阅读说明：本技术 核反应堆探测器组件拆除用可升降暂存容器组件及方法 (Liftable temporary storage container assembly and method for dismantling nuclear reactor detector assembly ) 是由 熊思勇 张翼 瓮松峰 安彦波 余志伟 湛卉 杨其辉 李娜 钟元章 罗英 陈书华 于 2020-07-23 设计创作，主要内容包括：本发明公开了反应堆探测器组件拆除用可升降暂存容器组件及方法,所述可升降暂存容器组件包括伸缩机构、暂存容器和卷扬机构,所述伸缩机构的顶部固定,所述伸缩机构通过卷扬机构实现伸缩,所述暂存容器安装在伸缩机构的底部,所述暂存容器包括筒体,所述筒体的顶部和底部均为开口结构,所述筒体的底部开口处配合设置有开合门,所述暂存容器设置在高放存储容器的上方,在伸缩机构的作用下能够下降至高放存储容器内。通过本发明所述可升降暂存容器组件及方法能够实现对对拆除后的探测器组件进行暂存和转运。(The invention discloses a liftable temporary storage container assembly and a method for dismantling a reactor detector assembly, wherein the liftable temporary storage container assembly comprises a telescopic mechanism, a temporary storage container and a hoisting mechanism, the top of the telescopic mechanism is fixed, the telescopic mechanism realizes telescopic motion through the hoisting mechanism, the temporary storage container is installed at the bottom of the telescopic mechanism and comprises a barrel, the top and the bottom of the barrel are both of an open structure, an opening and closing door is arranged at an opening at the bottom of the barrel in a matched mode, the temporary storage container is arranged above the high-level storage container and can be lowered into the high-level storage container under the action of the telescopic mechanism. The liftable temporary storage container assembly and the method can realize temporary storage and transportation of the disassembled detector assembly.)

1. Nuclear reactor detector subassembly demolishs with liftable container subassembly of keeping in, its characterized in that, including telescopic machanism (3), keep in container (2) and hoist mechanism (5), the top of telescopic machanism (3) is fixed, telescopic machanism (3) realize flexible through hoist mechanism (5), keep in the bottom at telescopic machanism (3) is installed in container (2), keep in container (2) and include barrel (201), the top and the bottom of barrel (201) are open structure, the bottom opening part cooperation of barrel (201) is provided with door (203) that opens and shuts, keep in container (2) and set up in the top of high storage container, can descend to the high storage container in under the effect of telescopic machanism (3).

2. The liftable temporary storage container assembly for dismantling the nuclear reactor detector assembly as claimed in claim 1, wherein the opening and closing door (203) is connected with the bottom of the cylinder body (201) through a first torsion spring (202), a hasp (204) matched with the opening and closing door (203) is arranged on the cylinder body (201), the hasp (204) is installed on the cylinder body (201) through a second torsion spring (205), a protrusion is arranged on the opening and closing door (203), a clamping groove matched with the protrusion is arranged on the hasp (204), and in a natural state, the hasp (203) is in a vertical position and the opening and closing door (203) is in a horizontal position; the protruding part of the opening and closing door (203) is clamped in the clamping groove at the lower part of the buckle (204), and when the temporary storage container (2) descends into the high-level storage container, the handle of the buckle (204) protrudes out of the high-level storage container.

3. The nuclear reactor detector assembly is demolishd and is used liftable temporary storage container assembly of claim 1, further includes shielding barrel (1) of setting in temporary storage container (2) top, temporary storage container (2) submergence is below the surface of water, the bottom of shielding barrel (1) contacts with the surface of water or submerges below the surface of water, temporary storage container (2) can imbed in shielding barrel (1), the top and the bottom of shielding barrel (1) are open structure.

4. A liftable buffer vessel assembly for nuclear reactor detector assembly removal according to claim 3, characterized in that the shielding cylinder (1) is made of lead plate and the buffer vessel (2) is made of tungsten alloy.

5. A liftable escrow container assembly for nuclear reactor detector assembly removal according to claim 1, wherein the telescoping mechanism (3) comprises a plurality of first telescoping rods (301), 2 second telescoping rods (302), a support frame (303), and a round bar (305);

the temporary storage container comprises a plurality of first telescopic rods (301) which form an upper X-shaped telescopic assembly, 2 second telescopic rods (302) which form a lower X-shaped telescopic assembly, the top of each second telescopic rod (302) is connected with the corresponding first telescopic rod (301), a support frame (303) is arranged at the bottom of each second telescopic rod (302), and the temporary storage container (2) is arranged on the support frame (303); the middle parts of the 2 second telescopic rods (302) are connected through a round rod (305), and the round rod (305) is connected with a hoisting mechanism (5) through a steel wire rope.

