Jig for filling and protecting position measurement assembly of fuel exchanger separator

Abstract

According to one embodiment of the present invention, a jig for filling and protecting a separator assembly of a fuel exchanger comprises: a bellows housing block coupled to the separator assembly of the fuel exchanger to prevent contraction of the bellows due to negative pressure during the filling of the separator assembly; and a rod push nut coupled to the rod of the separator assembly to protect the rod from external impact. By doing so, damage and breakage caused by external exposure through the rod and the bellows protection jig can be prevented.

Description

Technology Field

[0001] The present invention relates to a jig for protecting a rod and a bellows, and more specifically, to a jig for filling and protecting a separator assembly of a fuel exchanger. Background Technology

[0003] Unlike light water reactors, heavy water reactors must perform fuel replacement during power operation due to their design characteristics, and accordingly, they have a separate fuel exchanger as exemplified in Fig. 1. Here, Fig. 1 is a drawing illustrating the appearance of a separator assembly of a fuel exchanger.

[0004] Two of these fuel exchangers are operated per generator unit, and when the exchanger on side A loads new fuel, the exchanger on side C on the opposite side receives and discharges spent fuel.

[0005] At this time, the separator assembly of the fuel exchanger detects the movement position of the fuel and sends a signal to the computer to stop the ram at the correct position, and inserts a stopper between the fuels to separate and stop them.

[0006] In addition, the separator assembly of the fuel exchanger performs important roles, such as pushing the separated fuel into the magazine to enable fuel release.

[0007] To this end, the separator assembly of the fuel exchanger is composed of a Potentiometer Assembly that detects the position of the separator, a Magnet Assembly, and a Safety Latch Assembly that secures the insertion and withdrawal of the fuel stopper.

[0008] As illustrated in FIG. 2, the separator assembly of such a fuel exchanger may have a rod exposed due to the application of a conventional bellows bracket, and thus has the following problems. FIG. 2 is a drawing illustrating the appearance of a separator assembly of a fuel exchanger in which a rod is exposed due to the application of a conventional bellows bracket.

[0009] a. Damage or breakage to exposed rods or bellows caused by external impact during loading and transport

[0010] B. Since the bracket is made of thin sheet metal, front and rear play occurs when fixing the external bellows.

[0011] c. Since various parts are combined, the length of the outer bellows is not fixed at a constant level.

[0012] D. When checking the difference between Normal and Stand-By resistance of the separator assembly (position measuring assembly) before and after charging, measurement is difficult when verifying the 0–10 kΩ range because the load cannot be fixed in place. The problem to be solved

[0014] The present invention has been devised to solve the above-mentioned problems, and the objective of the present invention is to provide a jig for filling and protecting a separator assembly of a fuel exchanger, which can prevent bellows shrinkage due to negative pressure and prevent damage and breakage due to external impact while the separator assembly (position measuring assembly) and the jig are assembled. means of solving the problem

[0016] A jig for filling and protecting a separator assembly of a fuel exchanger according to one embodiment of the present invention for achieving the above objective comprises: a bellows housing block coupled to the separator assembly of the fuel exchanger to prevent contraction of the bellows due to negative pressure when the separator assembly is filled with oil; and a rod push nut coupled to the rod of the separator assembly to protect the rod from external impact.

[0017] And the bellows housing block is assembled from a plurality of block members and coupled to the bellows of the separator assembly, and an internal space can be formed to accommodate the bellows inside when assembled.

[0018] In addition, the jig for filling and protecting a separator assembly of a fuel exchanger according to one embodiment of the present invention may further include a guide pin that is fastened to the inside of the bellows housing block when assembling the bellows housing block, thereby fixing the bellows received inside the bellows housing block.

[0019] And, according to one embodiment of the present invention, the jig for filling and protecting a separator assembly of a fuel exchanger may further include a first wrench bolt that causes the housing of the separator assembly and the bellows housing block to be bolted together along the longitudinal direction.

