CN110853776A - Nuclear power station electrical penetration assembly and installation method thereof - Google Patents
Nuclear power station electrical penetration assembly and installation method thereof Download PDFInfo
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- CN110853776A CN110853776A CN201910998769.XA CN201910998769A CN110853776A CN 110853776 A CN110853776 A CN 110853776A CN 201910998769 A CN201910998769 A CN 201910998769A CN 110853776 A CN110853776 A CN 110853776A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/032—Joints between tubes and vessel walls, e.g. taking into account thermal stresses
- G21C13/036—Joints between tubes and vessel walls, e.g. taking into account thermal stresses the tube passing through the vessel wall, i.e. continuing on both sides of the wall
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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 invention relates to a nuclear power station electrical penetration assembly, comprising: an electrical penetration having an inner end and an outer end; the first embedded sleeve penetrates through the containment and is fixedly connected with the containment, and/or the second embedded sleeve penetrates through the shielding wall and is fixedly connected with the shielding wall; a penetration holding portion located between the containment and the shielding wall for holding and fixing the electrical penetration, wherein: the inner end of the electric penetrating piece is located on the inner side of the containment, and the outer end of the electric penetrating piece is located on the outer side of the shielding wall and penetrates through the first embedded sleeve and the second embedded sleeve. The invention also relates to an installation method of the electrical penetration assembly of the nuclear power station.
Description
Technical Field
The embodiment of the invention relates to the field of nuclear power installation, in particular to a nuclear power station electrical penetration assembly and a nuclear power station electrical penetration assembly installation method.
Background
The electrical penetration provides an electrical connection function through the reactor containment as an important nuclear safety level related device and as part of the containment barrier, ensuring the integrity of the containment as a pressure barrier against the escape of radioactive fission products.
The existing installation mode of the electrical penetration piece for the nuclear power station is as follows:
1. embedded sleeve installation of electric penetration piece
And constructing the mounting elevation of the electrical penetration piece on the shielding wall, and embedding the sleeve of the electrical penetration piece according to the design position.
2. Mounting of electrical penetrations
And (4) transporting the electric penetration piece to the site, penetrating the electric penetration piece into the sleeve, welding the electric penetration piece with the sleeve, and carrying out related electric tests after welding.
The existing nuclear power station electrical penetration assembly is characterized in that: (1) only the shielding wall is provided with an embedded sleeve; (2) the electric penetration piece only penetrates through the shielding wall; (3) the electric penetration piece is directly welded with the containment steel lining and the embedded sleeve.
However, the containment vessel of the conventional nuclear power plant is spaced from the shield wall, and the installation method of the electrical penetration member cannot meet the installation requirement of the electrical penetration member.
Disclosure of Invention
The present invention has been made to solve or alleviate at least one aspect of the technical problems in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a nuclear power plant electrical penetration assembly, comprising:
an electrical penetration having an inner end and an outer end;
the first embedded sleeve penetrates through the containment and is fixedly connected with the containment;
the second embedded sleeve penetrates through the shielding wall and is fixedly connected with the shielding wall;
a penetration piece holding part positioned between the safety shell and the shielding wall and used for holding and fixing the electric penetration piece,
wherein:
the inner end of the electric penetrating piece is located on the inner side of the containment, and the outer end of the electric penetrating piece is located on the outer side of the shielding wall and penetrates through the first embedded sleeve and the second embedded sleeve.
Optionally, the penetrating member holding portion includes an extension sleeve and a holding ring, an inner end of the extension sleeve is a fixed end fixed to an outer end of the first embedded sleeve, an outer end of the extension sleeve is a connection end, the holding ring is sleeved and fixed on the electrical penetrating member, and the holding ring is matched with the connection end and fixed to the connection end.
Optionally, the penetration holding portion includes: the first retaining ring is coaxially arranged with the first embedded sleeve and sleeved on the electric penetrating piece and is fixedly connected to the outer end of the first embedded sleeve and the electric penetrating piece; and/or a second retaining ring coaxially arranged with the second embedded sleeve, wherein the second retaining ring is sleeved on the electric penetrating piece and is fixedly connected to the inner end of the second embedded sleeve and the electric penetrating piece.