6. A liftable temporary storage container assembly for dismantling a nuclear reactor detector assembly according to claim 5, wherein a counterweight (304) is arranged on the support frame (303), and a groove matched with the steel wire rope is arranged on the outer wall of the round rod (305).

7. The liftable temporary storage container assembly for removing the nuclear reactor detector assembly of claim 5, further comprising a guide rail assembly (4), wherein one end of the upper X-shaped telescopic assembly is fixed, and the other end of the upper X-shaped telescopic assembly is arranged on the guide rail assembly (4).

8. A liftable escrow container assembly for nuclear reactor detector assembly removal according to claim 7, wherein the rail assembly (4) comprises a slider (401), a rail (402) and a base (403);

the sliding block (401) is installed in a guide rail (402), the sliding block (401) is connected with a telescopic mechanism, the guide rail (402) is installed on a base (403), and mechanical stop blocks are arranged at two ends of the base (403).

9. A liftable escrow container assembly for nuclear reactor detector assembly removal according to claim 1, wherein the hoisting mechanism (5) comprises a reel (501), a shaft (502), a bearing block (503) and a handle (504);

the winding drum (501) is installed on a bearing seat (503) through a rotating shaft (502), and two steel wire rope reels are arranged on the outer wall of the winding drum (501); one end of the rotating shaft (502) is connected with a speed reducer and a winding motor, and the other end is provided with a handle (504).

10. A method of storing and operating a nuclear reactor detector assembly for removal of a scratchpad container assembly as recited in claim 2, comprising the steps of:

s1, the telescopic mechanism (3) is lifted through the winding mechanism (5), the telescopic mechanism (3) contracts upwards, the temporary storage container (2) receives the detached detector assembly, and at the moment, the protruding part of the opening and closing door (203) is clamped in the clamping groove of the buckle (204), and the opening and closing door (203) is always in a closed state;

s2, after the temporary storage container (2) collects the detector assembly, the telescopic mechanism (3) is extended downwards through the winding mechanism (5), at the moment, the temporary storage container (2) descends into the high-level storage container, at the moment, the wall of the high-level storage container touches the handle of the buckle (204), the buckle (204) rotates anticlockwise around the rotating shaft at the second torsion spring (205) after being subjected to upward acting force, the opening and closing door (203) is separated from the clamping groove of the buckle (204), the opening and closing door (203) is in an opening state under the action of gravity of the detector assembly, and the detector assembly falls into the high-level storage container to finish transferring;

s3, after the transfer of the detector assembly is completed, the opening and closing door (203) is reset under the action of the first torsion spring (202); then the temporary storage container (2) leaves the high-level storage container, the buckle (204) resets under the action of the second torsion spring (205), and the opening and closing door (203) restores to a closed state.

Technical Field

The invention relates to the technical field of pressurized water reactor nuclear power plant refueling and maintenance, in particular to a liftable temporary storage container assembly and a method for disassembling a nuclear reactor detector assembly.

Background

Detectors for core measurement systems in second-generation and second-generation pressurized water reactor nuclear power stations are divided into thermocouples for measuring temperature and neutron flux detectors for measuring flux. The thermocouple is led in from the top cover of the pressure vessel, guided by the thermocouple column assembly and positioned at a specified measuring point position, and the lower end of the thermocouple is positioned at the core outlet of the upper core plate. The flux detector is led in from the bottom end socket of the pressure vessel, and is guided by the instrument sleeve and the finger sleeve when needed to enter the guide pipe in the fuel assembly at a specified measuring point. The design life of both detector assemblies is the plant's full life, not considering replacement except for special cases. Power plants at home and abroad have been replaced precedently, and an underwater shearing tool is adopted to replace the damaged flux detector individually.

The detector for the third-generation nuclear power station reactor core measuring system is changed into a detector which is completely introduced from a pressure vessel top cover, and the detector assembly is guided to a specified measuring point position through a guide structure arranged on an in-reactor component until the detector assembly is inserted into a guide pipe in the middle of a fuel assembly for a certain depth. The detector assembly inserted into the core has a housing of type 304 stainless steel with neutron detection elements and thermocouples inside. The probe assembly is typically installed after the reactor is installed in the fuel assembly and inserted into the fuel assembly during operation until the useful life of the probe assembly is reached. Due to burnup and irradiation effects, the life of the detector generally does not reach 60 years in a nuclear power plant, and therefore, after the detector assembly reaches a certain service life, the detector assembly needs to be removed to the life during refueling. The disassembled detector has high radioactivity and needs to be transferred to an underwater high-level storage container for storage through a temporary storage container.

At present, the storage technology research on the dismantled detector assembly is less, and a set of storage container matched with the dismantling equipment needs to be designed for temporarily storing and transferring the dismantled detector assembly.

Disclosure of Invention

The invention aims to provide a liftable temporary storage container assembly and a method for dismantling a nuclear reactor detector assembly, which can realize temporary storage and transportation of the dismantled detector assembly.

The invention is realized by the following technical scheme:

nuclear reactor detector subassembly is demolishd with liftable container subassembly of keeping in, including telescopic machanism, the container of keeping in and hoisting mechanism, telescopic machanism's top is fixed, telescopic machanism realizes flexiblely through hoisting mechanism, the container of keeping in is installed in telescopic machanism's bottom, the container of keeping in includes the barrel, the top and the bottom of barrel are open structure, the bottom opening part cooperation of barrel is provided with the door that opens and shuts, the container of keeping in sets up in the top of high-level storage container, can descend to in the high-level storage container under telescopic machanism's effect.

The temporary storage container is lifted and lowered through the telescopic mechanism, when the temporary storage container is lifted to the highest position, the temporary storage container is used for receiving the disassembled detector assembly, temporary storage of the detector assembly is achieved, when the temporary storage container is lowered to the lowest position, the opening and closing door is opened, the detector assembly is transferred into the high-storage container, and therefore temporary storage and transfer of the disassembled detector assembly are achieved.

Furthermore, the opening and closing door is connected with the bottom of the barrel through a first torsion spring, a hasp matched with the opening and closing door is arranged on the barrel, the hasp is installed on the barrel through a second torsion spring, a protrusion is arranged on the opening and closing door, a clamping groove matched with the protrusion is arranged on the hasp, and in a natural state, the hasp is located at a vertical position, and the opening and closing door is located at a horizontal position; the protruding part of the opening and closing door is clamped in the clamping groove at the lower part of the hasp, and when the temporary storage container descends into the high-level storage container, the handle of the hasp protrudes out of the high-level storage container.

The structure can realize the automatic opening and closing of the opening and closing door.

Further, still including setting up the shielding barrel in the container top of keeping in, the container submergence of keeping in is below the surface of water, the bottom and the surface of water contact of shielding barrel or submergence are below the surface of water, it can imbed in the shielding barrel to keep in the container, the top and the bottom of shielding barrel are open structure.

The invention can carry out full-stroke double radiation shielding on the detector assembly; when the detector assembly is received, the temporary storage container cylinder and the shielding cylinder provide double radiation shielding; during the detector subassembly of transportation, the container barrel of keeping in and aqueous medium provide dual radiation shielding.

Furthermore, the shielding cylinder is made of a lead plate, and the temporary storage container is made of tungsten alloy.

The lead plate and the tungsten alloy both have shielding effects.

Furthermore, the telescopic mechanism comprises a plurality of first telescopic rods, 2 second telescopic rods, a support frame and a round rod;

the temporary storage container comprises a plurality of first telescopic rods, a plurality of second telescopic rods, a support frame and a temporary storage container, wherein the plurality of first telescopic rods form an upper X-shaped telescopic assembly, the 2 second telescopic rods form a lower X-shaped telescopic assembly, the top of each second telescopic rod is connected with the corresponding first telescopic rod, the support frame is arranged at the bottom of the corresponding second telescopic rod, and the temporary storage container is installed on the support frame; the middle parts of the 2 second telescopic rods are connected through a round rod, and the round rod is connected with a hoisting mechanism through a steel wire rope.

The telescopic mechanism of the structure consists of rigid telescopic rods, is arranged on two sides of the temporary storage container to form fixed lifting tracks, realizes vertical lifting of the temporary storage container, and has high guiding and positioning precision; the telescopic link 2 that telescopic machanism load-carrying position is thickened, and telescopic link 1 only plays the position restraint effect, moves more stably.

Furthermore, a balancing weight is arranged on the supporting frame, and a groove matched with the steel wire rope is arranged on the outer wall of the round rod.

Furthermore, the device also comprises a guide rail assembly, wherein one end of the upper X-shaped telescopic assembly is fixed, and the other end of the upper X-shaped telescopic assembly is arranged on the guide rail assembly.

Further, the guide rail assembly comprises a sliding block, a guide rail and a base;

the slider is installed in the guide rail, the slider is connected with telescopic machanism, the guide rail is installed on the base, the both ends of base all are provided with mechanical dog.

Furthermore, the winding mechanism comprises a winding drum, a rotating shaft, a bearing seat and a handle;

the winding drum is installed on the bearing seat through a rotating shaft, and two steel wire rope reels are arranged on the outer wall of the winding drum; one end of the rotating shaft is connected with a speed reducer and a winding motor, and the other end of the rotating shaft is provided with a handle.

The storage and operation method of the liftable temporary storage container assembly for dismantling the nuclear reactor detector assembly comprises the following steps:

s1, the telescopic mechanism is lifted through the winding mechanism, the telescopic mechanism contracts upwards, the temporary storage container receives the detached detector assembly, and at the moment, the opening and closing door is always in a closed state because the protruding part of the opening and closing door is clamped in the hasp clamping groove;

s2, after the temporary storage container collects the detector assembly, the telescopic mechanism extends downwards through the winding mechanism, at the moment, the temporary storage container descends into the high-level storage container, at the moment, the wall of the high-level storage container touches the handle of the buckle, the buckle rotates anticlockwise around the rotating shaft at the second torsion spring after receiving upward acting force, the opening and closing door is separated from the clamping groove of the buckle, the opening and closing door is in an opening state under the action of the gravity of the detector assembly, and the detector assembly falls into the high-level storage container to finish transferring;

s3, after the detector assembly is completely transferred, the opening and closing door is reset under the action of the first torsion spring; then the temporary storage container leaves the high-level storage container, the hasp resets under the effect of second torsional spring, and the door that opens and shuts resumes the closed condition.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the temporary storage container is lifted and lowered through the telescopic mechanism, when the temporary storage container is lifted to the highest position, the temporary storage container is used for receiving the disassembled detector assembly, temporary storage of the detector assembly is achieved, when the temporary storage container is lowered to the lowest position, the opening and closing door is opened, the detector assembly is transferred into the high-storage container, and therefore temporary storage and transfer of the disassembled detector assembly are achieved.

2. The invention can carry out full-stroke double radiation shielding on the detector assembly; when the detector assembly is received, the temporary storage container cylinder and the shielding cylinder provide double radiation shielding; during the detector subassembly of transportation, the container barrel of keeping in and aqueous medium provide dual radiation shielding.

3. The telescopic mechanism of the invention has the advantages of stable lifting and high guiding and positioning precision: the temporary storage container is vertically lifted, and the guiding and positioning precision is high; the force bearing position of the telescopic mechanism is a thickened second telescopic rod, and the first telescopic rod only plays a role in position constraint, so that the operation is more stable; the double-group flexible component is driven by a single motor, and the synchronism is better.

4. The invention adopts double anti-falling measures, and has high safety performance: the two steel wire ropes are adopted for driving, so that the risk caused by the breakage of the steel wire ropes is reduced; the telescopic mechanism has a mechanical limiting function, and when the two steel wire ropes are completely broken, the temporary storage container can be still prevented from falling.

5. The invention depends on the dead weight to go in and out the container: the opening and closing door of the temporary storage container is in a closed state initially, when the temporary storage container is descended to the interior of the high-level storage container, the opening and closing door is opened under the action of gravity, and the detector assembly is transferred into the high-level storage container; after the transfer is finished, the temporary storage container leaves the high-level storage container, and the opening and closing door is automatically closed.

6. The temporary storage container has small volume and large stroke, the maximum lifting stroke of the temporary storage container is 7m, and the overall dimension of the telescopic mechanism is less than 1m after the telescopic mechanism is completely contracted; the whole storage and transfer process can be automatically finished by one key.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of a liftable temporary storage container assembly;

FIG. 2 is a schematic structural view of a temporary storage container;

FIG. 3 is a schematic view of the opening and closing door of the temporary storage container in a closed state;

FIG. 4 is a schematic view of the opening and closing door of the temporary storage container in an opened state;

FIG. 5 is a schematic structural view of the telescoping mechanism;

FIG. 6 is a left or right side view of FIG. 5;

FIG. 7 is a schematic view of the rail assembly;

fig. 8 is a schematic structural view of the hoisting mechanism.

Reference numbers and corresponding part names in the drawings:

1-shielding cylinder, 2-temporary storage container, 3-telescopic mechanism, 4-guide rail component, 5-hoisting mechanism, 201-cylinder, 202-first torsion spring, 203-opening and closing door, 204-buckle, 205-second torsion spring, 301-first telescopic rod, 302-second telescopic rod, 303-support frame, 304-counterweight block, 305-round rod, 401-sliding block, 402-guide rail, 403-base, 501-winding drum, 502-rotating shaft, 503-bearing seat and 504-handle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.