CN203026178U - Reactor internal at lower part of reactor - Google Patents
Reactor internal at lower part of reactor Download PDFInfo
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- CN203026178U CN203026178U CN2013200072161U CN201320007216U CN203026178U CN 203026178 U CN203026178 U CN 203026178U CN 2013200072161 U CN2013200072161 U CN 2013200072161U CN 201320007216 U CN201320007216 U CN 201320007216U CN 203026178 U CN203026178 U CN 203026178U
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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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Abstract
The utility model discloses a reactor internal at the lower part of a reactor. The reactor internal is contained inside a reactor pressure container (1) and comprises a reactor core supporting lower plate (2), a flow distributing device (3), support columns (4), energy absorbing devices (5), a secondary support base plate (6) and an eddy-current confinement plate (7). According to the reactor internal, circular holes of proper sizes, quantity, shapes and positions are formed in the flow distributing device, thus good distributing effect is realized before a coolant enters a reactor core, the on-way resistance loss is reduced, and indexes of inlet flow distribution deviation allowable value, maximum average flow and the like of adjacent assemblies are satisfied.
Description
Technical field
The utility model PWR nuclear power plant nuclear reactor designs technical field is specifically related to a kind of reactor bottom in-pile component.
Background technology
The closed circuit of presurized water reactor comprises a loop and secondary circuit, and wherein the derivation of reactor heat has been completed in a loop, and heat is transmitted to secondary circuit by steam generator and produces the Steam Actuation steam turbine power generation.One loop mainly is comprised of reactor pressure vessel, in-pile component, fuel assembly, steam generator, main pump, pipeline etc.
Fuel assembly is placed in pressure vessel, realizes supporting by in-pile component.Nuclear fuel is kept controlled chain reaction of nuclear fission produce power in reactor.The energy that nuclear fission produces is absorbed by cooling medium, and realization is cooling to fuel assembly.Coolant temperature after the absorption energy raises, and under the forced circulation effect of main pump, enters steam generator via trunk line, carries out the exchange of heat with secondary circuit, and the cooling medium after temperature reduces reenters reactor core.
Cooling fully in order to make fuel assembly obtain, cooling medium needs to guarantee its homogeneity, so the bottom in-pile component of reactor can arrange flow distribution device usually before entering reactor core.Traditional flow distribution device mostly is the orifice-plate type structure, is formed by stacking by certain support by one or more layers orifice plate.But cavity volume reduces instantly, and it is no longer desirable that the assignment of traffic effect of this structure becomes, and replaces so need to seek new structure.
The flow distribution device of Overseas New bottom in-pile component has adopted distribution structure of rings form, and being matched by an assignment of traffic ring of having processed a large amount of discharge orifices and an eddy current suppressing plate forms.The assignment of traffic relative ideal of this structure, but because the assignment of traffic ring is directly to be welded on pressure vessel, make in the whole phase in longevity to change, risk is higher, and in addition, the resistance coefficient of structure itself is higher.
Summary of the invention
The purpose of this utility model is in order to overcome the defective of prior art, provide a kind of simple in structure, assignment of traffic is even, resistance coefficient is little, the reactor bottom in-pile component being convenient to keep in repair and change.
For solving the problems of the technologies described above, the technical solution of the utility model is, a kind of reactor bottom in-pile component is included in reactor pressure vessel inside, comprises reactor core supporting lower plate, flow distribution device, support column, energy absorbing device, anti-breaking base plate and eddy current suppressing plate; Wherein, reactor core supporting lower plate is fixed in bottom reactor core, several support columns are fixed on the bottom of reactor core supporting lower plate, the coaxial flow distribution device that is provided with some circular holes that is mounted with in reactor core supporting lower plate bottom, open the discharge orifice on reactor core supporting lower plate, support column passes flow distribution device and is fixedly connected with the bottom of reactor core supporting lower plate, support column lower surface level is fixedly connected with the eddy current suppressing plate, eddy current suppressing plate bottom is mounted with some energy absorbing devices, and fixing anti-breaking base plate is installed under energy absorbing device.
