CN115132382A - Reactor internal member adopting split type upper portion compression structure - Google Patents
Reactor internal member adopting split type upper portion compression structure Download PDFInfo
- Publication number
- CN115132382A CN115132382A CN202210799492.XA CN202210799492A CN115132382A CN 115132382 A CN115132382 A CN 115132382A CN 202210799492 A CN202210799492 A CN 202210799492A CN 115132382 A CN115132382 A CN 115132382A
- Authority
- CN
- China
- Prior art keywords
- assembly
- plate
- reactor
- internals
- control rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006835 compression Effects 0.000 title claims description 26
- 238000007906 compression Methods 0.000 title claims description 26
- 238000005056 compaction Methods 0.000 claims abstract description 35
- 239000002826 coolant Substances 0.000 claims abstract description 32
- 238000005192 partition Methods 0.000 claims description 16
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 22
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000012856 packing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process 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
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- 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)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nuclear reactor structural design applied to nuclear power stations, and particularly designs a reactor internals adopting a split type upper compaction structure, after the upper compaction structure adopts the split type, the quick disassembly and replacement of a lower control rod guide assembly of the internals can be realized, the step of replacing the lower control rod guide assembly is greatly simplified, the replacement difficulty is reduced, and the replacement time is shortened. This reactor internals installs annular pressure spring on the reposition of redundant personnel baffle, and annular pressure spring can the axial compress tightly internals, and after annular pressure spring pressurized deformation, the terminal surface has formed sealed face about can separating reactor inlet coolant and reactor outlet coolant again, need not set up the sealing ring alone and carry out the separation of coolant, has saved the operation of changing the sealing ring, has simplified the structural component of internals.
Description
Technical Field
The invention belongs to the technical field of nuclear reactor structural design of nuclear power stations, and particularly relates to a split type upper part compression structure of a reactor internal component and the reactor internal component adopting the split type upper part compression structure.
Background
In a nuclear reactor structure for a nuclear power station, a flow dividing partition plate is fixed in a pressure vessel and used for leading in a reactor inlet coolant from the lower end of a pressure vessel connecting pipe and leading out a reactor outlet coolant from the upper end of the pressure vessel connecting pipe. It is often necessary to provide a dedicated large diameter sealing element between the reactor internals and the splitter plate to achieve separation of the reactor inlet coolant and the reactor outlet coolant within the nuclear reactor. The top of the reactor internals is provided with an annular compression spring, and when the nuclear reactor is installed, the annular compression spring can be compressed to realize the axial compression of the reactor internals. The use of the sealing element is influenced by the axial pressing force, the sealing element needs to be replaced during the reactor refueling after the nuclear reactor operates for a period of time, the time for replacing the sealing element is long, the operation difficulty is high, and the irradiation dose of personnel responsible for replacement is high.
The pressure vessel cylinder section of the nuclear reactor structure is longer, so the upper compaction structure of the reactor internals is also longer, and the precision of the control rod guide assembly installed in the upper compaction structure is higher. For manufacturing conveniently, can only be divided into upper portion control rod guide subassembly and lower part control rod guide subassembly two parts, all install in upper portion compact structure, if damage appears in lower part control rod guide subassembly and needs to be changed, all upper portion control rod guide subassemblies need be taken out, dismantle upper portion compact structure's upper support plate, change lower part control rod guide subassembly again, the operation process is loaded down with trivial details, the degree of difficulty of dismantling and reinstalling the upper support plate of upper portion compact structure is big, operating time is long.
Disclosure of Invention
Based on the above, the invention designs the reactor internals adopting the split type upper compaction structure, the upper compaction structure is separated into an upper assembly and a lower assembly, the upper control rod guide assembly is installed in the upper assembly, the lower control rod guide assembly is installed in the lower assembly, and the upper assembly and the lower assembly can be separated and loosened, so that the lower control rod guide assembly is convenient to directly replace.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the split type upper compaction structure of the reactor internals comprises an upper assembly and a lower assembly, wherein an upper control rod guide assembly is installed in the upper assembly, a lower control rod guide assembly is installed in the lower assembly, and the upper assembly is detachably connected with the lower assembly. The upper part compact structure is a split type structure and can be separated into an upper part assembly and a lower part assembly, the upper part control rod guide assembly is installed in the upper part assembly, and the lower part control rod guide assembly is installed in the lower part assembly. The upper assembly and the lower assembly of the upper compaction structure can be remotely connected to realize the common loading and unloading of the pressure vessel, so that the operation time is saved; the upper and lower assemblies of the upper hold down structure can also be remotely separated for release to facilitate direct replacement of the lower control rod guide assembly.