[0020] In addition, a jig for filling and protecting a separator assembly of a fuel exchanger according to one embodiment of the present invention may include a second wrench bolt that allows a bellows housing block and a rod push nut to be bolted together along the longitudinal direction.

[0021] And the first wrench bolt and the second wrench bolt can, when the first wrench bolt causes the housing of the separator assembly and the bellows housing block to be bolted together on one side of the bellows housing block, cause the second wrench bolt to cause the bellows housing block and the rod push nut to be bolted together on the other side of the bellows housing block.

[0022] In addition, a jig for filling and protecting a separator assembly of a fuel exchanger according to one embodiment of the present invention may further include a rod length adjustment bolt that is fastened to the other end of a rod push nut when one end of a rod push nut is fastened to a bellows housing block, so that the length of the rod of the separator assembly is adjusted to a constant value.

[0023] Meanwhile, according to another embodiment of the present invention, a jig for filling and protecting a separator assembly of a fuel exchanger comprises: a bellows housing block coupled to the separator assembly of the fuel exchanger to prevent contraction of the bellows due to negative pressure during the filling of the separator assembly; and a guide pin fastened to the inner side of the bellows housing block during assembly to fix the bellows accommodated in the inner side of the bellows housing block. Effects of the invention

[0025] As described above, according to the embodiments of the present invention, damage and breakage caused by external exposure through a jig for protecting a rod and bellows can be prevented.

[0026] In addition, according to embodiments of the present invention, front and rear play can be prevented when fixing the outer bellows with an integrated jig, and the length of the outer bellows can be fixed at a constant level when assembling with the jig during filling.

[0027] And according to the embodiments of the present invention, when checking the resistance difference between Normal and Stand-By of the separator position measurement assembly before and after filling, the load pressing is fixed by a wheel, making it possible to check without fluctuation in the resistance value when measuring in the 0 to 10 kΩ range. Brief explanation of the drawing

[0029] FIG. 1 is a drawing illustrating the appearance of a separator assembly of a fuel exchanger. FIG. 2 is a drawing illustrating the appearance of a separator assembly of a fuel exchanger in which a conventional bellows bracket is applied and the rod is exposed. FIG. 3 is a drawing provided for the description of a jig for oil filling and protection of a separator assembly of a fuel exchanger according to one embodiment of the present invention. FIG. 4 is a drawing illustrating the application of a jig for oil filling and protection of a separator assembly of a fuel exchanger according to one embodiment of the present invention. FIG. 5 is a drawing provided for the description of a bellows housing block according to an embodiment of the present invention, FIG. 6 is a drawing provided for the description of a load push nut according to an embodiment of the present invention, and FIG. 7 is a drawing provided for the description of a bolt for adjusting rod length according to one embodiment of the present invention. Specific details for implementing the invention

[0030] The present invention will be described in more detail below with reference to the drawings. To clearly explain the invention, parts unrelated to the description have been omitted from the drawings, and in the drawings, the width, length, thickness, etc., of the components may be exaggerated for convenience.

[0031] FIG. 3 is a drawing provided for the description of a jig for oil filling and protection of a separator assembly of a fuel exchanger according to one embodiment of the present invention, FIG. 4 is a drawing illustrating the application of a jig for oil filling and protection of a separator assembly of a fuel exchanger according to one embodiment of the present invention, FIG. 5 is a drawing provided for the description of a bellows housing block (110) according to one embodiment of the present invention, FIG. 6 is a drawing provided for the description of a rod push nut (120) according to one embodiment of the present invention, and FIG. 7 is a drawing provided for the description of a rod length adjustment bolt (160) according to one embodiment of the present invention.

[0032] The jig for filling and protecting the separator assembly of a fuel exchanger according to the present embodiment is provided to prevent bellows shrinkage due to negative pressure and to prevent damage and breakage due to external impact while the separator assembly (position measuring assembly) and the jig are assembled.