According to another aspect of the embodiment of the invention, an installation method of the electrical penetration piece of the nuclear power station is provided, which comprises the following steps:
providing an electrical feedthrough having an inner end and an outer end;
respectively arranging a first embedded sleeve and a second embedded sleeve on the containment and the shielding wall;
providing a penetration holding portion for holding and fixing the electrical penetration;
inserting the electric penetration piece into the first embedded sleeve and the second embedded sleeve to be at a preset position, wherein the inner end of the electric penetration piece is positioned on the inner side of the containment and the outer end of the electric penetration piece is positioned on the outer side of the shielding wall at the preset position;
holding an electrical penetration in the predetermined position with the penetration holder.
Optionally, the penetration retainer comprises an extension sleeve and a retaining ring; and the method comprises the steps of: connecting one end of an extension sleeve with the end part of one of the first embedded sleeve and the second embedded sleeve between the shielding wall and the containment, and enabling the extension sleeve to be approximately aligned with the axial lines of the first embedded sleeve and the second embedded sleeve; inserting an electric penetration piece into the first embedded sleeve, the second embedded sleeve and the extension sleeve, wherein the inner end of the electric penetration piece is positioned on the inner side of the containment, and the outer end of the electric penetration piece is positioned on the outer side of the shielding wall; and fixedly connecting a retaining ring, which secures the boot to the electrical penetration, to the other end of the extension sleeve.
Optionally, the step of connecting one end of the extension sleeve with an end of one of the first embedded sleeve and the second embedded sleeve between the shielding wall and the safety shell includes: and connecting the inner end of the extension sleeve with the outer end of the first embedded sleeve.
Drawings
These and other features and advantages of the various embodiments of the disclosed invention will be better understood from the following description taken in conjunction with the accompanying drawings, in which like reference characters designate like parts throughout, and in which:
FIG. 1 is a schematic illustration of an installation of a nuclear power plant electrical penetration according to an exemplary embodiment of the present invention;
FIG. 2 is an assembly structure for mounting the electrical penetration of FIG. 1 in accordance with an exemplary embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the installation of an electrical penetration from the inside of a containment vessel with the outer end of the electrical penetration also inside the containment vessel in accordance with an exemplary embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the installation of an electrical penetration from the inside of a containment vessel with the outer end of the electrical penetration at a shield wall sleeve and supported by a slider disposed in the sleeve, according to an exemplary embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating installation of an electrical penetration from the inside of a containment vessel with the outer end of the electrical penetration within a shield wall sleeve and supported by a slide disposed in the sleeve, the outboard support cart and counterweight of FIG. 4 having been removed, according to an exemplary embodiment of the present invention.
The reference numbers are as follows:
10-CV 12-CV sleeve 13-reinforcing plate 20-shielding wall 22-shielding wall sleeve 30-electric penetration piece 32-CV side flange 34-shielding wall side flange 35-protective cover 36-protective cover 40-extension sleeve 50-support 51-inner trolley 52-outer trolley 60-protective cover 70-counterweight 80-welding ring 91-rail 92-sliding block 100-chain block
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.
A method of installing a nuclear power plant electrical penetration according to an exemplary embodiment of the present invention is described in detail below with reference to fig. 1-5.
Firstly, checking the concentricity of the embedded sleeve.
Before the operation of installing the electric penetration pieces is started, the positions of the embedded sleeve or CV sleeve 12 of the reactor CV (containment vessel) 10 and the embedded sleeve or shield wall sleeve 22 of the auxiliary plant shield wall 20 are measured and checked, for example, whether the center deviation of the two circles is not more than 1/2 inches is checked.
In the example shown in fig. 2-5, the electrical penetrations 30 are installed through the containment vessel to the shield wall 20 and are connected to the CV 10 by welding with extension sleeves 40 to serve to secure the electrical penetrations 30, as shown in the general view of fig. 1.
Second, electrical through-penetration flange mounting is performed.
The electrical through-penetration flange mounts are divided into CV side flange 32 and shield side flange mounts 34.
1. CV side flange 32 mounting
Before installation, the corresponding welding grooves on the flange 32 and the CV sleeve 12 and impurities such as rust, oil stain, paint and the like in the area of 25mm on the periphery are removed completely. During the installation and welding process, attention should be paid to the protection of the flange surface. The flange 32 is threaded onto the CV tube 12 with a suitable tool to adjust the perpendicularity of the flange, for example, to ensure 0 ° alignment. And (5) positioning and welding the flange from the outer side. The number of the positioning welding points is not less than 3, and the positioning welding points are distributed approximately uniformly. The length of each positioning welding is not less than 50mm, and the size is not more than the design size of the formal welding seam.
When the outer side is welded, the welding seam is divided into 4 stations for welding, the bottoming welding bead needs to be subjected to liquid penetration, and subsequent welding can be carried out after defect-free inspection. And finally, the welding seam needs visual detection, liquid penetration detection and ray detection.
After the radiographic inspection of the butt weld between the CV side flange 32 and the CV 10 is finished, the flange and the corner joint of the sleeve are welded, the bottoming weld bead needs to be subjected to liquid penetration, and subsequent welding can be carried out after the defect is detected. And finally, the welding seam needs visual detection and liquid permeation detection.
And after the CV side flange 32 is installed and welded, paint repair is carried out on the flange according to a paint repair construction scheme.
2. Mounting of side flange of shielding wall
The shield wall side flange 34 is mounted in the same process as the CV side flange 32.
Third, extension sleeve installation is performed.
During installation care is taken to distinguish the ends of the extension sleeve 40, see fig. 2. The extension sleeve 40 is fixed from the outside by a support, the extension sleeve 40 is assembled with the CV sleeve 12, the gap and the misalignment of the welding line are adjusted, and the straightness (indirectly reflecting the verticality) of the extension sleeve 40 relative to the CV sleeve is not more than 5 mm.
Preferably, the tack welds are less than 3 and substantially evenly distributed when tack welding the extension sleeve 40. And during formal welding, the welding seam is divided into 4 stations for welding. And detecting the liquid permeation of the priming coat, and performing subsequent welding after detecting no defect. After welding, the welding seam needs visual detection, liquid penetration detection and ray detection.
Fourthly, the installation of the electric penetration piece body is executed.
Based on the configuration of fig. 1, the body mount of the electrical penetration 30 can take two forms of penetration from the inside of the CV and penetration from the outside of the shield wall.
1. The electric penetration piece body is penetrated from the inner side of the CV and installed
The mounting bracket 50 and scaffolding are set up within the CV, the guide rails are placed 91-within the sleeves on the shielded wall, and the weld rings 80 are placed on the ends of the extension sleeves 40, see fig. 3.
The electrical penetration is placed on the inner 51 and outer 52 trolleys and a weight 70 is added to the end having the protective sleeve 60, and the electrical penetration 30 is carefully pushed into the CV tube 12, see fig. 3. Penetration is stopped when the trolley 52 approaches the CV tube 12. The jack is then used to jack the electrical penetration 30 and move the outboard trolley 52 away from the CV tube 12, but it must be ensured that the center of gravity of the electrical penetration 30 and counterweight 70 must be located between the two trolleys.
When the outer end terminal of the electrical feedthrough 30 is passed through the extension sleeve 40, a solder ring 80 is threaded onto the electrical feedthrough 30, see FIG. 4, to avoid as much damage as possible to the paint on the electrical feedthrough.
When the outer end of the electrical feedthrough 30 is threaded into the shield wall bushing 22, the outer end of the electrical feedthrough 30 rests on a slide 92 (see fig. 3 and 4) within the shield wall bushing 22.
When the slider 92 bears the weight of the electrical penetration 30, the weight 70 at the inner end of the electrical penetration is removed. The electric penetration assembly 30 is lifted slightly by the chain block 100 on the welding ring 80, the outer trolley 52 below the electric penetration assembly 30 is moved, the outer end of the electric penetration assembly 30 is placed on the slide block 92 again, and the penetration is continued, as shown in fig. 5.
When the solder ring 80 is located at the position of the mark line (determined in advance) on the electrical penetration 30, the solder ring 80 is tack-welded to the electrical penetration 30 from the side of the shield wall 20. After the electrical penetration is moved to make the welding ring 80 approach the shielding wall 20, the welding ring seam close to the inner end side is welded first, and then the welding ring seam close to the shielding wall side is welded, and the welding ring 80 is formally welded on the electrical penetration 30. The welding ring can be fixed by adopting positioning welding, or by adopting a magnet, a clamp and the like. The tack weld fillet size is not greater than the final fillet size.
The welding ring 80 is formally welded from the CV 10 side by dividing the weld into 2 stations and welding in the order of the stations. And (3) detecting liquid permeation on the bottom layer, carrying out subsequent welding after detecting no defect, and detecting a welding line by visual inspection and liquid permeation after welding.
After the weld NDE (non-destructive evaluation) between the welding ring 80 and the electrical penetration 30 is completed, the electrical penetration 30 is repainted, and after the repainting is completed, the welding ring 80 and the extension sleeve 40 are installed and welded.
Thereafter, the electric penetration 30 is slightly lifted by the chain block 100, the rail 91 and the slider 92 (the rail and the slider together serve as an example of a translational support member) inside the shield wall sleeve 22 are taken out, and the outer end of the shield wall sleeve 22 is closed. The chain block 100 is then used to move the electrical penetration 30 so that the weld ring 80 is inserted into the extension sleeve 40, at which point the protective sleeve 60 and the inner trolley 51 at the inner end of the electrical penetration are removed, and the subsequent state is shown in fig. 5.
In the illustrated example of the invention, for the weld ring 80 and the extension sleeve 40, the outer wall of the weld ring has an outside mating surface and the inner wall of the extension sleeve has an inside mating surface that are positively mated to each other as shown. In the present invention, the positive fit may be applied to the fit between other axially connected components. As can be appreciated by those skilled in the art, the positive fit leaves room or a portion for welding in the event that welding is required.
In the state of fig. 5, both ends of the electrical penetration member 30 are fixed, and the ring 80 and the extension sleeve 40 are tack-welded. The number of the positioning welding points is not less than 3, and the positioning welding points are distributed approximately uniformly. The length of each positioning welding is not less than 50mm, and the size is not more than the design size of the formal welding seam. Tack welding as a formal weld, the backing shield should be applied before welding (or tack welding) the extension sleeve 40 to the weld ring 80, and the backing shield gas must be maintained to a deposition thickness of at least 5mm to prevent backing oxidation. After formal welding, the welding seam is divided into 4 stations for welding, the priming coat needs liquid permeation detection, and subsequent welding is carried out after no defect is detected. After welding, the welding seam needs visual detection, liquid permeation detection and ultrasonic detection.
After the weld between the weld ring 80 and the extension sleeve 40 is completed, the chain block may be removed.
2. Mounting an electrical feedthrough body from the outside of a shield wall
First, the penetration electrical penetrations are transported into the auxiliary plant with a forklift or cart, and appropriate protective measures are taken to protect the electrical penetrations wires (outlets). And erecting a mounting bracket and a scaffold in the auxiliary workshop.
Next, the electrical penetration 30 is placed on a bracket (not shown) (note distinguishing the inner and outer ends of the electrical penetration) and carefully pushed into the shield wall sleeve 22.
When the solder ring 80 is passed out of the shield wall bushing 22, the solder ring 80 is inserted into the extension bushing 40 after the electrical penetration 30 is lifted up by the chain block 100.
After the electrical penetration assembly 30 is moved to make the welding ring close to the shielding wall, the welding ring seam close to the inner end side is welded first, then the welding ring seam close to the shielding wall side is welded, and the welding ring is formally welded on the electrical penetration assembly. The welding ring can be fixed by adopting positioning welding, or by adopting a magnet, a clamp and the like. The tack weld fillet size is not greater than the final fillet size. The formal welding of the welding ring starts from one side of CV, the welding seam is divided into 2 stations for welding, and the welding is carried out according to the welding sequence of the stations. And (3) detecting liquid permeation on the bottom layer, carrying out subsequent welding after detecting no defect, and detecting a welding line by visual inspection and liquid permeation after welding.
And (3) after the NDE (nondestructive evaluation) of the welding seam between the welding ring and the electric penetration piece is finished, paint repairing is carried out on the electric penetration piece, and after the paint repairing is finished, the welding ring and the extension sleeve are installed and welded.
And then slightly lifting the electric penetration piece by using a chain block, taking out the track and the slide block in the shielding wall sleeve, and sealing the outer end of the shielding wall sleeve.
Then, referring to FIG. 5, tack welds the ring 80 and the extension sleeve 40. The number of the positioning welding points is not less than 3, and the positioning welding points are distributed approximately uniformly. The length of each positioning welding is not less than 50mm, and the size is not more than the design size of the formal welding seam. Tack welding is a formal weld where the backing shield is applied prior to welding (or tack welding) the extension sleeve to the weld ring, and the backing shield gas is maintained to a deposition thickness of at least 5mm to prevent backing oxidation. After formal welding, the welding seam is divided into 4 stations for welding, the priming coat needs liquid permeation detection, and subsequent welding is carried out after no defect is detected. After welding, the welding seam needs visual detection, liquid permeation detection and ultrasonic detection.
After the weld between the weld ring 80 and the extension sleeve 40 is complete, the chain block 100 may be removed.
It is to be noted that, based on the structure of fig. 1, for example, the timing of the attachment of the solder ring needs to be determined according to the manner of attachment of the electrical penetration. If the electrical penetration penetrates from the inside of the CV, the solder ring must be installed to solder the electrical penetration when it is installed. If the electrical penetration is threaded from the outside of the shield wall, the solder ring may be attached and soldered to the electrical penetration prior to installation of the electrical penetration, or may be attached and soldered during installation of the electrical penetration.
In the present invention, the retaining ring or the weld ring has a width in the axial direction, which may range, for example, from 80 to 120 mm. The width may be 80mm, 100mm or 120 mm. This width facilitates retention of the electrical feedthrough with the solder ring.
In the invention, the containment embedded sleeve is a first embedded sleeve, the shielding wall embedded sleeve is a second embedded sleeve, and the welding ring corresponds to a specific example of the retaining ring.
In the present invention, the inner end corresponds to the end near the inside of the containment vessel, while the outer end corresponds to the end away from the containment vessel. The inside and outside are relative to which side is closer to the inside of the containment vessel.
It is noted that in the example of fig. 1-5, the extension sleeve and the weld ring (retaining ring) act as a retaining portion for the electrical feedthrough. However, the present invention is not limited thereto, and the extension sleeve may be provided on the second insert sleeve.
As will be appreciated by those skilled in the art, although not shown, two extension sleeves and two retaining rings may be provided, i.e. one extension sleeve connected to each of the embedment sleeves and one retaining ring connected to each of the extension sleeves. In the case where two retaining rings are provided, the two may be adjacent to each other or of an integral structure, or spaced apart from each other in the axial direction.
It is also possible to place the retaining ring directly on the embedment sleeve (i.e. without the extension sleeve).
It is also possible to provide the retaining ring alone without the extension sleeve, but the retaining ring is held stationary by a member provided on the containment or shield wall.
As shown, the extension sleeve 40 and the CV sleeve 22 connected thereto are coaxially arranged and have the same inner diameter.
In the previous embodiments, the connection between the components was by welding, and other suitable fastening means may be used as will be appreciated by those skilled in the art.
As shown in fig. 1, the pre-buried sleeves are each provided with a flange 32/34 and a protective shield 35/36. The flange and the protective cover may not be provided.
It is also noted that the mounting of the electrical penetration is not limited to the above-mentioned manner. Different mounting manners are possible depending on the structure of the penetration retainer. For example, an extension sleeve may be provided over the shield wall sleeve, in which case steps similar to those shown in FIGS. 1-5 may be employed.
In the present invention, the support for the translation of the electrical penetration may be in the form of a trolley or a slide, but also in other forms, such as a roller support or a bearing support, provided that it is possible to support the electrical penetration and to facilitate the translation of the electrical penetration, all within the scope of protection of the present invention.
Based on the above, the invention provides the following technical scheme:
1. a nuclear power plant electrical penetration assembly comprising:
an electrical penetration having an inner end and an outer end;
the first embedded sleeve penetrates through the containment and is fixedly connected with the containment;
the second embedded sleeve penetrates through the shielding wall and is fixedly connected with the shielding wall;
a penetration piece holding part positioned between the safety shell and the shielding wall and used for holding and fixing the electric penetration piece,
wherein:
the inner end of the electric penetrating piece is located on the inner side of the containment, and the outer end of the electric penetrating piece is located on the outer side of the shielding wall and penetrates through the first embedded sleeve and the second embedded sleeve.
2. The assembly of claim 1, wherein:
the penetrating piece retaining part comprises an extension sleeve and a retaining ring, the inner end of the extension sleeve is a fixed end fixed to the outer end of the first embedded sleeve, the outer end of the extension sleeve is a connecting end, the retaining ring is sleeved and fixed on the electric penetrating piece, and the retaining ring is matched with the connecting end and fixed to the connecting end.
3. The assembly of claim 2, wherein:
the inner diameter of the second embedded sleeve is larger than that of the first embedded sleeve.
4. The assembly of claim 1, wherein:
the penetrating piece retaining part comprises an extension sleeve and a retaining ring, the outer end of the extension sleeve is a fixed end fixed to the inner end of the second embedded sleeve, the inner end of the extension sleeve is a connecting end, the retaining ring is sleeved and fixed on the electric penetrating piece, and the retaining ring is matched with the connecting end and fixed to the connecting end.
5. The assembly of claim 4, wherein:
the inner diameter of the first embedded sleeve is larger than that of the second embedded sleeve.
6. The assembly of claim 1, wherein:
the through-member retaining portion including a first extension sleeve, a second extension sleeve, a first retaining ring, and a second retaining ring;
the inner end of the first extension sleeve is a first fixed end fixed to the outer end of the first embedded sleeve, the outer end of the first extension sleeve is a first connecting end, the first retaining ring is sleeved and fixed on the electric penetration piece, and the first retaining ring is matched with the first connecting end and fixed to the first connecting end;
the outer end of the second extension sleeve is a second fixed end fixed to the inner end of the second embedded sleeve, the inner end of the second extension sleeve is a second connecting end, the second retaining ring is sleeved and fixed on the electric penetration piece, and the second retaining ring is matched with the second connecting end and fixed to the second connecting end.
7. The assembly of claim 6, wherein:
the first retaining ring and the second retaining ring are adjacent to each other or are of an integral structure; or
The first and second retaining rings are spaced apart from each other in an axial direction of the electrical penetration.
8. The assembly of any of claims 2-7, wherein:
in the retaining ring and the extension sleeve which are matched with each other, the outer wall of the retaining ring is provided with an outer side matching surface, the inner wall of the extension sleeve is provided with an inner side matching surface, and the inner side matching surface and the outer side matching surface are matched with each other in a molded mode.
9. The assembly of claim 8, wherein:
the retaining rings and the electric penetration pieces which are connected with each other, the retaining rings and the extension sleeves which are connected with each other, and the extension sleeves and the corresponding embedded sleeves which are connected with each other are all fixed by adopting welding connection.
10. The assembly of any of claims 2-7, wherein:
the extension sleeve and the corresponding embedded sleeves in the first embedded sleeve and the second embedded sleeve connected with the extension sleeve are coaxially arranged and have the same inner diameter.
11. The assembly of claim 1, wherein:
the penetrating piece holding part comprises a holding ring and a fixing piece, the holding ring is sleeved and fixed on the electric penetrating piece, one end of the fixing piece is fixedly connected to the holding ring, and the other end of the fixing piece is connected to the inner wall of the shielding wall and/or the outer wall of the containment.
