High-energy pipeline arrangement method for nuclear power plant

Abstract

The invention provides a nuclear power plant high-energy pipeline arrangement method. The nuclear power plant high-energy pipeline arrangement method comprises the step of planning arrangement structures of a plurality of high-energy pipelines. And the positions of all welding seams on the multiple high-energy pipelines are obtained. The position of a plastic hinge joint when the welding seam is broken is obtained, the distance between the position of the welding seam and the position of the corresponding plastic hinge joint is two times of a first distance, the distance between the nuclear island and the conventional island is a second distance, the first distance corresponding to the welding seam is compared with the second distance, and when the first distance corresponding to the welding seam is smaller than the second distance, the welding seam is broken; and S3, when the welding seams are qualified, and when the first distance corresponding to the welding seams is larger than or equal to the second distance, the step S1 to the step S3 are repeated until all the welding seams on the multiple high-energy pipelines are qualified, or the welding seams except for at most first three welding seams, located in the conventional island, of the high-energy pipelines are qualified. The nuclear power plant high-energy pipeline arrangement method is simple in analysis process, the obtained arrangement structure can be smoothly implemented, and the cost is low.

Description

Technical Field

[0001] The invention relates to the field of nuclear power, and in particular to a method for arranging high-energy pipelines in a nuclear power plant. Background Art

[0002] When a high-energy pipeline in a nuclear power plant ruptures, fluid will be ejected at the rupture location, causing the high-energy pipeline to swing. Therefore, the reasonable layout of the high-energy pipeline is crucial to the safe operation of the nuclear power plant. In related technologies, high-energy pipelines are arranged by stress analysis, point-by-point analysis or simulation, but the analysis and simulation process of the above methods is relatively complicated, and the obtained layout structure conflicts with the requirements of the specification, or there is a need to thicken the wall or add a large number of anti-swing devices, resulting in high costs. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least some extent. To this end, an embodiment of the present invention proposes a method for arranging high-energy pipelines in a nuclear power plant, the analysis process of which is simple, the obtained arrangement structure can be smoothly implemented, and the cost is low.

[0004] The method for arranging high-energy pipelines in a nuclear power plant according to an embodiment of the present invention comprises:

[0005] S1. Plan the layout structure of several high-energy pipelines connecting the nuclear island and the conventional island;

[0006] S2. Obtaining the positions of all welds on the high-energy pipelines;

[0007] S3, obtaining the position of the plastic hinge node when the weld is broken, twice the distance between the position of the weld and the corresponding position of the plastic hinge node is recorded as the first distance, and the distance between the nuclear island and the conventional island is recorded as the second distance,

[0008] The first distance and the second distance corresponding to the weld are compared respectively,

[0009] When the first distance corresponding to the weld is smaller than the second distance, the weld is qualified.

[0010] When the first distance corresponding to the weld is greater than or equal to the second distance, repeat steps S1 to S3.

[0011] Until all the welds on the several high-energy pipelines are qualified, or, along the flow direction of the medium in the high-energy pipeline, all the welds except for the first three welds of the high-energy pipeline located in the conventional island are qualified.

[0012] The high-energy pipeline layout method of a nuclear power plant in an embodiment of the present invention first preliminarily plans the layout structure of several high-energy pipelines, then obtains the positions of all welds, and then obtains the position of the plastic hinge node when the weld breaks, and obtains the first distance, respectively compares the first distance corresponding to the weld with the second distance, when the first distance is less than the second distance, the weld is qualified, when the first distance is greater than or equal to the second distance, the high-energy pipeline will hit the nuclear island structure when the weld breaks, so repeat steps S1 to S3 to re-plan the layout structure of the high-energy pipeline, and compare the first distance corresponding to the re-planned weld with the second distance again, until all the welds on several high-energy pipelines are qualified, or, along the flow direction of the medium in the high-energy pipeline, except for the first three welds of the high-energy pipeline located in the conventional island, the welds are all qualified, and the final layout structure is obtained. Therefore, the analysis process of the high-energy pipeline layout method of the nuclear power plant in the embodiment of the present invention is simple, and the obtained layout structure can be smoothly implemented with low cost.

[0013] In some embodiments, step S3 further includes:

[0014] When all welds except for the first three welds of the high-energy pipeline located in the conventional island are qualified along the flow direction of the medium in the high-energy pipeline, anti-throwing devices are provided for the welds whose first distance is greater than or equal to the second distance.

[0015] In some embodiments, in step S1, the arrangement structure of the plurality of high-energy pipelines satisfies:

[0016] There is a virtual center line between the nuclear island and the conventional island, the portion of the high-energy pipeline located between the nuclear island and the conventional island is arranged parallel to the virtual center line, and the portion of the high-energy pipeline located between the nuclear island and the conventional island has a constant height; and / or

[0017] Along the extension direction of the virtual center line, the distance between the position of the first weld of the high-energy pipeline from the nuclear island to the conventional island and the nuclear island is 10 times or more of the outer diameter of the high-energy pipeline.