[0033] To this end, the jig for filling and protecting the separator assembly may include a bellows housing block (110), a rod push nut (120), a guide pin (130), a first wrench bolt (140), a second wrench bolt (150), and a rod length adjustment bolt (160).

[0034] The bellows housing block (110) is coupled to the separator assembly of the fuel exchanger, so that when the separator assembly is filled with oil, the bellows can be prevented from contracting due to negative pressure and the length of the outer bellows can be maintained constant, so that the initial leading resistance value of the separator assembly (position measuring assembly) can be set constant.

[0035] Specifically, the bellows housing block (110) can be assembled from two or more block members as illustrated in FIG. 5 and coupled to the bellows of the separator assembly.

[0036] At this time, the bellows housing block (110) has an internal space formed therein to accommodate the bellows during assembly, thereby preventing the internal bellows from shrinking due to negative pressure.

[0037] The rod push nut (120) is coupled to the rod of the separator assembly and can protect the rod from external impact.

[0038] Specifically, the rod push nut (120) is formed to extend along the longitudinal direction and is coupled to the rod of the separator assembly so that the rod of the separator assembly is not exposed to the outside, thereby protecting the rod from external impact and allowing the rod length adjustment bolt (160) to be fastened.

[0039] The guide pin (130) can be fastened to the inside of the bellows housing block (110) when assembling the bellows housing block (110), thereby allowing the bellows housed inside the bellows housing block (110) to be fixed.

[0040] The first wrench bolt (140) can cause the housing of the separator assembly and the bellows housing block (110) to be bolted together along the longitudinal direction.

[0041] The second wrench bolt (150) can allow the bellows housing block (110) and the rod push nut (120) to be bolted together along the longitudinal direction.

[0042] Specifically, the first wrench bolt (140) and the second wrench bolt (150) can be configured such that when the first wrench bolt (140) causes the housing of the separator assembly and the bellows housing block (110) to be bolted together on one side of the bellows housing block (110), the second wrench bolt (150) causes the bellows housing block (110) and the rod push nut (120) to be bolted together on the other side of the bellows housing block (110).

[0043] Additionally, it is preferable that the length of the first wrench bolt (140) be longer than the length of the second wrench bolt (150). In this case, the length of the first wrench bolt (140) is determined by considering the thickness of the housing of the separator assembly and the thickness of one side of the bellows housing block (110), and the length of the second wrench bolt (150) can be determined by considering the thickness of the other side of the bellows housing block (110) and the thickness of the nut portion of the rod push nut (120).

[0044] The jig for filling and protecting the separator assembly is implemented as an integral unit by assembling the housing of the separator assembly, the bellows housing block (110), and the rod push nut (120) through the first wrench bolt (140) and the second wrench bolt (150), thereby minimizing the gap between the front and rear of the outer bellows when the outer bellows is fixed.

[0045] The rod length adjustment bolt (160) can be fastened to the other end of the rod push nut (120) when one end of the rod push nut (120) is fastened to the bellows housing block (110), so that the length of the rod of the separator assembly can be adjusted to a constant value.

[0046] When checking the difference in Normal and Stand-By resistance before and after filling of the separator assembly, the operator can check without fluctuation in resistance value when measuring in the 0 to 10 kΩ range by fixing the length of the rod at a constant level through the rod length adjustment bolt (160).

[0047] Here, the Linear Potentiometer of the separator assembly (separator position measuring assembly) is a Normal, Stand-By integrated type and has a total resistance value of about 10 kΩ.

[0048] 4.9VDC can be supplied to the potentiometer to derive and use the reading voltage value, and the computer can generate an A / I Loss of Sync. alarm when the maximum △V value of the Normal, Stand-By potentiometer is 40mV.

[0049] Automatic operation stops when a computerized alarm is triggered, and because this causes delays in fuel replacement and requires the replacement of the Separator Potentiometer Assembly, the integrity of the Potentiometer Assembly must be verified before use in the system.

[0050] For example, when converting 40mV into resistance, an A / I Loss Of Sync. alarm may occur when the resistance is approximately 82Ω, so the reading resistance value of the Normal, Stand-By Potentiometer before charging can be checked by using the load length adjustment bolt (160) to determine whether the Potentiometer is usable.

[0051] At this time, when checking the difference in resistance between Normal and Stand-By, the operator can use the rod length adjustment bolt (160) to divide the total resistance value of about 10 kΩ into 10 sections to check the difference in resistance value from 0 to 10 kΩ.

[0052] So far, preferred embodiments of the separator assembly filling and protection jig for a fuel exchanger have been described in detail.

[0053] According to embodiments of the present invention, damage and breakage caused by external exposure through a jig for protecting a rod and bellows can be prevented.

[0054] In addition, according to embodiments of the present invention, front and rear play can be prevented when fixing the outer bellows with an integrated jig, and the length of the outer bellows can be fixed at a constant level when assembling with the jig during filling.

[0055] And according to the embodiments of the present invention, when checking the resistance difference between Normal and Stand-By of the separator position measurement assembly before and after filling, the load pressing is fixed by a wheel, making it possible to check without fluctuation in the resistance value when measuring in the 0 to 10 kΩ range.

[0056] Furthermore, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the invention as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention. Explanation of the symbols

[0058] 110 : Bellows housing block 120 : Rod push nut 130 : Guide pin 140 : 1st Wrench Bolt 150 : 2nd Wrench Bolt 160 : Rod length adjustment bolt (Adjusting bolt)

Claims

Claim 1 A jig for filling and protecting a separator assembly of a fuel exchanger, comprising: a bellows housing block coupled to the separator assembly of the fuel exchanger to prevent contraction of the bellows due to negative pressure during the filling of the separator assembly; and a rod push nut coupled to the rod of the separator assembly to protect the rod from external impact. Claim 2 A jig for filling and protecting a separator assembly of a fuel exchanger, wherein, in claim 1, the bellows housing block is formed by assembling a plurality of block members to be coupled to the bellows of a separator assembly, and an internal space is formed to accommodate the bellows inside when assembled. Claim 3 A jig for filling and protecting a separator assembly of a fuel exchanger, characterized in that, in claim 2, it further comprises a guide pin that is fastened to the inner side of the bellows housing block during bellows housing block assembly to fix the bellows received in the inner side of the bellows housing block. Claim 4 A jig for filling and protecting a separator assembly of a fuel exchanger, characterized in that it further comprises a first wrench bolt that allows the housing of the separator assembly and the bellows housing block to be bolted together along the longitudinal direction in claim 3. Claim 5 A jig for filling and protecting a separator assembly of a fuel exchanger, characterized in that, in claim 4, it includes a second wrench bolt that allows the bellows housing block and the rod push nut to be bolted together along the longitudinal direction. Claim 6 A jig for filling and protecting a separator assembly of a fuel exchanger, wherein, in claim 5, the first wrench bolt and the second wrench bolt are characterized in that when the first wrench bolt causes the housing of the separator assembly and the bellows housing block to be bolted together on one side of the bellows housing block, the second wrench bolt causes the bellows housing block and the rod push nut to be bolted together on the other side of the bellows housing block. Claim 7 A jig for filling and protecting a separator assembly of a fuel exchanger, characterized in that, in claim 1, when one end of the rod push nut is fastened to the bellows housing block, it further comprises a rod length adjusting bolt that is fastened to the other end of the rod push nut so that the length of the rod of the separator assembly is adjusted to a constant value. Claim 8 A jig for filling and protecting a separator assembly of a fuel exchanger, comprising: a bellows housing block coupled to a separator assembly of a fuel exchanger to prevent contraction of the bellows due to negative pressure during the filling of the separator assembly; and a guide pin fastened to the inner side of the bellows housing block during assembly to secure the bellows housed inside the bellows housing block.

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