Spent fuel charging simulation device and use method
By designing a spent fuel loading simulation device, the problem of increased radiation dose caused by spent fuel spherical arching was solved. Simulation training improved the operational proficiency of maintenance personnel and reduced the risk of radiation exposure.
Patent Information
- Application Number
- CN202511582842.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-02-06
AI Technical Summary
The arching of spent fuel balls inside the charging pipe leads to an increase in radiation dose around the equipment. The low skill level of maintenance personnel makes it impossible to effectively simulate this, thus increasing the risk of radiation exposure.
Design a spent fuel loading simulation device, including an operating platform, pipelines and tank ports, to allow maintenance personnel to perform actual operations on the simulation device, improve their proficiency and reduce radiation dose.
Training with simulation devices reduced maintenance operation time, lowered radiation dose, improved the operational proficiency of maintenance personnel, and optimized maintenance plans.
Smart Images
Figure CN121483683A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of spent fuel simulation, in particular to a spent fuel loading simulation device and a use method thereof. BACKGROUND
[0002] A high temperature gas cooled reactor uses spherical fuel elements, the spherical fuel elements circulate through the core, when the burnup depth of the fuel ball reaches the specified limit, the fuel ball is unloaded from the core, the spent fuel ball is transported to the spent fuel loading device through the pipeline, and the spent fuel loading device loads the spent fuel into the spent fuel storage tank through the loading pipe.
[0003] The inner diameter of the spent fuel loading pipe is about 2 times the diameter of the fuel ball, after multiple fuel balls enter the loading pipe at the same time, arching (or blocking) is prone to occur in the loading pipe, when the spent fuel ball arches, the radiation dose around the equipment will obviously increase, in addition, the maintenance personnel cannot simulate the operation proficiency, which will cause the maintenance personnel to receive more radiation dose. SUMMARY
[0004] Therefore, the present application provides a spent fuel loading simulation device and a use method thereof to solve the problem that when the spent fuel ball arches, the radiation dose around the equipment will obviously increase, in addition, the maintenance personnel cannot simulate the operation proficiency, which will cause the maintenance personnel to receive more radiation dose.
[0005] In a first aspect, the present application provides a spent fuel loading simulation device, comprising: An operation platform, the operation platform comprises a standing plate, and the standing plate is provided with a containing hole; A pipeline is arranged through the containing hole, and the pipeline comprises a loading main pipe, the loading main pipe comprises an inlet end and an outlet end, and the inlet end is suitable for entering a spent fuel simulation ball; A tank port is detachably connected with the outlet end.
[0006] With the help of the spent fuel loading simulation device, when arching (blocking) occurs, the maintenance personnel can perform actual operation on the simulation device, improve the operation proficiency, thereby reducing the operation time and the radiation dose.
[0007] In an optional embodiment, the port height of the inlet end is 0.5-1.5 m higher than the height of the standing plate.
[0008] In an optional embodiment, the pipeline further comprises an inclined branch pipe, the inclined branch pipe is hollow, the inclined branch pipe is arranged through the inlet end, and the inclined branch pipe is arranged on the same side of the inlet end.
[0009] In an alternative embodiment, the operation platform comprises a plurality of legs, and the plurality of legs form an enclosed space to enclose the discharge end and the canister port.
[0010] In an alternative embodiment, the support base is further provided with a support plate, and the pipe passes through the support plate.
[0011] In an alternative embodiment, the support base further comprises a support frame, and the support frame encloses the discharge end.
[0012] In an alternative embodiment, the support base further comprises a support bottom plate, and the canister port is placed on the support bottom plate, and the support bottom plate is provided with a through hole, and the inner diameter of the through hole is greater than or equal to the inner diameter of the canister port.
[0013] In an alternative embodiment, a limiting screw is further provided, and the limiting screw abuts against the pipe after passing through the support frame.
[0014] In an alternative embodiment, the outer peripheral wall of the pipe is provided with a limiting sleeve, and the limiting sleeve is rotationally connected with the limiting screw.
[0015] In a second aspect, the application further provides a method for using the spent fuel loading simulation device, and the spent fuel simulation ball enters from the feeding end, falls along the inner wall of the pipe, and reaches the canister port of the discharge end. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0017] Figure 1 FIG. 1 is a schematic view of a spent fuel loading simulation device according to an embodiment of the present application; Figure 2 FIG. 2 is a schematic view of a support base, a loading main pipe and a canister port according to an embodiment of the present application.
[0018] Reference signs: 1, operation platform; 101, standing plate; 102, leg; 2, pipe; 201, feeding end; 202, loading main pipe; 203, inclined branch pipe; 204, limiting ring; 3, support base; 301, support leg; 302, first support side plate; 303, second support side plate; 304, limiting screw; 305, support bottom plate; 306, support plate; 4, maintenance personnel; 5, canister port. DETAILED DESCRIPTION
[0019] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.
[0020] The embodiments of the present application are described below with reference to the drawings. Figures 1 to 2
[0021] According to the embodiments of the present application, in one aspect, a spent fuel charging simulation device is provided, comprising: an operation platform 1 comprising a standing plate 101, wherein the standing plate 101 is provided with a receiving hole; a pipe 2 penetrating through the receiving hole, wherein the pipe 2 comprises a charging main pipe 202, the charging main pipe 202 comprises a feeding end 201 and a discharging end, the feeding end 201 is suitable for entering a spent fuel simulation ball; and a tank port 5, which is detachably connected with the discharging end. The spent fuel simulation ball enters from the feeding end 201, falls along the inner wall of the pipe 2 to the tank port 5 of the discharging end, thereby simulating the real falling condition of the spent fuel ball. With the help of the spent fuel charging simulation device, when the arching (clogging) problem occurs, the maintenance personnel 4 can perform actual operation on the simulation device, improve the proficiency of operation, thereby reducing the operation time and the radiation dose. In the embodiment, the charging main pipe 202 is vertically arranged (the feeding end 201 is located above and the discharging end is located below), the inner diameter of the tank port 5 is smaller than the inner diameter of the discharging end, and the pipe 2 is hollowly arranged.
[0022] In one embodiment, as shown in Figure 1 , Figure 2 , the port height of the feeding end 201 is higher than the height of the standing plate 101, which is 0.5-1.5 m, so as to facilitate the personnel standing on the standing plate 101 to operate the spent fuel simulation ball to be put into the feeding end 201, and make the spent fuel simulation ball flow out through the discharging end after passing through the pipe 2. In the embodiment, the port height of the feeding end 201 is preferably 1.2 m higher than the height of the standing plate 101.
[0023] In one embodiment, as shown in Figure 1 , Figure 2 , the pipe 2 further comprises an inclined branch pipe 203, the inclined branch pipe 203 is hollowly arranged, the inclined branch pipe 203 is penetratingly arranged with the feeding end 201, and the inclined branch pipe 203 is arranged on the same side of the feeding end 201. In the embodiment, as shown in Figure 1 , Figure 2 As shown, the inclined branch pipe 203 is located above the standing plate 101 and is connected with the feed end 201. When the blockage problem of the fuel simulation balls in the pipeline 2 occurs, the personnel will insert the tool into the inclined branch pipe 203, and solve the blockage (or arching) problem by operating the tool to dredge the pipeline 2.
[0024] In one embodiment, as shown in Figure 1 , Figure 2 As shown, the operation platform 1 includes a plurality of legs 102, which form an enclosed space to enclose the discharge end and the tank port 5. In this embodiment, the number of legs 102 is four, which are arranged in a rectangle to form an enclosed space. The bottom of the leg 102 is in contact with the ground, and the lowest surface of the tank port 5 is spaced apart from the ground.
[0025] In one embodiment, as shown in Figure 1 , Figure 2 The support seat 3 is further provided with a support plate 306, and the pipeline 2 penetrates through the support plate 306 to support the pipeline 2.
[0026] In one embodiment, as shown in Figure 1 , Figure 2 The support seat 3 further includes a support frame, which encloses the discharge end to avoid any shaking of the pipeline 2.
[0027] In one embodiment, as shown in Figure 1 , Figure 2 The support seat 3 further includes a support bottom plate 305, and the tank port 5 is placed on the support bottom plate 305. The support bottom plate 305 is provided with a through hole, and the inner diameter of the through hole is greater than the inner diameter of the tank port 5 to prevent the through hole from interfering with the fuel simulation balls flowing out of the tank port 5, and to avoid the blockage (or arching) problem caused by the existence of the support bottom plate 305. In this embodiment, as shown in Figure 1 , Figure 2 The support bottom plate 305 is arranged below the tank port 5, and is used to support the tank port 5 and the pipeline 2 to play a supporting role.
[0028] In one embodiment, as shown in Figure 1 , Figure 2 The limiting screw 304 penetrates through the support frame and abuts against the pipeline 2. In this embodiment, as shown in Figure 1 , Figure 2As shown, the support frame comprises a first support side plate 302 and four support legs 301, the discharge end is enclosed by the four support legs 301, the first support side plate 302 is arranged between adjacent support legs 301, a limiting screw rod 304 is arranged on each support side plate, the limiting screw rod 304 is threadedly connected with the first support side plate 302, and the four limiting screw rods 304 abut against the outer circumferential wall of the pipeline 2 from four different directions to play a limiting role.
[0029] In the embodiment, as shown in Figure 1 , Figure 2 a second support side plate 303 is further included, wherein the height of the second support side plate 303 is lower than the height of the first support side plate 302, the annular outer edge of the support bottom plate 305 is placed on the second support side plate 303, and the support bottom plate 305 is fixed to the second support side plate 303 by fasteners, and the support bottom plate 305 and the second support side plate 303 jointly support the tank port 5. Specifically, the fastener is a bolt.
[0030] In one embodiment, as shown in Figure 1 , Figure 2 Figure 1 Figure 2 the outer circumferential wall of the pipeline 2 is provided with a limiting sleeve, and the limiting sleeve is rotationally connected with the limiting screw rod 304. In the embodiment, the pipeline 2 is fixedly connected with the limiting sleeve, the limiting sleeve is provided with at least two limiting holes in the length direction of the pipeline 2, the limiting holes are provided with internal threads, and the limiting holes are matched with the limiting screw rod 304 to limit the pipeline 2. Through the cooperation of the limiting sleeve and the support bottom plate 305, the overall support of the pipeline 2 and the tank port 5 is realized.
[0031] In the embodiment, in order to realize the simulation of the real environment, the size of the pipeline 2 and the tank port 5 is completely the same as that of the actual environment.
[0032] According to the embodiment of the present application, on the other hand, a use method of the spent fuel simulation device is also provided, comprising the following steps: (1) installing the support bottom plate 305, fastening and placing the support bottom plate 305 on the second support side plate 303; (2) placing the tank port 5 on the support bottom plate 305, connecting the discharge end of the pipeline 2 with the tank port 5 after passing through the standing plate 101 and the support plate 306 in sequence, and rotationally connecting the limiting screw rod 304 with the limiting sleeve after passing through the first support side plate 302 to realize the support of the pipeline 2; (3) the maintenance personnel 4 loads the spent fuel simulation ball into the pipeline 2 through the feeding end 201 according to the working condition, the spent fuel simulation ball reaches the discharge port along the pipeline 2 under the action of gravity and flows out through the tank port 5, and the accumulation of the spent fuel ball at the discharge end will form a blockage (arched blockage); (4) The maintenance personnel 4 uses the special tool to stretch into the inclined branch pipe 203 to carry out the unblocking operation simulation, effectively improves the operation skill, and verifies the availability of the special tool.
[0033] The spent fuel loading simulation device has the following advantages: (1) The use and verification of the maintenance tool on the simulation device ensure the availability of the tool and reduce the operation time; (2) The actual operation of the maintenance personnel 4 on the simulation device improves the operation proficiency, thereby reducing the operation time and the radiation dose; (3) The maintenance personnel 4 carries out the maintenance scheme simulation on the simulation device, optimizes the maintenance scheme, and improves the operation efficiency; (4) The port of the feeding end 201 is higher than the height of the standing plate 101, so that the personnel can stand on the standing plate 101 to operate the spent fuel simulation ball to be put into the feeding end 201, and the spent fuel simulation ball flows out through the discharging end after passing through the pipeline 2; (5) Each supporting side is provided with a limiting screw rod 304, the limiting screw rod 304 is in threaded connection with the first supporting side plate 302, and the four limiting screw rods 304 abut against the outer peripheral wall of the pipeline 2 from four different directions to play a limiting role; (6) The limiting sleeve and the supporting bottom plate 305 are cooperated to realize the overall support of the pipeline 2 and the tank port 5.
[0034] As an alternative embodiment, the inner diameter of the through hole of the supporting bottom plate 305 is equal to the inner diameter of the tank port 5.
[0035] As an alternative embodiment, the size of the pipeline 2 and the tank port 5 can be proportionally reduced compared with the actual size.
[0036] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.
Claims
1. A spent fuel charging simulation device, characterized in that, include: The operating platform (1) includes a standing plate (101) with a receiving hole. A pipe (2) is provided through the receiving hole. The pipe (2) includes a main loading pipe (202). The main loading pipe (202) includes an inlet end (201) and an outlet end. The inlet end (201) is adapted to enter the spent fuel simulation sphere. The material tank port (5) is detachably connected to the discharge end.
2. The spent fuel charging simulation device according to claim 1, characterized in that, The height of the feed end (201) is 0.5-1.5m higher than the height of the standing plate (101).
3. The spent fuel charging simulation device according to claim 1, characterized in that, The pipeline (2) also includes an inclined branch pipe (203), which is hollow and is connected to the feed end (201). The inclined branch pipe (203) and the feed end (201) are on the same side.
4. The spent fuel charging simulation device according to claim 3, characterized in that, The operating platform (1) includes several legs (102), which form an enclosing space to enclose the discharge end and the tank port (5).
5. The spent fuel charging simulation device according to any one of claims 1-4, characterized in that, It also includes a support base (3), which is provided with a support plate (306), and the pipe (2) is arranged through the support plate (306).
6. The spent fuel charging simulation device according to claim 5, characterized in that, The support base (3) also includes a support frame that encloses the discharge end.
7. The spent fuel charging simulation device according to claim 6, characterized in that, The support base (3) also includes a support base plate (305), the material tank port (5) is placed on the support base plate (305), the support base plate (305) is provided with a through hole, the inner diameter of the through hole is greater than or equal to the inner diameter of the material tank port (5).
8. The spent fuel charging simulation device according to claim 7, characterized in that, It also includes a limiting screw (304), which passes through the support frame and abuts against the pipe (2).
9. The spent fuel charging simulation device according to claim 8, characterized in that, The outer peripheral wall of the pipe (2) is provided with a limiting sleeve, which is rotatably connected to the limiting screw (304).
10. A method of using a spent fuel loading simulation device, for using the spent fuel loading simulation device according to claim 1, characterized in that, The spent fuel simulation ball enters from the feed end (201) and falls along the inner wall of the pipe (2) to the discharge end tank port (5).