[0018] In some embodiments, in step S1, the arrangement structure of the plurality of high-energy pipelines satisfies:

[0019] In the conventional island, another high-energy pipeline is arranged in the direction of movement of the high-energy pipeline due to rupture, and the outer diameter of the other high-energy pipeline is greater than or equal to the outer diameter of the ruptured high-energy pipeline.

[0020] In some embodiments, in step S1, the arrangement structure of the plurality of high-energy pipelines satisfies:

[0021] The portion of the high-energy pipeline located in the conventional island includes a riser and a horizontal pipe, wherein the riser extends in a vertical direction and the horizontal pipe extends in a horizontal direction.

[0022] In the conventional island, at least one horizontal tube of any one of the high-energy pipelines is arranged alternately with at least one horizontal tube of at least one other high-energy pipeline, and among all the horizontal tubes of several high-energy pipelines, the riser connected to the lowest horizontal tube is set to be higher than or flush with the highest horizontal tube.

[0023] In some embodiments, in step S1, the arrangement structure of the plurality of high-energy pipelines satisfies:

[0024] The part of the high-energy pipeline located in the conventional island includes a riser, a horizontal pipe and an elbow, the riser extends in a vertical direction, the horizontal pipe extends in a horizontal direction, and the elbow is connected between the riser and the horizontal pipe, or the elbow is connected between adjacent horizontal pipes arranged at an angle;

[0025] In the conventional island, along the direction away from the nuclear island, the high-energy pipeline starts from the first horizontal pipe, the first horizontal pipe is connected to the first vertical pipe extending downward through the first elbow, the first vertical pipe is connected to the second horizontal pipe through the second elbow, and the last horizontal pipe is connected to the last vertical pipe extending upward through the last elbow.

[0026] In some embodiments, in step S1, the arrangement structure of the plurality of high-energy pipelines satisfies:

[0027] There is a virtual center line between the nuclear island and the conventional island,

[0028] The portion of the high-energy pipeline located in the conventional island includes a riser and a horizontal pipe, wherein the riser extends in a vertical direction and the horizontal pipe extends in a horizontal direction.

[0029] In the conventional island, among all the horizontal tubes of the several high-energy pipelines, the centerline of the horizontal tube with the longest axial length is orthogonal to the virtual centerline, and except for the high-energy pipeline with the horizontal tube with the longest axial length, the other high-energy pipelines have the risers on both radial sides of the horizontal tube with the longest axial length.

[0030] In some embodiments, before step S1, the method further includes:

[0031] A1. Obtaining the plastic bending moment of the high-energy pipeline;

[0032] The position of the plastic hinge node is obtained according to the position of the corresponding weld and the plastic bending moment.

[0033] In some embodiments, step A1 includes:

[0034] A1-1, obtaining the initial jet force and steady-state jet force when the high-energy pipeline ruptures,

[0035] The high-energy pipeline comprises a pipeline body and an elbow, wherein the pipeline body and the elbow are connected by welding to form the weld.

[0036] Obtaining the weight per unit length of the pipeline body and the single body weight of the elbow;

[0037] A1-2. Obtain the plastic bending moment according to the initial injection force, the steady-state injection force, the weight per unit length of the pipe body and the single body weight of the elbow.

[0038] In some embodiments, in the repeated step S1, the arrangement structures of the plurality of high-energy pipelines satisfy:

[0039] The second distance is greater than a whip radius of the high-energy pipeline, and the whip radius is obtained according to the plastic bending moment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a top view of the arrangement structure obtained in an embodiment of the present invention.

[0041] Reference numerals:

[0042] 1. Nuclear island building; 2. Conventional island main building; 3. Virtual center line; 4. First high-energy pipeline; 5. Second high-energy pipeline; 6. Third high-energy pipeline; 7. Horizontal pipe; 8. Elbow; 9. Vertical pipe. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0044] Reference below Figure 1 A method for arranging high-energy pipelines in a nuclear power plant according to an embodiment of the present invention is described.

[0045] like Figure 1 As shown, the high-energy pipeline arrangement method for a nuclear power plant according to an embodiment of the present invention includes:

[0046] S1. Plan the layout structure of several high-energy pipelines connecting the nuclear island and the conventional island.

[0047] Specifically, firstly, a layout structure of several high-energy pipelines connecting the nuclear island and the conventional island is preliminarily planned, and the number of high-energy pipelines is preferably at least two.

[0048] S2. Obtain the locations of all welds on several high-energy pipelines.

[0049] Specifically, the high-energy pipeline includes a pipeline body and an elbow, and the pipeline body and the elbow are welded to form a weld. In other words, the weld in the embodiment of the present invention refers to the weld between the pipeline body and the elbow.

[0050] The positions of all welds on each high-energy pipeline are obtained, and the positions of the welds on all high-energy pipelines are obtained.

[0051] S3. Obtain the position of the plastic hinge node when the weld is broken. The twice of the distance between the position of the weld and the corresponding plastic hinge node is recorded as the first distance. The distance between the nuclear island and the conventional island is recorded as the second distance. The first distance corresponding to the weld is compared with the second distance respectively. When the first distance corresponding to the weld is less than the second distance, the weld is qualified. When the first distance corresponding to the weld is greater than or equal to the second distance, repeat steps S1 to S3 until all welds on the plurality of high-energy pipelines are qualified, or, along the flow direction of the medium in the high-energy pipeline, all welds except for the first three welds of the high-energy pipeline located in the conventional island are qualified.

[0052] Specifically, assuming that the weld is cracked, preferably a complete circumferential fracture occurs, the position of the plastic hinge node corresponding to the weld rupture is obtained according to the position of the weld, and twice the distance between the position of the weld and the corresponding plastic hinge node position is recorded as the first distance, and the distance between the nuclear island and the conventional island is recorded as the second distance.

[0053] The nuclear island includes nuclear island structures and the nuclear island body. The nuclear island structures include nuclear island buildings and nuclear island auxiliary structures. The nuclear island body includes the reactor. The reactor and nuclear island auxiliary structures are both located in the nuclear island building, and the reactor and nuclear island auxiliary structures are connected.

[0054] The conventional island includes conventional island structures and a conventional island body. The conventional island structures include a conventional island main plant and conventional island auxiliary structures. The conventional island main plant includes a steam turbine plant. The conventional island body includes a steam turbine generator set. The steam turbine generator set and some conventional island auxiliary structures are located in the steam turbine plant. The steam turbine generator set and some conventional island auxiliary structures are connected.

[0055] One end of the high-energy pipeline extends into the nuclear island building and is connected to the interface on the nuclear island auxiliary structure. The other end of the high-energy pipeline extends into the turbine building and is connected to the interface in some conventional islands.

[0056] The second distance is preferably the distance between the nuclear island building and the steam turbine building, and more preferably the shortest distance between the nuclear island building and the steam turbine building.

[0057] The first distance corresponding to the weld is compared with the second distance respectively. After obtaining the plastic hinge node position and the first distance corresponding to each weld, the first distance corresponding to the weld is compared with the second distance, and then the plastic hinge node position and the first distance corresponding to the next weld are obtained. Alternatively, the plastic hinge node positions and the first distances corresponding to all welds can be obtained, and then all the first distances can be compared with the second distances respectively.

[0058] In the process of comparing the first distance with the second distance respectively, all the first distances corresponding to the welds on a high-energy pipeline can be compared first, and then the first distances corresponding to the welds on the next high-energy pipeline can be compared. In the process of comparing the first distances corresponding to the welds on the same high-energy pipeline, the first distances corresponding to the welds can be compared in sequence along the arrangement direction of the nuclear island and the conventional island, preferably, the first distances corresponding to the welds can be compared in sequence along the direction from the nuclear island to the conventional island, so as to compare the first distance corresponding to the weld with the second distance in sequence.

[0059] When the first distance corresponding to the weld is smaller than the second distance, when the weld ruptures, the high-energy pipeline will not hit the nuclear island and the conventional island, especially the nuclear island, and therefore the weld is qualified.

[0060] When the first distance corresponding to the weld is greater than or equal to the second distance, the high-energy pipeline will be thrown and hit the nuclear island when the weld breaks, so the weld is unqualified. At this time, repeat steps S1 to S3, and re-plan the layout structure of several high-energy pipelines by repeating step S1 to adjust the position of the unqualified welds, and re-compare the first distance corresponding to the adjusted welds with the second distance until all welds on all high-energy pipelines are qualified, or, along the flow direction of the medium in the high-energy pipeline, all welds except the first three welds of the high-energy pipeline located in the conventional island are qualified, and the final layout structure is obtained.

[0061] The high-energy pipeline layout method of a nuclear power plant in an embodiment of the present invention first preliminarily plans the layout structure of several high-energy pipelines, then obtains the positions of all welds, and then obtains the position of the plastic hinge node when the weld breaks, and obtains the first distance, respectively compares the first distance corresponding to the weld with the second distance, when the first distance is less than the second distance, the weld is qualified, when the first distance is greater than or equal to the second distance, the high-energy pipeline will hit the nuclear island structure when the weld breaks, so repeat steps S1 to S3 to re-plan the layout structure of the high-energy pipeline, and compare the first distance corresponding to the re-planned weld with the second distance again, until all the welds on several high-energy pipelines are qualified, or, along the flow direction of the medium in the high-energy pipeline, except for the first three welds of the high-energy pipeline located in the conventional island, the welds are all qualified, and the final layout structure is obtained. Therefore, the analysis process of the high-energy pipeline layout method of the nuclear power plant in the embodiment of the present invention is simple, and the obtained layout structure can be smoothly implemented with low cost.

[0062] The high-energy pipeline arrangement method of a nuclear power plant according to an embodiment of the present invention is preferably used in a nuclear power plant using a high-temperature gas-cooled reactor, but is not limited to a nuclear power plant using a high-temperature gas-cooled reactor.

[0063] In some embodiments, step S3 also includes setting an anti-throwing device for welds whose first distance is greater than or equal to the second distance when all welds except for the first three welds of the high-energy pipeline located in the conventional island are qualified along the flow direction of the medium in the high-energy pipeline.

[0064] Specifically, after repeating steps S1 to S3, preferably after repeating steps S1 to S3 multiple times, along the flow direction of the medium in the high-energy pipeline, when all welds except for the maximum first three welds of the high-energy pipeline located in the conventional island main building are qualified, an anti-throwing device is set for the welds with a first distance greater than or equal to the second distance. In other words, when the maximum first three welds are unqualified, an anti-throwing device is set for the unqualified welds to prevent the unqualified welds from rupturing and causing whipping through the anti-throwing device.

[0065] By setting an anti-throwing device on the unqualified welds among at most the first three welds, it is avoided that the first three welds will still have the risk of whipping in the final layout structure obtained after repeated planning of the layout structure of several high-energy pipelines.

[0066] At the same time, the number of times the layout structure of a plurality of high-energy pipelines is repeatedly planned can be controlled to avoid excessively repeating the layout structure of a plurality of high-energy pipelines, which results in a complicated and time-consuming analysis process of the high-energy pipeline layout method of a nuclear power plant, and the amount of anti-swing devices used can be controlled to ensure that a qualified layout structure can be obtained while reducing the amount of anti-swing devices used, and even there is no need to set up anti-swing devices, so as to reduce the cost of the layout structure of a plurality of high-energy pipelines.

[0067] In some embodiments, in step S1, the arrangement structure of several high-energy pipelines satisfies: there is a virtual center line between the nuclear island and the conventional island, the portion of the high-energy pipeline located between the nuclear island and the conventional island is arranged parallel to the virtual center line, and the height of the portion of the high-energy pipeline located between the nuclear island and the conventional island is constant.

[0068] Specifically, there is a virtual center line between the nuclear island and the conventional island. Preferably, the center line of the steam turbine generator set is colinear with the center line of the reactor and serves as the virtual center line.

[0069] The part of the high-energy pipeline between the nuclear island and the conventional island is arranged parallel to the virtual center line, and the height of the part of the high-energy pipeline between the nuclear island and the conventional island is constant. In other words, all the parts of the high-energy pipeline between the nuclear island and the conventional island are horizontally extending pipeline bodies without elbows. This avoids the rupture of the weld at the elbow when the part of the high-energy pipeline between the nuclear island and the conventional island has an elbow, causing the elbow to hit the nuclear island.

[0070] Preferably, all high-energy pipelines located between the nuclear island and the conventional island have the same height and the same specifications and models, so that they can stop each other when the high-energy pipelines are broken.

[0071] like Figure 1 The figure shows the arrangement structure finally obtained by the high-energy pipeline arrangement method of a nuclear power plant according to an embodiment of the present invention, wherein the virtual center line 3 extends in the left-right direction, the nuclear island building 1 is arranged on the right, and the conventional island main building 2 is arranged on the left.

[0072] Several high-energy pipelines include a first high-energy pipeline 4, a second high-energy pipeline 5 and a third high-energy pipeline 6. The left ends of the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 all extend into the conventional island main building 2, and the right ends of the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 all extend into the nuclear island building 1.

[0073] The middle parts of the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 are located between the nuclear island building 1 and the conventional island main building 2, and the middle parts of the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 are arranged at intervals along the front-to-back direction. The middle parts of the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 all extend along the left-right direction and are arranged parallel to the virtual center line 3.

[0074] The middle parts of the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 are all pipeline bodies extending in the left-right direction without elbows, and the middle parts of the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 are the same height.

[0075] In some embodiments, in step S1, the arrangement structure of several high-energy pipelines satisfies: along the extension direction of the virtual center line, the distance between the position of the first weld of the high-energy pipeline from the nuclear island to the conventional island and the nuclear island is 10 times or more of the outer diameter of the high-energy pipeline.

[0076] In other words, along the direction from the nuclear island to the conventional island, the distance between the position of the first elbow on the high-energy pipeline and the nuclear island is 10 times or more of the outer diameter of the high-energy pipeline.

[0077] After the final arrangement structure is implemented, even if the first weld breaks, causing the medium in the high-energy pipeline to spray out, the sprayed medium will not be sprayed onto the nuclear island, and the first elbow will not hit the nuclear island.

[0078] Preferably, the distance between the position of the first weld on the high-energy pipeline and the nuclear island building is 10 times or more of the outer diameter of the high-energy pipeline.

[0079] Specifically, Figure 1 As shown, in the direction from right to left. The distance between the position of the first weld on the first high-energy pipeline 4 and the nuclear island building 1 is 10 times or more of the outer diameter of the first high-energy pipeline 4. The distance between the position of the first weld on the second high-energy pipeline 5 and the nuclear island building 1 is 10 times or more of the outer diameter of the second high-energy pipeline 5. The distance between the position of the first weld on the third high-energy pipeline 6 and the nuclear island building 1 is 10 times or more of the outer diameter of the third high-energy pipeline 6.

[0080] In some embodiments, in step S1, the arrangement structure of several high-energy pipelines satisfies: along the arrangement direction of the nuclear island and the conventional island, the distance between the high-energy pipelines in the conventional island and the nuclear island is greater than a certain value of the inner diameter of the high-energy pipeline, preferably 50 times or more of the inner diameter of the high-energy pipeline.

[0081] Thereby ensuring that the high-energy pipeline has a sufficient distance between the conventional island and the nuclear island. In other words, ensuring that the distance between the conventional island and the nuclear island is sufficient, even if the elbow on the high-energy pipeline is whipped, it will not whip onto the nuclear island.

[0082] Preferably, the distance between the high-energy pipeline and the conventional island main building and the nuclear island building is 50 times or more of the inner diameter of the high-energy pipeline.

[0083] Specifically, Figure 1 As shown, the length of the middle part of the first high-energy pipeline 4 along the left-right direction is 50 times or more of the inner diameter of the first high-energy pipeline 4. The length of the middle part of the second high-energy pipeline 5 along the left-right direction is 50 times or more of the inner diameter of the second high-energy pipeline 5. The length of the middle part of the second high-energy pipeline 5 along the left-right direction is 50 times or more of the inner diameter of the second high-energy pipeline 5.

[0084] In some embodiments, in step S1, the arrangement structure of several high-energy pipelines satisfies: in the conventional island master, another high-energy pipeline is provided in the direction of movement of the high-energy pipeline caused by rupture, and the outer diameter of the other high-energy pipeline is greater than or equal to the outer diameter of the ruptured high-energy pipeline.

[0085] Specifically, in a conventional island master plant, another high-energy pipeline is provided in the direction of movement of any one of the high-energy pipelines due to rupture, and the outer diameter of the other high-energy pipeline is greater than or equal to the outer diameter of the ruptured high-energy pipeline.

[0086] After the final arrangement structure is implemented, if the high-energy pipeline is ruptured and moves under the action of the ejected medium, the moving high-energy pipeline can be stopped by another high-energy pipeline. The outer diameter of the other high-energy pipeline is greater than or equal to the outer diameter of the ruptured high-energy pipeline, which can ensure that the other high-energy pipeline stops the moving high-energy pipeline.

[0087] In some embodiments, in step S1, the arrangement structure of the plurality of high-energy pipelines satisfies: the portion of the high-energy pipeline located in the conventional island includes risers and horizontal pipes, the risers extend in the vertical direction, and the horizontal pipes extend in the horizontal direction; in the conventional island, at least one horizontal pipe of any high-energy pipeline is arranged alternately with at least one horizontal pipe of at least one other high-energy pipeline; among all the horizontal pipes of the plurality of high-energy pipelines, the riser connected to the lowest horizontal pipe is set to be higher than or flush with the highest horizontal pipe.

[0088] Specifically, the portion of the high-energy pipeline located in the conventional island main plant includes a portion of the pipeline body and at least a portion of the elbow.

[0089] In other words, part of the pipeline body of the high-energy pipeline is located in the conventional island, and the other part of the pipeline body is located outside the main plant of the conventional island. The outside of the main plant of the conventional island includes the area between the conventional island and the nuclear island, as well as inside the nuclear island.

[0090] Preferably, all elbows of the high energy pipeline are located in the conventional island main plant.

[0091] Part of the pipeline body includes a riser and a horizontal pipe, the riser extends in a vertical direction and is orthogonal to the virtual center line, and the horizontal pipe extends in a horizontal direction and may be parallel to the virtual center line or orthogonal to the virtual center line. Preferably, a part of the horizontal pipe is parallel to the virtual center line and another part of the horizontal pipe is orthogonal to the virtual center line. The elbow is welded between the riser and the horizontal pipe, a weld is formed between the elbow and the riser, and a weld is also formed between the elbow and the horizontal pipe.

[0092] In a conventional island, at least one flat tube of any high-energy pipeline is arranged alternately with at least one flat tube of at least one other high-energy pipeline.

[0093] Specifically, Figure 1As shown, the first high-energy pipeline 4 has a flat tube 7 extending in the front-to-back direction, and the flat tube 7 extending in the front-to-back direction is arranged alternately with a flat tube 7 extending in the left-to-right direction of the second high-energy pipeline 5, and the flat tube 7 extending in the front-to-back direction is arranged alternately with a flat tube 7 extending in the left-to-right direction of the third high-energy pipeline 6.

[0094] Among all the horizontal pipes of several high-energy pipelines, the riser connected to the lowest horizontal pipe is arranged to be higher than or flush with the highest horizontal pipe.

[0095] Specifically, among all the horizontal pipes in the conventional island, at least one end of the lowest horizontal pipe is connected to a riser, which extends upward from the lowest horizontal pipe, and the top of the riser is higher than or flush with the highest horizontal pipe.

[0096] Therefore, the riser can be used as a stopper. When any high-energy pipeline is ruptured, causing the horizontal pipe to move under the action of the ejected medium, the riser can be stopped.

[0097] In some embodiments, in step S1, the arrangement structure of several high-energy pipelines satisfies: the part of the high-energy pipeline located in the conventional island includes a riser, a horizontal pipe and an elbow, the riser extends in the vertical direction, the horizontal pipe extends in the horizontal direction, the elbow is connected between the riser and the horizontal pipe, or the elbow is connected between adjacent horizontal pipes arranged at an angle. In the conventional island, in the direction away from the nuclear island, the high-energy pipeline starts from the first horizontal pipe, the first horizontal pipe is connected to the first riser extending downward through the first elbow, the first riser is connected to the second horizontal pipe through the second elbow, and the last horizontal pipe is connected to the last riser extending upward through the last elbow.

[0098] Specifically, Figure 1 As shown, in the conventional island main plant 2, along the direction from right to left, the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 all start from the corresponding first horizontal pipe 7. In other words, the first horizontal pipe 7 corresponding to the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 enters the conventional island main plant 2. In other words, the first horizontal pipe 7 corresponding to the first high-energy pipeline 4, the second high-energy pipeline 5 and the third high-energy pipeline 6 is passed through the conventional island main plant 2.

[0099] In the first high-energy pipeline 4, the first horizontal pipe 7 extends from right to left, and is connected to the first vertical pipe 9 extending downward through the first elbow 8, the bottom of the first vertical pipe 9 is connected to the second horizontal pipe 7 extending to the left through the second elbow 8, the left end of the second horizontal pipe 7 is connected to the third horizontal pipe 7 extending backward through the third elbow 8, the rear end of the third horizontal pipe 7 is connected to the second vertical pipe 9 extending downward through the fourth elbow 8, the bottom of the second vertical pipe 9 is connected to the fourth horizontal pipe 7 extending to the left, which is also the last horizontal pipe 7, through the fifth elbow 8, and the left end of the fourth horizontal pipe 7 is connected to the third vertical pipe 9 extending upward, which is also the last vertical pipe 9, through the sixth elbow 8, which is also the last elbow 8.

[0100] In the second high-energy pipeline 5, the first horizontal pipe 7 extends from right to left, and is connected to the first vertical pipe 9 extending downward through the first elbow 8. The bottom of the first vertical pipe 9 is connected to the second horizontal pipe 7 extending forward through the second elbow 8. The front end of the second horizontal pipe 7 is connected to the third horizontal pipe 7 extending to the left through the third elbow 8, which is also the last horizontal pipe 7. The left end of the third horizontal pipe 7 is connected to the second vertical pipe 9 extending upward through the fourth elbow 8, which is also the last elbow 8, which is also the last vertical pipe 9.

[0101] In the third high-energy pipeline 6, the first horizontal pipe 7 extends from right to left, and is connected to the first vertical pipe 9 extending downward through the first elbow 8. The bottom of the first vertical pipe 9 is connected to the second horizontal pipe 7 extending forward through the second elbow 8. The front end of the second horizontal pipe 7 is connected to the third horizontal pipe 7 extending to the left through the third elbow 8, which is also the last horizontal pipe 7. The left end of the third horizontal pipe 7 is connected to the second vertical pipe 9 extending upward through the fourth elbow 8, which is also the last elbow 8, which is also the last vertical pipe 9.

[0102] The third horizontal tube 7 of the first high-energy pipeline 4 is arranged alternately with the third horizontal tube 7 of the second high-energy pipeline 5 and the third horizontal tube 7 of the third high-energy pipeline 6 .

[0103] It is understandable that in other embodiments, the elbow may also be connected between adjacent flat tubes arranged at an angle, for example, between a flat tube extending in the left-right direction and a flat tube extending in the front-back direction.

[0104] Preferably, along the flow direction of the medium in the high-energy pipeline, all welds except for the first three welds of the high-energy pipeline located in the conventional island are qualified. The first three welds specifically refer to the welds formed at both ends of the first elbow in the main plant of the conventional island along the flow direction of the medium in the high-energy pipeline, and the weld formed at one end of the horizontal pipe or vertical pipe connected to the first elbow away from the first elbow.

[0105] In some embodiments, in step S1, the arrangement structure of several high-energy pipelines satisfies: there is a virtual center line between the nuclear island and the conventional island, the part of the high-energy pipeline located in the conventional island includes a riser and a horizontal pipe, the riser extends in a vertical direction, and the horizontal pipe extends in a horizontal direction, and in the conventional island, among all the horizontal pipes of the several high-energy pipelines, the center line of the horizontal pipe with the longest axial length is orthogonal to the virtual center line, and except for the high-energy pipeline with the longest axial length, the other high-energy pipelines have risers on both radial sides of the horizontal pipe with the longest axial length.

[0106] Specifically, Figure 1 As shown, in the conventional island main plant 2, the third flat pipe 7 of the first high-energy pipeline 4 is the flat pipe 7 with the longest axial length, and the third flat pipe 7 of the first high-energy pipeline 4 extends in the front-to-back direction so that its center line is orthogonal to the virtual center line 3.

[0107] The first riser 9 of the second high-energy pipeline 5 is located on the right side of the third horizontal pipe 7 of the first high-energy pipeline 4 , and the second riser 9 of the second high-energy pipeline 5 is located on the left side of the third horizontal pipe 7 of the first high-energy pipeline 4 .

[0108] The first riser 9 of the third high-energy pipeline 6 is located on the right side of the third horizontal pipe 7 of the first high-energy pipeline 4 , and the second riser 9 of the third high-energy pipeline 6 is located on the left side of the third horizontal pipe 7 of the first high-energy pipeline 4 .

[0109] In some embodiments, before step S1, the method further includes: A1, obtaining the plastic bending moment of the high-energy pipeline. The position of the plastic hinge node is obtained according to the position of the corresponding weld and the plastic bending moment.

[0110] Specifically, firstly, the plastic bending moment of the high-energy pipeline is obtained through step A1, and then steps S1 to S3 are performed in sequence. In step S3, the plastic hinge node position when the weld is ruptured is obtained, specifically, the corresponding plastic hinge node position when the weld is ruptured is obtained according to the position of the weld and the plastic bending moment. Preferably, the corresponding plastic hinge node position is calculated according to the position of the weld and the plastic bending moment.

[0111] In some embodiments, step A1 includes:

[0112] A1-1. Obtain the initial jet force and steady-state jet force when the high-energy pipeline ruptures. The high-energy pipeline includes a pipeline body and an elbow. The pipeline body and the elbow are welded together to form a weld. Obtain the weight per unit length of the pipeline body and the single body weight of the elbow.

[0113] Specifically, the initial jet force and steady-state jet force when the high-energy pipeline ruptures are obtained by calculation, and the weight per unit length of the pipeline body and the single weight of the elbow are obtained, preferably the weight of the pipeline body per meter and the weight of a single elbow. It should be noted that the single weight of all elbows of the high-energy pipeline is consistent.

[0114] A1-2. The plastic bending moment is calculated based on the initial injection force, the steady-state injection force, the weight per unit length of the pipe body and the single weight of the elbow.

[0115] Specifically, the plastic bending moment is obtained by calculation according to the initial injection force, the steady-state injection force, the weight per unit length of the pipeline body and the single body weight of the elbow.

[0116] In some embodiments, in the repeated step S1, the arrangement structure of the plurality of high-energy pipelines satisfies: the second distance is greater than the whip radius of the high-energy pipeline, and the whip radius is obtained according to the plastic bending moment.

[0117] Specifically, in the repeated step S1, in other words, in all the subsequent steps S1 except the first step S1 for preliminarily planning the layout structure of several high-energy pipelines. When repeatedly planning the layout structure of several high-energy pipelines, in other words, when adjusting the layout structure of several high-energy pipelines preliminarily planned. The layout structure of several high-energy pipelines also satisfies that the second distance is greater than the whip radius of the high-energy pipeline, and the whip radius is obtained according to the plastic bending moment. Preferably, the whip radius is obtained by calculation according to the plastic bending moment.

[0118] Ensure that the impact radius of the first elbow of the high-energy pipeline is less than half the distance between the nuclear island and the conventional island, preferably less than half the distance between the nuclear island building and the conventional island main building, and more preferably less than half the distance between the nuclear island building and the turbine building.

[0119] In the description of the present invention, it is necessary to understand that the terms "center", "length", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0120] In addition, the terms "first" and "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0121] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0122] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0123] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0124] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A method for arranging high-energy pipelines in a nuclear power plant, characterized in that: include: S1. Plan the layout structure of several high-energy pipelines connecting the nuclear island and the conventional island; S2. Obtaining the positions of all welds on the high-energy pipelines; S3, obtaining the position of the plastic hinge node when the weld is broken, twice the distance between the position of the weld and the corresponding position of the plastic hinge node is recorded as the first distance, and the distance between the nuclear island and the conventional island is recorded as the second distance, The first distance and the second distance corresponding to the weld are compared respectively, When the first distance corresponding to the weld is smaller than the second distance, the weld is qualified. When the first distance corresponding to the weld is greater than or equal to the second distance, repeating steps S1 to S3, Until all the welds on the several high-energy pipelines are qualified, or, along the flow direction of the medium in the high-energy pipeline, all the welds except for the first three welds of the high-energy pipeline located in the conventional island are qualified.

2. The method for arranging high-energy pipelines in a nuclear power plant according to claim 1, characterized in that: Step S3 also includes: When all welds except for the first three welds of the high-energy pipeline located in the conventional island are qualified along the flow direction of the medium in the high-energy pipeline, anti-throwing devices are provided for the welds whose first distance is greater than or equal to the second distance.

3. The method for arranging high-energy pipelines in a nuclear power plant according to claim 1, characterized in that: In step S1, the arrangement structure of the plurality of high-energy pipelines satisfies: There is a virtual center line between the nuclear island and the conventional island, the portion of the high-energy pipeline located between the nuclear island and the conventional island is arranged parallel to the virtual center line, and the portion of the high-energy pipeline located between the nuclear island and the conventional island has a constant height; and / or Along the extension direction of the virtual center line, the distance between the position of the first weld of the high-energy pipeline from the nuclear island to the conventional island and the nuclear island is 10 times or more of the outer diameter of the high-energy pipeline.

4. The method for arranging high-energy pipelines in a nuclear power plant according to claim 1, characterized in that: In step S1, the arrangement structure of the plurality of high-energy pipelines satisfies: In the conventional island, another high-energy pipeline is arranged in the direction of movement of the high-energy pipeline due to rupture, and the outer diameter of the other high-energy pipeline is greater than or equal to the outer diameter of the ruptured high-energy pipeline.

5. The method for arranging high-energy pipelines in a nuclear power plant according to claim 1, characterized in that: In step S1, the arrangement structure of the plurality of high-energy pipelines satisfies: The portion of the high-energy pipeline located in the conventional island includes a riser and a horizontal pipe, wherein the riser extends in a vertical direction and the horizontal pipe extends in a horizontal direction. In the conventional island, at least one horizontal tube of any one of the high-energy pipelines is arranged alternately with at least one horizontal tube of at least one other high-energy pipeline, and among all the horizontal tubes of several high-energy pipelines, the riser connected to the lowest horizontal tube is set to be higher than or flush with the highest horizontal tube.

6. The method for arranging high-energy pipelines in a nuclear power plant according to claim 1, characterized in that: In step S1, the arrangement structure of the plurality of high-energy pipelines satisfies: The part of the high-energy pipeline located in the conventional island includes a riser, a horizontal pipe and an elbow, the riser extends in a vertical direction, the horizontal pipe extends in a horizontal direction, and the elbow is connected between the riser and the horizontal pipe, or the elbow is connected between adjacent horizontal pipes arranged at an angle; In the conventional island, along the direction away from the nuclear island, the high-energy pipeline starts from the first horizontal pipe, the first horizontal pipe is connected to the first vertical pipe extending downward through the first elbow, the first vertical pipe is connected to the second horizontal pipe through the second elbow, and the last horizontal pipe is connected to the last vertical pipe extending upward through the last elbow.

7. The method for arranging high-energy pipelines in a nuclear power plant according to claim 1, characterized in that: In step S1, the arrangement structure of the plurality of high-energy pipelines satisfies: There is a virtual center line between the nuclear island and the conventional island, The portion of the high-energy pipeline located in the conventional island includes a riser and a horizontal pipe, wherein the riser extends in a vertical direction and the horizontal pipe extends in a horizontal direction. In the conventional island, among all the horizontal tubes of the several high-energy pipelines, the centerline of the horizontal tube with the longest axial length is orthogonal to the virtual centerline, and except for the high-energy pipeline with the horizontal tube with the longest axial length, the other high-energy pipelines have the risers on both radial sides of the horizontal tube with the longest axial length.

8. The method for arranging high-energy pipelines in a nuclear power plant according to any one of claims 1 to 7, characterized in that: Before step S1, the method further includes: A1. Obtaining the plastic bending moment of the high-energy pipeline; The position of the plastic hinge node is obtained according to the position of the corresponding weld and the plastic bending moment.

9. The method for arranging high-energy pipelines in a nuclear power plant according to claim 8, characterized in that: Step A1 includes: A1-1, obtaining the initial jet force and steady-state jet force when the high-energy pipeline ruptures, The high-energy pipeline comprises a pipeline body and an elbow, wherein the pipeline body and the elbow are connected by welding to form the weld. Obtaining the weight per unit length of the pipeline body and the single body weight of the elbow; A1-2. Obtain the plastic bending moment according to the initial injection force, the steady-state injection force, the weight per unit length of the pipe body and the single body weight of the elbow.

10. The method for arranging high-energy pipelines in a nuclear power plant according to claim 8, characterized in that: In the repeated step S1, the arrangement structures of the plurality of high-energy pipelines satisfy: The second distance is greater than a whip radius of the high-energy pipeline, and the whip radius is obtained according to the plastic bending moment.

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