CN114171224B - Method for installing primary equipment of primary loop of reactor - Google Patents
Method for installing primary equipment of primary loop of reactor Download PDFInfo
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- CN114171224B CN114171224B CN202111298142.7A CN202111298142A CN114171224B CN 114171224 B CN114171224 B CN 114171224B CN 202111298142 A CN202111298142 A CN 202111298142A CN 114171224 B CN114171224 B CN 114171224B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000009434 installation Methods 0.000 claims abstract description 65
- 239000003381 stabilizer Substances 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000008439 repair process Effects 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Abstract
The invention discloses a method for installing primary equipment of a primary loop of a reactor, which comprises the following steps: s1) preassembling a reactor pressure vessel, a reactor internal component, an inner sleeve, a steam generator and a main pump shell into a vessel module, and preassembling a reactor pressure vessel top cover, a control rod driving mechanism and a reactor top structure into a reactor top module; s2) installing a main equipment bracket and a voltage stabilizer bracket; s3) hoisting the container module to a main equipment bracket, adjusting the position of the container module, and installing the container module on the main equipment bracket; and S4) installing the voltage stabilizer on the voltage stabilizer bracket, connecting the main pump motor and the hydraulic component with a main pump shell, and installing the pile top module on the container module. Compared with the prior art, the reactor-loop main equipment installation method of the invention has the advantages that each equipment is preassembled into the container module and the pile top module in the equipment assembly factory, and then the container module and the pile top module are transported to the installation site for installation, so that the installation precision and the installation efficiency can be improved.
Description
Technical Field
The invention belongs to the technical field of installation of key equipment of a nuclear power station, and particularly relates to a method for installing primary equipment of a primary loop of a reactor.
Background
At present, the primary loop equipment of the conventional land nuclear power station reactor adopts a loop design, and when the primary loop equipment is installed, single equipment is transported to a final assembly plant to be installed respectively, and the installed equipment is connected with a main pipeline by welding on site.
However, for some places with limited places (for example, a compact arrangement device reactor), the device spacing of the primary devices of the primary loop of the reactor is smaller, interfaces among the devices are numerous, the installation precision requirement is high, the installation content is complex, and the site installation construction condition is limited. Therefore, the conventional installation method of the primary loop equipment of the land nuclear power station reactor is not applicable.
In view of the foregoing, it is desirable to provide a method for installing a primary reactor circuit device that is adaptable to installation of primary reactor circuit devices with small device spacing and limited installation space.
Disclosure of Invention
The invention aims at: at least one defect in the prior art is overcome, and a method for installing the primary equipment of the primary loop of the reactor is provided, which is applicable to the installation of the primary equipment of the primary loop of the reactor with small equipment spacing and limited installation space.
In order to achieve the above object, the present invention provides a reactor-loop main equipment installation method, comprising the steps of:
S1) preassembling a reactor pressure vessel, a reactor internal component, an inner sleeve, a steam generator and a main pump shell into a vessel module, and preassembling a reactor pressure vessel top cover, a control rod driving mechanism and a reactor top structure into a reactor top module;
s2) installing a main equipment bracket and a voltage stabilizer bracket;
S3) hoisting the container module to the main equipment bracket, adjusting the position of the container module, and installing the container module on the main equipment bracket; and
S4) installing a voltage stabilizer on the voltage stabilizer bracket, connecting a main pump motor and a hydraulic component with the main pump shell, and installing the pile top module on the container module.
According to one embodiment of the reactor-loop main installation method of the present invention, step S1) preassembling the container module comprises: and hoisting the reactor pressure vessel, the main pump shell and the steam generator into an adjusting rack in sequence, adjusting the positions, and then performing butt welding of the steam generator and the reactor pressure vessel filler neck, butt welding of the main pump adapter and the reactor pressure vessel filler neck, and stainless steel overlaying welding of the inner wall of the adapter.
According to one embodiment of the reactor-loop main equipment installation method of the present invention, step S1) is to pre-assemble the vessel module, and to suspend the deflector ring cavity assembly into the reactor pressure vessel for initial fixing prior to welding the reactor pressure vessel bottom head.
According to one embodiment of the reactor-loop main installation method of the present invention, the deflector ring cavity assembly is lowered to the bottom of the reactor pressure vessel for fixation while welding the vessel modules.
According to one embodiment of the reactor-loop main installation method of the present invention, step S1) preassembling the container module comprises: and hoisting the inner sleeve into the reactor pressure vessel for trial assembly, measuring the axial and circumferential positions, then machining and repairing, and installing a sealing element.
According to one embodiment of the reactor-loop main installation method of the present invention, step S1) preassembling the container module comprises: the method comprises the steps of splitting an in-pile shielding assembly into single shielding blocks outside a reactor pressure vessel, and fixedly connecting the shielding blocks with the upper part and the lower part of the reactor pressure vessel through supporting key pins after the shielding blocks are sequentially hung into the reactor pressure vessel and assembled into a whole inside the reactor pressure vessel.
According to one embodiment of the reactor-loop main equipment installation method of the present invention, step S1) in the preassembled container module, the in-pile components include an upper in-pile component and a lower in-pile component, the lower in-pile component is first lifted for multiple times, gap repair and measurement at the outlet nozzle of the hanging basket and the lower radial support key are completed, the installation of the lower in-pile component is completed, and then the centering and related gap distance inspection of the upper in-pile component and the lower in-pile component are completed by lifting the upper in-pile component for multiple times.
According to one embodiment of the reactor-loop main equipment installation method of the present invention, step S1) preassembling the roof module comprises: and installing the control rod driving mechanism on the reactor pressure vessel top cover, and installing a central part heat preservation layer on the reactor pressure vessel top cover in cooperation with a ventilation coaming of a reactor top structure.
According to one embodiment of the reactor-loop main equipment installation method of the present invention, the step S4) of voltage regulator installation includes: and hoisting the upper horizontal support of the voltage stabilizer to the installation position, welding and fixing, installing a skirt adjusting plate on the voltage stabilizer bracket, hoisting the voltage stabilizer to the installation position, and locking and connecting the voltage stabilizer and the voltage stabilizer bracket by adopting bolts.
According to one embodiment of the reactor-loop main installation method of the present invention, the step S4) of installing the voltage regulator further includes: and a plurality of sections of fluctuation pipes are pre-installed and connected on the pressure stabilizer, the welding and the hydraulic test of the fluctuation pipes are performed after the lengths of the pipe sections are matched according to the distance between the steam generator and the pressure stabilizer, and after the hydraulic test is qualified, the fluctuation pipes are respectively welded and connected with the pressure stabilizer and the hot section pipe nozzles of the steam generator.
Compared with the prior art, in the method for installing the primary equipment of the primary loop of the reactor, the reactor pressure vessel, the internal components of the reactor, the inner sleeve, the steam generator and the main pump shell are pre-assembled into the vessel module in the equipment assembly factory, the top cover of the reactor pressure vessel, the control rod driving mechanism and the top structure of the reactor are pre-assembled into the top module in the equipment assembly factory, and then the vessel module and the top module are transported to the installation site to finish final installation, so that the existing factory conditions of the equipment assembly factory can be fully utilized, the installation precision and the installation efficiency are improved, and the problem that the primary equipment of the primary loop of the reactor is difficult to be independently installed in the site with limited installation space is solved.
Drawings
The method for installing primary equipment of a primary loop of a reactor and the technical effects thereof are described in detail below with reference to the accompanying drawings and detailed description, wherein:
FIG. 1 is a flow chart of a method for installing primary equipment of a primary loop of a reactor according to the present invention.
Fig. 2 is a schematic structural view of a primary reactor-loop equipment assembled by the primary reactor-loop equipment installation method of the present invention.
In the figure:
10- -reactor pressure vessel; 100—an in-stack component; 102- -inner sleeve; 104—an in-stack shielding assembly; 106- -a deflector ring cavity assembly; 108- -a roof stacking structure; 110—a control rod drive mechanism; 20- -a steam generator; 30- -a main pump; 40- -a voltage stabilizer; 400- -a surge tube; 50- -a master device holder; 60- -a voltage regulator bracket.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is presented herein for purposes of illustration only and is not intended to limit the invention.
As shown in fig. 1, the present invention provides a method for installing a primary reactor loop apparatus, which includes the steps of:
s1) preassembling a reactor pressure vessel, a reactor internal component 100, an inner sleeve 102, a steam generator 20 and a main pump shell into a vessel module, and preassembling a reactor pressure vessel top cover, a control rod driving mechanism 110 and a reactor top structure 108 into a reactor top module;
s2) mounting the main device bracket 50 and the voltage regulator bracket 60;
S3) hoisting the container module to the main equipment bracket 50, adjusting the position of the container module, and installing the container module on the main equipment bracket 50; and
S4) the stabilizer 40 is mounted on the stabilizer bracket 60, the main pump motor and the hydraulic components are connected to the main pump housing, and the stack top module is mounted on the container module.
Specifically, step S1) of preassembling the container module includes:
Before the lower end enclosure of the reactor pressure vessel 10 is welded, the guide ring cavity assembly 106 is suspended into the reactor pressure vessel 10 for initial fixing, and at this time, the upper flange and the lower flange of the guide ring cavity assembly 106 are fixed on the inner wall of the reactor pressure vessel 10 through pins.
The reactor pressure vessel 10, the main pump shell and the steam generator 20 are sequentially hung on a special adjusting rack, an adjusting device for adjusting the position of equipment is arranged on the adjusting rack, and the adjusting device is connected with an equipment outer wall supporting key; 6 degrees of freedom of single equipment are adjusted, so that levelness and elevation of a reference mounting surface of the reactor pressure vessel 10 are guaranteed, and equipment connection pipe centering is guaranteed; after the adjustment is completed, the steam generator 20 is subjected to butt welding with the filler neck of the reactor pressure vessel 10, the connecting pipe of the main pump 30 is subjected to butt welding with the filler neck of the reactor pressure vessel 10, stainless steel overlaying welding is carried out on the inner wall of the connecting pipe, and the reactor pressure vessel 10, the main pump 30 and the steam generator 20 are formed into a whole, wherein when the whole vessel is assembled and welded, the diversion ring cavity assembly 106 is lowered to the bottom of the reactor pressure vessel 10 to be fixed.
The filler neck welding plug of the assembled container integral equipment system pipeline is plugged, and the main pump shell, the control rod driving mechanism sealing shell of the top cover part and the pile measuring connecting pipe are sealed by adopting a mechanical structure. In order to ensure the safety of the later nuclear power operation, a primary side integral hydraulic test needs to be implemented, the leakage condition of a primary side welding seam is checked, and the stress and deformation of key parts are measured.
The supporting foundation of the main equipment bracket 50 is formed by splicing and welding plates, the supporting seat at the upper part of the supporting foundation is matched with the external supporting key of the equipment, and after the hydraulic test of the main container module, the preassembly debugging of the container module and the reactor main equipment bracket 50 is implemented.
At this time, the deflector ring cavity assembly 106 at the lower portion of the reactor pressure vessel 10 is moved to the installation position, the upper and lower flange fixing pins are installed, and the upper and lower seals are welded, thereby completing the final installation of the deflector ring cavity assembly 106.
The inner sleeve 102 is hung into the reactor pressure vessel for trial assembly, the axial and circumferential positions are measured, then the inner sleeve is machined and repaired, and the seal is installed after the repair and final installation are performed.
The in-pile shielding assembly 104 is split into single shielding blocks outside the reactor, the shielding blocks are sequentially hung into the reactor pressure vessel 10, and the shielding blocks are fixedly connected with the upper supporting key pin and the lower supporting key pin of the reactor pressure vessel 10 after the inside of the reactor pressure vessel 10 is assembled into a whole.
Prior to installation, the internals 100 are divided into an upper internals and a lower internals. When the container module is preassembled, firstly, the lower internal components of the pile are lifted for a plurality of times, the equal gap repair and measurement of the outlet nozzle of the hanging basket and the radial support key of the lower part are completed, and the final installation of the lower internal components of the pile is completed; the final installation of the internals 100 is then completed by lifting the upper internals multiple times to complete the upper-lower centering and associated gap distance checks.
Specifically, step S1) of preassembling the roof module comprises:
The reactor pressure vessel top cover assembly is firstly provided with a control rod driving mechanism 110, a claw assembly is hung into a sealing shell to be installed in place, a driving rod stroke sleeve is hung into and connected with threads on the sealing shell, a small omega sealing weld joint is applied to a welding joint, after welding is qualified, a single-tube hydraulic test of the rod driving mechanism is carried out, and then the coil assembly, a rod position detector, a limit nut and a locking washer are installed.
The center of the upper part of the reactor pressure vessel roof is provided with a ventilation coaming which is matched with the reactor roof structure 108, and the coaming is connected with a top cover supporting table through bolts. The lower lifting appliance is connected with the top cover of the reactor pressure vessel through pins. And then, installing other ventilation components, impact-resistant supporting devices, cable bridges, upper lifting slings and the like to complete the assembly of the pile top module.
It will be appreciated that the preassembled container module and the preassembled roof module of step S1) may be performed simultaneously or sequentially in the equipment assembly plant; in addition, step S2) of installing the main equipment rack and the voltage regulator rack may be performed before, after, or simultaneously with the preassembling of the container module and the preassembled roof module.
Specifically, S2) mounting the main device bracket 50 and the regulator bracket 60 includes: the main equipment rack 50 and the individual pressurizer rack 60 are suspended into the reactor compartment and welded.
Specifically, S3) hoisting the container module to the main apparatus bracket 50, adjusting the container module position, and mounting the container module on the main apparatus bracket 50 includes: the container module is hoisted to the main equipment bracket 50 of the reactor cabin, the supporting key is hoisted to the supporting seat, the thickness of the horizontal adjusting plate of the supporting seat is adjusted, the thickness of the side adjusting plate is adjusted, and the adjustment of the final installation position of the container module is completed.
Specifically, S4) mounting the voltage regulator 40 on the voltage regulator bracket 60, and mounting the stack top module on the container module includes: the upper part of the voltage stabilizer 40 is horizontally supported and lifted to the installation position and welded and fixed, a skirt seat adjusting plate is installed on the voltage stabilizer bracket 60, the voltage stabilizer 40 is lifted to the installation position, and the voltage stabilizer 40 is locked and connected with the voltage stabilizer bracket 60 by bolts. Subsequently, the distance between the adjustable stop and the voltage regulator 40 is adjusted to ensure lateral support.
The multi-section fluctuation pipe 400 is pre-installed and connected on the pressure stabilizer 40, the welding and the hydraulic test of the fluctuation pipe 400 are carried out according to the distance between the steam generator 20 and the pressure stabilizer 40 after the pipe section length is tested, and after the hydraulic test is qualified, the fluctuation pipe 400 is respectively welded and connected with the pressure stabilizer 40 and the hot section nozzle of the steam generator 20. And then, installing the fluctuation tube support platform and the damper, and rotating and adjusting the angle and the length of the fluctuation tube support platform and the damper to finish the installation of the fluctuation tube support.
Specifically, S4) connecting the main pump motor and the hydraulic component with the main pump housing includes: the main pump motor and the hydraulic component are respectively hung on a main pump shell, a sealing piece is installed and mechanically fixed with a pump shell flange through bolts, and the hydraulic component mainly comprises an impeller and a guide vane.
Referring to fig. 2 in particular, a schematic structural view of a compact-type reactor-loop main apparatus assembled by the installation method of the present invention mainly includes a reactor pressure vessel 10, a steam generator 20, a main pump 30, a voltage stabilizer 40, and a reactor main apparatus bracket 50. The main apparatus centers on the reactor pressure vessel 10, and the steam generator 20 is symmetrically arranged with the main pump 30. The reactor pressure vessel 10 and the steam generator 20, and the reactor pressure vessel 10 and the main pump 30 are directly connected through equipment connection pipes, and no pipeline is connected between the steam generator 20 and the main pump 30.
An inner sleeve 102 is arranged in the equipment connecting pipe, a flow guide annular cavity assembly 106 is arranged in the reactor pressure vessel 10, a bidirectional flow channel in the equipment is formed, and circulation of reactor coolant in a loop is realized. The straight tube section on one side of the inner sleeve 102 is mechanically coupled to the deflector ring cavity assembly 106 and the other side is in socket-and-spigot engagement with the equipment elbow. The pressurizer 40 is connected to the hot leg annulus of the steam generator 20 by a surge tube 400. The main device is mounted on the main device holder 50 by means of external support keys.
The primary reactor-loop equipment assembled by the primary reactor-loop equipment assembling method of the invention has basically the same structure as the existing primary reactor-loop equipment, but the specific assembling process is different, so that each equipment or specific parts thereof involved in the primary reactor-loop equipment are not further described in detail in the specification.
As can be seen from the above detailed description of the embodiments of the present invention, in the installation method of the primary reactor loop equipment according to the present invention, compared with the prior art, the reactor pressure vessel 10, the in-pile member 104, the inner sleeve 102, the steam generator 20, and the main pump casing are pre-assembled into a vessel module in the equipment assembly plant, the reactor pressure vessel top cover, the control rod driving mechanism 110, and the top structure 108 are pre-assembled into a top module in the equipment assembly plant, and then the vessel module and the top module are transported to the installation site to complete final installation, thereby not only fully utilizing the existing factory conditions of the equipment assembly plant and improving the installation accuracy and the installation efficiency, but also overcoming the problem that the primary reactor loop equipment cannot be installed independently on the site with limited installation space, and being particularly suitable for installation of the primary reactor loop equipment in a compact type reactor.
The present invention is also capable of suitable alterations and modifications in the above-described embodiments, in light of the above principles. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (9)
1. A method of installing a primary reactor loop, comprising the steps of:
S1) preassembling a reactor pressure vessel, a reactor internal component, an inner sleeve, a steam generator and a main pump shell into a vessel module, preassembling a reactor pressure vessel top cover, a control rod driving mechanism and a reactor top structure into a reactor top module, wherein the preassembled vessel module comprises: sequentially hanging the reactor pressure vessel, the main pump shell and the steam generator on an adjusting rack and adjusting the positions, and then performing butt welding of the steam generator and a reactor pressure vessel filler neck, butt welding of a main pump adapter and a reactor pressure vessel filler neck, and stainless steel overlaying welding of the inner wall of the adapter;
s2) installing a main equipment bracket and a voltage stabilizer bracket;
S3) hoisting the container module to the main equipment bracket, adjusting the position of the container module, and installing the container module on the main equipment bracket; and
S4) installing a voltage stabilizer on the voltage stabilizer bracket, connecting a main pump motor and a hydraulic component with the main pump shell, and installing the pile top module on the container module.
2. The reactor-loop main equipment installation method of claim 1, wherein step S1) is performed by pre-assembling the vessel module and then suspending the deflector ring cavity assembly into the reactor pressure vessel for initial fixing prior to welding the reactor pressure vessel bottom head.
3. The reactor-loop main equipment installation method of claim 2, wherein the deflector ring cavity assembly is lowered to the bottom of the reactor pressure vessel for securement while welding the vessel modules.
4. The reactor-loop master installation method according to claim 1, wherein step S1) of preassembling the container module comprises: and hoisting the inner sleeve into the reactor pressure vessel for trial assembly, measuring the axial and circumferential positions, then machining and repairing, and installing a sealing element.
5. The reactor-loop master installation method according to claim 1, wherein step S1) of preassembling the container module comprises: the method comprises the steps of splitting an in-pile shielding assembly into single shielding blocks outside a reactor pressure vessel, and fixedly connecting the shielding blocks with the upper part and the lower part of the reactor pressure vessel through supporting key pins after the shielding blocks are sequentially hung into the reactor pressure vessel and assembled into a whole inside the reactor pressure vessel.
6. The reactor-loop main equipment installation method according to claim 1, wherein in step S1), in the preassembled container module, the in-pile components include an upper in-pile component and a lower in-pile component, the lower in-pile component is first lifted multiple times, gap repair and measurement at a nacelle outlet nozzle and a lower radial support key are completed, the installation of the lower in-pile component is completed, and then after the centering and related gap distance inspection of the upper in-pile component and the lower in-pile component are completed by lifting the upper in-pile component multiple times.
7. The reactor-loop master installation method according to claim 1, wherein step S1) of preassembling the stack top module comprises: and installing the control rod driving mechanism on the reactor pressure vessel top cover, and installing a central part heat preservation layer on the reactor pressure vessel top cover in cooperation with a ventilation coaming of a reactor top structure.
8. The reactor-loop main equipment installation method according to claim 1, wherein the step S4) of voltage regulator installation includes: and hoisting the upper horizontal support of the voltage stabilizer to the installation position, welding and fixing, installing a skirt adjusting plate on the voltage stabilizer bracket, hoisting the voltage stabilizer to the installation position, and locking and connecting the voltage stabilizer and the voltage stabilizer bracket by adopting bolts.
9. The reactor-loop master installation method according to claim 8, wherein the step S4) of voltage regulator installation further comprises: and a plurality of sections of fluctuation pipes are pre-installed and connected on the pressure stabilizer, the welding and the hydraulic test of the fluctuation pipes are performed after the lengths of the pipe sections are matched according to the distance between the steam generator and the pressure stabilizer, and after the hydraulic test is qualified, the fluctuation pipes are respectively welded and connected with the pressure stabilizer and the hot section pipe nozzles of the steam generator.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111298142.7A CN114171224B (en) | 2021-11-04 | Method for installing primary equipment of primary loop of reactor | |
| PCT/CN2022/129960 WO2023078412A1 (en) | 2021-11-04 | 2022-11-04 | Reactor primary circuit main device installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111298142.7A CN114171224B (en) | 2021-11-04 | Method for installing primary equipment of primary loop of reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114171224A CN114171224A (en) | 2022-03-11 |
| CN114171224B true CN114171224B (en) | 2024-11-12 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736925A (en) * | 2007-09-27 | 2010-06-16 | 中国核工业二三建设有限公司 | Modular construction method for nuclear island of nuclear power station |
| CN108922643A (en) * | 2018-07-20 | 2018-11-30 | 中广核研究院有限公司 | A kind of small-sized heap reactor-loop overall structure of compact Layout |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736925A (en) * | 2007-09-27 | 2010-06-16 | 中国核工业二三建设有限公司 | Modular construction method for nuclear island of nuclear power station |
| CN108922643A (en) * | 2018-07-20 | 2018-11-30 | 中广核研究院有限公司 | A kind of small-sized heap reactor-loop overall structure of compact Layout |
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