CN110942836A - Instrument of pressurized water reactor nuclear power plant reactor core checking - Google Patents
Instrument of pressurized water reactor nuclear power plant reactor core checking Download PDFInfo
- Publication number
- CN110942836A CN110942836A CN201911396426.2A CN201911396426A CN110942836A CN 110942836 A CN110942836 A CN 110942836A CN 201911396426 A CN201911396426 A CN 201911396426A CN 110942836 A CN110942836 A CN 110942836A
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- CN
- China
- Prior art keywords
- adapter
- irradiation
- underwater camera
- reactor
- storage rack
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- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000007689 inspection Methods 0.000 claims abstract description 21
- 239000003758 nuclear fuel Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000000446 fuel Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 6
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/08—Structural combination of reactor core or moderator structure with viewing means, e.g. with television camera, periscope, window
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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)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nuclear fuel management of a nuclear power plant, and particularly relates to a reactor core checking tool of a pressurized water reactor nuclear power plant. Comprises an adapter, an irradiation-resistant underwater camera and a storage rack; one end of the adapter is convenient for the loading and unloading machine to grab, the other end of the adapter is connected with the irradiation-resistant underwater camera, and the storage rack temporarily stores the irradiation-resistant underwater camera with the adapter in a carrier in a reactor refueling water tank. The device also comprises an integrated electrical cabinet and a display, and is connected with the irradiation-resistant underwater camera. The tool uses an adapter device to connect with an underwater camera, and then uses the gripping apparatus of a material loading and unloading machine to directly grip the adapter and the camera for inspection, thereby replacing an underwater long rod device to avoid the condition of being sucked by a pressure container water outlet, and improving the inspection safety. Meanwhile, the irradiation-resistant underwater camera is used, so that the definition is greatly improved, and the time of a main line for checking is saved.
Description
Technical Field
The invention belongs to the technical field of nuclear fuel management of a nuclear power plant, and particularly relates to a reactor core checking tool of a pressurized water reactor nuclear power plant.
Background
The pressurized water reactor nuclear power plant unit needs to be refueled during each overhaul, and in order to ensure that the position and the direction of fuel assemblies loaded into the reactor core in the next cycle and related assemblies inserted in the reactor core are correct, the reactor core checking work needs to be carried out during each overhaul. This work is carried out immediately after the completion of the charging, for major line overhaul times, generally about 3 hours.
At present, most of domestic pressurized water reactor nuclear power plants adopt an underwater long rod video device to check reactor core fuel assemblies, the device is installed on a loading and unloading machine rail through a buckle device, then an underwater camera is lowered to an underwater proper depth through a mode of connecting a plurality of long rods (generally 4-5 sections), and then information such as identification numbers of the fuel assemblies is checked. Such inspection tools suffer from the following disadvantages:
the long rod tool needs to be assembled and connected on the loading and unloading machine manually, the matching performance of the long rod and the interface part of the loading and unloading machine rail is not high, the last section of long rod needs to be assembled above the reactor core, and the risk that the connecting rod falls into the reactor core exists;
the long rod system is fixed with the handrails of the loading and unloading machine, and the long rod system needs to be manually moved on the handrails after one row/column of the reactor core is inspected every time, so that the operation risk is increased. Other parts such as a radioactive detection cabinet and the like exist on the handrails of the loading and unloading machine, and part of the positions interfere with the long rod connecting part, so that the direction of the underwater camera has to be adjusted to be inclined for inspection, and the inspection effect is further influenced;
the whole underwater long rod device is formed by connecting a plurality of long rods, so that the whole rigidity is insufficient, the underwater long rod device is easy to bend due to the suction force of a pressure container water outlet when core inspection is carried out, the condition that the underwater camera is dangerous to be sucked into the pressure container water outlet when core inspection is carried out after overhaul loading of a certain power plant 101 or 202, the long rod is greatly bent when being sucked, and once the long rod is broken, the whole underwater camera and part of the long rods are sucked into a loop, so that immeasurable influence and loss are caused.
Disclosure of Invention
The invention aims to provide a checking tool for a reactor core of a pressurized water reactor nuclear power plant, which uses an adapter device to connect an underwater camera, uses a gripping apparatus of a loading and unloading machine to directly grip the adapter and the camera for checking, replaces an underwater long rod device, thereby avoiding the condition of being sucked by a water outlet of a pressure container and improving the safety of checking. Meanwhile, the irradiation-resistant underwater camera is used, so that the definition is greatly improved, and the time of a main line for checking is saved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a tool for checking a reactor core of a pressurized water reactor nuclear power plant comprises an adapter, an irradiation-resistant underwater camera and a storage rack; one end of the adapter is convenient for the loading and unloading machine to grab, the other end of the adapter is connected with the irradiation-resistant underwater camera, and the storage rack temporarily stores the irradiation-resistant underwater camera with the adapter in a carrier in a reactor refueling water tank.
The device also comprises an integrated electrical cabinet and a display, and is connected with the irradiation-resistant underwater camera.
Placing an irradiation-resistant underwater camera with an adapter into a storage rack on a 20m platform of a reactor plant, wherein 3 lifting rings at the upper part of the storage rack are connected with 3 steel wire ropes; carrying the storage rack, the adapter and the irradiation-resistant underwater camera to a corridor on the side of a hook of a loading and unloading machine; operating a loader of a reactor factory building to a vertical state; a storage rack, an adapter and an irradiation-resistant underwater camera are hung in a carrier by using a hook of a loading and unloading machine through three steel wire ropes; the three steel wire ropes are released from the lifting hook, and then the three steel wire ropes are fixed on a pool guardrail near the loader, so that the steel wire ropes can not interfere with the adapter and the irradiation-resistant underwater camera to be lifted out of the adapter; grabbing the adapter together with the irradiation-resistant underwater camera from the storage rack by using a grab of the loading and unloading machine; the loading and unloading machine moves to the upper part of the reactor core, the adapter and the irradiation-resistant underwater camera are lowered to a proper height, signals for video inspection are transmitted to an integrated electrical cabinet and a display which are positioned on a reactor ground platform through an underwater cable, and then the loading and unloading machine moves above the reactor core according to a set path to finish the inspection of the whole reactor core fuel assembly.
The beneficial effects obtained by the invention are as follows:
the adapter with the structure similar to that of the upper tube seat of the fuel assembly is designed, so that the loading and unloading machine can conveniently grab the adapter, the adapter is convenient, quick, safe and reliable, the risk of being sucked by the water outlet of the pressure container can be effectively avoided, the risk of falling into a reactor core when a long rod tool is assembled is also avoided, and the inspection safety is greatly improved;
the adapter is reliably connected with the gripping apparatus and synchronously moves along with the material loading and unloading machine, so that the long rod tools are prevented from being manually moved among different rows, and the inspection efficiency is improved;
the camera is the same with the position of the material loading and unloading machine gripping apparatus, and can be directly positioned to the position of each inspected assembly during system inspection, so that the inspection efficiency is improved, and meanwhile, the automatic identification function can be added through the manual identification technology, and the accuracy is improved.
Drawings
FIG. 1 is a schematic view of an adapter and camera;
FIG. 2 is a schematic view of a handler grasping a camera with an adapter from a carrier and storage rack;
FIG. 3 is a schematic view of a storage rack for temporary storage above a carrier;
in the figure: 1. an adapter; 2. an irradiation resistant underwater camera; 3. and (4) a storage rack.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1-3, the checking tool for the reactor core of the pressurized water reactor nuclear power plant comprises an adapter 1, an irradiation-resistant underwater camera 2 and a storage rack 3;
The irradiation-resistant underwater camera 2 is used for closely checking information such as a fuel assembly identification number, and image information is transmitted to an electric appliance cabinet located on a ground platform of a reactor plant through a cable.
The storage rack 3 is used for temporarily storing the irradiation-resistant underwater camera 2 with the adapter 1 in a carrier in a reactor refueling water pool, and then the loader-unloader grabs the irradiation-resistant underwater camera 2 for inspection.
The integrated electrical cabinet and the display are used for operating the irradiation-resistant underwater camera 2 and processing and displaying video signals transmitted by the irradiation-resistant underwater camera 2.
The irradiation-resistant underwater camera 2 with the adapter 1 is grabbed by using a material handling machine grabbing tool, the irradiation-resistant underwater camera 2 is descended to the appropriate depth of the reactor core for inspection, a video inspection signal is transmitted to an integrated electrical cabinet and a display which are positioned on a ground platform of the reactor through an underwater cable, and then the material handling machine moves above the reactor core according to a set path to complete the inspection of the whole reactor core fuel assembly.
Before major repair, the equipment is transported to a reactor factory building, assembled and installed, and the specific flow is as follows:
placing an irradiation-resistant underwater camera 2 with an adapter 1 into a storage rack 3 on a platform 20m away from a reactor plant, wherein 3 lifting rings on the upper part of the storage rack 3 are connected with 3 steel wire ropes; carrying the storage rack 3, the adapter 1 and the irradiation-resistant underwater camera 2 to a corridor on the side of a hook of a loading and unloading machine; operating a loader of a reactor factory building to a vertical state; a storage rack 3, an adapter 1 and an irradiation-resistant underwater camera 2 are hoisted into a carrier by using a hook of a loading and unloading machine through three steel wire ropes, and the whole assembly (comprising the storage rack, the adapter and the camera) ensures gravity self-balance in design and hoisting safety; the three steel wire ropes are released from the lifting hook, and then the three steel wire ropes are fixed on a pool guardrail near the loader, so that the steel wire ropes can not interfere with the adapter 1 and the irradiation-resistant underwater camera 2 to be lifted out of the adapter; grabbing the adapter 1 together with the irradiation-resistant underwater camera 2 from the storage rack 3 by using a grab of a loading and unloading machine; the loading and unloading machine moves to the position above the reactor core, the adapter 1 and the irradiation-resistant underwater camera 2 are lowered to a proper height, and the checking work of all the reactor core fuel assemblies can be completed according to a set moving path.
Claims (3)
1. The utility model provides a pressurized water reactor nuclear power plant reactor core checking's instrument which characterized in that: comprises an adapter, an irradiation-resistant underwater camera and a storage rack; one end of the adapter is convenient for the loading and unloading machine to grab, the other end of the adapter is connected with the irradiation-resistant underwater camera, and the storage rack temporarily stores the irradiation-resistant underwater camera with the adapter in a carrier in a reactor refueling water tank.
2. The pressurized water reactor nuclear power plant core inspection tool of claim 1, wherein: the device also comprises an integrated electrical cabinet and a display, and is connected with the irradiation-resistant underwater camera.
3. The pressurized water reactor nuclear power plant core inspection tool of claim 2, wherein: placing an irradiation-resistant underwater camera with an adapter into a storage rack on a 20m platform of a reactor plant, wherein 3 lifting rings at the upper part of the storage rack are connected with 3 steel wire ropes; carrying the storage rack, the adapter and the irradiation-resistant underwater camera to a corridor on the side of a hook of a loading and unloading machine; operating a loader of a reactor factory building to a vertical state; a storage rack, an adapter and an irradiation-resistant underwater camera are hung in a carrier by using a hook of a loading and unloading machine through three steel wire ropes; the three steel wire ropes are released from the lifting hook, and then the three steel wire ropes are fixed on a pool guardrail near the loader, so that the steel wire ropes can not interfere with the adapter and the irradiation-resistant underwater camera to be lifted out of the adapter; grabbing the adapter together with the irradiation-resistant underwater camera from the storage rack by using a grab of the loading and unloading machine; the loading and unloading machine moves to the upper part of the reactor core, the adapter and the irradiation-resistant underwater camera are lowered to a proper height, signals for video inspection are transmitted to an integrated electrical cabinet and a display which are positioned on a reactor ground platform through an underwater cable, and then the loading and unloading machine moves above the reactor core according to a set path to finish the inspection of the whole reactor core fuel assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911396426.2A CN110942836A (en) | 2019-12-30 | 2019-12-30 | Instrument of pressurized water reactor nuclear power plant reactor core checking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911396426.2A CN110942836A (en) | 2019-12-30 | 2019-12-30 | Instrument of pressurized water reactor nuclear power plant reactor core checking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110942836A true CN110942836A (en) | 2020-03-31 |
Family
ID=69913744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911396426.2A Withdrawn CN110942836A (en) | 2019-12-30 | 2019-12-30 | Instrument of pressurized water reactor nuclear power plant reactor core checking |
Country Status (1)
| Country | Link |
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| CN (1) | CN110942836A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111696691A (en) * | 2020-05-26 | 2020-09-22 | 江苏核电有限公司 | Method and device for inspecting matching surface between bottom of protection tube assembly and nuclear fuel assembly |
-
2019
- 2019-12-30 CN CN201911396426.2A patent/CN110942836A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111696691A (en) * | 2020-05-26 | 2020-09-22 | 江苏核电有限公司 | Method and device for inspecting matching surface between bottom of protection tube assembly and nuclear fuel assembly |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200331 |
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| WW01 | Invention patent application withdrawn after publication |