Containment steel lining nuclear grade coating supervision member installation device

Abstract

The utility model relates to the field of nuclear power plant containment steel lining nuclear grade coating management, in particular to a containment steel lining nuclear grade coating supervision piece installation device which comprises two enclosure baffles, supporting stand columns, limiting clamping groove plates, cover plate connecting hinges and a cover plate. The two enclosure baffles are connected in a welded mode through a plurality of supporting stand columns, a plurality of limiting clamping groove plates are arranged in the enclosure baffles, the enclosure baffles are connected with the two ends of the limiting clamping groove plates in a welded mode, and a containment steel lining nuclear grade coating monitoring piece is placed between every two adjacent limiting clamping groove plates; the top end of the upper-layer enclosure baffle is connected with a cover plate through a cover plate connecting hinge. The device adopts a hollow grillwork form, is internally provided with a fixed clamping groove, and enables the nuclear-grade coating supervision pieces to be fully exposed in an irradiation environment, and the contact surfaces of the nuclear-grade coating supervision pieces and the environment are consistent in size, so that the aging and degradation rates of the nuclear-grade coating supervision pieces are consistent.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power plant containment steel lining nuclear grade coating management, in particular to a containment steel lining nuclear grade coating supervision piece installation device. Background Art

[0002] The surface of the containment steel lining is typically coated with a nuclear-grade coating, which provides corrosion protection and prevents contamination by radioactive materials. Therefore, the coating must exhibit excellent radiation resistance, aging resistance, and decontamination properties, maintaining a continuous, sealed, and intact state. As a nuclear safety-related item, the containment steel lining's nuclear-grade coating must remain stable even in the event of a nuclear power plant design basis accident (LOCA) to prevent flaking of the coating from clogging the containment spray system's circulating filters and impacting its normal operation under accident conditions. To verify that the steel lining's nuclear-grade coating still meets its nuclear safety and functional requirements, regular aging testing is performed to monitor its aging status.

[0003] To conduct destructive testing on the containment steel lining's nuclear-grade coating without compromising its integrity, a number of nuclear-grade coating monitoring components are reserved within the containment during nuclear power plant construction. These components are sampled and tested regularly, following the same formulation, construction, maintenance, and service environment as the existing nuclear-grade coating components. Through regular sampling and testing, various aging parameters of the nuclear-grade coating are obtained and used to assess the actual aging state and lifespan of the containment steel lining. Prior art containment steel lining nuclear-grade coating monitoring components lack fixed fixtures, posing the risk of becoming a source of projectiles during an earthquake, adversely affecting surrounding nuclear-grade equipment. Summary of the Invention

[0004] The purpose of the utility model is to provide a device for installing nuclear-grade coating monitoring parts of a containment steel lining, which is used to solve the problem in the prior art that when an earthquake occurs, the nuclear-grade coating monitoring parts of the containment steel lining may become a source of flying objects and cause adverse effects on surrounding nuclear-grade equipment.

[0005] The technical solution of this utility model:

[0006] The utility model proposes a device for installing a nuclear-grade coating supervision component for a containment steel liner. The device comprises two enclosure baffles, supporting columns, limiting card slot plates, cover plate connecting hinges and a cover plate. The enclosure baffle is a hollow rectangular structure. The two enclosure baffles are welded and connected by a number of supporting columns. A number of limiting card slot plates are arranged inside the enclosure baffle. The enclosure baffle and the limiting card slot plates are welded at both ends. The nuclear-grade coating supervision component for the containment steel liner is placed between two adjacent limiting card slot plates. The top of the upper enclosure baffle is connected to the cover plate through a cover plate connecting hinge.

[0007] In some embodiments, a cover plate lock is welded on the side of the cover plate opposite to the cover plate connecting hinge. The cover plate lock can be connected to the upper enclosure baffle through connecting bolts, and the cover plate lock is used to lock the cover plate.

[0008] In some embodiments, the device is further provided with a slot support plate, which connects the upper enclosure baffle and the corresponding limiting slot plate in the lower enclosure baffle, and the slot support plate is used to support the limiting slot plate.

[0009] In some embodiments, a plurality of slots are provided on the limiting slot plate, which are used to place the nuclear-grade coating monitoring parts of the containment steel lining, and the slot width is 10 mm and the depth is 15 mm; the limiting slot plate and the enclosure baffle are intermittently spot welded; the number of slots and the width of the limiting slot plate are determined by the number and size of the nuclear-grade coating monitoring parts of the containment steel lining.

[0010] In some embodiments, the devices are made of stainless steel, which is passivated by pickling.

[0011] In some embodiments, a trapezoidal rib is provided on the support column, and the trapezoidal rib is fully connected to the support column by butt welding.

[0012] In some embodiments, a nameplate is further provided on the outside of the device, and the nameplate information includes information about the steel lining nuclear grade coating supervisor and the person responsible for management.

[0013] In some embodiments, the support columns are fixed to the ground by expansion bolts, the device is fixed parallel to the radial direction of the containment, and is placed in the irradiation hotspot area of ​​the containment corridor; the height of the nuclear-grade coating monitoring parts of the containment steel lining is used to determine the height of the support columns and the welding position between the enclosure baffle and the support columns.

[0014] In some embodiments, both the tensile force and the shear force at the expansion bolts meet seismic requirements.

[0015] In some embodiments, the shear force at the connection bolts meets seismic requirements.

[0016] Beneficial effects of implementing this utility model:

[0017] The utility model proposes a device for installing nuclear-grade coating monitoring parts for containment steel lining, which has the following beneficial effects:

[0018] 1. The device adopts the form of a hollow frame with a fixed slot inside. The device allows the nuclear-grade coating monitoring parts to be fully exposed to the irradiation environment, and the contact surface between the nuclear-grade coating monitoring parts and the environment is consistent in size, ensuring that the aging and degradation rate of each nuclear-grade coating monitoring part is consistent.

[0019] 2. The device limits the movement of nuclear-grade coating monitoring parts, preventing them from becoming a source of flying objects and affecting surrounding nuclear-grade equipment when an earthquake occurs, thus meeting the seismic design requirements for items in the nuclear island plant.

[0020] 3. A nameplate is hung on the outside of the device. The nameplate information includes the steel lining nuclear grade coating supervision part and the management responsible person information to meet the nuclear island plant management requirements of the nuclear power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of opening the lock of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of a support column of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a limit slot plate of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a slot support plate of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of a cover plate lock buckle of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of a cover plate connection hinge of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present utility model;

[0027] Figure 7 A schematic diagram of a cover plate of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of an expansion bolt for a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0029] Figure 9 A schematic diagram of connecting bolts of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0030] Figure 10 A schematic diagram of a containment steel lining nuclear grade coating monitoring component of a containment steel lining nuclear grade coating monitoring component installation device proposed in an embodiment of the present utility model;

[0031] Figure 11 A schematic diagram of a containment baffle of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0032] Figure 12 A schematic diagram of the lock closing of a containment steel lining nuclear-grade coating monitoring component installation device proposed in an embodiment of the present invention;

[0033] Description of the accompanying drawings: 1. Enclosure baffle; 2. Support column; 3. Limiting slot plate; 4. Slot support plate; 5. Cover lock; 6. Cover connecting hinge; 7. Cover; 8. Expansion bolt; 9. Connecting bolt; 10. Containment steel lining nuclear-grade coating supervision parts. DETAILED DESCRIPTION

[0034] like Figures 1 to 12 As shown, the utility model proposes a device for installing a nuclear-grade coating monitoring component for a containment steel liner, which includes two enclosure baffles 1, support columns 2, limit card slots 3, cover plate connecting hinges 6 and a cover plate 7. The enclosure baffle 1 is a hollow rectangular structure. The two enclosure baffles 1 are welded together by a number of support columns 2. A number of limit card slots 3 are provided inside the enclosure baffle 1. The enclosure baffle 1 and the limit card slots 3 are welded together at both ends. A containment steel liner nuclear-grade coating monitoring component 10 is placed between two adjacent limit card slots 3. The top of the upper enclosure baffle 1 is connected to the cover plate 7 through the cover plate connecting hinge 6. A cover plate lock 5 is welded to the side of the cover plate 7 opposite to the cover plate connecting hinge 6. The cover plate lock 5 can be connected to the upper enclosure baffle 1 through a connecting bolt 9. The cover plate lock 5 is used to lock the cover plate 7. The device adopts the form of a hollow frame with fixed slots inside. The containment steel lining nuclear-grade coating supervision parts 10 are fully exposed to the irradiation environment, and the environmental contact surfaces are of uniform size, ensuring that the aging and degradation rates of each containment steel lining nuclear-grade coating supervision parts 10 are consistent.

[0035] In some embodiments, the device is also provided with a slot support plate 4, which connects the upper protective baffle 1 with the corresponding limiting slot plate 3 in the lower protective baffle 1. The slot support plate 4 is used to support the limiting slot plate 3 to prevent it from moving.

[0036] In some embodiments, the position-limiting slot plate 3 is provided with a plurality of slots for accommodating the containment steel lining nuclear-grade coating monitoring components 10. The slots are 10 mm wide and 15 mm deep. The slot width is slightly larger than the thickness of the containment steel lining nuclear-grade coating monitoring components 10, meeting the on-site installation requirements of the containment steel lining nuclear-grade coating monitoring components 10 while limiting their movement. The number and width of the slots in the position-limiting slot plate 3 are determined by the number and size of the containment steel lining nuclear-grade coating monitoring components. The position-limiting slot plate 3 is intermittently spot-welded to the enclosure baffle 1 to prevent deformation of the position-limiting slot plate 3.

[0037] The number and size of the containment steel lining nuclear-grade coating supervision parts 10 are used to determine the distance between the middle limit slot plate and the limit slot plates on both sides, and then the size of the enclosure baffle 1 is determined according to the size and distance of the limit slot plate 3.

[0038] In some embodiments, the devices are made of stainless steel, which is pickled and passivated to increase the radiation resistance of the devices.

[0039] In some embodiments, a trapezoidal rib is provided on the support column 2 , and the trapezoidal rib is connected to the support column 2 by full butt welding, thereby enhancing the strength of the support column 2 .

[0040] The height of the support column 2 and the welding position between the containment baffle 1 and the support column 2 are determined according to the height of the containment steel lining nuclear grade coating supervision piece 10.

[0041] In some embodiments, a nameplate is further provided on the outside of the device, and the nameplate information includes information about the steel lining nuclear grade coating supervision part and the person in charge of management, so as to meet the nuclear island building management requirements of the nuclear power plant.

[0042] In some embodiments, support columns 2 are secured to the ground using expansion bolts 8, which are fixed parallel to the radial direction of the containment and placed in the irradiation hotspot of the containment gallery. The tensile and shear forces at expansion bolts 8 meet seismic requirements, as does the shear force at bolts 9 connecting the cover plate lock 5. This device limits the movement of nuclear-grade coating monitoring components, preventing them from becoming a source of projectiles and impacting surrounding nuclear-grade equipment during an earthquake, thus meeting seismic design requirements for items within the nuclear island building.

[0043] When installing this device, the enclosure baffle 1, the supporting column 2 and the limiting card slot plate 3 are welded and assembled into a whole. The cover plate lock 5 is welded to the cover plate 7, and the cover plate 7 is connected to the enclosure baffle 1 of the containment steel lining nuclear grade coating supervision component installation device through the connecting hinge 6, so that the cover plate 7 can be opened / closed freely. After the containment steel lining nuclear grade coating supervision component 10 is placed in the card slot in turn, the cover plate 7 is covered, and the cover plate is locked with the connecting bolt 9 passing through the lock 5 and the circular hole on the enclosure baffle 1 to prevent unauthorized personnel from moving the sample. The entire containment steel lining nuclear grade coating supervision component installation device is anchored to the concrete ground by the expansion bolt 8, and finally the nameplate is hung to complete the installation of the containment steel lining nuclear grade coating supervision component 10.

Claims

1. A device for installing nuclear grade coating monitoring parts for containment steel lining, characterized in that: The device includes two enclosure baffles, supporting columns, limiting slot plates, cover plate connecting hinges and cover plates. The enclosure baffles are hollow rectangular structures. The two enclosure baffles are welded and connected by several supporting columns. Several limiting slot plates are arranged inside the enclosure baffles. The enclosure baffles are welded to both ends of the limiting slot plates. A containment steel lining nuclear-grade coating supervision part is placed between the two adjacent limiting slot plates; the top of the upper enclosure baffle is connected to the cover plate through the cover plate connecting hinge.

2. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 1 is characterized in that: A cover plate lock is welded on the side of the cover plate opposite to the cover plate connecting hinge. The cover plate lock can be connected to the upper enclosure baffle through connecting bolts, and the cover plate lock is used to lock the cover plate.

3. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 1 is characterized in that: The device is further provided with a slot support plate, which connects the upper enclosure baffle and the corresponding limiting slot plate in the lower enclosure baffle, and is used to support the limiting slot plate.

4. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 1 is characterized in that: The limiting slot plate is provided with a plurality of slots, which are used to place the nuclear-grade coating supervision parts of the containment steel lining. The slot width is 10 mm and the depth is 15 mm. The limiting slot plate and the enclosure baffle are intermittently spot welded. The number and width of the slots of the limiting slot plate are determined by the number and size of the nuclear-grade coating supervision parts of the containment steel lining.

5. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 1 is characterized in that: The devices are all made of stainless steel, and the stainless steel is pickled and passivated.

6. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 1, characterized in that: The support column is provided with a trapezoidal rib, and the trapezoidal rib is connected to the support column by full butt welding.

7. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 1 is characterized in that: A nameplate is also provided on the outside of the device, and the nameplate information includes the information of the steel lining nuclear grade coating supervision part and the person in charge of management.

8. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 1 is characterized in that: The support columns are fixed to the ground by expansion bolts, and the device is fixed parallel to the radial direction of the containment and placed in the irradiation hotspot area of ​​the containment corridor; the height of the nuclear-grade coating supervision part of the containment steel lining is used to determine the height of the support columns and the welding position between the enclosure baffle and the support columns.

9. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 8, characterized in that: The tension and shear forces at the expansion bolts both meet seismic requirements.

10. The device for installing nuclear grade coating monitoring parts for containment steel lining according to claim 2, characterized in that: The shear force at the connecting bolts meets the seismic requirements.

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