CN108039212B - Upper internals suitable for floating reactor - Google Patents
Upper internals suitable for floating reactor Download PDFInfo
- Publication number
- CN108039212B CN108039212B CN201711324309.6A CN201711324309A CN108039212B CN 108039212 B CN108039212 B CN 108039212B CN 201711324309 A CN201711324309 A CN 201711324309A CN 108039212 B CN108039212 B CN 108039212B
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- spring
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- control rod
- guide cylinder
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- 230000001133 acceleration Effects 0.000 claims abstract description 26
- 238000004146 energy storage Methods 0.000 claims abstract description 24
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
-
- 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)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses an upper part in-pile component suitable for a floating reactor, which relates to the field of marine nuclear power devices, and comprises a supporting cylinder, wherein a horizontally arranged fixed supporting plate is fixedly arranged at the top of the supporting cylinder, and a through hole for a reactor control rod assembly to pass through is formed in the fixed supporting plate; the guide cylinder is arranged in the supporting cylinder, and one end of the guide cylinder is embedded in the through hole of the fixed supporting plate; and the acceleration energy storage device is arranged at the top of the fixed supporting plate and is used for providing additional kinetic energy for the reactor control rod assembly when the reactor control rod assembly falls down. The upper in-pile component suitable for the floating reactor comprises the acceleration energy storage device, and the acceleration energy storage device is arranged in the upper in-pile component in the reactor pressure vessel, so that the acceleration energy storage function of the control rod assembly in the reactor pressure vessel can be realized, and the acceleration rod dropping of the control rod assembly under the marine environment condition of the floating reactor can be realized.
Description
Technical Field
The invention relates to the field of marine nuclear power devices, in particular to an upper internal reactor component suitable for a floating reactor.
Background
The reactor internals are located within the reactor pressure vessel and provide a flow path for coolant within the pressure vessel, and are primarily divided into upper and lower internals. Wherein the upper internals provide protection and reliable guidance for the control rod assembly; the bottom internals provide reliable support and positioning of the fuel assemblies and their associated components, shielding neutrons and gamma rays. When the emergency situation occurs in the reactor, the control rod assembly needs to fall into the reactor core to control the shutdown so as to ensure the working safety of the reactor.
Because of the special operating environment of a floating reactor, the whole reactor is in a tilting, swaying and heave marine environment for a long time, and the rod dropping action cannot be safely realized in the traditional mode of driving a control rod assembly to be inserted into a reactor core to control shutdown by means of gravity. In order to ensure that the control rod assembly can quickly fall back to the reactor core during emergency shutdown, the rod falling time requirement of the nuclear design is met, and a special acceleration energy storage device is required to be arranged so as to ensure the safe shutdown of the reactor.
In the domestic and foreign reactor structure design of the floating reactor, most of the acceleration energy storage devices are arranged outside the reactor pressure vessel and used in the control rod driving mechanism for driving the control rod assembly to lift, and the control rod driving mechanism is detached one by one in the loading and unloading process although the control rod assembly is accelerated to fall, so that higher process requirements are provided for the control rod driving mechanism, the loading and unloading operation time of the reactor is obviously prolonged, and the economic benefit of a nuclear power station is reduced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide an upper internal component suitable for a floating reactor, which can realize the function of accelerating rod falling of a control rod assembly in a pressure vessel in the marine environment of the floating reactor, has a simple and reliable structure and is convenient for loading and unloading operations of the reactor.
In order to achieve the above purpose, the invention adopts the following technical scheme:
An upper internals for a floating reactor, which are disposed within a reactor pressure vessel, comprising:
The top of the supporting cylinder is fixedly provided with a fixed supporting plate which is horizontally arranged, and the fixed supporting plate is provided with a through hole for the reactor control rod assembly to pass through;
The guide cylinder is arranged in the supporting cylinder, and one end of the guide cylinder is embedded in the through hole of the fixed supporting plate;
And the acceleration energy storage device is arranged at the top of the fixed supporting plate and is used for providing additional kinetic energy for the reactor control rod assembly when the reactor control rod assembly falls down.
