CN115132382B - Reactor internals adopting split upper part compression structure - Google Patents
Reactor internals adopting split upper part compression structure Download PDFInfo
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- CN115132382B CN115132382B CN202210799492.XA CN202210799492A CN115132382B CN 115132382 B CN115132382 B CN 115132382B CN 202210799492 A CN202210799492 A CN 202210799492A CN 115132382 B CN115132382 B CN 115132382B
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- 230000006835 compression Effects 0.000 title claims abstract description 76
- 238000007906 compression Methods 0.000 title claims abstract description 76
- 239000002826 coolant Substances 0.000 claims abstract description 32
- 238000003825 pressing Methods 0.000 claims description 19
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 22
- 238000005192 partition Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/028—Seals, e.g. for pressure vessels or containment vessels
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/06—Sealing-plugs
- G21C13/073—Closures for reactor-vessels, e.g. rotatable
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/12—Means for moving control elements to desired position
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nuclear reactor structural design applied to nuclear power stations, and particularly relates to a reactor inner member adopting a split-type upper compression structure, wherein after the split-type upper compression structure is adopted, the lower control rod guide assembly of the reactor inner member can be quickly disassembled and replaced, so that the step of replacing the lower control rod guide assembly is greatly simplified, the replacement difficulty is reduced, and the replacement time is shortened. The annular compression spring is arranged on the split flow partition plate, the annular compression spring can axially compress the inner member of the reactor, after the annular compression spring is compressed and deformed, the upper end face and the lower end face form sealing surfaces, the reactor inlet coolant and the reactor outlet coolant can be separated, the sealing rings are not required to be arranged independently for separating the coolant, the operation of replacing the sealing rings is omitted, and the structural composition of the inner member of the reactor is simplified.
Description
Technical Field
The invention belongs to the technical field of nuclear reactor structural design applied to nuclear power stations, and particularly relates to a split type upper compression structure of a reactor internal component and the reactor internal component adopting the split type upper compression structure.
Background
In a nuclear reactor structure for a nuclear power plant, a split-flow separator is fixed in a pressure vessel for introducing a reactor inlet coolant from a lower end of a pressure vessel nipple and extracting a reactor outlet coolant from an upper end of the pressure vessel nipple. It is often desirable to provide a dedicated large diameter seal element between the reactor internals and the split diaphragms to achieve separation of the reactor inlet coolant and the reactor outlet coolant within the nuclear reactor. The top of the reactor inner member is provided with an annular compression spring, and the annular compression spring is compressed when the nuclear reactor is installed, so that the axial compression of the reactor inner member is realized. The use of sealing elements is affected by the axial compression force, and after a certain period of operation of the nuclear reactor, the sealing elements need to be replaced during the reactor refueling, the time for replacing the sealing elements is long, the operation difficulty is high, and the irradiation dose of personnel responsible for replacement is high.
The pressure vessel barrel section of this type of nuclear reactor structure is long, so the upper pressing structure of the in-pile member is also long, and the precision of the control rod guide assembly installed in the upper pressing structure is high. For manufacturing, can only divide into upper control rod guide assembly and lower control rod guide assembly two parts, all install in upper portion compact structure, if lower control rod guide assembly appears damaging and need be changed, need take out all upper control rod guide assemblies, dismantle the upper supporting plate of upper portion compact structure, change lower control rod guide assembly again, the operation process is loaded down with trivial details, and the degree of difficulty of dismantling and reinstalling the upper supporting plate of upper portion compact structure is big, operating time is long.
Disclosure of Invention
Based on the structure, the reactor internal component adopting the split type upper compression structure is designed, the upper compression structure is separated into an upper component and a lower component, the upper control rod guide component is arranged in the upper component, the lower control rod guide component is arranged in the lower component, and the upper component and the lower component can be separated and loosened, so that the lower control rod guide component can be directly replaced conveniently.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the split type upper compression structure of the reactor internals comprises an upper assembly and a lower assembly, wherein the upper control rod guide assembly is arranged in the upper assembly, the lower control rod guide assembly is arranged in the lower assembly, and the upper assembly and the lower assembly are connected in a separable manner. The upper pressing structure is of a split structure and can be separated into an upper assembly and a lower assembly, wherein the upper control rod guide assembly is arranged in the upper assembly, and the lower control rod guide assembly is arranged in the lower assembly. The upper component and the lower component of the upper compression structure can be connected in a long distance to realize the common loading and unloading of the pressure vessel, thereby saving the operation time; the upper assembly and the lower assembly of the upper pressing structure can be separated and loosened remotely so as to be convenient for directly replacing the lower control rod guide assembly.