As the preferable scheme of the upper part pressing structure, the upper part assembly comprises an upper part assembly cylinder, the lower part assembly comprises a lower part assembly cylinder, a lower flange screw hole is formed in the bottom of the upper part assembly cylinder, a flange screw hole is formed in the top of the lower part assembly cylinder, and the lower flange screw hole and the upper flange screw hole are mutually butted to realize the separable connection between the upper part assembly and the lower part assembly.
As the preferred scheme of the upper portion compact structure, the top of the lower component cylinder body is provided with a positioning pin, the bottom of the upper component cylinder body is provided with an upper component lower flange pin hole, and the upper component lower flange pin hole corresponds to the positioning pin in position.
As a preferable scheme of the upper compaction structure, the upper assembly comprises an upper assembly upper plate and an upper assembly lower plate, the upper assembly upper plate is arranged at an upper opening of the upper assembly cylinder, the upper assembly lower plate is arranged at a lower opening of the upper assembly cylinder, and through holes for installing upper control rod guide assemblies are arranged on the upper assembly upper plate and the upper assembly lower plate in pairs.
As the preferred scheme of the upper part pressing structure, through holes corresponding to the positions of the lower flange screw holes are formed in the upper part assembly upper plate and the upper part assembly lower plate, and the upper part assembly and the lower part assembly are connected in a separable mode through the upper part assembly upper plate, the upper part assembly lower plate, the lower flange screw holes and the upper flange screw holes which are sequentially penetrated through connecting screws.
As a preferable scheme of the upper compaction structure, the lower assembly comprises a lower assembly upper plate and a lower assembly lower plate, the lower assembly upper plate is arranged at an upper opening of the lower assembly cylinder, the lower assembly lower plate is arranged at a lower opening of the lower assembly cylinder, and through holes for mounting the lower control rod guide assemblies are arranged on the lower assembly upper plate and the lower assembly lower plate in pairs.
As a preferable scheme of the upper compaction structure, the side wall of the upper assembly cylinder is provided with a through hole for the flow of the coolant at the outlet of the reactor.
The reactor internals comprise the upper compaction structure, a lower hanging basket structure and an annular compaction spring; the upper portion compact 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 the reposition of redundant personnel baffle major diameter through-hole in from the top, and annular hold-down spring is located between lower part hanging flower basket structure middle part flange step and the reposition of redundant personnel baffle. The reactor internals mainly comprise an upper compaction structure, a lower hanging basket structure and an annular compaction spring, and the annular compaction spring is arranged on a flow dividing partition plate in a pressure vessel by the reactor internals, so that the function of axially compacting the reactor internals by the annular compaction 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 to separate the reactor inlet coolant from the reactor outlet coolant, so that an independent sealing element is not required to be arranged, and the cost and time for replacing the sealing element are saved.
As the preferable scheme of the reactor internals, the upper surface of the annular pressure spring and the lower surface of the annular pressure spring are respectively provided with an annular bulge, 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 of the annular pressure spring.
As a preferable scheme of the reactor internals, a retainer ring for accommodating an annular compression spring is arranged at the periphery of the large-diameter through hole of the flow dividing partition plate.
As a preferable scheme of the reactor internals, the reactors are arranged in the pressure vessel barrel, and the pressure vessel top cover acts on the upper compaction structure to compact the reactors.
As a preferable scheme of the reactor internals, the lower hanging basket structure comprises a lower hanging basket structure bottom plate, and through holes for the flow of the coolant at the reactor inlet are formed in the lower hanging basket structure bottom plate.
In summary, compared with the prior art, the invention has the following advantages and beneficial effects:
the split upper compaction structure comprises an upper assembly and a lower assembly, a control rod guide assembly arranged in the upper compaction structure is also divided into an upper control rod guide assembly and a lower control rod guide assembly, the radial positioning of the upper assembly and the lower assembly of the upper compaction structure is realized by a plurality of positioning pins uniformly arranged along the circumferential direction, and the upper assembly is accurately arranged above the lower assembly through the guide positioning of the positioning pins. The same radial arrangement position department of the lower flange of upper portion subassembly and the last flange of lower part subassembly has processed several complete screw holes simultaneously along circumference, can realize passing the through-hole of upper portion subassembly with connecting screw, be connected with the screw hole of the lower flange of upper portion subassembly and the last flange of lower part subassembly, be connected upper portion subassembly and lower part subassembly as a whole, both realized that upper portion compact structure's whole hangs into and hangs out pressure vessel, can unpack upper portion subassembly of upper portion compact structure again apart, dismantle the change to the lower part control rod guide assembly in the lower part subassembly.
The reactor internals designed by the invention also changes the annular compression spring from being arranged on the top of the internals to being arranged on a flow dividing partition plate in a pressure vessel, 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, the separation of the reactor inlet coolant and the reactor outlet coolant is realized, a sealing element is not required to be arranged on the flow dividing partition plate, the step and the cost of replacing the sealing element are saved, and the operation steps of the reactor during the material replacement are simplified.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a view of the internals.
FIG. 2 is a view of the upper packing structure of the internals.
Figure 3 is a top assembly view of the top hold-down structure.
Figure 4 is a view of the lower assembly of the upper compaction structure.
Figure 5 is a view of the lower basket structure.
Figure 6 is an illustration of an annular hold down spring.
Figure 7 is a connection diagram of the upper assembly and the lower assembly of the upper hold-down structure.
Fig. 8 is a view of the mounting of an annular hold-down spring on the splitter plate.
Figure 9 is a schematic view of the lower basket structure compressing the annular compression spring.
FIG. 10 is a schematic view of the installation of internals (the upper and lower components of the upper packing structure are integrally connected) into a pressure vessel.
FIG. 11 is a schematic flow diagram of reactor inlet coolant and reactor outlet coolant after the pressure vessel head is installed.
Fig. 12 is an enlarged view a of fig. 11.
Reference numbers and corresponding part names: 1-upper compression structure; 2-a lower basket structure; 3-annular hold-down spring; 4-an upper assembly; 5-a lower assembly; 6-an upper control rod guidance assembly; 7-lower control rod guidance assembly; 8, positioning pins; 9-lower flange screw hole; 10-upper flange screw holes; 11-upper assembly upper plate; 12-upper assembly cylinder; 13 — upper assembly lower plate; 14-upper assembly lower flange pin hole; 15-lower assembly upper plate; 16-lower assembly cylinder; 17-lower assembly lower plate; 18-lower basket structure cylinder; 19-lower basket structure 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-annular compression spring lower surface; 23-connecting a screw rod; 24-a splitter plate; 25-pressure vessel cylinder; 26-pressure vessel top cover; 27-reactor inlet coolant; 28-reactor outlet coolant.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the principles, features and the like of the present invention is made with reference to the following examples and accompanying drawings, and the exemplary embodiments and descriptions of the present invention are only used for explaining the present invention, and are not used as limiting the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "high", "low", "inner", "outer", "center", "length", "peripheral side", "circumferential" and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the scope of the invention.
The terms used in the present specification are those general terms currently widely used in the art in consideration of functions related to the present disclosure, but they may be changed according to the intention of a person having ordinary skill in the art, precedent, or new technology in the art. Also, 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. Therefore, the terms used in the specification should not be construed as simple names but based on the meanings of the terms and the overall description of the present disclosure.
Example 1
The embodiment discloses a split type upper compaction structure 1 of reactor internals, as shown in fig. 2, which is divided into an upper assembly 4 and a lower assembly 5, wherein the control rod guide assembly is divided into an upper control rod guide assembly 6 and a lower control rod guide assembly 7, the upper control rod guide assembly 6 is installed in the upper assembly 4, the lower control rod guide assembly 7 is installed in the lower assembly 5, and the upper assembly 4 is detachably connected with the lower assembly 5. The upper compact structure 1 is a split structure and can be separated into an upper assembly 4 and a lower assembly 5, wherein an upper control rod guide assembly 6 is installed in the upper assembly 4, and a lower control rod guide assembly 7 is installed in the lower assembly 5. The upper component 4 and the lower component 5 of the upper compaction structure 1 can be remotely connected to realize the common loading and unloading of the pressure vessel, so that the operation time is saved; the upper assembly 4 and the lower assembly 5 of the upper hold down structure 1 may also be released remotely to facilitate 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 assembly 4 includes an upper assembly cylinder 12, the lower assembly 5 includes a lower assembly cylinder 16, a lower flange screw hole 9 is formed at the bottom of the upper assembly cylinder 12, a flange screw hole 10 is formed at the top of the lower assembly cylinder 16, and the lower flange screw hole 9 and the upper flange screw hole 10 are butted with each other to realize a detachable connection between the upper assembly 4 and the lower assembly 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, the positioning pin 8 is disposed on the top of the lower assembly cylinder 16, the upper assembly lower flange pin hole 14 is disposed on the bottom of the upper assembly cylinder 12, and the upper assembly lower flange pin hole 14 corresponds to the positioning pin 8. A plurality of dowel pins 8 mounted on the lower assembly 5 are inserted into the upper assembly lower flange pin holes 14 of the upper assembly 4 to radially restrain the upper assembly 4 and to achieve one-to-one alignment of the upper and lower control rod guide assemblies 6 and 7.
As an alternative embodiment of the upper packing 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 mounted at an upper opening of the upper assembly cylinder 12, the upper assembly lower plate 13 is mounted at a lower opening of the upper assembly cylinder 12, and the upper assembly upper plate 11 and the upper assembly lower plate 13 are provided with through holes for mounting the upper control rod guide assemblies 6 in pairs.
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 a connecting screw 23 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. Threaded holes are simultaneously machined in the axial direction at the same circumferential arrangement positions of the upper assembly 4 and the lower assembly 5 of the upper compaction structure 1, and the upper assembly 4 and the lower assembly 5 are quickly connected into a whole through the matching of the connecting screw rod 23 and the threaded holes.
As an alternative embodiment of the upper packing 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 mounted at an upper opening of the lower assembly cylinder 16, the lower assembly lower plate 17 is mounted at a lower opening of the lower assembly cylinder 16, and the lower assembly upper plate 15 and the lower assembly lower plate 17 are provided with through holes in pairs for mounting the lower control rod guide assemblies 7.
As an alternative embodiment of the upper compacting structure 1, as shown in fig. 3 and 11, the side wall of the upper assembly cylinder 12 is provided with a through hole for the reactor outlet coolant 28 to flow through.
In conclusion, the split type upper compaction structure 1 is adopted in the reactor internals of the reactor in the embodiment, the upper compaction structure 1 is split into the upper assembly 4 provided with the upper control rod guide assembly 6 and the lower assembly 5 provided with the lower control rod guide assembly 7, the upper assembly 4 and the lower assembly 5 can be connected and separated, the integral installation and hanging-out of the upper compaction structure 1 can be realized, the lower control rod guide assembly 7 of the lower assembly 5 can be conveniently replaced, the lower control rod guide assembly 7 of the internals can be quickly detached and replaced, the step of replacing the lower control rod guide assembly 7 is greatly simplified, the replacement difficulty is reduced, and the replacement time is shortened.
Example 2
The embodiment discloses a reactor internals, as shown in fig. 1, comprising an upper hold-down structure 1 as described in embodiment 1, a lower basket structure 2 and an annular hold-down spring 3; the upper hold-down structure 1 is mounted in an opening in the top 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 includes a lower basket structure cylinder 18, and a lower basket structure middle flange step 20 is disposed outside a sidewall of the lower basket structure cylinder 18 for axially compressing the annular compression spring 3 mounted on the flow dividing partition 24, so that the upper and lower surfaces of the annular compression spring 3 form sealing surfaces after being compressed. As shown in fig. 10, the lower basket structure cylinder 18 passes through the large-diameter through hole of the flow dividing partition 24 from above, and as shown in fig. 8 and 9, the annular pressure spring 3 is located between the lower basket structure middle flange step 20 and the flow dividing partition 24. The reactor internals mainly comprise an upper compaction structure 1, a lower hanging basket structure 2 and an annular compaction spring 3, wherein the annular compaction spring 3 is arranged on a flow dividing partition plate 24 in a pressure vessel cylinder 25 by the reactor internals, so that the function of axially compacting the reactor internals by using the annular compaction spring 3 after a reactor pressure vessel top cover 26 is arranged is realized; and the sealing surfaces are formed at the upper end and the lower end of the annular compression spring 3, 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 the 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 hold-down spring upper surface 21 and the annular hold-down spring lower surface 22 of the annular hold-down spring 3 are respectively provided with annular protrusions, and the annular protrusions of the upper and lower surfaces are respectively positioned at the inner and outer sides or the inner and outer sides of the annular hold-down spring 3. As shown in fig. 12, after the annular pressure spring 3 is compressed, the upper surface 21 of the annular pressure spring is attached to the flange step 20 in the middle of the lower basket structure to form a sealing boundary, so as to isolate the reactor outlet coolant 28 above the flow dividing partition 24, and the lower surface 22 of the annular pressure spring is attached to the flow dividing partition 24 to form a sealing boundary, so as to isolate the reactor inlet coolant 27 below the flow dividing partition 24, thereby realizing the separation of the reactor inlet coolant 27 and the reactor outlet coolant 28.
As an alternative embodiment of the reactor internals, as shown in fig. 8 and 12, the periphery of the large diameter through hole of the flow dividing partition 24 is provided with a retainer ring for accommodating 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 barrel 25 and are compressed by a pressure vessel head 26 acting on the upper compression structure 1. When the pressure vessel roof 26 is installed, the annular pressure spring 3 is compressed downward by the upper pressure structure 1 and the lower basket structure 2, and the reactor inlet coolant 27 and the reactor outlet coolant 28 are separated from each other after the annular pressure spring 3 supported on the flow dividing partition 24 is 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 a through hole for the reactor inlet coolant 27 to flow through.
In conclusion, the annular compression spring 3 is arranged between the flange step 20 and the flow dividing partition plate 24 in the middle of the lower hanging basket structure of the reactor internals, and the annular compression spring 3 can axially compress the internals to realize axial compression of the internals; after the annular compression spring 3 is pressed and deformed, the upper end face and the lower end face form a sealing surface, the reactor inlet coolant 27 and the reactor outlet coolant 28 can be separated, the sealing ring does not need to be independently arranged for separating the coolant, the operation of replacing the sealing ring is omitted, and the structural composition of the reactor internal component is simplified.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (12)
1. Reactor internals's split type upper portion compact structure (1), its characterized in that: the control rod mechanism comprises an upper assembly (4) and a lower assembly (5), wherein an upper control rod guide assembly (6) is installed in the upper assembly (4), a lower control rod guide assembly (7) is installed in the lower assembly (5), and the upper assembly (4) is detachably connected with the lower assembly (5).
2. The upper compaction structure (1) according to claim 1, wherein: the upper assembly (4) comprises an upper assembly cylinder (12), the lower assembly (5) comprises a lower assembly cylinder (16), a lower flange screw hole (9) is formed in the bottom of the upper assembly cylinder (12), a flange screw hole (10) is formed in the top of the lower assembly cylinder (16), and the lower flange screw hole (9) and the upper flange screw hole (10) are mutually butted to realize that the upper assembly (4) is detachably connected with the lower assembly (5).
3. The upper compaction structure (1) according to claim 2, wherein: the top of the lower component cylinder (16) is provided with a positioning pin (8), the bottom of the upper component cylinder (12) is provided with an upper component lower flange pin hole (14), and the upper component lower flange pin hole (14) corresponds to the positioning pin (8).
4. The upper compaction structure (1) according to claim 2, wherein: 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 arranged at an upper opening of an upper assembly cylinder body (12), the upper assembly lower plate (13) is arranged at a lower opening of the upper assembly cylinder body (12), and through holes for installing upper control rod guide assemblies (6) are arranged on the upper assembly upper plate (11) and the upper assembly lower plate (13) in pairs.
5. Upper pressure structure (1) according to claim 4, characterized in that: the upper assembly upper plate (11) and the upper assembly lower plate (13) are respectively provided with a through hole corresponding to the position of the lower flange screw hole (9), and the upper assembly (4) and the lower assembly (5) are detachably connected by sequentially penetrating the upper assembly upper plate (11), the upper assembly lower plate (13), the lower flange screw hole (9) and the upper flange screw hole (10) through a connecting screw rod (23).
6. Upper pressure structure (1) according to claim 2, 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 an upper opening of the lower assembly cylinder body (16), the lower assembly lower plate (17) is arranged at a lower opening of the lower assembly cylinder body (16), and through holes for mounting the lower control rod guide assemblies (7) are arranged on the lower assembly upper plate (15) and the lower assembly lower plate (17) in pairs.
7. Upper pressure structure (1) according to claim 2, characterized in that: the side wall of the upper component cylinder (12) is provided with a through hole for the circulation of a reactor outlet coolant (28).
8. Reactor internals, its characterized in that: comprising an upper pressure structure (1) according to any one of claims 1-7, as well as a lower basket structure (2) and an annular pressure spring (3); the upper portion compact structure (1) is installed in lower part hanging flower basket structure (2) open-top, and lower part hanging flower basket structure (2) are including 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 pressure spring (3) were located between lower part hanging flower basket structure middle part flange step (20) and reposition of redundant personnel baffle (24).
9. The reactor internals according to claim 8, wherein: annular protrusions are respectively arranged on the upper surface (21) and the lower surface (22) of the annular compression spring (3), and the annular protrusions on the upper surface and the lower surface are respectively positioned on the inner side and the outer side or the inner side of the annular compression spring (3).
10. The reactor internals according to claim 9, wherein: the periphery of the large-diameter through hole of the flow dividing partition plate (24) is provided with a retainer ring for accommodating the annular compression spring (3).
11. The reactor internals according to claim 8, wherein: the internals are arranged in a pressure vessel cylinder (25) and are pressed by acting on the upper pressing structure (1) through a pressure vessel top cover (26).
12. The reactor internals according to claim 8, wherein: the lower hanging basket structure (2) comprises a lower hanging basket structure bottom plate (19), and through holes for circulating a reactor inlet coolant (27) are formed in the lower hanging 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115132382A true CN115132382A (en) | 2022-09-30 |
| CN115132382B CN115132382B (en) | 2024-01-26 |
Family
ID=83381231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210799492.XA Active CN115132382B (en) | 2022-07-08 | 2022-07-08 | Reactor internals adopting split upper part compression structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115132382B (en) |
Citations (11)
| 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 | Normal pressure low temperature shell type reactor |
| FR2925973A1 (en) * | 2007-12-28 | 2009-07-03 | Areva Np Sas | NUCLEAR REACTOR REPLACEMENT WAFER WITH BUCKLE TYPE FAST NEUTRONS |
| US20120076254A1 (en) * | 2010-09-27 | 2012-03-29 | Malloy John D | Compact nuclear reactor |
| US20130223580A1 (en) * | 2012-02-27 | 2013-08-29 | Scott J Shargots | Control rod drive mechanism (crdm) mounting system for pressurized water reactors |
| CN103440885A (en) * | 2013-08-28 | 2013-12-11 | 中国核动力研究设计院 | Integral-dismounting sealing piece as well as sealing structure for detector and reaction pile sealing container |
| CN103474104A (en) * | 2012-06-08 | 2013-12-25 | 中国核动力研究设计院 | Split-type integral pressurized water reactor with down-suspended basket |
| US20140140467A1 (en) * | 2012-04-16 | 2014-05-22 | Babcock & Wilcox Power Generation Group, Inc. | Pressurized water reactor with internal reactor coolant pump system |
| CN103903656A (en) * | 2012-12-26 | 2014-07-02 | 中国核动力研究设计院 | Reactor internals of pressurized water nuclear reactor |
| CN106531257A (en) * | 2016-12-29 | 2017-03-22 | 中国科学院合肥物质科学研究院 | In-reactor material changing system of reactor |
| CN110111914A (en) * | 2019-04-28 | 2019-08-09 | 中广核研究院有限公司 | A kind of nuclear reactor and its in-pile component |
| CN110164568A (en) * | 2019-05-17 | 2019-08-23 | 中广核研究院有限公司 | A kind of reactor body construction suitable for double-layer sleeve structure nuclear steam supply system |
-
2022
- 2022-07-08 CN CN202210799492.XA patent/CN115132382B/en active Active
Patent Citations (11)
| 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 | Normal pressure low temperature shell type reactor |
| FR2925973A1 (en) * | 2007-12-28 | 2009-07-03 | Areva Np Sas | NUCLEAR REACTOR REPLACEMENT WAFER WITH BUCKLE TYPE FAST NEUTRONS |
| US20120076254A1 (en) * | 2010-09-27 | 2012-03-29 | Malloy John D | Compact nuclear reactor |
| US20130223580A1 (en) * | 2012-02-27 | 2013-08-29 | Scott J Shargots | Control rod drive mechanism (crdm) mounting system for pressurized water reactors |
| US20140140467A1 (en) * | 2012-04-16 | 2014-05-22 | Babcock & Wilcox Power Generation Group, Inc. | Pressurized water reactor with internal reactor coolant pump system |
| CN103474104A (en) * | 2012-06-08 | 2013-12-25 | 中国核动力研究设计院 | Split-type integral pressurized water reactor with down-suspended basket |
| CN103903656A (en) * | 2012-12-26 | 2014-07-02 | 中国核动力研究设计院 | Reactor internals of pressurized water nuclear reactor |
| CN103440885A (en) * | 2013-08-28 | 2013-12-11 | 中国核动力研究设计院 | Integral-dismounting sealing piece as well as sealing structure for detector and reaction pile sealing container |
| CN106531257A (en) * | 2016-12-29 | 2017-03-22 | 中国科学院合肥物质科学研究院 | In-reactor material changing system of reactor |
| CN110111914A (en) * | 2019-04-28 | 2019-08-09 | 中广核研究院有限公司 | A kind of nuclear reactor and its in-pile component |
| CN110164568A (en) * | 2019-05-17 | 2019-08-23 | 中广核研究院有限公司 | A kind of reactor body construction suitable for double-layer sleeve structure nuclear steam supply system |
Non-Patent Citations (4)
| Title |
|---|
| 丁宗华;黄磊;林绍萱;: "CAP1400堆内构件流致振动试验模拟件的设计", 核科学与工程, no. 02 * |
| 康健;: "改进型百万千瓦级核电站核岛主设备――堆内构件", 装备机械, no. 04 * |
| 张宏亮;罗英;李翔;范恒;刘晓;周禹;: "CSR1000结构总体设计方案", 核动力工程, no. 01 * |
| 王庆田;许斌;李燕;: "秦山核电二期扩建工程3#堆吊篮筒体焊接变形的处理", 电焊机, no. 08 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115132382B (en) | 2024-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4631168A (en) | Nuclear reactor fuel assembly with a removable top nozzle | |
| EP0140588B1 (en) | Nuclear reactor fuel assembly with a removable top nozzle | |
| EP0147183B1 (en) | Removable top nozzle and tool for a nuclear reactor fuel assembly | |
| CN115132382A (en) | Reactor internal member adopting split type upper portion compression structure | |
| US3870099A (en) | Seal assembly | |
| CN112253821B (en) | Fast-assembling combined liquid supply valve, use method and fast splicing method | |
| CN111916228B (en) | Driving rod group on control rod driving mechanism and offshore reactor | |
| US5600694A (en) | Nuclear fuel upper end fitting quick disconnect joint | |
| CN209892834U (en) | Multi-lug support pre-tightening structure of self-sealing valve cover of high-temperature and high-pressure valve | |
| CN214788879U (en) | Double-nut rolling ball screw pair | |
| CN108711458B (en) | Reactor pressure vessel and support device for pressure vessel outlet nozzle | |
| US4684502A (en) | Top nozzle alignment sleeve capture arrangement in a reconstitutable fuel assembly | |
| CN212444951U (en) | Positioning device for machining of belleville springs | |
| CN210265083U (en) | Diaphragm pump with intracavity damping structure | |
| CN114499066A (en) | Stator dismounting process of modularized arc-shaped motor | |
| CN219711852U (en) | Maintenance seal for lead bismuth pump | |
| RU183459U1 (en) | The main part of the air distributor of the brake system of a railway vehicle | |
| CN109036593B (en) | Reactor core hanging basket structure | |
| CN208179044U (en) | Lathe quick clamping system | |
| CN220151942U (en) | Filling gun adopting compact waist drum valve fluid control | |
| CN208221058U (en) | Pressure adjusting structure for booster pump and the booster pump with it | |
| CN214714763U (en) | Filter that socket joint formula is connected | |
| CN220286413U (en) | Packing parallel type packing sealing structure and pyrolysis furnace | |
| CN216731490U (en) | Pressing mechanism and pressing device with same | |
| CN214764549U (en) | Nitrogen oxide reactor for smoke treatment of water-soluble glass kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |