KR20050070271A - Handling tool of neutron source - Google Patents

Abstract

The present invention relates to a device for handling a neutron source that allows the neutron source to be easily attached to or removed from the neutron source rod. The present invention has a hollow body having open ends at both ends, and a case tube having a slot opened at a lower end thereof. It has a hollow body with both ends open, the drive tube is accommodated in the case tube and fixed, the shaft accommodated in the drive tube and descending and descending integrally with the drive tube, the drive tube is installed outside the upper A first handle which penetrates the drive tube and is inserted into the shaft, a pusher installed at a lower portion of the lower portion of the shaft with a narrow conical protrusion at a lower portion thereof and a wide conical protrusion at the lower portion thereof; Finger which is driven to retract or unfold and which grasps and terminates the head of the neutron source, located below the first handle and A second handle, which is installed outside the tube and penetrates the case tube and is operated to be inserted into and out of the driving tube, is provided with a gripper having at least one pair so as to be rotated outside the case tube to drive or unfold the operation unit. And a gripping means for gripping a neutron source grasped by the finger when reeling.

Description

Handling device of neutron source {Handling tool of neutron source}

The present invention relates to an apparatus for handling neutron sources in a nuclear power plant, and more particularly, to an apparatus for handling neutron sources that allows a neutron source to be easily attached to or detached from a neutron source rod.

In general, power plants convert thermal or mechanical energy into electrical energy. Therefore, in order to generate electricity, it is necessary to consume a corresponding amount of energy. The source of energy for such generation is called a power generation resource or a power resource. Generators currently used for power generation use almost electromagnetic induction to convert mechanical power into electric power. Therefore, all energy flow is converted into mechanical power to generate electric power. There are batteries that convert chemical energy directly into electrical energy, or thermocouples that convert thermal energy directly into electrical energy. However, batteries are not used for large-scale power generation, and the use of thermocouples for power generation is still in the experimental stage. The power generation method and the power plant also vary according to what is used as the power generation resource. There are hydroelectric power plants, thermal power plants, nuclear power plants, tidal power plants, wind power plants, and geothermal power plants.

On the other hand, the nuclear power plant uses the heat energy obtained by the nuclear fission chain reaction by loading the nuclear fuel assembly in the reactor core. Neutrons are needed for the first nuclear fission for the chain reaction in the furnace, and depending on the natural neutrons present in the furnace, it takes time to adjust the concentration of boric acid, so it is possible to operate the reactor more quickly and safely by using an artificial neutron source. A neutron source for this is being used.

The material of the neutron source is Sb-123 + Be-4, and the design life is 30 years as the regenerated source, and each of the cores is located at positions D-13 (NW guide) and M-03 (SE guide). Two of them are loaded one by one.

In addition, as shown in FIG. 1 or 2, the neutron source rod 10 is withdrawn from the core with the fuel when the planned preventive maintenance is carried out and moved to the SFP (used fuel storage tank), then loaded in the fuel building upright machine It is moved and installed on the fuel to be made, and the work is carried out underwater.

However, the fastening mechanism of the handling device 20 and the neutron source 30 of the neutron source has a problem with the working conditions and inappropriate.

In order to fasten the neutron source 30, the handling device 20 of the neutron source should be lowered to the upper position of the source rod 10. At this time, how close the neutron source handling device 20 is to the neutron source rod 10. Since the worker could not check with the naked eye, the collision between the handling device 20 of the neutron source and the neutron source rod 10 occurred frequently and there was a problem that the neutron source 30 was damaged.

On the other hand, it is difficult to confirm whether the neutron source handling device 20 and the neutron source 30 is correctly fastened, depending on the operator's sense, there was a problem that the reliability is poor due to a lot of trial and error.

In addition, after the handling device 20 of the neutron source is opened and aligned with the neutron source 30 on the upper portion of the fuel, the plunger located above the neutron source by horizontally moving the handling device 20 of the neutron source. Plunger (not shown), where the plunger is correctly inserted into the handling device of the neutron source, the smallest plunger of 10 cm size and the handling device of the neutron source 20 cm below the water depth. There was a problem of low safety by judging whether the joint with and by the weight and the naked eye.

And, as shown in Figure 3, when the neutron source is moved after the fastening is completed, there is a potential risk of falling, the lower half of the handling device of the neutron source is overlapping two cylinders of the half, the neutron source When the handling device is closed, the inner cylinder is rotated to have a structure that is fastened to the plunger. At this time, the neutron source cannot be fully confirmed and there is a problem of falling accident due to shaking during movement.

On the other hand, the handling device of neutron source, currently supplied by the manufacturer, is not equipped with a protective film of neutron source, so it is not possible to fix the shaking that occurs during movement, and there is a problem of danger of collision with the fuel reservoir wall after use. there was.

In addition, when the moved neutron source is reinserted into the guide tube of the next cycle nuclear fuel, it may damage the neutron source due to the collision with the fuel top due to the shaking, and the rework due to incomplete seating of the neutron source is frequently performed. There was a problem that occurred.

In addition, the neutron source must be rotated to insert the upper fitting of the neutron source into the groove of the fuel. However, the mechanism of the current neutron source handling device is not a picking type, so the rotation of the neutron source Difficult, there is a problem that the work time is delayed because the rework for the groove insertion occurs frequently.

Accordingly, the present invention has been proposed to solve the above problems according to the prior art, and an object of the present invention is to provide a neutron source handling apparatus that can be easily attached to the neutron source to the neutron source rod.

Characteristics of the handling device of the neutron source according to the present invention for achieving the above object,

A case tube having a hollow body having both ends opened and a slot opened at a lower end thereof;

A driving tube having a hollow body having both ends opened and received and fixed inside the case tube;

A shaft accommodated in the driving tube and configured to move up and down integrally with the driving tube;

A first handle installed at an upper side of the driving tube and operated to penetrate the driving tube and to be inserted into the shaft;

A pusher having a lower portion at a lower end thereof and a conical protrusion having a wide upper portion installed at a lower portion of the shaft;

A finger which is rotatably installed at a lower portion of the inner side of the case tube by a hinge pin and is driven to retract or unfold to hold and release the head of the neutron source;

A second handle disposed below the first handle and installed outside the case tube and manipulated to penetrate the case tube and be inserted into the driving tube;

A holding part having at least one pair is rotatably installed on the outside of the case tube, and is configured to include a holding means for holding a neutron source held by a finger when being retracted or extended and driven by the operation of the operation unit.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the handling device of the neutron source according to the present invention will be described.

4 is a cross-sectional view showing a handling apparatus for a neutron source according to the present invention, and FIGS. 5A to 7B are enlarged views of main parts of FIG. 4.

As shown in Figure 4 to 7b, the handling device 100 of the neutron source according to the present invention is the case tube 102, the drive tube 104, the shaft 106, the first handle 108, the pusher It consists largely of the 110, the finger 112, the second handle 114 and the holding means 116.

The case tube 102 has a hollow body having both ends opened, and a slot 102-1 is provided at a lower end thereof.

The drive tube 104 has a hollow body with both ends open, and is accommodated in the case tube 102.

The shaft 106 is accommodated in the drive tube 104 is raised and lowered integrally with the drive tube 104.

The first handle 108 is installed outside the upper portion of the drive tube 104, and is manipulated to penetrate the drive tube 104 and to be inserted into the shaft 106.

The pusher 110 has a conical protrusion 110-1 having a narrow lower portion and a wider upper portion at a lower end thereof, and is installed at a lower portion of the shaft 106.

The finger 112 is rotatably installed on the inner lower portion of the case tube 102 by a hinge pin 112-1 to be gripped or unfolded to grip and release the head 200-1 of the neutron source 200. .

The second handle 114 is disposed below the first handle 108 and installed outside the case tube 102 to penetrate the case tube 102 and be inserted into the driving tube 104.

The gripping means 116 is at least one pair of gripping subsidiary 116-1 is rotatably installed on the outside of the case tube 102 to be driven or unfolded by the operation of the operation unit 116-2, When pinching, the body of the neutron source 200 held by the finger 112 is gripped.

On the other hand, the drive tube 104 is installed by calibrating the pipe (104-5) between the plurality of blocks (104-3).

In addition, a hook 106-1 is formed at the upper end of the shaft 106.

In addition, the drive tube 104 is fixed to the shaft 106 by a fixing pin 300 passing through the drive tube 104.

On the other hand, the first handle 108 is installed outside the drive tube 104, the lever 108-1 is inserted into the drive tube 104, and one end is installed outside the drive tube 104 And a support tube 108-3 supporting the lever 108-1 housed therein, and the lever 108-1 being interposed between the support tube 108-3 and the shaft 106. And an elastic member 108-5 that provides elasticity so that it can be inserted into the 106.

In addition, the pusher 110 has an entrance 110-3 formed at one end thereof, and the other end of the cylinder 110-5 installed at the fixing pin 300 fixing the drive tube 104 and the shaft 106. ), And the elevating pin 110 that is accommodated in the cylinder 110-5 and has a conical shape 110-1 protrudes out of the cylinder 110-5 and moves up and down by the shaft 106. -7) and an elastic member 110-9 that is accommodated in the cylinder 110-5 and provides elasticity to be buffered when the lifting pin 110-7 is lowered.

On the other hand, the finger 112 is inclined surface 112 to correspond to the inclined surface of the projection 110-1 of the elevating pin (110-7) protruding the grip piece 112-5 at the lower end of the body; -3) is formed.

In addition, the finger 112 is composed of at least one pair.

In addition, the second handle 114 is installed outside the drive tube 104, the lever 114-1 is inserted into the drive tube 104, and one end is installed outside the drive tube 104 is A support tube 114-3 supporting the lever 114-1 accommodated therein, and the lever 114-1 is interposed between the support tube 114-3 and the shaft 106 so that the lever 114-1 has a shaft ( It is configured to include an elastic member 114-5 to provide elasticity to be inserted into the 106.

In addition, the holding means 116 has an upper drive link (116-4) and a lower drive link (116-5) on one side of the hinge pin (116-3), the bracket is provided with the hinge pin (116-3) ( A holding member 116-1 rotatably installed at 116-7 for holding the body of the neutron source 200, and an upper / lower driving link 116-4, 116- of the holding member 116-1. 5) is coupled between the drive link 116-2 rotatably connected to the upper drive link 116-4 and adjusts the length of the lower drive link 116-5 to hold the holding member 116-1. ) And a length adjusting member 116-11 for pinching or unfolding and an operation unit 116-2 fixed to an end of the driving link 116-2 and rotating by a user's operation.

Referring to the operation of the handling device of the neutron source according to the present invention configured as described above are as follows.

When taking out the neutron source from the closed rod, the hoist is first fastened to the hook 106-1 formed at the upper end of the shaft 106 located at the innermost side.

Then, the hoist is driven to position the handling device to the upper end of the source rod.

The hoist is then operated again to seat the handling device on the sailor rods.

In this case, as shown in FIG. 7B, the lower part of the case tube 102 is located at one side of the slot 102-1 of the case tube 102 with the lower portion of the finger 112 wide.

Then, the user grasps the upper end of the drive tube 104 and presses it in the vertical downward direction.

At this time, the shaft 106 connected to the drive tube 104 is moved vertically downward, and accordingly, the insertion hole 106-5 and the lever 108 of the first handle 108 formed in the upper portion of the shaft 116. -1) is combined.

In addition, as the shaft 106 moves vertically downward, the spring 400 connected to the bottom surface of the shaft 106 presses the pusher 110 vertically.

Accordingly, the protrusion 110-1 of the pusher 110 moves downward along the inclined surface 112-3 of the finger 112.

As the protrusion 110-1 of the pusher 110 moves, the upper portion of the finger 112 is widened by the hinge pin 112-1, and the lower portion of the finger 112 is narrowed.

Accordingly, the gripping piece 112-5 of the finger 112 grips the head 200-1 of the neutron source 200 as shown in FIG. 7A.

Thereafter, the hoist is driven to draw the neutron source 200 from the closed ship rod.

On the contrary, when inserting a neutron source into a new source rod, first, the operation part 116-2 of the holding means 116 is operated so that the drawn out neutron source 200 may not fall.

When the operation unit 116-2 of the gripping means 116 is rotated in the clockwise direction, the upper drive link 116-4 is rotated without being raised and lowered, and fastened to the upper drive link 116-4. Length adjustment member 116-11 is lowered in the direction of the arrow.

Accordingly, the length adjusting member 116-11 and the lower driving link 116-5 fastened thereto are simultaneously lowered, and the pair of holding members 116-1 connected to the lower driving link 116-5 are As shown in FIG. 8, the hinge pin 116-3 rotates around the body to hold the body of the neutron source 200.

Then, the hoist is driven to position the handling device 100 of the neutron source to the top of the new source rod.

The hoist is then operated again to seat the handling device on a new sailor rod.

Then, the user grips the first handle 108 and pulls the lever 108-1 in the opposite direction to the case tube 102.

Thereby, the lever 108-1 accommodated in the support tube 108-3 is removed from the drive tube 104, and the drive tube 104 and the shaft 106 are raised in the direction of the arrow.

In addition, as the shaft 106 moves vertically, the spring 400 connected to the bottom surface of the shaft 106 is raised and the pusher 110 is vertically raised.

Accordingly, the protrusion 110-1 of the pusher 110 moves upward along the inclined surface 112-3 of the finger 112.

As the protrusion 110-1 of the pusher 110 moves, the upper portion of the finger 112 is narrowed by the hinge pin 112-1, and the lower portion of the finger 112 is widened.

Then, as shown in FIG. 9, the gripping piece 112-5 of the finger 112 grips the head 200-1 of the neutron source 200.

Accordingly, the neutron source 200 is inserted into the new source rod.

Then, the hoist is driven to remove the handling device 100 from the new source rod.

Therefore, when the neutron source is inserted into the new source rod, the neutron source is correctly inserted.

As described above, the present invention can easily align the handling device and the neutron source, and the neutron source can be easily detached from the source rod.

In addition, the present invention is safe for the handling of the neutron source, it is possible to shorten the working time and perform effective work.

1 is a view showing an apparatus for handling a neutron source according to the prior art,

Figure 2 is an enlarged view of the main portion of the handling device of the neutron source of Figure 1,

3 is a view showing a state of use when the handling device of the neutron source of Figure 1 is moved,

4 is a cross-sectional view showing a handling apparatus of a neutron source according to the present invention;

5a to 7b is an enlarged view of the main part of FIG.

8 is a state diagram used in the holding means of FIG.

9 is a view showing a state in which the neutron source is separated from the gripping piece.

<Explanation of symbols for the main parts of the drawings>

100: neutron source handling device

102: case tube

104: drive tube

106: drive tube

108: first handle

110: pusher

112: finger

114: second handle

116: holding means

Claims (10)

A case tube having a hollow body having both ends opened and a slot opened at a lower end thereof; A driving tube having a hollow body having both ends opened and received and fixed inside the case tube; A shaft accommodated in the driving tube and configured to move up and down integrally with the driving tube; A first handle installed at an upper side of the driving tube and operated to penetrate the driving tube and to be inserted into the shaft; A pusher having a lower portion at a lower end thereof and a conical protrusion having a wide upper portion installed at a lower portion of the shaft; A finger which is rotatably installed at a lower portion of the inner side of the case tube by a hinge pin and is driven to retract or unfold to hold and release the head of the neutron source; A second handle disposed below the first handle and installed outside the case tube and manipulated to penetrate the case tube and be inserted into the driving tube; A holding part having at least one pair rotatably installed on the outside of the case tube and configured to include a holding means for holding a neutron source held by a finger when being retracted or extended and driven by operation of the operation unit. Neutron source handling device. The method of claim 1, The drive tube, A neutron source handling apparatus, characterized in that the pipe is installed between a plurality of blocks are corrected. The method of claim 1, The shaft, Handling device for neutron source, characterized in that the hook is formed on the upper end. The method of claim 1, The shaft, A neutron source handling apparatus, characterized in that fixed to the drive tube by a fixing pin penetrating the drive tube. The method of claim 1, The first handle, A lever installed outside the driving tube and inserted into the driving tube; A support tube whose one end is installed outside the drive tube and supports the lever accommodated therein; And an elastic member interposed between the support tube and the shaft to provide elasticity so that the lever can be inserted into the shaft. The method of claim 1, The pusher is a cylinder that is formed in the one end is formed in the inlet and the other end fixed pin for fixing the drive tube and the shaft; An elevating pin which is accommodated in the cylinder and has a conical protrusion that protrudes out of the cylinder and is lowered by the shaft; The neutron source handling device characterized in that it comprises an elastic member that is accommodated inside the cylinder to provide elasticity to be buffered when the lifting pin is lowered. The method of claim 1, The finger handling device of the neutron source, characterized in that composed of at least a pair. The method according to claim 1 or 7, The finger is a handle of the neutron source, characterized in that the grip piece protrudes on the lower end of the body, the inclined surface is formed to correspond to the inclined surface of the projection of the elevating pin at the upper end. The method of claim 1, The second handle, A lever installed outside the driving tube and inserted into the driving tube; A support tube whose one end is installed outside the drive tube and supports the lever accommodated therein; And an elastic member interposed between the support tube and the shaft to provide elasticity so that the lever can be inserted into the shaft. The method of claim 1, The holding means, A gripping member having a link on one side of a hinge pin and rotatably installed on a bracket on which the hinge pin is installed to hold a body of a neutron source; A drive link rotatably connected to a link of the gripping member; A length adjusting member fastened between the driving links to adjust a length of the driving link to allow the holding member to be pinched or unfolded; The neutron source handling device, characterized in that it comprises a control unit fixed to the end of the drive link to rotate by the user's operation.