As the preferable scheme of upper portion compress tightly structure, upper portion subassembly includes upper portion subassembly barrel, and lower part subassembly includes lower part subassembly barrel, and lower flange screw has been seted up to upper portion subassembly barrel bottom, and lower flange screw has been seted up at lower part subassembly barrel top, and lower flange screw and upper flange screw dock each other and realize separable connection between upper portion subassembly and the lower part subassembly.
As the preferable scheme of upper portion compress tightly structure, lower part subassembly barrel top sets up the locating pin, and upper part subassembly barrel bottom sets up flange pinhole under the upper part subassembly, and flange pinhole corresponds with the locating pin position under the upper part subassembly.
As the preferable scheme of upper portion compress tightly structure, upper portion subassembly includes upper portion subassembly upper plate and upper portion subassembly hypoplastron, and upper portion subassembly upper plate is installed in upper portion subassembly barrel upper portion opening part, and upper portion subassembly hypoplastron is installed in upper portion subassembly barrel lower portion opening part, sets up the through-hole of installing upper portion control rod guide assembly on upper portion subassembly upper plate and the upper portion subassembly hypoplastron in pairs.
As the preferable scheme of upper portion compress tightly structure, all set up the through-hole that corresponds with lower flange screw position on upper portion subassembly upper plate and the upper portion subassembly hypoplastron, pass upper portion subassembly upper plate, upper portion subassembly hypoplastron, lower flange screw, upper flange screw in proper order through connecting screw and realize separable connection between upper portion subassembly and the lower part subassembly.
As the preferable scheme of upper portion compress tightly structure, the lower part subassembly includes lower part subassembly upper plate and lower part subassembly hypoplastron, and lower part subassembly upper plate is installed in lower part subassembly barrel upper portion opening part, and lower part subassembly hypoplastron is installed in lower part subassembly barrel lower part opening part, sets up the through-hole of installing lower part control rod guide assembly on lower part subassembly upper plate and the lower part subassembly hypoplastron in pairs.
As a preferable scheme of the upper compression structure, a through hole for the coolant at the outlet of the reactor to circulate is formed on the side wall of the upper assembly barrel.
The reactor internals comprise the upper compression structure, a lower hanging basket structure and an annular compression spring; the upper portion compression structure is installed in lower part hanging flower basket structure open-top, and lower part hanging flower basket structure includes lower part hanging flower basket structure barrel, and lower part hanging flower basket structure barrel lateral wall outside sets up lower part hanging flower basket structure middle part flange step, and lower part hanging flower basket structure barrel passes in the through-hole of reposition of redundant personnel baffle major diameter from the top, and annular compression spring is located between lower part hanging flower basket structure middle part flange step and the reposition of redundant personnel baffle. The inner pile component mainly comprises an upper compression structure, a lower hanging basket structure and an annular compression spring, wherein the annular compression spring is arranged on a split flow baffle plate in a pressure vessel, so that the function of axially compressing the inner pile component by the annular compression spring after the top cover of the pressure vessel of the reactor is arranged is realized; and the upper end and the lower end of the annular compression spring are utilized to form sealing surfaces, so that the reactor inlet coolant and the reactor outlet coolant are separated, an independent sealing element is not required to be arranged, and the cost and the time for replacing the sealing element are saved.
As the preferable scheme of the reactor internals, the annular pressing spring upper surface and the annular pressing spring lower surface of the annular pressing spring are respectively provided with annular bulges, and the annular bulges on the upper surface and the lower surface are respectively positioned at the inner side and the outer side or the inner side and the outer side of the annular pressing spring.
As a preferable scheme of the reactor internal components, a retainer ring for accommodating the annular compression spring is arranged at the periphery of the large-diameter through hole of the split flow baffle plate.
As a preferred embodiment of the reactor internals, the internals are mounted in a pressure vessel cylinder, which are compressed by the pressure vessel head acting on the upper compression structure.
As a preferred solution of the reactor internals, the lower basket structure comprises a lower basket structure bottom plate provided with through holes for the passage of the reactor inlet coolant.
In summary, compared with the prior art, the invention has the following advantages and beneficial effects:
the split type upper pressing structure is divided into an upper component and a lower component, a control rod guide component arranged in the upper pressing structure is also divided into an upper control rod guide component and a lower control rod guide component, radial positioning of the upper component and the lower component of the upper pressing structure is realized through a plurality of positioning pins uniformly distributed along the circumferential direction, and the upper component is accurately arranged above the lower component through guiding positioning of the positioning pins. The same radial arrangement position of the lower flange of the upper assembly and the upper flange of the lower assembly is provided with a plurality of complete threaded holes simultaneously along the circumferential direction, so that a connecting screw rod can penetrate through a through hole of the upper assembly and is connected with the lower flange of the upper assembly and the threaded holes of the upper flange of the lower assembly, the upper assembly and the lower assembly are connected into a whole, the integral hanging-in and hanging-out of the pressure vessel of the upper compression structure is realized, the upper assembly of the upper compression structure can be disassembled, and the lower control rod guide assembly in the lower assembly is detached and replaced.
The annular compression spring is arranged on the split flow baffle plate in the pressure vessel instead of the top of the reactor inner member, a flange step is added in the middle of the hanging basket assembly, after the hanging basket assembly is axially compressed, the upper surface and the lower surface of the annular compression spring are compressed to form an upper sealing surface and a lower sealing surface, separation of the reactor inlet coolant and the reactor outlet coolant is realized, a sealing element is not required to be arranged on the split flow baffle plate, the step and the cost for replacing the sealing element are saved, and the operation steps of the reactor during the material changing are simplified.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention.
Fig. 1 is a view of an in-stack component.
Fig. 2 is a view of an upper pressing structure of the in-pile member.
Fig. 3 is a diagram of the upper assembly of the upper press structure.
Fig. 4 is a lower assembly view of the upper compression structure.
Fig. 5 is a view showing the structure of the lower basket.
Fig. 6 is a view of a ring-shaped hold-down spring.
Fig. 7 is a connection diagram of an upper assembly and a lower assembly of the upper compression structure.
Fig. 8 is a view of the installation of the annular hold-down spring on the shunt separator plate.
Fig. 9 is a schematic view of a lower basket structure compression ring compression spring.
Fig. 10 is a schematic view of the loading of the internals (upper and lower components of the upper compaction structure connected as a unit) into a pressure vessel.
FIG. 11 is a schematic flow diagram of the reactor inlet coolant and the reactor outlet coolant after the pressure vessel header is installed.
Fig. 12 is an enlarged view a of fig. 11.
Reference numerals and corresponding part names: 1-an upper compression structure; 2-a lower basket structure; 3-an annular compression spring; 4-upper assembly; 5-a lower assembly; 6-an upper control rod guide assembly; 7-a lower control rod guide assembly; 8-a locating pin; 9-lower flange screw holes; 10-upper flange screw holes; 11-upper assembly upper plate; 12-an upper assembly barrel; 13-upper assembly lower plate; 14-upper assembly lower flange pin aperture; 15-lower assembly upper plate; 16-a lower assembly cylinder; 17-a lower assembly lower plate; 18-a lower basket structural cylinder; 19-a lower basket structural bottom plate; 20-a flange step in the middle of the lower hanging basket structure; 21-the upper surface of the annular compression spring; 22-the lower surface of the annular compression spring; 23-connecting a screw; 24-a split-flow separator; 25-a pressure vessel cylinder; 26-pressure vessel top cover; 27-reactor inlet coolant; 28-reactor outlet coolant.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the principles and features of the present invention will be described in further detail below with reference to the examples and the accompanying drawings, and the exemplary embodiments of the present invention and the descriptions thereof are only for explaining the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "high", "low", "inner", "outer", "center", "length", "peripheral side", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention.
The terms used in the present specification are those general terms that are currently widely used in the art in view of the functions of the present disclosure, but may vary according to the intention, precedent, or new technology in the art of the person of ordinary skill in the art. Furthermore, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Accordingly, the terms used in the specification should not be construed as simple names, but rather based on the meanings of the terms and the general description of the present disclosure.
Example 1
The embodiment discloses a split type upper portion compacting structure 1 of reactor internals, as shown in fig. 2, is divided into an upper portion assembly 4 and a lower portion assembly 5, and the control rod guiding assembly is divided into an upper control rod guiding assembly 6 and a lower control rod guiding assembly 7, wherein the upper control rod guiding assembly 6 is installed in the upper portion assembly 4, the lower control rod guiding assembly 7 is installed in the lower portion assembly 5, and the upper portion assembly 4 is detachably connected with the lower portion assembly 5. The upper pressing structure 1 is a split structure and can be separated into an upper assembly 4 and a lower assembly 5, an upper control rod guide assembly 6 is arranged in the upper assembly 4, and a lower control rod guide assembly 7 is arranged in the lower assembly 5. The upper component 4 and the lower component 5 of the upper compression structure 1 can be connected in a long distance to realize the common loading and unloading of the pressure vessel, thereby saving the operation time; the upper assembly 4 and the lower assembly 5 of the upper press 1 can also be separated and released remotely to facilitate the direct replacement of the lower control rod guide assembly 7.
As an alternative embodiment of the upper pressing structure 1, as shown in fig. 2, the upper component 4 includes an upper component cylinder 12, the lower component 5 includes a lower component cylinder 16, a lower flange screw hole 9 is formed at the bottom of the upper component cylinder 12, a flange screw hole 10 is formed at the top of the lower component cylinder 16, and the lower flange screw hole 9 and the upper flange screw hole 10 are butted with each other to realize separable connection between the upper component 4 and the lower component 5. The lower flange screw hole 9 and the upper flange screw hole 10 are continuous threads processed simultaneously.
As an alternative embodiment of the upper pressing structure 1, as shown in fig. 2, a positioning pin 8 is disposed at the top of the lower assembly cylinder 16, an upper assembly lower flange pin hole 14 is disposed at the bottom of the upper assembly cylinder 12, and the upper assembly lower flange pin hole 14 corresponds to the positioning pin 8 in position. A plurality of locating pins 8 mounted on the lower assembly 5 are inserted into upper assembly lower flange pin holes 14 of the upper assembly 4 to radially limit the upper assembly 4 and achieve one-to-one alignment of the upper control rod guide assemblies 6 and the lower control rod guide assemblies 7.
As an alternative embodiment of the upper pressing structure 1, as shown in fig. 3, the upper assembly 4 includes an upper assembly upper plate 11 and an upper assembly lower plate 13, the upper assembly upper plate 11 is installed at an upper opening of the upper assembly cylinder 12, the upper assembly lower plate 13 is installed at a lower opening of the upper assembly cylinder 12, and through holes for installing the upper control rod guide assemblies 6 are provided in pairs on the upper assembly upper plate 11 and the upper assembly lower plate 13.
As an alternative embodiment of the upper pressing structure 1, as shown in fig. 7, through holes corresponding to the positions of the lower flange screw holes 9 are formed in the upper assembly upper plate 11 and the upper assembly lower plate 13, and the upper assembly 4 and the lower assembly 5 are detachably connected by sequentially passing through the upper assembly upper plate 11, the upper assembly lower plate 13, the lower flange screw holes 9 and the upper flange screw holes 10 through connecting screws 23. Screw holes are machined at the same circumferential arrangement positions of the upper component 4 and the lower component 5 of the upper compression structure 1 along the axial direction, and the upper component 4 and the lower component 5 are quickly connected into a whole through the cooperation of the connecting screw 23 and the screw holes.
As an alternative embodiment of the upper pressing structure 1, as shown in fig. 4, the lower assembly 5 includes a lower assembly upper plate 15 and a lower assembly lower plate 17, the lower assembly upper plate 15 is installed at an upper opening of the lower assembly cylinder 16, the lower assembly lower plate 17 is installed at a lower opening of the lower assembly cylinder 16, and through holes for installing the lower control rod guide assemblies 7 are provided in pairs on the lower assembly upper plate 15 and the lower assembly lower plate 17.
As an alternative embodiment of the upper packing structure 1, as shown in fig. 3 and 11, the side wall of the upper module cylinder 12 is provided with a through hole through which the reactor outlet coolant 28 flows.
In summary, this embodiment adopts split type upper portion to compress tightly structure 1 in the reactor internals, upper portion compress tightly structure 1 split is installed upper portion subassembly 4 of upper portion control rod guide assembly 6 and is installed lower part subassembly 5 of lower part control rod guide assembly 7, upper portion subassembly 4 and lower part subassembly 5 can connect and separate, can realize upper portion compress tightly structure 1's integral erection and hang out, be convenient for again change lower part control rod guide assembly 7 of lower part subassembly 5, realize the quick dismantlement and the change to lower part control rod guide assembly 7 of reactor internals, the step of changing lower part control rod guide assembly 7 has been simplified greatly, the change degree of difficulty has been reduced, and the change time has been shortened.