On the basis of the technical scheme, at least two groups of guide cylinders are arranged and are consistent with the control rod assemblies in number, and the guide cylinders in each group are axially parallel to each other.
On the basis of the technical scheme, the acceleration energy storage device comprises an elastic piece, wherein the elastic piece is compressively kept on the top of the fixed supporting plate and is used for ejecting the reactor control rod assembly when the rod falls.
On the basis of the technical scheme, the acceleration energy storage device comprises:
The sleeve supporting cylinder is fixedly arranged at the top of the fixed supporting plate, and the sleeve supporting cylinder and the guide cylinder are correspondingly arranged and are mutually communicated;
the spring guide cylinder is arranged in the sleeve supporting cylinder, and the top end of the spring guide cylinder is fixedly connected with the top of the sleeve supporting cylinder;
One end of the spring upper seat extends into the spring guide cylinder, and the other end of the spring upper seat is fixed between the spring guide cylinder and the sleeve support cylinder;
the accelerating spring is arranged in the spring guide cylinder, one end of the accelerating spring is fixedly connected with the spring upper seat, and the other end of the accelerating spring is fixedly provided with a spring lower seat.
On the basis of the technical scheme, spiral grooves are formed in the bottom of the upper spring seat and the top of the lower spring seat, and the accelerating springs are respectively connected with the upper spring seat and the lower spring seat through the spiral grooves.
On the basis of the technical scheme, the outer cylinder wall of the sleeve supporting cylinder is provided with a plurality of waist round holes, the top of the sleeve supporting cylinder is provided with a bolt positioning and mounting hole, and the spring upper seat, the sleeve supporting cylinder and the spring guide cylinder are connected into a whole through bolts penetrating through the bolt positioning and mounting hole.
On the basis of the technical scheme, the number of the guide cylinders and the number of the spring guide cylinders are consistent with the number of the control rod assemblies, and the guide cylinders and the spring guide cylinders are arranged in one-to-one correspondence.
On the basis of the technical scheme, the part of the spring upper seat extending into the spring guide cylinder is of a cylindrical cylinder structure, and the outer wall of the cylindrical cylinder structure is tightly attached to the inner wall of the spring guide cylinder.
On the basis of the technical scheme, the waist round hole is formed in the outer wall of the guide cylinder, a full-stroke C-shaped pipe is arranged in the guide cylinder, the C-shaped pipe is fixed on the guide cylinder, and a channel for a reactor control rod to pass through is reserved in the C-shaped pipe.
Compared with the prior art, the invention has the advantages that:
(1) The upper in-pile component suitable for the floating reactor comprises the acceleration energy storage device, and the acceleration energy storage device is arranged in the upper in-pile component in the reactor pressure vessel, so that the acceleration energy storage function of the control rod assembly in the reactor pressure vessel can be realized, and the acceleration rod dropping of the control rod assembly under the marine environment condition of the floating reactor can be realized.
(2) The upper in-pile member suitable for the floating reactor can avoid the control coordination problem of different components inside and outside the reactor pressure environment in the process of loading and unloading the reactor by arranging the acceleration energy storage device in the upper in-pile member in the reactor pressure vessel.
(3) The invention is suitable for the upper part in-pile components of the floating reactor, avoids the control rod driving mechanism on the top cover of the pressure vessel from being dismantled one by one in the process of loading and unloading the reactor, and can lift the accelerated rod-falling energy storage device out along with the upper part in-pile components after being lifted out along with the whole top cover of the pressure vessel, thereby greatly reducing the steps and time of loading and unloading the reactor and improving the economic benefit of the nuclear power station.
Drawings
FIG. 1 is a schematic view of an upper internals suitable for use in a floating reactor in accordance with an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a speed-increasing energy-storing device in an embodiment of the present invention.
In the figure: the device comprises a 1-supporting cylinder, a 2-fixed supporting plate, a 3-guiding cylinder, a 4-accelerating energy storage device, a 5-spring upper seat, a 6-spring guiding cylinder, a 7-sleeve supporting cylinder, an 8-accelerating spring and a 9-spring lower seat.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides an upper internals for a floating reactor, which is disposed within a reactor pressure vessel, comprising:
The reactor control rod assembly comprises a support cylinder 1, wherein a horizontally arranged fixed support plate 2 is fixedly arranged at the top of the support cylinder 1, and a through hole for a reactor control rod assembly to pass through is formed in the fixed support plate 2;
the guide cylinder 3 is arranged in the supporting cylinder 1, and one end of the guide cylinder 3 is embedded in the through hole of the fixed supporting plate 2;
the acceleration energy storage device 4 is arranged on the top of the fixed supporting plate 2, and the acceleration energy storage device 4 is used for providing additional kinetic energy for the reactor control rod assembly when the reactor control rod assembly falls down.
The rod falling acceleration energy storage device is arranged in the upper reactor inner member, so that the rod falling acceleration of the control rod assembly under the marine environment condition of the floating reactor is realized; meanwhile, in the process of loading and unloading the reactor, the acceleration energy storage device and the control rod driving device are arranged separately, so that the acceleration energy storage device can be lifted out along with the first upper internal components, the steps and time of loading and unloading the reactor are greatly shortened, and the economy of the nuclear power station is improved.
The guide cylinders 3 are provided with at least two groups, the number of the guide cylinders is kept consistent with that of the control rod assemblies, the guide cylinders 3 of each group are axially parallel to each other, and the requirement of simultaneous rod falling control of a plurality of control rod assemblies is met.
The acceleration storage means 4 is for providing additional kinetic energy to the reactor control rod assembly when the reactor control rod assembly is dropped, in particular the acceleration storage means 4 comprises a resilient member held in compression on top of the fixed support plate 2 for ejecting the reactor control rod assembly when the rod is dropped.
The accelerating energy storage device 4 in the embodiment specifically includes:
The sleeve supporting cylinder 7 is fixedly arranged at the top of the fixed supporting plate 2, and the sleeve supporting cylinder 7 and the guide cylinder 3 are correspondingly arranged and are mutually communicated; the outer wall of the sleeve supporting cylinder 7 can be provided with a plurality of waist-shaped round holes, the top of the sleeve supporting cylinder 7 is provided with a bolt positioning and mounting hole, and the spring upper seat 5, the sleeve supporting cylinder 7 and the spring guide cylinder 6 are connected into a whole through bolts penetrating through the bolt positioning and mounting hole.
The spring guide cylinder 6 is arranged in the sleeve supporting cylinder 7, and the top end of the spring guide cylinder 6 is fixedly connected with the top of the sleeve supporting cylinder 7;
The spring upper seat 5, one end of the spring upper seat 5 stretches into the spring guide cylinder 6, and the other end is fixed between the spring guide cylinder 6 and the sleeve support cylinder 7; the part of the spring upper seat 5 extending into the spring guide cylinder 6 is of a cylindrical cylinder structure, and the outer wall of the cylindrical cylinder structure is tightly attached to the inner wall of the spring guide cylinder 6.
And the accelerating spring 8 is arranged in the spring guide cylinder 6, one end of the accelerating spring is fixedly connected with the upper spring seat 5, and the other end of the accelerating spring is fixedly provided with a lower spring seat 9.
Furthermore, spiral grooves can be formed in the bottom of the upper spring seat 5 and the top of the lower spring seat 9, and the accelerating spring 8 is respectively connected with the upper spring seat 5 and the lower spring seat 9 through the spiral grooves.
Further, the number of the guide cylinders 3 and the number of the spring guide cylinders 6 can be kept consistent with that of the control rod assemblies, and the guide cylinders 3 and the spring guide cylinders 6 are arranged in a one-to-one correspondence.
In the related embodiment, a waist round hole can be formed on the outer cylinder wall of the guide cylinder 3 so as to facilitate the outflow of liquid; meanwhile, a full-stroke C-shaped pipe can be arranged in the guide cylinder 3, the C-shaped pipe is fixed on the guide cylinder 3, and a channel for a reactor control rod to pass through is reserved in the C-shaped pipe.
The invention is not limited to the embodiments described above, but a number of modifications and adaptations can be made by a person skilled in the art without departing from the principle of the invention, which modifications and adaptations are also considered to be within the scope of the invention. What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (8)
1. An upper internals for a floating reactor, which are disposed within a reactor pressure vessel, comprising:
The reactor control rod assembly comprises a support cylinder (1), wherein a fixed support plate (2) which is horizontally arranged is fixedly arranged at the top of the support cylinder (1), and a through hole through which a reactor control rod assembly can pass is formed in the fixed support plate (2);
The guide cylinder (3) is arranged in the supporting cylinder (1), and one end of the guide cylinder (3) is embedded in the through hole of the fixed supporting plate (2);
The acceleration energy storage device (4) is arranged at the top of the fixed supporting plate (2), and the acceleration energy storage device (4) is used for providing additional kinetic energy for the reactor control rod assembly when the reactor control rod assembly falls down;
The acceleration energy storage device (4) comprises:
the sleeve supporting cylinder (7), the sleeve supporting cylinder (7) is fixedly arranged at the top of the fixed supporting plate (2), and the sleeve supporting cylinder (7) and the guide cylinder (3) are correspondingly arranged and are mutually communicated;
The spring guide cylinder (6), the spring guide cylinder (6) is arranged in the sleeve supporting cylinder (7), and the top end of the spring guide cylinder (6) is fixedly connected with the top of the sleeve supporting cylinder (7);
A spring upper seat (5), wherein one end of the spring upper seat (5) extends into the spring guide cylinder (6), and the other end of the spring upper seat is fixed between the spring guide cylinder (6) and the sleeve support cylinder (7);
And the accelerating spring (8) is arranged in the spring guide cylinder (6), one end of the accelerating spring is fixedly connected with the spring upper seat (5), and the other end of the accelerating spring is fixedly provided with a spring lower seat (9).
2. The upper internals suitable for use in a floating reactor according to claim 1, wherein: the guide cylinders (3) are arranged in at least two groups, the number of the guide cylinders is consistent with that of the control rod assemblies, and the guide cylinders (3) of each group are axially parallel to each other.
3. The upper internals suitable for use in a floating reactor according to claim 1, wherein: the accelerating spring is compressively held on top of the fixed support plate (2) and is used to eject the reactor control rod assembly when the rod falls.
4. The upper internals suitable for use in a floating reactor according to claim 1, wherein: spiral grooves are formed in the bottoms of the upper spring seat (5) and the tops of the lower spring seat (9), and the accelerating springs (8) are respectively connected with the upper spring seat (5) and the lower spring seat (9) through the spiral grooves.
5. The upper internals suitable for use in a floating reactor according to claim 1, wherein: the outer cylinder wall of the sleeve supporting cylinder (7) is provided with a plurality of waist-shaped round holes, the top of the sleeve supporting cylinder (7) is provided with bolt positioning and mounting holes, and the spring upper seat (5), the sleeve supporting cylinder (7) and the spring guide cylinder (6) are connected into a whole through bolts penetrating through the bolt positioning and mounting holes.
6. The upper internals suitable for use in a floating reactor according to claim 1, wherein: the number of the guide cylinders (3) and the number of the spring guide cylinders (6) are consistent with the number of the control rod assemblies, and the guide cylinders (3) and the spring guide cylinders (6) are arranged in one-to-one correspondence.
7. The upper internals suitable for use in a floating reactor according to claim 1, wherein: the spring upper seat (5) stretches into the spring guide cylinder (6) to form a cylindrical cylinder structure, and the outer wall of the cylindrical cylinder structure is tightly attached to the inner wall of the spring guide cylinder (6).
8. An upper internals suitable for use in a floating reactor according to any one of claims 1-7, wherein: the reactor control rod is characterized in that a waist round hole is formed in the outer cylinder wall of the guide cylinder (3), a full-stroke C-shaped pipe is arranged in the guide cylinder (3), the C-shaped pipe is fixed on the guide cylinder (3), and a channel for a reactor control rod to pass through is reserved in the C-shaped pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711324309.6A CN108039212B (en) | 2017-12-13 | 2017-12-13 | Upper internals suitable for floating reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711324309.6A CN108039212B (en) | 2017-12-13 | 2017-12-13 | Upper internals suitable for floating reactor |
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| Publication Number | Publication Date |
|---|---|
| CN108039212A CN108039212A (en) | 2018-05-15 |
| CN108039212B true CN108039212B (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711324309.6A Active CN108039212B (en) | 2017-12-13 | 2017-12-13 | Upper internals suitable for floating reactor |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922638B (en) * | 2018-07-25 | 2024-05-17 | 中广核研究院有限公司 | Control rod driving mechanism with auxiliary rod falling device |
| CN109994224A (en) * | 2019-01-11 | 2019-07-09 | 中广核工程有限公司 | Ship reactor control rod drive mechanism |
| CN109830310A (en) * | 2019-01-11 | 2019-05-31 | 中广核工程有限公司 | Ship reactor improved electric magnetic-type control rod drive mechanism |
| CN110767328B (en) * | 2019-10-31 | 2021-04-27 | 中海石油(中国)有限公司 | Device and method for driving shutdown control rod in overturning state of floating nuclear power station |
| CN110767327B (en) * | 2019-10-31 | 2021-04-27 | 中海石油(中国)有限公司 | Passive shutdown control rod driving device and method in overturning state of floating nuclear power plant |
| CN111667929A (en) * | 2020-07-28 | 2020-09-15 | 中国原子能科学研究院 | Control rod driving mechanism and reactor with same |
| CN112002445B (en) * | 2020-07-31 | 2022-09-09 | 清华大学 | Built-in control rod drive wire guide structure and control rod water pressure drive system |
| CN111933314B (en) * | 2020-08-07 | 2022-05-10 | 上海核工程研究设计院有限公司 | Passive shutdown device for nuclear reactor |
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| CN207624388U (en) * | 2017-12-13 | 2018-07-17 | 中国船舶重工集团公司第七一九研究所 | A kind of upper-part in-reactor component suitable for floating type reactor |
| CN108899098A (en) * | 2018-07-20 | 2018-11-27 | 中广核研究院有限公司 | A kind of in-pile component structure suitable for presurized water reactor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8483347B2 (en) * | 2007-04-10 | 2013-07-09 | Westinghouse Electric Company Llc | Upper internals arrangement for a pressurized water reactor |
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2017
- 2017-12-13 CN CN201711324309.6A patent/CN108039212B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3503268A (en) * | 1967-01-12 | 1970-03-31 | Westinghouse Electric Corp | Control rod insertion system |
| US3762994A (en) * | 1969-12-10 | 1973-10-02 | Siemens Ag | Drive assembly for nuclear reactor control rods |
| CN1038717A (en) * | 1988-02-11 | 1990-01-10 | 法国法码通公司 | Has reactor internal upper part member every the stream device |
| CN1057357A (en) * | 1990-05-07 | 1991-12-25 | 法玛通公司 | The nuclear reactor internal member that the cluster guide piece is arranged |
| CN1781159A (en) * | 2003-05-22 | 2006-05-31 | 西屋电气有限责任公司 | High energy absorption top nozzle for a nuclear fuel assembly |
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| Publication number | Publication date |
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| CN108039212A (en) | 2018-05-15 |
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