irradiation tank assembly 2 is limited under the working condition of seismic load. Because the radial shaking of the irradiation tank assembly 2 reaches the millimeter level under the earthquake load, the clearance design of the first cover plate 3 and the upper shielding rod 5 only needs to be considered for convenient assembly.
Continuing back to fig. 1, a first cover plate 3 and a second cover plate 4 are located at both ends of the outer layer of the irradiation canister assembly 2 for closing the irradiation canister assembly 2.
In the embodiment of the invention, the first end of the first cover plate 3 is connected with the irradiation tank assembly 2 through the second bolt 7, and the first end of the second cover plate 4 is connected with the irradiation tank assembly 2 through the second bolt 7.
As shown in fig. 1, a first step is further formed between the first end and the second end of the first cover plate 3, and is used for axially limiting the first end of the upper shielding rod 5.
As shown in fig. 2, a second step is disposed between the first end and the second end of the second cover plate 4 for axially limiting the second end of the lower shielding rod 6.
In addition, in order to facilitate the installation of the internal and external thread connection, a circular cutting groove is arranged between the second step of the second cover plate 4 and the external thread.
Through the embodiment of this disclosure, can see that, irradiation jar assembly 2's skin both ends are fixed in on shielding stick 5 and the shielding stick 6 down, and irradiation jar assembly 2 passes through second apron 4 and shielding stick 6 threaded connection down, realizes irradiation jar assembly 2's radial and circumference location.
In the embodiment of the invention, the irradiation tank assembly 2 comprises at least two material irradiation tanks 1 connected in series, so that the irradiation tank assembly 2 can be designed according to different irradiation samples. The material irradiation tank 1 plays a role in protection, and prevents a sample for an internal irradiation test from being damaged in the irradiation test process, so that the safe operation of the demonstration fast reactor is influenced.
FIG. 3 is a schematic structural diagram of an irradiation tank assembly according to an embodiment of the present invention.
The irradiation tank assembly 2 comprises at least two vertically positioned material irradiation tanks 1. As shown in fig. 3, in the irradiation tank assembly 2, a first end surface boss 8 and a first end surface inner hole 9 are respectively formed at two ends of each material irradiation tank 1, and when two adjacent material irradiation tanks 1 are assembled, the first end surface boss 8 of one material irradiation tank 1 is inserted into the first end surface inner hole 9 of the other material irradiation tank 1, so that the axial limiting of the plurality of material irradiation tanks 1 is realized.
In the embodiment of the invention, two adjacent material irradiation tanks 1 are connected through a first bolt, so that a plurality of material irradiation tanks 1 are connected in series and assembled to form an irradiation tank assembly 2.
It is understood that the irradiation tank assembly 2 includes at least two material irradiation tanks 1 connected in series, and the number of the material irradiation tanks 1 is not limited to the present invention.
In the fast neutron increment reactor, the neutron economy is not very severe,the high temperature performance and the radiation resistance of the material become main limiting factors. Stainless steel has good corrosion resistance and good mechanical properties under high temperature conditions, and therefore, stainless steel is widely used as other internals besides cladding in fast breeder reactors with its excellent high temperature properties and price advantages. More importantly, stainless steel has a large fast neutron absorption cross section (about 2.9X 10)-28m2) And thus may be used to reflect neutrons and absorb gamma rays.
In the embodiment of the invention, the upper shielding rod 5 and the lower shielding rod 6 are made of stainless steel materials and are used for reflecting neutrons and absorbing gamma rays.
Preferably, the material of the upper and lower shield rods 5, 6 is austenitic stainless steel.
In the embodiment of the present invention, in order to reduce the bending stress of the irradiation tank assembly 2, since the irradiation tank assembly 2 is an integral cylindrical structure, the second bolt 7 connecting the first cover plate 3 and the irradiation tank assembly 2, and the second bolt 7 connecting the second cover plate 4 and the irradiation tank assembly 2 are uniformly distributed along the circumferential direction of the irradiation tank assembly 2.
In order to further reduce the bending stress of the structure of the irradiation device, the irradiation tank assembly 2, the first cover plate 3, the second cover plate 4, the upper shielding rod 5 and the lower shielding rod 6 are all coaxially arranged.
It can be seen through the embodiments of the present disclosure that under seismic loads, the sitting-mounted irradiation device structure can effectively reduce the sloshing and bending stress, so that the irradiation tank assembly 2 in the irradiation device structure can maintain the structural integrity in the irradiation period.
Fig. 4 is a schematic diagram of the structure of an irradiation device according to an embodiment of the present invention.
As shown in fig. 4, in some embodiments, the irradiation device structure further comprises: an upper operating head 10, a hexagonal tube 11 and a lower pin 12. The hexagonal pipe 11 is a supporting sleeve with a hexagonal cross section and is used for containing the irradiation tank assembly 2, the first cover plate 3, the second cover plate 4, the upper shielding rod 5 and the lower shielding rod 6; the two ends of the hexagonal pipe 11 are respectively provided with an upper operating head 10 and a lower pin 12.
As can be seen from fig. 4, after the irradiation tank assembly 2 is stacked and fixed by at least two material irradiation tanks 1, the irradiation tank assembly 2, the first cover plate 3, the second cover plate 4, the upper shielding rod 5 and the lower shielding rod 6 are assembled inside the hexagonal tube 11, and then the upper operation head 10 and the lower pin 12 at two ends of the hexagonal tube 11 are assembled, a complete irradiation device structure of the present invention is formed.
In some embodiments, the upper operating head 10 is provided with an upper transition joint at one end and the lower foot 12 is provided with a lower transition joint at one end. The upper operating head 10 is used for performing a gripping operation on the fuel assembly. The upper transition joint has a hexagonal cross section for transition of the outer shape between the upper operating head 10 and the hexagonal tube 11. Likewise, the lower transition joint is used for transition of the outer shape of the hexagonal pipe 11 and the lower leg 12.
Further, the second end of the upper shielding rod 5 is fixedly connected with the upper transition joint of the upper operating head 10, and the second end of the lower shielding rod 6 is fixedly connected with the lower transition joint of the lower pin 12.
Preferably, the second end of the upper shielding rod 5 is fixed to the upper transition joint of the upper operating head 10 by screwing and punching-riveting, and the second end of the lower shielding rod 6 is fixed to the lower transition joint of the lower pin 12 by pinning and punching-riveting. Thus, the upper and lower shielding bars 5 and 6 located inside the hexagonal tube 11 are fixedly connected to the upper and lower manipulating heads 10 and 12, respectively.
Through the embodiments disclosed above, it can be seen that the structure of the irradiation device provided by the present invention has a structure or shape that is similar to other components of the core of the fast neutron value-added reactor, and specifically, the other components of the core may be, for example, stainless steel reflective layer components, so that the structure of the irradiation device provided by the present invention has versatility.
Fig. 5 is a schematic cross-sectional view of a material irradiation tank according to an embodiment of the present invention.
As shown in fig. 5, in some embodiments, the material irradiation canister 1 comprises an inner sleeve 13 and an outer sleeve 14, wherein the outer sleeve 14 is adapted to receive the inner sleeve 13 and form an annular gap with the inner sleeve 13.
Further, the axial length of the outer sleeve 14 is equal to or greater than the axial length of the inner sleeve 13. When the axial length of the outer sleeve 14 is equal to that of the inner sleeve 13, the end surfaces of the inner sleeve 13 and the outer sleeve 14 are flush; alternatively, when the axial length of the outer sleeve 14 is greater than the axial length of the inner sleeve 13, both ends of the inner sleeve 13 are located within both ends of the outer sleeve 14.
In some embodiments, the material irradiation canister 1 is in the form of a double-layer cylinder, wherein the outer sleeve 14 is made of a stronger material, thereby ensuring that the material irradiation canister 1 maintains structural integrity throughout the irradiation test.
According to the embodiment of the present invention, referring to fig. 5 and 3, the two end faces of the outer sleeve 14 are respectively provided with the second end face boss and the second end face inner hole. When two adjacent material irradiation tanks 1 are assembled, the second end surface boss of one material irradiation tank 1 is inserted into the second end surface inner hole of the other material irradiation tank 1, so that the two adjacent material irradiation tanks 1 are axially limited, and a plurality of material irradiation tanks 1 are connected in series and assembled to form the irradiation tank assembly 2.
Because stainless steel has good corrosion resistance and mechanical property under high temperature condition, the radiation sensitivity of austenitic stainless steel is low, generally 10 times21cm-2The irradiation effect is obvious after the neutron irradiation, so that the stainless steel material has excellent mechanical property, corrosion resistance and irradiation resistance, and can be used on an inner sleeve 13 and an outer sleeve 14 of an irradiation device structure as a peripheral container for carrying out an irradiation test.
In some embodiments, the material of both the inner sleeve 13 and the outer sleeve 14 is stainless steel.
Preferably, the material of both the inner sleeve 13 and the outer sleeve 14 is austenitic stainless steel.
Further, as shown in fig. 5, the inside of the inner sleeve 13 is loaded with liquid sodium and a plurality of material test samples, wherein the liquid sodium immerses the material test samples.
Liquid sodium filled in the inner sleeve 13 is used as a heat conducting medium to ensure that the temperature of the material test sample in the inner sleeve 13 is uniform. In particular, the liquid sodium makes use of its good thermal conductivity to provide substantially the same irradiation temperature for the test samples of material in the inner sleeve 13 of the same material irradiation tank 1.
It should be noted that the liquid sodium filled in the inner sleeve may be replaced by a sodium-potassium alloy, which also serves as a heat conducting medium, as long as the sodium-potassium alloy can ensure that the temperature of the irradiation sample in the irradiation tank 1 made of the same material is uniform.
The number of material test samples should meet the minimum number of samples required for standard testing. In an embodiment of the present invention, a material test sample includes: at least one of a tensile test sample, a stress relaxation test sample, a fatigue test sample, an impact test sample, and a radiation swelling test sample. .
Among the material test samples, according to the size of the test sample, a tensile test sample, a stress relaxation test sample and a fatigue test sample are cylindrical or tubular test samples and belong to general test samples; the impact test sample and the radiation swelling test sample are similar to a rectangle, have small volume and belong to microscopic samples.
According to an embodiment of the present invention, the test samples are generally loaded in such a manner as to be stacked in the axial direction of the inner sleeve 13. Specifically, the opposite ends of the material test sample are provided with an upper end cap and a lower end cap for axially fixing the material test sample on the end caps of the inner sleeve 13, thereby axially positioning the material test sample.
It should be noted that, because the material test sample may swell to a certain extent during the irradiation test, in order to prevent the material test sample from moving axially in the inner sleeve 13, the material test sample and the inner sleeve 13 are in contact with each other, if the contact force is large, the material test sample is difficult to be taken out of the material irradiation tank 1, which may cause the structure of the irradiation device to be inspected after irradiation, thereby causing operation difficulty.
According to an embodiment of the present invention, the axial length of the general test specimen is smaller than the axial length of the inner sleeve 13 to ensure that the general test specimen has a certain expansion gap during the irradiation test.
Preferably, the opposite ends of the material test sample are provided with end caps, such as an upper end cap and a lower end cap, wherein one end cap (such as the lower end cap) is spaced from the corresponding end cap of the inner sleeve to form a cavity, and the other end cap (such as the upper end cap) of the material test sample and the corresponding end cap of the inner sleeve can contact each other without spacing.
In some embodiments, a positioning spring may be disposed in a cavity formed by the end cap of the material test sample and the corresponding end cap of the inner sleeve 13, so as to limit axial movement of the material test sample in the inner sleeve 13, and to allow free irradiation growth of the material test sample during the irradiation test.
Preferably, the upper end cap and the lower end cap of the material test sample are both multi-well plates.
An inert gas is filled in an annular gap formed by the inner sleeve 13 and the outer sleeve 14 for controlling the irradiation temperature in the material irradiation tank 1. The inert gas may be, for example, helium or argon, and the irradiation temperature of the material test sample may be controlled by adjusting the size of the annular gap.
Preferably, the annular gap formed by the inner sleeve 13 and the outer sleeve 14 is filled with high purity helium gas, which has good heat conductivity.
In the embodiment of the present invention, liquid sodium is filled in the inner sleeve 13 to make the temperature distribution uniform, and helium is filled between the outer sleeve 14 and the inner sleeve 13. According to the operation power limit of the experimental fast reactor, the actually required irradiation temperature can be obtained by adjusting the number of material experimental samples and the width of the annular gap between the outer sleeve 14 and the inner sleeve 13.
In some embodiments, since the irradiation tank assembly 2 has at least two material irradiation tanks 1, the outer sleeves 14 of the at least two material irradiation tanks 1 have the same inner and outer diameter dimensions, and the inner sleeves 13 of the at least two material irradiation tanks 1 have different inner and outer diameter dimensions. That is, the annular gaps formed between the inner sleeve 13 and the outer sleeve 14 of the plurality of material irradiation tanks 1 are different in size, and since the inert gas is filled in the annular gaps, air gaps with different widths are formed between the outer sleeve 14 and the inner sleeve 13, and the irradiation temperature of the test sample in the material irradiation tank 1 is controlled by adjusting the size of the radial gap between the inner sleeve and the outer sleeve. In addition, a material irradiation tank 1 can be formed by sealing and plugging the inner sleeve 13.
According to the embodiment of the present invention, in the plurality of material irradiation tanks 1 connected in series, the sample irradiation temperature inside each material irradiation tank 1 may be different by adjusting the size of the annular gap, so that the present application may design different temperature fields inside each material irradiation tank 1 according to the experimental requirements.
In some embodiments, depending on the size of the material test specimen, the inner sleeve 13 is provided with a central circular tube 15 in the center of its interior for placing the microscopic specimen and also as a support for the overall pick and place operation of the material test specimen.
Among the above material test samples, the impact test sample and the radiation swelling test sample having a smaller volume may be used as microscopic samples. That is, the microscopic samples may include, for example, impact test samples and radiation swell test samples having a small volume.
In the embodiment of the invention, the microscopic sample comprises an impact test sample or a radiation swelling test sample, and the impact test sample or the radiation swelling test sample is placed in the central circular tube 15. Other material test samples which do not belong to the microscopic sample, such as a tensile test sample, a stress relaxation test sample and a fatigue test sample, are placed in the annular cavity between the inner sleeve 13 and the central circular tube 15 as a placement area of a general material test sample.
It can be seen that according to the embodiment of the present invention, a single test can satisfy the minimum number of samples required by the standard irradiation test, so as to maximally utilize the internal space of the inner sleeve 13 in the material irradiation tank 1, and through the structural design and the optimized sample arrangement scheme, the material test samples placed inside each material irradiation tank 1 cover various different types of test samples, such as the tensile test sample, the stress relaxation test sample, the fatigue test sample, the impact test sample, and the irradiation swelling test sample, and can satisfy the minimum number of samples.
In some embodiments, the wall of the central circular tube 15 is provided with a plurality of holes for allowing the liquid sodium to be immersed or discharged, so as to make the temperature distribution inside and outside the central circular tube 15 uniform.
It will be appreciated that the design of the irradiation equipment configuration should ensure that the material test sample reaches the desired irradiation temperature range. Preferably, the irradiation temperature of the sample is 450 ℃ to 600 ℃.
The most important monitoring parameters for irradiation tests are temperature and neutron fluence. For temperature measurement, in an irradiation tank without a measuring instrument, a non-online method is adopted for monitoring temperature and neutron fluence, and a common method for monitoring temperature is to utilize the temperature effect of materials, measure the reverse-thrust irradiation temperature after an irradiation test, for example, eutectic alloy is adopted, and judge the irradiation temperature according to the state and microstructure after irradiation; the neutron fluence is measured by a common detection piece, and various detection pieces which are placed in an irradiation device structure in advance need to be checked to obtain various test parameters after the irradiation test is finished.
In some embodiments, in order to monitor the temperature and neutron fluence parameters, a plurality of eutectic alloys for temperature monitoring are arranged in the central circular tube 15, and a plurality of detection pieces for neutron fluence detection are uniformly distributed between the outer sleeve 14 and the hexagonal tube 11, so that the temperature and neutron fluence of the material test sample in the invention have a function of off-line monitoring.
Further, the eutectic alloy used for temperature monitoring may include, for example, eutectic alloys having different melting points. And judging the temperature range of the material test sample according to the state of the irradiated eutectic alloy, and determining the irradiation temperature of the sample by combining a temperature field calculation program.
Further, the detection segments for neutron fluence detection may for example comprise alloy detection segments with different melting points, which may for example be a Mg-Ni alloy or an Al-Si alloy, the type of alloy detection segments not being limiting for the present invention. And after irradiation, checking, and judging the temperature range of steady-state irradiation according to the melting condition of the detection sheet, or determining the fast neutron fluence rate in the structure of the irradiation device according to the irradiated dose of the detection sheet.
According to an embodiment of the present invention, the irradiation device structure of the present invention may be disassembled for inspection after the irradiation test in the following manner:
the hexagonal tubes 11 positioned at the upper shielding rod 5 and the lower shielding rod 6 are respectively cut off by a disintegration milling machine, and the irradiation tank assembly 1 can be taken out. Further, the first cover plate 3 and the second cover plate 4 are transversely cut and removed by a cutting tool, and then are axially cut along the outer sleeve 14 of the material irradiation tank 1, and due to a certain annular gap reserved between the inner sleeve 13 and the outer sleeve 14, a cutting error can be reserved for the cutting tool, so that irradiation objects such as material test samples and the like in the inner sleeve 13 are prevented from being accidentally injured when the outer sleeve 14 is cut. After the outer sleeve 14 is cut, the inner sleeve 13 can fall off from the irradiation object, and at the moment, the irradiation object such as a material test sample with a complete structure can be taken out for post-irradiation inspection.
It should be noted that, because the irradiation test is a critical research verification test of the reactor material, the irradiation object in the present invention is not limited to the above-mentioned several material test samples, but is also suitable for other types of irradiation test objects which need to be placed and damaged in the irradiation test process, and the number of the irradiation test objects can be set according to the actual needs of the irradiation test because the number of the irradiation test objects meets the minimum sample number required by the standard test, and the present invention is not limited herein.
So far, the structure of an irradiation device of the present invention has been fully described. By this specific example, it is apparent that the irradiation facility structure of the present invention differs from a conventional material irradiation container in the arrangement of the material irradiation tanks 1 and the manner of fixing them in the irradiation facility structure, and the arrangement and the manner of fixing the material test samples inside the material irradiation tanks 1 of the present invention differ from a conventional material irradiation container.
In addition, the irradiation device structure has the function of non-online monitoring of the irradiation temperature and the neutron fluence of the sample, has universality and can meet the maximum loading requirement of a standard sample of a material irradiation test.
In summary, the material irradiation tank 1 of the present invention is serially connected by bolts and is fixed on the lower shielding rod 5 of the irradiation device in a seat-type manner, so that the irradiation device can be disassembled more conveniently, and the material irradiation tank 1 can be taken out. In addition, under earthquake load, the irradiation device structure installed in a seat mode provided by the invention can effectively reduce shaking and bending stress, so that the structural integrity of the material irradiation tank 1 in the irradiation device structure can be kept in an irradiation period.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", etc., mentioned in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present disclosure. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present disclosure. And the shapes, sizes and positional relationships of the components in the drawings do not reflect the actual sizes, proportions and actual positional relationships.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (25)
1. An irradiation device structure for acquiring irradiation performance data of a material, comprising:
an irradiation tank assembly (2) comprising at least two material irradiation tanks (1) connected in series;
the first cover plate (3) and the second cover plate (4) are connected with the two ends of the outer layer of the irradiation tank assembly (2) and seal the irradiation tank assembly (2);
go up shielding stick (5) and shielding stick (6) down, go up shielding stick (5) butt first apron (3), shielding stick (6) can be dismantled down and connect second apron (4).
2. An irradiation device structure according to claim 1, characterized in that the lower shielding bar (6) is bolted to the second cover plate (4).
3. An irradiation device structure as set forth in claim 2, characterized in that the first end of the lower shielding bar (6) is provided with a threaded hole, and the second end of the second cover plate (4) is provided with an external thread, and the external thread is screwed with the threaded hole.
4. The irradiation device structure according to claim 1, wherein the upper shielding bar (5) and the first cover plate (3) are in shaft hole fit connection.
5. An irradiation device structure as set forth in claim 4, characterized in that the first end of the upper shielding bar (5) is provided with a blind hole, and the second end of the first cover plate (3) is provided with an optical axis, which is matched with the blind hole.
6. An irradiation device structure as set forth in claim 5, wherein the fit of the optical axis with the blind hole is a clearance fit.
7. An irradiation device structure as set forth in claim 5 wherein said blind hole is a cylindrical blind hole and said optical axis is a cylindrical axis.
8. The irradiation device structure according to claim 5, wherein the first end of the first cover plate (3) is connected to the irradiation tank assembly (2) by a second bolt (7), and the first end of the second cover plate (4) is connected to the irradiation tank assembly (2) by a second bolt (7).
9. An irradiation device structure as set forth in claim 8, characterized in that a first step is opened between the first end and the second end of the first cover plate (3) for limiting the first end of the upper shielding rod (5).
10. An irradiation device structure as set forth in claim 9, characterized in that a second step is opened between the first end and the second end of the second cover plate (4) for limiting the second end of the lower shielding rod (6).
11. The irradiation device structure according to claim 10, wherein an annular cutting groove is arranged between the second step of the second cover plate (4) and the external thread.
12. The irradiation device structure according to claim 1, characterized in that the concatenation of the at least two material irradiation tanks (1) comprises:
a first end surface boss (8) and a first end surface inner hole (9) are respectively formed at two ends of the material irradiation tank (1);
when two adjacent material irradiation tanks (1) are assembled, the first end surface boss (8) of one material irradiation tank (1) is inserted into the first end surface inner hole (9) of the other material irradiation tank (1).
13. The irradiation device structure according to claim 1, wherein two adjacent material irradiation tanks (1) are connected by a first bolt, and a plurality of material irradiation tanks (1) are assembled in series to form the irradiation tank assembly (2).
14. An irradiation device structure according to claim 1, characterized in that the upper and lower shielding bars (5, 6) are both of stainless steel material.
15. The irradiation device structure of claim 1, further comprising: an upper operating head (10), a hexagonal tube (11) and a lower pin (12), wherein,
the hexagonal pipe (11) is a supporting sleeve with a hexagonal cross section and is used for containing the irradiation tank assembly (1), the first cover plate (3), the second cover plate (4), the upper shielding rod (5) and the lower shielding rod (6);
the two ends of the hexagonal tube (11) are respectively provided with the upper operating head (10) and the lower pin (12).
16. The irradiation device structure according to claim 15, wherein the upper operation head (10) is provided with an upper transition joint at one end, and the lower pin (12) is provided with a lower transition joint at one end;
the second end of the upper shielding rod (5) is fixedly connected with the upper transition joint of the upper operating head (10), and the second end of the lower shielding rod (6) is fixedly connected with the lower transition joint of the lower pin (12).
17. An irradiation device arrangement according to claim 16, characterized in that the second end of the upper shielding bar (5) is secured to the upper transition joint of the upper operating head (10) by screwing and clinching.
18. The irradiation device structure according to claim 18, wherein the second end of the lower shielding bar (6) is pinned and punch-riveted to the lower transition joint of the lower pin (12).
19. An irradiation device structure according to claim 1, wherein the material irradiation tank (1) comprises an inner sleeve (13) and an outer sleeve (14), wherein the outer sleeve (14) is used for accommodating the inner sleeve (13) and forms an annular gap with the inner sleeve (13).
20. The irradiation device structure of claim 19, wherein the outer sleeve (14) has second end surface bosses and second end surface inner holes formed on both end surfaces thereof, respectively;
when two adjacent material irradiation tanks (1) are assembled, the second end surface boss of one material irradiation tank (1) is inserted into the second end surface inner hole of the other material irradiation tank (1).
21. An irradiation device structure as set forth in claim 19, characterized in that the material of the inner sleeve (13) and the outer sleeve (14) is stainless steel.
22. An irradiation device structure according to claim 19, characterized in that the inside of the inner sleeve (13) is loaded with a plurality of material test samples.
23. The irradiation device structure of claim 22 wherein the material test sample comprises at least one of a tensile test sample, a stress relaxation test sample, a fatigue test sample, an impact test sample, and a radiation swell test sample.
24. An irradiation device arrangement according to claim 22, wherein the opposite ends of the test specimen of material are provided with an upper end cap and a lower end cap for axially securing the test specimen of material to the end caps of the inner sleeve (13).
25. An irradiation device structure according to claim 19, characterized in that the inner sleeve (13) is provided with a central circular tube (15) at its inner center for placing microscopic samples, including a shock test sample or a radiation swelling test sample.
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| CN202110106908.0A CN112951473A (en) | 2021-01-26 | 2021-01-26 | Irradiation device structure |
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| CN113406691A (en) * | 2021-06-23 | 2021-09-17 | 中国核动力研究设计院 | Neutron fluence and deformation measuring device in test reactor |
| CN113470862A (en) * | 2021-07-23 | 2021-10-01 | 中国核动力研究设计院 | Irradiation device based on component mesopores |
| CN113539544A (en) * | 2021-07-23 | 2021-10-22 | 中国核动力研究设计院 | Cladding tube irradiation bearing device and gas filling device and method used for same |
| CN114778323A (en) * | 2022-01-05 | 2022-07-22 | 哈尔滨工业大学 | Full-automatic detection device and method for one-dimensional stroke expansion irradiation relaxation |
| CN115762833A (en) * | 2022-11-17 | 2023-03-07 | 中国核动力研究设计院 | Lifting type irradiation device suitable for research reactor and irradiation temperature control method |
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