Example 2
The embodiment discloses a reactor internals, as shown in fig. 1, comprising an upper compression structure 1, a lower basket structure 2 and an annular compression spring 3 as described in embodiment 1; the upper compression structure 1 is mounted in the top opening of the lower basket structure 2, and the lower basket structure 2 is suspended into the pressure vessel cylinder 25. As shown in fig. 5, the lower basket structure 2 comprises a lower basket structure cylinder 18, and a flange step 20 in the middle of the lower basket structure is arranged outside the side wall of the lower basket structure cylinder 18, so as to axially compress the annular compression spring 3 mounted on the split-flow partition 24, and the upper surface and the lower surface of the annular compression spring 3 form sealing surfaces after being compressed. As shown in fig. 10, the lower basket structural cylinder 18 passes through the large-diameter through hole of the flow dividing partition plate 24 from above, and as shown in fig. 8 and 9, the annular compression spring 3 is positioned between the lower basket structural middle flange step 20 and the flow dividing partition plate 24. The internal pile component mainly comprises an upper compression structure 1, a lower hanging basket structure 2 and an annular compression spring 3, wherein the annular compression spring 3 is arranged on a split-flow baffle 24 in a pressure vessel cylinder 25, so that the function of axially compressing the internal pile component by the annular compression spring 3 after the top cover 26 of the reactor pressure vessel is arranged is realized; and the upper end and the lower end of the annular compression spring 3 are utilized to form sealing surfaces, so that the reactor inlet coolant 27 and the reactor outlet coolant 28 are separated, a separate sealing element is not required, and the cost and time for replacing the sealing element are saved.
As an alternative embodiment of the reactor internals, as shown in fig. 6 and 12, the annular compression spring upper surface 21 and the annular compression spring lower surface 22 of the annular compression spring 3 are respectively provided with annular protrusions, and the annular protrusions of the upper and lower surfaces are respectively located at the inner side and the outer side or the inner side and the outer side of the annular compression spring 3. As shown in fig. 12, after the annular compression spring 3 is compressed, the upper surface 21 of the annular compression spring is attached to the flange step 20 in the middle of the lower basket structure to form a sealing boundary, the reactor outlet coolant 28 is isolated above the split-flow partition plate 24, the lower surface 22 of the annular compression spring is attached to the split-flow partition plate 24 to form a sealing boundary, and the reactor inlet coolant 27 is isolated below the split-flow partition plate 24, so that the separation of the reactor inlet coolant 27 and the reactor outlet coolant 28 is realized.
As an alternative embodiment of the reactor internals, as shown in fig. 8 and 12, the split-flow separator 24 is provided with a collar around the large diameter through-hole which accommodates the annular hold-down spring 3.
As an alternative embodiment of the reactor internals, as shown in fig. 11, the internals are mounted in a pressure vessel cylinder 25 which is compressed by a pressure vessel top cover 26 acting on the upper compression structure 1. After the pressure vessel head 26 is installed, the annular hold-down springs 3 are compressed downwardly by the upper hold-down structure 1 and the lower basket structure 2, and the annular hold-down springs 3 supported on the split diaphragms 24 separate the reactor inlet coolant 27 from the reactor outlet coolant 28 after being compressed.
As an alternative embodiment of the reactor internals, as shown in fig. 5 and 11, the lower basket structure 2 comprises a lower basket structure bottom plate 19, and the lower basket structure bottom plate 19 is provided with through holes for the passage of the reactor inlet coolant 27.
In conclusion, the annular compression spring 3 is arranged between the flange step 20 and the split flow baffle 24 in the middle part of the lower hanging basket structure in the reactor internals, and the annular compression spring 3 can axially compress the reactor internals to axially compress the reactor internals; after the annular compression spring 3 is deformed under pressure, the upper end face and the lower end face form sealing surfaces, the reactor inlet coolant 27 and the reactor outlet coolant 28 can be separated, a sealing ring is not required to be arranged independently for separating the coolant, the operation of replacing the sealing ring is omitted, and the structural composition of the components in the reactor is simplified.
The foregoing detailed description of the preferred embodiments has been presented for purposes of illustration and description, and it is to be understood that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, equivalents, alternatives, and improvements within the spirit and principles of the invention.
Claims (10)
1. Split upper compression structure (1) of a reactor internals, characterized in that: the device comprises an upper component (4) and a lower component (5), wherein an upper control rod guide component (6) is arranged in the upper component (4), a lower control rod guide component (7) is arranged in the lower component (5), and the upper component (4) is detachably connected with the lower component (5); the upper assembly (4) comprises an upper assembly barrel (12), the lower assembly (5) comprises a lower assembly barrel (16), a lower flange screw hole (9) is formed in the bottom of the upper assembly barrel (12), a flange screw hole (10) is formed in the top of the lower assembly barrel (16), and the lower flange screw hole (9) and the upper flange screw hole (10) are in butt joint with each other to realize separable connection between the upper assembly (4) and the lower assembly (5); the top of the lower assembly barrel (16) is provided with a locating pin (8), the bottom of the upper assembly barrel (12) is provided with an upper assembly lower flange pin hole (14), and the upper assembly lower flange pin hole (14) corresponds to the locating pin (8).
2. The upper compression structure (1) according to claim 1, characterized in that: the upper assembly (4) comprises an upper assembly upper plate (11) and an upper assembly lower plate (13), the upper assembly upper plate (11) is installed at the upper opening of the upper assembly barrel (12), the upper assembly lower plate (13) is installed at the lower opening of the upper assembly barrel (12), and through holes for installing the upper control rod guide assemblies (6) are formed in the upper assembly upper plate (11) and the upper assembly lower plate (13) in pairs.
3. The upper compression structure (1) according to claim 2, characterized in that: through holes corresponding to the positions of the lower flange screw holes (9) are formed in the upper assembly upper plate (11) and the upper assembly lower plate (13), and the upper assembly upper plate (11), the upper assembly lower plate (13), the lower flange screw holes (9) and the upper flange screw holes (10) sequentially penetrate through the connecting screw rods (23) to realize separable connection between the upper assembly (4) and the lower assembly (5).
4. The upper compression structure (1) according to claim 1, characterized in that: the lower assembly (5) comprises a lower assembly upper plate (15) and a lower assembly lower plate (17), the lower assembly upper plate (15) is arranged at the upper opening of the lower assembly barrel (16), the lower assembly lower plate (17) is arranged at the lower opening of the lower assembly barrel (16), and through holes for arranging the lower control rod guide assemblies (7) are formed in the lower assembly upper plate (15) and the lower assembly lower plate (17) in pairs.
5. The upper compression structure (1) according to claim 1, characterized in that: the side wall of the upper assembly barrel (12) is provided with a through hole for the reactor outlet coolant (28) to circulate.
6. Reactor internals, characterized by: comprising an upper compression structure (1) as claimed in any one of claims 1-5, and a lower basket structure (2) and an annular compression spring (3); the upper portion compresses tightly structure (1) and installs in lower part hanging flower basket structure (2) open-top, and lower part hanging flower basket structure (2) include lower part hanging flower basket structure barrel (18), and lower part hanging flower basket structure barrel (18) lateral wall outside sets up lower part hanging flower basket structure middle part flange step (20), and in lower part hanging flower basket structure barrel (18) passed reposition of redundant personnel baffle (24) major diameter through-hole from the top, annular compression spring (3) were located between lower part hanging flower basket structure middle part flange step (20) and reposition of redundant personnel baffle (24).
7. The reactor internals of claim 6 wherein: the upper surface (21) and the lower surface (22) of the annular compression spring (3) are respectively provided with annular protrusions, and the annular protrusions on the upper surface and the lower surface are respectively positioned at the inner side and the outer side or the inner side of the annular compression spring (3).
8. The reactor internals of claim 7 wherein: the periphery of the large-diameter through hole of the shunt separator (24) is provided with a retainer ring for accommodating the annular compression spring (3).
9. The reactor internals of claim 6 wherein: the internal components are mounted in a pressure vessel cylinder (25) and are pressed by a pressure vessel top cover (26) acting on the upper pressing structure (1).
10. The reactor internals of claim 6 wherein: the lower basket structure (2) comprises a lower basket structure bottom plate (19), and through holes for the reactor inlet coolant (27) to circulate are formed in the lower basket structure bottom plate (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210799492.XA CN115132382B (en) | 2022-07-08 | 2022-07-08 | Reactor internals adopting split upper part compression structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210799492.XA CN115132382B (en) | 2022-07-08 | 2022-07-08 | Reactor internals adopting split upper part compression structure |
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| CN115132382A CN115132382A (en) | 2022-09-30 |
| CN115132382B true CN115132382B (en) | 2024-01-26 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1917095A (en) * | 2005-08-19 | 2007-02-21 | 中国核动力研究设计院 | Shell type reactor in normal presure and low temperature |
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| CN115132382A (en) | 2022-09-30 |
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