Described eddy current suppressing plate bottom is mounted with 4 energy absorbing devices.
Described flow distribution device comprises the assignment of traffic ring flat-plate, the distribution bottom that circumferentially is fixedly connected with assignment of traffic ring flat-plate bottom, the reinforcing prop that is fixedly connected with the distribution bottom upper surface, assignment of traffic ring flat-plate, distribution bottom are welded by solid forging or forging-ring and sheet material and are integrated, and the upper surface of assignment of traffic ring flat-plate upper surface and reinforcing prop is coplanar.
The angle that described assignment of traffic ring flat-plate and distribution bottom form and the low head inner surface profile of pressure vessel coupling.
Described assignment of traffic ring flat-plate is provided with some protuberances, is provided with the threaded connector counterbore in protuberance.
The circumferential side wall of described assignment of traffic ring flat-plate is provided with isodiametric circular hole, and circular hole is Rotational Symmetry and arranges.
Described assignment of traffic ring flat-plate protuberance place does not arrange circular hole usually.
Evenly be provided with isodiametric small sircle hole on described distribution bottom, small sircle hole is arranged Rotational Symmetry, 4 discharge orifices on the equal corresponding reactor core supporting lower plate of each small sircle hole.
Pass the position at support column on described distribution bottom and have some big holes, big hole is larger than the flange diameter of support column lower end, and support column passes big hole and is fixedly connected with reactor core supporting lower plate, forms flowing water ring section between big hole and support column.
The utility model is by arranging the circular hole of suitable size, quantity, shape and position on flow distribution device, realized that cooling medium enters the front well distribution effects of reactor core, reduced friction loss, the inlet flow rate that has satisfied adjacent assemblies distributes the indexs such as deviation allowable value, maximum average discharge.
Description of drawings
Fig. 1 is a kind of reactor bottom in-pile component structural representation.
Fig. 2 is the flow distribution device structural representation.
In figure, 1-reactor pressure vessel, 2-reactor core supporting lower plate, 3-flow distribution device, 4-support column, the 5-energy absorbing device, the anti-breaking base plate of 6-, 7-eddy current suppressing plate, 8-assignment of traffic ring flat-plate, 9-distribution bottom, the 10-reinforcing prop, 11-protuberance, 12-small sircle hole, 13-big hole.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
A kind of reactor bottom in-pile component is included in reactor pressure vessel 1 inside, comprises reactor core supporting lower plate 2, flow distribution device 3, support column 4, energy absorbing device 5, anti-breaking base plate 6 and eddy current suppressing plate 7, as shown in Figure 1 wherein.Reactor core supporting lower plate 2 is fixed in bottom reactor core, several support columns 4 are fixed on the bottom of reactor core supporting lower plate 2, the coaxial flow distribution device 3 that is provided with some circular holes that is mounted with in reactor core supporting lower plate 2 bottoms, open the discharge orifice on reactor core supporting lower plate 2, support column 4 passes flow distribution device 3 and is fixedly connected with the bottom of reactor core supporting lower plate 2, support column 4 lower surface levels are fixedly connected with eddy current suppressing plate 7, eddy current suppressing plate 7 bottoms are mounted with 4 energy absorbing devices 5, and energy absorbing device is installed fixing anti-breaking base plate 6 for 5 times.
After flow distribution device 3 processing have been assembled, be connected with reactor core supporting lower plate 2 lower surfaces by screw or welding, energy absorbing device 5 is installed in the below.The intensity of flow distribution device 3 can support the weight of bottom in-pile component, so can directly be placed on storage rack take flow distribution device 3 lower surfaces as carrying plane.
The critical components such as bottom in-pile component, top in-pile component, reactor pressure vessel 1, reactor core consist of pressurized-water reactor and are connected in a loop.The bottom in-pile component is provided with flow distribution device, purpose be guarantee cooling medium before entering reactor core enough evenly.Can the degree of uniformity that the reactor core inlet flow rate distributes is related to the reactor core heat in time be derived smoothly, the position of reactor core focus and the size of hot channel factor have directly been determined, and hot channel factor is directly connected to the safety of whole nuclear reactor and even whole nuclear power plant, has influence on simultaneously the economy of core steam.
pass through the utility model, after cooling medium enters from the pressure vessel inlet adapter, pass through ring cavity, enter flow distribution device 3 outsides of reactor lower chambers, realize turning to along pressure vessel low head arc surface, pass through the circular hole of assignment of traffic ring flat-plate 8 sidewalls from the cooling medium of surrounding and bottom surface, the small sircle hole 12 of distribution bottom 9 and big hole 13 enter in flow distribution device 3, carry out mixing and redistributing to a certain degree in flow distribution device 3 after, enter uniformly reactor core, due to protuberance 11 being arranged, reinforcing prop 10 is connected the connection of lower plate with reactor core, make whole flow distribution device have good rigidity, can resist the impact of cooling medium.
The utility model also can be regulated distribution effects and friction loss before cooling medium enters reactor core by the size, quantity, shape and the position that change flow distribution device 3 discharge orifices, distributes the indexs such as deviation allowable value, maximum average discharge with the inlet flow rate that satisfies adjacent assemblies.
The above has done detailed description to embodiment of the present utility model, above-mentioned embodiment is only optimum embodiment of the present utility model, but the utility model is not limited to above-described embodiment, in the ken that those of ordinary skills possess, can also make various variations under the prerequisite that does not break away from the utility model aim.
Claims (9)
1. reactor bottom in-pile component, be included in reactor pressure vessel (1) inside, it is characterized in that comprising reactor core supporting lower plate (2), flow distribution device (3), support column (4), energy absorbing device (5), anti-breaking base plate (6) and eddy current suppressing plate (7), wherein, reactor core supporting lower plate (2) is fixed in bottom reactor core, several support columns (4) are fixed on the bottom of reactor core supporting lower plate (2), reactor core supporting lower plate (2) bottom is mounted with the flow distribution device (3) that is provided with some circular holes, open the discharge orifice on reactor core supporting lower plate (2), support column (4) passes flow distribution device (3) and is fixedly connected with the bottom of reactor core supporting lower plate (2), support column (4) lower surface level is fixedly connected with eddy current suppressing plate (7), eddy current suppressing plate (7) bottom is mounted with some energy absorbing devices (5), the lower installation of energy absorbing device (5) fixed anti-breaking base plate (6).
2. a kind of reactor as claimed in claim 1 bottom in-pile component is characterized in that eddy current suppressing plate (7) bottom is mounted with 4 energy absorbing devices (5).
3. a kind of reactor as claimed in claim 1 bottom in-pile component, it is characterized in that the distribution bottom (9) that flow distribution device (3) comprises assignment of traffic ring flat-plate (8), circumferentially is fixedly connected with assignment of traffic ring flat-plate (8) bottom, the reinforcing prop (10) that is fixedly connected with distribution bottom (9) upper surface, assignment of traffic ring flat-plate (8), distribution bottom (9) are welded by solid forging or forging-ring and sheet material and are integrated, and the upper surface of assignment of traffic ring flat-plate (8) upper surface and reinforcing prop (10) is coplanar.
4. a kind of reactor as claimed in claim 3 bottom in-pile component is characterized in that the angle that assignment of traffic ring flat-plate (8) and distribution bottom (9) form mates with the low head inner surface profile of pressure vessel.
5. a kind of reactor as claimed in claim 3 bottom in-pile component, is characterized in that assignment of traffic ring flat-plate (8) is provided with some protuberances (11), and protuberance is provided with the threaded connector counterbore in (11).
6. a kind of reactor as claimed in claim 3 bottom in-pile component, is characterized in that the circumferential side wall of assignment of traffic ring flat-plate (8) is provided with isodiametric circular hole, and circular hole is Rotational Symmetry and arranges.
7. a kind of reactor as claimed in claim 5 bottom in-pile component is characterized in that assignment of traffic ring flat-plate (8) protuberance (11) locates not arrange circular hole.
8. a kind of reactor as claimed in claim 3 bottom in-pile component, it is characterized in that evenly being provided with on distribution bottom (9) isodiametric small sircle hole (12), small sircle hole (12) is arranged Rotational Symmetry, 4 discharge orifices on the equal corresponding reactor core supporting lower plate of each small sircle hole (12).
9. a kind of reactor as claimed in claim 3 bottom in-pile component, upward passing the position at support column (4) has some big holes (13) to it is characterized in that joining base plate (9), big hole (13) is larger than the flange diameter of support column (4) lower end, support column (4) passes big hole (13) and is fixedly connected with reactor core supporting lower plate (2), forms flowing water ring section between big hole (13) and support column (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200072161U CN203026178U (en) | 2013-01-08 | 2013-01-08 | Reactor internal at lower part of reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200072161U CN203026178U (en) | 2013-01-08 | 2013-01-08 | Reactor internal at lower part of reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026178U true CN203026178U (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013200072161U Expired - Lifetime CN203026178U (en) | 2013-01-08 | 2013-01-08 | Reactor internal at lower part of reactor |
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| CN (1) | CN203026178U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177782A (en) * | 2013-01-08 | 2013-06-26 | 上海核工程研究设计院 | Lower reactor internals for reactor |
| CN109616225A (en) * | 2018-11-12 | 2019-04-12 | 中国原子能科学研究院 | A kind of in-pile component support base having gamma shielding and assignment of traffic function |
| CN111681786A (en) * | 2020-06-23 | 2020-09-18 | 中国科学院上海应用物理研究所 | Lower cavity structure of reactor container and reactor container |
-
2013
- 2013-01-08 CN CN2013200072161U patent/CN203026178U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177782A (en) * | 2013-01-08 | 2013-06-26 | 上海核工程研究设计院 | Lower reactor internals for reactor |
| WO2014108072A1 (en) * | 2013-01-08 | 2014-07-17 | 国家核电技术有限公司 | Flow allocation apparatus, lower reactor internal of reactor, and reactor |
| GB2523519A (en) * | 2013-01-08 | 2015-08-26 | State Nuclear Power Technology Corp Ltd | Flow allocation apparatus, lower reactor internal of reactor, and reactor |
| CN103177782B (en) * | 2013-01-08 | 2015-08-26 | 上海核工程研究设计院 | A kind of reactor bottom in-pile component |
| GB2523519B (en) * | 2013-01-08 | 2018-07-11 | State Nuclear Power Tech Corporation Ltd | Flow allocation apparatus, lower reactor internal of reactor, and reactor |
| US10636530B2 (en) | 2013-01-08 | 2020-04-28 | State Nuclear Power Technology Corporation Ltd. | Flow distribution device, lower internals of reactor and reactor |
| CN109616225A (en) * | 2018-11-12 | 2019-04-12 | 中国原子能科学研究院 | A kind of in-pile component support base having gamma shielding and assignment of traffic function |
| CN109616225B (en) * | 2018-11-12 | 2024-05-10 | 中国原子能科学研究院 | In-pile component supporting base with gamma shielding and flow distribution functions |
| CN111681786A (en) * | 2020-06-23 | 2020-09-18 | 中国科学院上海应用物理研究所 | Lower cavity structure of reactor container and reactor container |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Address before: 200233 No. 29, Hongcao Road, Xuhui District, Shanghai Patentee before: Shanghai Nuclear Engineering Research & Design Institute |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |