Multifunctional test platform for checking and maintaining reactor core coaming

Abstract

The invention belongs to the technical field of nuclear power maintenance, and particularly relates to a multifunctional test platform for checking and maintaining a reactor core coaming. Comprising a bottom plate, a coaming assembly, connecting blocks and reinforcing ribs, the coaming assembly is fixed on the bottom plate through the connecting blocks, the coaming assembly and the bottom plate jointly simulate a local coaming of a reactor core, and the coaming assembly is provided with the reinforcing ribs. The device has the beneficial effects that the coaming parts can be replaced, so that the simulation requirements of different heap types can be met; the reactor core positioning pin can be replaced, so that the simulation requirements of different reactor types can be met; specifications and positions of a plurality of pile type coaming bolts and screw holes can be simulated at the same time; components can be quickly disassembled and assembled, and transportation is convenient.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power maintenance technology, specifically relating to a multi-functional test platform for core enclosure inspection and maintenance. Background Technology

[0002] Nuclear power generation utilizes the heat released from the self-sustaining chain fission reaction of nuclear fuel to generate electricity. After the initial criticality of a pressurized water reactor nuclear power plant, the nuclear fuel assemblies, primary loop system, and equipment are highly radioactive, making the maintenance environment extremely harsh. Maintenance personnel cannot approach them normally, and conventional methods cannot be used for maintenance operations.

[0003] Reactor core cladding directly supports and confines nuclear fuel assemblies. During operation, it is subjected to harsh conditions such as high radiation, high temperature, high pressure, water flow impact, and flow-induced vibration. Failure to cladding can lead to irreversible and serious consequences, affecting the nuclear safety of the nuclear power plant. To meet the needs of reactor core cladding operation / maintenance, fault assessment, and post-repair evaluation, a multi-functional test platform for core cladding inspection and maintenance needs to be developed. Summary of the Invention

[0004] The purpose of this invention is to provide a multifunctional test platform for core enclosure inspection and maintenance, which can realize functions such as core enclosure environmental inspection, maintenance operation, and functional verification.

[0005] The technical solution of the present invention is as follows: a multi-functional test platform for core enclosure inspection and maintenance, including a base plate, enclosure assembly, connecting blocks and reinforcing ribs, the enclosure assembly is fixed to the base plate by the connecting blocks, the enclosure assembly and the base plate together simulate a local enclosure of the core, and the enclosure assembly is provided with reinforcing ribs.

[0006] The enclosure assembly includes multiple enclosure components, which are fixed together by bolts.

[0007] The reinforcing ribs are fixed to the enclosure assembly by enclosure bolts.

[0008] The base plate is equipped with guide pins.

[0009] The guide pin is used to simulate a real bolt on site, and the material, size, and position of the guide pin in the reactor core are consistent with those on site.

[0010] The base plate is equipped with multiple lifting lugs, which are used in different positions depending on the type of the simulation.

[0011] The base plate, surrounding plate assembly, connecting blocks, and reinforcing ribs are all made of stainless steel or aluminum alloy.

[0012] The bolts of the enclosure are made of stainless steel or aluminum alloy.

[0013] The guide pin is made of stainless steel or aluminum alloy.

[0014] The lugs are made of stainless steel or aluminum alloy.

[0015] The beneficial effects of this invention are as follows: the cofferdam components are replaceable to meet the simulation requirements of different stack types; the core positioning pins are replaceable to meet the simulation requirements of different stack types; the specifications and positions of cofferdam bolts and screw holes of multiple stack types can be simulated simultaneously; the components can be quickly disassembled and assembled, and are convenient to transport. Attached Figure Description

[0016] Figure 1 A schematic diagram of the multi-functional test platform for core ballast inspection and repair provided by the present invention;

[0017] Figure 2 Another perspective is a schematic diagram of the multifunctional test platform for core enclosure inspection and maintenance provided by the present invention.

[0018] In the diagram: 1. Base plate; 2. Enclosure assembly; 3. Enclosure bolts; 4. Guide pin; 5. Connecting block; 6. Lifting lug; 7. Reinforcing rib. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 and 2 As shown, the multi-functional test platform for core enclosure inspection and maintenance includes a base plate 1, enclosure assembly 2, enclosure bolts 3, guide pins 4, connecting blocks 5, lifting lugs 6, and reinforcing ribs 7. Enclosure assembly 2 comprises multiple enclosure components, which are mutually fixed by bolts. Reinforcing ribs 7 are installed on the exterior of each enclosure component to maintain relative stability and form the local shape of the core enclosure. Enclosure assembly 2 is fixed to the base plate 1 by connecting blocks 5, ensuring relative stability between the two. Enclosure assembly 2 and base plate 1 together simulate a local core enclosure, with their position and dimensions remaining relatively consistent with the actual core on site.

[0021] The cofferdam bolts 3 are installed on the cofferdam assembly 2, and their material, size, height, and position are consistent with those of the on-site core cofferdam bolts. Multiple cofferdam bolts 3 at different locations in different reactor configurations can be simulated simultaneously on the cofferdam assembly 2. The reinforcing ribs 7 are fixed to the cofferdam assembly 2 by the cofferdam bolts 3.

[0022] Guide pin 4 is used to simulate a real bolt on site. The material, size, and position of the guide pin in the core are consistent with those on site. Guide pin 4 is specifically installed on the base plate 1.

[0023] Multiple lifting lugs 6 are installed on the base plate 1, and different lifting lugs 6 can be used in different positions according to different stacking types of the simulation.

[0024] The base plate 1, the surrounding plate assembly 2, the surrounding plate bolts 3, the guide pins 4, the connecting block 5, the lifting lugs 6, and the reinforcing ribs 7 are all made of stainless steel or aluminum alloy.

[0025] The enclosure components in this invention are replaceable to meet the simulation requirements of different stack types. The core positioning pins are also replaceable to meet the simulation requirements of different stack types. The specifications and positions of the enclosure bolts and screw holes of multiple stack types can be simulated simultaneously. The components can be quickly disassembled and assembled, and are convenient to transport.

Claims

1. A multi-functional test platform for inspecting and repairing reactor core shrouds, characterized in that: It includes a base plate, a cofferdam assembly, connecting blocks, and reinforcing ribs. The cofferdam assembly is fixed to the base plate by the connecting blocks. The cofferdam assembly and the base plate together simulate the local cofferdam of the reactor core. The cofferdam assembly is equipped with reinforcing ribs.

2. The multi-functional test platform for core enclosure inspection and repair as described in claim 1, characterized in that: The enclosure assembly includes multiple enclosure components, which are fixed together by bolts.

3. The multi-functional test platform for core enclosure inspection and repair as described in claim 1, characterized in that: The reinforcing ribs are fixed to the enclosure assembly by enclosure bolts.

4. The multi-functional test platform for core enclosure inspection and repair as described in claim 1, characterized in that: The base plate is equipped with guide pins.

5. The multi-functional test platform for core enclosure inspection and repair as described in claim 1, characterized in that: The guide pin is used to simulate a real bolt on site, and the material, size, and position of the guide pin in the reactor core are consistent with those on site.

6. The multi-functional test platform for core enclosure inspection and repair as described in claim 1, characterized in that: The base plate is equipped with multiple lifting lugs, which are used in different positions depending on the type of the simulation.

7. The multi-functional test platform for core enclosure inspection and repair as described in claim 1, characterized in that: The base plate, surrounding plate assembly, connecting blocks, and reinforcing ribs are all made of stainless steel or aluminum alloy.

8. The multi-functional test platform for core enclosure inspection and repair as described in claim 3, characterized in that: The bolts of the enclosure are made of stainless steel or aluminum alloy.

9. The multi-functional test platform for core enclosure inspection and repair as described in claim 4, characterized in that: The guide pin is made of stainless steel or aluminum alloy.

10. The multi-functional test platform for core enclosure inspection and repair as described in claim 6, characterized in that: The lugs are made of stainless steel or aluminum alloy.

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