CN116543931A - Radiation shielding device for reactor - Google Patents

Abstract

The invention relates to a reactor radiation shielding device, which comprises a shielding base arranged on a shielding structure and a shielding door capable of opening and closing; the shielding base comprises a plurality of shielding units which are spliced with each other; a pipeline avoidance hole for the pipeline to pass through is formed on one shielding unit; a door hole for passing personnel and equipment is formed on one of the shielding units; or a plurality of shielding units together form a door opening for personnel and equipment to pass through; the shielding door is arranged on the shielding base corresponding to the door hole. The shielding base is built on the shielding structure, so that the shielding wall which needs to be repeatedly disassembled and assembled in the prior art can be replaced, the trafficability requirements of personnel and equipment are met by virtue of the openable shielding door, the work of repeatedly disassembling and assembling the shielding wall is omitted, and the influence on the radioactive radiation of the personnel is reduced. In addition, a plurality of shielding units are mutually spliced, so that the whole shielding base has the characteristic of modularization, is convenient to transport, construct and install on site, can effectively utilize the narrow space on site, and has good feasibility.

Description

Radiation shielding device for reactor

Technical Field

The invention relates to the technical field of nuclear industry design and manufacture, in particular to a reactor radiation shielding device.

Background

Neutrons and photons generated by sources such as the core during the operation of the nuclear power plant can adversely affect surrounding equipment and staff, and irradiation hot spots can be formed after long-time accumulation, so that the radiation hot spots are difficult to clean. The shielding structure is arranged at the position of the near stack or the near source from the angle of near source shielding, so that the influence of a source item on a peripheral area during power operation can be reduced, the dose rate is obviously reduced, and the irradiated dose of personnel and equipment is further reduced.

The existing shielding structures in the nuclear power plant are positioned between the plants of the reactor and serve as shielding walls for separating the space of the plants. The shielding structure is provided with a civil engineering opening. Typically, the civil opening provides access for personnel and equipment to pass through the remaining area after passage of the reactor attachment structure, such as a pipe. In the prior art, people and equipment pass through the wall, and meanwhile, radiation shielding functions at other times also need to be considered, a detachable shielding wall is usually arranged on a part (namely the residual area serving as a channel) of the civil engineering opening except for a pipeline, and the shielding wall needs to be integrally removed and then laid back after each pass of the people and the equipment.

However, the inventors found that the above prior art has the following drawbacks: the working position of the shielding wall is dismantled and built, radioactive radiation exists, workers are exposed to the working position for a long time, and even if special protection is adopted, radiation dose accumulation is large, so that the shielding wall is very unfavorable for personnel health. Furthermore, repeated removal of this portion has a negative impact on the radiation shielding function.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a reactor radiation shielding device.

The technical scheme adopted for solving the technical problems is as follows: a reactor radiation shield is provided that includes a shield base disposed on a shield structure, and a retractable shield door;

the shielding base comprises a plurality of shielding units which are spliced with each other;

a pipeline avoidance hole for the pipeline to pass through is formed on one shielding unit;

a door hole for passing personnel and equipment is formed in one of the shielding units; or a plurality of shielding units together form a door opening for passing personnel and equipment;

the shielding door is arranged on the shielding base corresponding to the door hole.

Preferably, the number of the shielding units is five, namely a first shielding unit, a second shielding unit, a third shielding unit, a fourth shielding unit and a fifth shielding unit;

the first shielding unit, the second shielding unit, the third shielding unit and the fourth shielding unit are sequentially connected in the same linear direction;

wherein the second shielding unit encloses the door hole; or the second shielding unit and the third shielding unit together enclose the door hole;

the third shielding unit is provided with the pipeline avoidance hole;

the fifth shielding unit extends along the linear direction of the first shielding unit, the second shielding unit, the third shielding unit and the fourth shielding unit which are sequentially connected, and is respectively connected with the bottoms of the first shielding unit, the second shielding unit, the third shielding unit and the fourth shielding unit.

Preferably, each shielding unit comprises a housing, and a plurality of shielding material layers filled in the housing, and each shielding material layer is divided into a plurality of pieces.

Preferably, a layering gap is formed between adjacent shielding material layers; a blocking gap is formed on each shielding material layer;

the layering gaps and the blocking gaps between the adjacent shielding units are staggered.

Preferably, the number of the shielding material layers is three.

Preferably, the shielding door comprises a door gap filling unit, an inner door leaf and an outer door leaf; the door gap filling unit is adapted to the wall of the door hole;

in a door closing state, the inner door leaf and the outer door leaf are respectively matched with the two opposite sides of the door gap filling unit, and the door gap is blocked together with the door gap filling unit so as to shield radiation;

in the door opening state, the inner door leaf and the outer door leaf are respectively opened along two opposite directions, and a channel for passing people and equipment is formed at the door hole.

Preferably, the door gap filling unit comprises a transverse frame and two vertical frames;

the two vertical frames are respectively arranged on two opposite inner side walls of the door hole; the transverse frames are arranged on the inner top wall of the door hole and are connected between the two vertical frames.

Preferably, the transverse frame and the vertical frame are hollow structures, and are filled with radiation shielding materials.

Preferably, the reactor radiation shield further comprises an outer door hinge; the outer door hinge comprises a first outer door rotating shaft, a connecting frame and a second outer door rotating shaft;

the first outer door rotating shaft is hinged to the outer wall surface of the shielding structure; the second outer door rotating shaft is hinged on the outer door leaf and is parallel to the first outer door rotating shaft; the connecting frame is connected between the first outer door rotating shaft and the second outer door rotating shaft.

Preferably, a bearing is arranged on the first outer door rotating shaft and/or the second outer door rotating shaft.

Preferably, the reactor radiation shielding device further comprises an inner door hinge, wherein the inner door hinge comprises a first hinge page, an inner door rotating shaft and a second hinge page;

the first hinge is connected to the inner wall surface of the shielding structure; the second hinge is connected to the inner door leaf, and the inner door rotating shaft is connected between the first hinge and the second hinge.

Preferably, a bearing is arranged on the inner door rotating shaft.

Preferably, corner transition areas are formed on two opposite surfaces of the door gap filling unit;

the inner door leaf is provided with a surface facing the door gap filling unit and a surface facing the door gap filling unit, and the outer door leaf is provided with an arc surface or an inclined surface matched with the corner transition area.

Preferably, the inner door leaf comprises a hollow inner door frame and a radiation shielding material filled in the inner door frame;

the outer door leaf includes a hollow outer door frame, and a radiation shielding material filled within the outer door frame.

Preferably, a plurality of inner door filling cavities for filling the radiation shielding material are formed inside the inner door frame, and are arranged along the length direction of the inner door frame; the boundary between adjacent inner door filling cavities is inclined edge, stepped or zigzag;

a plurality of outer door filling cavities which are arranged along the length direction of the outer door frame and are used for filling radiation shielding materials are formed in the outer door frame; the boundary between adjacent outer door filling cavities is inclined, stepped or zigzag.

Preferably, the reactor radiation shield further comprises an outer door locking assembly disposed between the shield base and the outer door leaf.

Preferably, the outer door locking assembly comprises a hand wheel, a connecting seat and a movable joint bolt;

the connecting seat is arranged on the outer door leaf; the movable joint bolt passes through the connecting seat, one end of the movable joint bolt is connected with the hand wheel, and the opposite end is connected with the shielding base.

Preferably, the reactor radiation shield further comprises an inner door locking assembly;

the inner door locking assembly is arranged on the inner door leaf, and in a door closing state, the inner door locking assembly is positioned in the door hole;

the inner door locking assembly locks the inner door leaf and the side wall of the door hole; and/or the inner door locking assembly locks the inner door leaf with the bottom wall of the door hole.

Preferably, the inner door locking assembly comprises a bottom plate assembly arranged on the inner door leaf and a locking rod arranged on the bottom plate assembly; the side wall and/or the bottom wall of the door hole are/is provided with a locking hole matched with one end of the locking rod.

Preferably, the locking rod is a screw;

the inner door locking assembly further comprises a locking assembly; the locking component comprises a hand locking rocker and a locking rotating shaft; the locking rotating shaft is arranged between the opposite end of the locking rod and the locking hand lever;

the hand locking rocker can rotate back and forth between a first position and a second position around the locking rotating shaft; in the first position, the hand locking rocker and the locking rod are coaxially arranged; in the second position, the hand locking rocker and the locking rod are arranged at an included angle.

Preferably, the bottom plate assembly comprises a bottom plate assembly body, a lock base, a lock shaft, and a rotary connector;

the bottom plate body is arranged on the inner door leaf; the lock base is arranged on the bottom plate body; the lock shaft penetrates through the lock base; the rotary connecting piece is provided with a through hole and a threaded hole, the lock shaft penetrates through the through hole in the rotary connecting piece and can rotate relative to the through hole along the circumferential direction, and the locking rod penetrates through and is in threaded fit with the threaded hole in the rotary connecting piece.

Preferably, a ventilation gap is formed between the pipe clearance hole and the outer surface of the passing pipe.

The implementation of the invention has the following beneficial effects: the shielding base is built on the shielding structure, so that the shielding wall which needs to be repeatedly disassembled and assembled in the prior art can be replaced, the trafficability requirements of personnel and equipment are met by virtue of the openable shielding door, the work of repeatedly disassembling and assembling the shielding wall is omitted, and the influence on the radioactive radiation of the personnel is reduced. In addition, a plurality of shielding units are mutually spliced, so that the whole shielding base has the characteristic of modularization, is convenient to transport, construct and install on site, can effectively utilize the narrow space on site, and has good feasibility.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a radiation shielding apparatus for a reactor according to an embodiment of the present invention;

FIG. 2 is a front view of a reactor radiation shield of an embodiment of the present invention;

FIG. 3 is a sectional view A1-A1 of FIG. 2;

FIG. 4 is a schematic view of shielding material layers of a reactor radiation shielding apparatus according to an embodiment of the present invention;

FIG. 5 is a sectional view A2-A2 of FIG. 2;

FIG. 6 is an enlarged schematic view of portion B of FIG. 5;

FIG. 7 is a schematic view of the structure at the view angle C of FIG. 5;

FIG. 8 is a top view of a reactor radiation shield in an open door condition in accordance with one embodiment of the present invention;

FIG. 9 is an enlarged schematic view of portion F of FIG. 8;

FIG. 10 is a sectional E-E view of FIG. 8;

FIG. 11 is a schematic view of the internal door lock assembly of an embodiment of the reactor radiation shield door of the present invention;

fig. 12 is a schematic view of the structure of an inner door lock assembly of another embodiment of a reactor radiation shield door of the present invention.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.

The terms "first," "second," "third," and the like are used merely for convenience in describing the present technology and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. "plurality" means two or more (including two) unless otherwise explicitly stated to be clear. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 to 12, a reactor radiation shielding apparatus according to an embodiment of the present invention includes a shielding base 1 built on a shielding structure 5, and a shielding door that can be opened and closed.

Specifically, the shield base 1 is built at a civil opening on the shield structure 5. The shielding base 1 is built at a civil opening on the shielding structure 5, and the edge of the shielding base 1 is embedded into the civil opening along the periphery of the civil opening. In this way, less space is occupied around the periphery of the shielding structure 5.

In addition, the installation of the shielding base 1 can be fully suitable for the existing structure of the shielding structure 5 in the existing nuclear power station, the existing structure of the shielding structure 5 is not required to be changed, the modification engineering quantity is minimized, and the manufacturing cost is low.

Referring to fig. 1 to 4, a shielding base 1 includes a plurality of shielding units spliced with each other.

One of the shielding units is formed with a pipe clearance hole 10 for the pipe to pass through.

A door hole for passing personnel and equipment is formed in one of the shielding units; or a plurality of shielding units together form a door opening for personnel and equipment to pass through.

A shielding door is provided on the shielding base 1 corresponding to the door hole. The shielding door plays a role in radiation shielding when being closed, and people and equipment can pass through smoothly when being opened.

Therefore, the shielding base 1 is built on the shielding structure 5, the shielding wall which needs to be repeatedly disassembled and assembled in the prior art can be replaced, and the passing requirements of personnel and equipment are met by virtue of the openable shielding door, so that the work of repeatedly disassembling and assembling the shielding wall is omitted, and the influence on the radioactive radiation of the personnel is reduced.

In addition, shielding base 1 includes a plurality of shielding units, and a plurality of shielding units splice each other, makes shielding base 1 wholly possess the modularization characteristic, and transportation, site operation and installation of being convenient for can effectively utilize the narrow space in scene, and the feasibility is better.

The reactor radiation shielding device can be applied to engineering improvement in operation and matched construction of a new unit, and has better adaptability.

For the shield base 1:

further, in this embodiment, for an actual environment in a certain nuclear power plant, a splicing and combining manner of each shielding unit specifically includes:

the number of shielding units is five, namely a first shielding unit 71, a second shielding unit 72, a third shielding unit 73, a fourth shielding unit 74 and a fifth shielding unit 75.

The first shielding unit 71, the second shielding unit 72, the third shielding unit 73, and the fourth shielding unit 74 are sequentially connected in the same straight line direction.

Specifically, the third shielding unit 73 has a quadrangular solid structure, and a circular pipe clearance hole 10 is formed in the middle thereof. The third shielding unit 73 includes a radial limiting plate and an axial limiting plate, and performs radial limiting support and axial limiting support on the pipe, respectively. In order to realize the installation and positioning of the third shielding unit 73, a connecting plate may be disposed at the top of the third shielding unit 73, and the connecting plate may be welded with an embedded plate on the shielding structure 5.

The second shielding unit 72 and the fourth shielding unit 74 are respectively located at opposite sides of the third shielding unit 73.

Wherein the second shielding unit 72 may individually enclose the door aperture; or the second shielding unit 72 encloses the door opening together with the third shielding unit 73.

Specifically, the second shielding unit 72 may be a rectangular frame individually enclosing rectangular door holes. Alternatively, the second shielding unit 72 may have a C-shape, and form a rectangular door opening together with one side wall of the adjacent third shielding unit 73, so that a portion of the duty (the duty caused by the thickness of the second shielding unit 72 itself) may be reduced, the area of the door opening formed may be increased, and the space for passing people and equipment may be increased.

The second shielding unit 72 may be an integrally formed bent plate, or may be formed by splicing and welding plates.

The first shielding unit 71 and the fourth shielding unit 74 have a rectangular parallelepiped structure.

The fifth shielding unit 75 extends along a straight line direction in which the first shielding unit 71, the second shielding unit 72, the third shielding unit 73, and the fourth shielding unit 74 are sequentially connected, and is connected to bottoms of the first shielding unit 71, the second shielding unit 72, the third shielding unit 73, and the fourth shielding unit 74, respectively.

As shown in fig. 1-2, a diagonal brace mount 750 may be provided between the fifth shielding element 75 and the shielding structure 5 for purposes of mounting and positioning the fifth shielding element 75. After the diagonal brace base 750 is mounted, the fifth shielding unit 75 may be mounted on the diagonal brace base 750 by bolting or the like.

The first shielding unit 71, the second shielding unit 72, the third shielding unit 73, the fourth shielding unit 74 and the fifth shielding unit 75 may be spliced by bolting, or may be spliced by other connection methods.

It will be appreciated that in other embodiments, the number of shielding units and the arrangement and splicing manner may be flexibly adjusted according to the actual field environment of different nuclear power plants.

Further, as shown in fig. 4, in this embodiment, each shielding unit includes a housing (not shown), and a plurality of shielding material layers 8 filled in the housing, and each shielding material layer 8 is divided into a plurality of pieces, so that the shielding material is divided into a plurality of small units in the housing, which is convenient for assembly and transportation in the field, and has good feasibility.

Further, as shown in fig. 4, a layered gap is formed between the adjacent shielding material layers 8; each shielding material layer 8 is formed with a block slit, that is, slits distributed in a crisscross manner are formed on one shielding unit.

The layering gaps and the blocking gaps between the adjacent shielding units are staggered. That is, between the adjacent shielding units, the layering gaps of the two are staggered, and the blocking gaps are also staggered, so that the ray shielding effect is improved. Because the ray is sharp, the staggered joint setting can effectively avoid the condition that the ray runs through the gap to appear, and radiation shielding effect is better.

Comprehensively considering construction difficulty, manufacturing cost, radiation shielding requirement and the like, experiments show that the radiation shielding requirement can be met under the condition of three shielding material layers 8. Therefore, in the present embodiment, the number of the shielding material layers 8 is three.

Further, in the present embodiment, a ventilation gap is formed between the pipe clearance hole 10 and the outer surface of the pipe passing therethrough. The ventilation gap may be 100mm, or other reasonable value.

The ventilation gap has the advantages of meeting ventilation requirements between plants, avoiding resonance caused by direct bonding between the hole wall of the pipeline clearance hole and the pipeline, affecting the stability of the structure, and being beneficial to meeting the design requirements of earthquake resistance.

For a shield door:

as shown in fig. 1 to 10, in the present embodiment, the shield door includes a door gap filling unit 2, an inner door leaf 3, an outer door leaf 4; the door gap filling unit 2 is adapted to the wall of the door hole.

The inner door leaf 3 is closer to the core than the outer door leaf 4; i.e. the inner door leaf 3 is closer to the source item than the outer door leaf 4.

Meanwhile, in the present embodiment, the thickness of the outer door leaf 4 is greater than that of the inner door leaf 3.

As shown in fig. 5 to 6, in the closed door state, the inner door leaf 3 and the outer door leaf 4 are fitted to opposite sides of the door gap filling unit 2, respectively, and the door gap is closed together with the door gap filling unit 2 to shield radiation.

As shown in fig. 8 to 9, in the door-opened state, the inner door leaf 3 and the outer door leaf 4 are opened in opposite directions, respectively, and a passage through which persons and equipment pass is formed at the door opening. As shown in fig. 6, the two opposite directions are D1 and D2. The inner door leaf 3 is opened in the direction D1 and the outer door leaf 4 is opened in the direction D2. Can ensure that when people carry equipment to pass through, the walking direction can be changed slightly to pass through the passage.

Thus, the outer door leaf 4 and the inner door leaf 3 together bear the requirements of radiation shielding and personnel and equipment passing, and the weight and the volume of the single door are reduced, so that the requirements of field installation and earthquake-resistant design can be met. Therefore, personnel and equipment can be effectively protected (the shielding effect is good), the problem of passing convenience is solved, and the requirements of on-site implementation and earthquake-resistant design are met.

Further, in the present embodiment, the door gap filling unit 2 includes a lateral frame 20, two vertical frames 21;

two vertical frames 21 are respectively fixed on two opposite inner side walls of the door hole; the transverse frame 20 is fixed to the inner top wall of the door opening and is connected between two vertical frames 21.

The transverse frames 20 and the vertical frames 21 are hollow structures, the outer shells of which are steel structures, and the interiors of which are filled with radiation shielding materials. Thus, the shell provides reliable structural strength, the whole weight is small due to the hollow inside, the on-site assembly and transportation are convenient, the anti-seismic design requirements are convenient to meet, and the like.

It will be appreciated that in other embodiments, the slot filler unit 2 may be an integrally formed steel structure with radiation shielding.

The transverse frame 20 and the two vertical frames 21 may be integrally formed, or may be separate members, and formed by field splicing.

Further, in the present embodiment, a double door shaft structure is provided for opening the outer door leaf 4; for the opening of the inner door leaf 3, a single door shaft structure is provided:

corresponding to the opening of the outer door leaf 4, the shielding door further comprises an outer door hinge; the outer door hinge comprises a first outer door rotating shaft 41, a connecting frame 40 and a second outer door rotating shaft 42, and forms a double door shaft structure.

The first outer door rotating shaft 41 is hinged on the outer wall surface of the shielding structure 5; the second outer door rotating shaft 42 is hinged on the outer door leaf 4 and is parallel to the first outer door rotating shaft 41; the connecting frame 40 is connected between the first outer door rotating shaft 41 and the second outer door rotating shaft 42, and realizes the rotation of the outer door leaf 4.

As shown in fig. 1, a civil engineering joint 43 is provided between the outer wall surface of the shielding structure 5 and the first outer door hinge 41. The civil engineering joint 43 provides a rooting point for the installation of the first outer door hinge 41. The civil engineering connecting piece 43 is welded on the embedded plate on the outer wall surface of the shielding structure 5, and the first outer door rotating shaft 41 is connected on the civil engineering connecting piece 43 through bolts. The civil engineering connecting piece 43 can be formed by splicing and welding plates, and can also be integrally formed.

The setting of biax structure can guarantee that outer door leaf 4 is along the space maximize that opens the door of D2 direction, is favorable to the blank area in the make full use of outer door leaf 4 outside, increases personnel and equipment accessible space. It will be appreciated that in other embodiments, the opening of the outer door leaf 4 may be of a single door spindle construction, depending on the actual space situation in the field.

Further, in the present embodiment, the bearings (not shown) are disposed on the first outer door rotating shaft 41 and/or the second outer door rotating shaft 42, which is beneficial to reducing the opening force of the outer door leaf 4, improving the opening stability thereof, and meeting the requirement of shock resistance. The bearing may be a thrust bearing.

According to actual situation demands, only the bearing can be arranged on the first outer door rotating shaft 41; bearings may be provided only on the second outer door hinge 42; bearings can be arranged on the first outer door rotating shaft 41 and the second outer door rotating shaft 42 at the same time, so that the opening force of the outer door leaf 4 is reduced to the greatest extent, the opening stability is improved, and the shock resistance requirement is met.

Corresponding to the opening of the inner door leaf 3, the shielding door further comprises an inner door hinge, and the inner door hinge comprises a first hinge page 31, an inner door rotating shaft 30 and a second hinge page 32.

The first hinge 31 is connected to the inner wall surface of the shielding structure 5; the second hinge 32 is connected to the inner door leaf 3, and the inner door rotating shaft 30 is connected between the first hinge 31 and the second hinge 32, so as to realize the rotation of the inner door leaf 3.

As described above, unlike the opening of the outer door leaf 4, only the single door shaft structure is considered for the opening of the inner door leaf 3, which is set according to the site-specific environment in the present embodiment. In other embodiments, the opening of the inner door leaf 3 may also be a double door shaft structure, depending on the actual space situation in the field. When the inner door leaf 3 is opened by adopting the double door shaft structure, the double door shaft structure on the outer door leaf 4 can be referred to in the embodiment.

Further, a bearing (not shown) may be disposed on the inner door pivot 30, so as to reduce the opening force of the inner door leaf 4, improve the opening stability thereof, and meet the requirement of shock resistance. The bearing may be a thrust bearing.

Further, in the present embodiment, as shown in fig. 8, corner transition regions 23 are formed on opposite surfaces of the door gap filler unit 2.

The surface of the inner door leaf 3 facing the door gap filling unit 2 and the surface of the outer door leaf 4 facing the door gap filling unit 2 are respectively provided with an arc surface or an inclined surface which is matched with the corner transition area 23. In this way, in the closed state, the outer door leaf 4 and the inner door leaf 3 can be closely attached to the door gap filling unit 2.

Correspondingly, the corner transition region 23 may be beveled or curved in shape. When the corner transition region 23 is a cambered surface, the surface of the inner door leaf 3 facing the door gap filling unit 2 and the surface of the outer door leaf 4 facing the door gap filling unit 2 are both formed with matched cambered surfaces; when the corner transition region 23 is inclined, the surface of the inner door leaf 3 facing the door gap filling unit 2 and the surface of the outer door leaf 4 facing the door gap filling unit 2 are both formed with adaptive inclined surfaces.

Through the cooperation of inclined plane or cambered surface, can realize outer door leaf 4 and interior door leaf 3 respectively with the inseparable laminating of door crack filling unit 2. More importantly, the arrangement of the arc-shaped fit or the bevel edge fit is to ensure that the shielding effect is ensured to the maximum extent while no ray penetrating seam is generated considering that rays are straight lines.

Further, in the present embodiment, the inner door leaf 3 includes a hollow inner door frame, and a radiation shielding material filled in the inner door frame. Accordingly, the outer door leaf 4 includes a hollow outer door frame, and a radiation shielding material filled in the outer door frame.

The radiation shielding material can be prepared by taking a thermosetting epoxy resin material as a matrix and adding boron element and a fireproof agent, can achieve the characteristics of high temperature resistance and flame retardance, and has the characteristics of shape-following manufacture by adopting liquid mixed material casting molding. The radiation shielding material is filled in the frame to ensure the strength of the whole structure, and is applicable to neutron ray or gamma ray shielding and high temperature or high humidity environment.

Different radiation shielding materials can be flexibly selected according to different shielding source items.

The inner door leaf 3 and the outer door leaf 4 both adopt hollow frame structures, are convenient for on-site assembly and transportation, and are favorable for meeting the requirements of serious accidents and earthquake working conditions.

Further, in the present embodiment, as shown in fig. 8 to 10, particularly, fig. 10, a plurality of inner door filling cavities 33 for filling a radiation shielding material are formed inside the inner door frame, which are arranged in the length direction thereof. The radiation shielding material may be poured as a liquid mix into the inner door filling chamber 33 (or the outer door filling chamber) to form an inner door leaf or an outer door leaf with radiation shielding function.

The boundary (or gap) between adjacent inner door filling chambers 33 has a shape of a hypotenuse, a stepped shape, or a zigzag shape, etc., preventing penetration of rays.

Similarly, a plurality of outer door filling cavities (not shown, refer to the inner door filling cavities 33) are formed inside the outer door frame, and are arranged along the length direction of the outer door frame and used for filling radiation shielding materials; the boundary (or gap) between adjacent outer door filling cavities is in the shape of a sloping side, a step, or a zigzag, etc. to prevent the penetration of rays.

Specifically, since the rays are straight, when the boundary (or slit) between the adjacent inner door filling cavities 33 is in a shape of a hypotenuse, a stepped shape, or a zigzag shape, etc., the rays cannot pass straight, and thus the leakage of the rays can be minimized.

As shown in fig. 10, in the case of the oblique sides, each of the inner door charge chambers 33 (or the outer door charge chambers) has a generally triangular prism shape, and thus the boundary between the adjacent inner door charge chambers 33 (or the outer door charge chambers) has an oblique side shape.

Further, in the present embodiment, for convenience of understanding, please refer to fig. 1, 2, 5 and 8, the reactor radiation shielding apparatus further includes an outer door locking assembly disposed between the shielding base 1 and the outer door leaf 4. In the door closing stage, the shielding base 1 and the outer door leaf 4 can be further locked through the outer door locking assembly, so that the sealing effect between the outer door leaf 4 and the shielding base 1 or the outer door leaf 4 and the door gap filling unit 2 is enhanced.

Further, in the present embodiment, the outer door locking assembly includes a hand wheel 6, a connection base 60, and a swing bolt (not shown). The connecting seat 60 is provided on the outer door leaf 4. The articulated bolts pass through the connecting seats 60 and are connected at one end to the handwheel 6 and at the opposite end to the shielding base 1.

Specifically, after the outer door leaf 4 is closed, the length of the swing bolt is adjusted by rotating the hand wheel 6 to press the connection seat 60 on the shielding base 1, so that the outer door leaf 4 and the shielding base 1 are locked. It will be appreciated that in other embodiments, other specific forms of outer door locking assembly may be employed.

Referring to fig. 6, 11 and 12, further, in this embodiment, the reactor radiation shield door further includes an inner door locking assembly.

The inner door locking assembly is arranged on the inner door leaf 3 and in the closed state is located in the door opening. That is, in the closed state, the inner door locking assembly is located on the door surface of the inner door leaf 3 facing the outer door leaf 4, which functions to further lock the inner door leaf 3 in the door hole of the shield base 1 after closing the inner door leaf 3.

The inner door locking component locks the inner door leaf 3 with the side wall of the door hole; and/or the inner door locking assembly locks the inner door leaf 3 with the bottom wall of the door opening.

Specifically, an inner door locking assembly may be provided at an upper position and a lower position on the inner door leaf 3, respectively, so as to lock the inner door leaf 3 with the side wall and the bottom wall of the door opening at the same time. Alternatively, in other embodiments, it is also possible to lock only the inner door leaf 3 to the side wall of the door opening or to the bottom wall of the door opening. Preferably, the inner door leaf 3 is simultaneously locked with the side wall and the bottom wall of the door opening, so that the sealing effect between the inner door leaf 3 and the door opening or between the door seam filling unit can be enhanced to the greatest extent.

For example, referring to fig. 11-12, in the embodiment shown in fig. 11, the inner door locking assembly can lock the inner door leaf 3 to the bottom wall of the door opening; in the embodiment shown in fig. 12, the inner door locking assembly can lock the inner door leaf 3 with the side wall of the door opening. One or more groups of inner door locking assemblies, one embodiment or two different embodiments, can be arranged according to the actual situation of the site.

Further, in the present embodiment, the inner door locking assembly includes a floor assembly 90 provided on the inner door leaf 3, and a locking lever 91 provided on the floor assembly 90. The side and/or bottom walls of the door aperture are provided with locking apertures (not shown) that mate with one end of the locking lever 91. One end of the locking rod 91 is inserted into the corresponding locking hole in the closing stage, so that the inner door leaf 3 can be locked with the side wall and/or the bottom wall of the door hole.

Specifically, when the inner door locking assembly locks only the inner door leaf 3 with the side wall of the door opening, a corresponding locking hole may be provided on the side wall of the door opening. Alternatively, when the inner door locking assembly locks only the inner door leaf 3 with the bottom wall of the door opening, a corresponding locking hole may be provided on the bottom wall of the door opening. Or, when the inner door locking assembly locks the inner door leaf 3 with the side wall and the bottom wall of the door hole, corresponding locking holes may be respectively provided on the side wall and the bottom wall of the door hole.

Further, in this embodiment, the locking lever 91 is a screw, and the locking lever 91 is inserted into the corresponding locking hole for fastening by rotating the locking lever 91 to drive the locking lever to stretch out and draw back.

Correspondingly, the inner door locking assembly further comprises a locking assembly. The locking assembly includes a lock lever 92 and a locking spindle 93. The locking shaft 93 is disposed between the opposite end of the locking lever 91 and the locking lever 92.

Further, the lock lever 92 is rotatable about the lock shaft 93 back and forth between a first position and a second position:

in the first position, the locking lever 92 and the locking lever 91 are coaxially arranged, and at this time, rotating the locking lever 92 can drive the locking lever 91 to rotate and stretch in the length direction thereof, so that the locking lever 91 is inserted into the corresponding locking hole along the length direction thereof. In the second position, the hand locking rocker 92 is arranged at an included angle with the locking lever 91, and as shown in fig. 10-11, the hand locking rocker 92 can be mutually perpendicular to the locking lever 91, so that the locking lever 91 is axially positioned, and the risk that the locking lever 91 is not tightly sealed by an inner door leaf due to axial displacement of the locking lever 91 after being inserted into a locking hole is avoided.

Further, the floor assembly 90 includes a floor body 901, a lock base 902, a lock shaft 903, and a swivel connector 904;

the floor body 901 is provided on the inner door leaf 3. The lock base 902 is disposed on the floor body 901. A lock shaft 903 is provided through the lock base 902. The rotation coupling member 904 is provided with a through hole (not shown) and a screw hole (not shown), and the lock shaft 903 passes through the through hole of the rotation coupling member 904 and is rotatable relative to the inner wall of the through hole in the circumferential direction, and the lock lever 91 passes through and is screw-fitted to the screw hole of the rotation coupling member 904.

Specifically, the rotating connector 904 can rotate around the lock shaft 903 along the circumferential direction, so as to drive the locking lever 91 to rotate around the lock shaft 903, so that the locking lever 91 has a certain position adjusting space to match the angle of the locking hole corresponding to the site, and a certain position error adjusting space is reserved for site construction, so that the locking lever 91 can be accurately inserted into the locking hole corresponding to the site, and the locking lever 91 and the locking hole are tightly matched.

According to the field situation, the shielding base 1 can also adopt a mode of filling radiation shielding materials in the hollow frame structure so as to reduce ray leakage to the greatest extent.

To meet the field transportation and installation requirements, the method is easy to implement on site, and the components (the shielding base 1, the door gap filling unit 2, the inner door leaf 3 and the outer door leaf 4) can be modularized, so that the length and the weight of a single component or a smaller unit are limited.

It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (22)

1. A reactor radiation shielding device, characterized by comprising a shielding base (1) arranged on a shielding structure (5) and a shielding door which can be opened and closed;

the shielding base (1) comprises a plurality of shielding units which are spliced with each other;

a pipeline avoidance hole (10) for the pipeline to pass through is formed on one shielding unit;

a door hole for passing personnel and equipment is formed in one of the shielding units; or a plurality of shielding units together form a door opening for passing personnel and equipment;

the shielding door is arranged on the shielding base (1) corresponding to the door hole.

2. The reactor radiation shielding device according to claim 1, wherein the number of shielding units is five, a first shielding unit (71), a second shielding unit (72), a third shielding unit (73), a fourth shielding unit (74), a fifth shielding unit (75), respectively;

the first shielding unit (71), the second shielding unit (72), the third shielding unit (73) and the fourth shielding unit (74) are connected in sequence in the same straight line direction;

wherein the second shielding unit (72) encloses the door aperture; or the second shielding unit (72) and the third shielding unit (73) together enclose the door hole;

the third shielding unit (73) is provided with the pipeline avoidance hole (10);

the fifth shielding unit (75) extends along a straight line direction in which the first shielding unit (71), the second shielding unit (72), the third shielding unit (73) and the fourth shielding unit (74) are sequentially connected, and is respectively connected with bottoms of the first shielding unit (71), the second shielding unit (72), the third shielding unit (73) and the fourth shielding unit (74).

3. The reactor radiation shielding device according to claim 1, wherein each shielding unit comprises a housing, a plurality of shielding material layers (8) filled in the housing, each shielding material layer (8) being arranged in a plurality of pieces.

4. A reactor radiation shielding according to claim 3, characterized in that a layered gap is formed between adjacent layers (8) of shielding material; each shielding material layer (8) is provided with a blocking gap;

the layering gaps and the blocking gaps between the adjacent shielding units are staggered.

5. A reactor radiation shielding according to claim 3, characterized in that the number of shielding material layers (8) is three.

6. The reactor radiation shielding device according to claim 1, characterized in that the shielding door comprises a door gap filling unit (2), an inner door leaf (3), an outer door leaf (4); the door gap filling unit (2) is adapted to the wall of the door hole;

in a door closing state, the inner door leaf (3) and the outer door leaf (4) are respectively matched with the opposite sides of the door gap filling unit (2), and the door gap filling unit (2) is used for blocking the door hole together to shield radiation;

in the door opening state, the inner door leaf (3) and the outer door leaf (4) are respectively opened along two opposite directions, and a passage for passing people and equipment is formed at the door hole.

7. The reactor radiation shielding device according to claim 6, characterized in that the door gap filling unit (2) comprises a transverse frame (20), two vertical frames (21);

the two vertical frames (21) are respectively arranged on two opposite inner side walls of the door hole; the transverse frame (20) is arranged on the inner top wall of the door hole and is connected between the two vertical frames (21).

8. The reactor radiation shielding device according to claim 7, characterized in that the transverse frames (20) and the vertical frames (21) are hollow structures, which are filled with radiation shielding material.

9. The reactor radiation shield of claim 7 further comprising an outer door hinge; the outer door hinge comprises a first outer door rotating shaft (41), a connecting frame (40) and a second outer door rotating shaft (42);

the first outer door rotating shaft (41) is hinged to the outer wall surface of the shielding structure (5); the second outer door rotating shaft (42) is hinged on the outer door leaf (4) and is parallel to the first outer door rotating shaft (41); the connecting frame (40) is connected between the first outer door rotating shaft (41) and the second outer door rotating shaft (42).

10. The reactor radiation shielding device according to claim 9, characterized in that bearings are provided on the first outer door spindle (41) and/or the second outer door spindle (42).

11. The reactor radiation shielding apparatus of claim 6, further comprising an inner door hinge comprising a first hinge leaf (31), an inner door spindle (30), a second hinge leaf (32);

the first hinge (31) is connected to the inner wall surface of the shielding structure (5); the second hinge (32) is connected to the inner door leaf (3), and the inner door rotating shaft (30) is connected between the first hinge (31) and the second hinge (32).

12. The reactor radiation shielding device according to claim 11, characterized in that the inner door spindle (30) is provided with bearings.

13. The reactor radiation shielding device according to claim 6, characterized in that the slot filling unit (2) has corner transition areas (23) formed on opposite surfaces thereof;

the inner door leaf (3) faces the surface of the door gap filling unit (2) and the outer door leaf (4) faces the surface of the door gap filling unit (2) and is provided with an arc surface or an inclined surface matched with the corner transition area (23).

14. The reactor radiation shielding apparatus according to claim 6, wherein the inner door leaf (3) comprises a hollow inner door frame, and a radiation shielding material filled in the inner door frame;

the outer door leaf (4) comprises a hollow outer door frame and a radiation shielding material filled in the outer door frame.

15. The reactor radiation shielding apparatus as defined in claim 14, wherein a plurality of inner door filling cavities (33) for filling the radiation shielding material are formed inside the inner door frame along a length direction thereof; the boundary between adjacent inner door filling cavities (33) is inclined, stepped or zigzag;

a plurality of outer door filling cavities which are arranged along the length direction of the outer door frame and are used for filling radiation shielding materials are formed in the outer door frame; the boundary between adjacent outer door filling cavities is inclined, stepped or zigzag.

16. The reactor radiation shielding device according to claim 6, further comprising an outer door locking assembly arranged between the shielding base (1) and the outer door leaf (4).

17. The reactor radiation shielding apparatus of claim 16, wherein the outer door locking assembly comprises a hand wheel (6), a connection seat (60), a swing bolt;

the connecting seat (60) is arranged on the outer door leaf (4); the articulated bolts pass through the connecting seat (60) and one end of the articulated bolts is connected with the hand wheel (6), and the other opposite end is connected with the shielding base (1).

18. The reactor radiation shield of claim 6, further comprising an inner door lock assembly;

the inner door locking assembly is arranged on the inner door leaf (3), and is positioned in the door hole in a door closing state;

the inner door locking assembly locks the inner door leaf (3) with the side wall of the door hole; and/or the inner door locking assembly locks the inner door leaf (3) with the bottom wall of the door opening.

19. The reactor radiation shielding apparatus according to claim 18, wherein the inner door locking assembly comprises a floor assembly provided on the inner door leaf (3), a locking lever provided on the floor assembly; the side wall and/or the bottom wall of the door hole are/is provided with a locking hole matched with one end of the locking rod.

20. The reactor radiation shield of claim 19 wherein said locking bar is a screw;

the inner door locking assembly further comprises a locking assembly; the locking component comprises a hand locking rocker and a locking rotating shaft; the locking rotating shaft is arranged between the opposite end of the locking rod and the locking hand lever;

the hand locking rocker can rotate back and forth between a first position and a second position around the locking rotating shaft; in the first position, the hand locking rocker and the locking rod are coaxially arranged; in the second position, the hand locking rocker and the locking rod are arranged at an included angle.

21. The reactor radiation shield of claim 19 wherein said floor assembly comprises a floor body, a lock base, a lock shaft, and a swivel connection;

the bottom plate body is arranged on the inner door leaf (3); the lock base is arranged on the bottom plate body; the lock shaft penetrates through the lock base; the rotary connecting piece is provided with a through hole and a threaded hole, the lock shaft penetrates through the through hole in the rotary connecting piece and can rotate relative to the through hole along the circumferential direction, and the locking rod penetrates through and is in threaded fit with the threaded hole in the rotary connecting piece.

22. The reactor radiation shielding device according to any one of claims 1-21, wherein a ventilation gap is formed between the conduit clearance hole (10) and the outer surface of the passing conduit.