12. The assembly of claim 1, wherein:
the penetration holding portion includes:
the first retaining ring is coaxially arranged with the first embedded sleeve and sleeved on the electric penetrating piece and is fixedly connected to the outer end of the first embedded sleeve and the electric penetrating piece; and/or
And the second retaining ring is sleeved on the electric penetrating piece and is fixedly connected to the inner end of the second embedded sleeve and the electric penetrating piece.
13. The assembly of any of claims 2-12, wherein:
the width of the retaining ring is in the range of 80-120 mm.
14. The assembly of claim 1, wherein:
the electric penetration piece, the first embedded sleeve and the second embedded sleeve are arranged coaxially.
15. The assembly of any one of claims 1-14, wherein:
the inner end of the first embedded sleeve is provided with a first flange and a first protection cover arranged on the first flange, and the first protection cover limits a first containing space surrounding the inner end of the electric penetration piece; and/or
The outer end of the second embedded sleeve is provided with a second flange and a second protective cover arranged on the second flange, and the second protective cover limits a second containing space surrounding the outer end of the electric penetration piece.
16. A method of installing a nuclear power plant electrical penetration, comprising the steps of:
providing an electrical feedthrough having an inner end and an outer end;
respectively arranging a first embedded sleeve and a second embedded sleeve on the containment and the shielding wall;
providing a penetration holding portion for holding and fixing the electrical penetration;
inserting the electric penetration piece into the first embedded sleeve and the second embedded sleeve to be at a preset position, wherein the inner end of the electric penetration piece is positioned on the inner side of the containment and the outer end of the electric penetration piece is positioned on the outer side of the shielding wall at the preset position;
holding an electrical penetration in the predetermined position with the penetration holder.
17. The method of claim 16, wherein:
the penetration retainer includes an extension sleeve and a retaining ring; and is
The method comprises the following steps:
connecting one end of an extension sleeve with the end part of one of the first embedded sleeve and the second embedded sleeve between the shielding wall and the containment, and enabling the extension sleeve to be approximately aligned with the axial lines of the first embedded sleeve and the second embedded sleeve;
inserting an electric penetration piece into the first embedded sleeve, the second embedded sleeve and the extension sleeve, wherein the inner end of the electric penetration piece is positioned on the inner side of the containment, and the outer end of the electric penetration piece is positioned on the outer side of the shielding wall;
a retaining ring securing the boot to the electrical penetration is fixedly attached to the other end of the extension sleeve.
18. The method of claim 17, wherein:
the step of connecting one end of the extension sleeve with the end part of one of the first embedded sleeve and the second embedded sleeve between the shielding wall and the safety shell comprises the following steps: and connecting the inner end of the extension sleeve with the outer end of the first embedded sleeve.
19. The method of 18, wherein:
"insert electric penetration piece in first buried sleeve pipe, second buried sleeve pipe and extension sleeve pipe, and the inner of electric penetration piece is in the inboard of containment, and the outer end of electric penetration piece is in the outside of shielding wall" includes the step:
(a) providing an inner support and an outer support which can move along the axis of the first embedded sleeve for the electric penetration piece, enabling the electric penetration piece to move close to the inner end of the first embedded sleeve in a translation mode on the inner side of the containment, and enabling the axis of the electric penetration piece to be approximately aligned with the axis of the first embedded sleeve;
(b) translating the outer support towards the inner support to increase the axial distance between the outer support and the outer end of the electrical penetration, and using a counterweight placed between the inner support and the outer support and acting on the electrical penetration so that the center of gravity of the counterweight together with the electrical penetration remains between the inner support and the outer support in the axial direction of the first pre-buried sleeve;
(c) continuing to translate the electric penetration piece towards the second embedded sleeve, so that the outer end of the electric penetration piece moves out of the outer end of the extension sleeve, and the outer end of the electric penetration piece penetrates through the retaining ring;
(d) placing the outer end of the electric penetration piece on the translation supporting piece in the second embedded sleeve, and removing the outer side support and the balance weight;
(e) translating the electric penetration piece towards the outer side of the shielding wall, so that the inner end of the electric penetration piece is positioned at the inner side of the containment, and the outer end of the electric penetration piece is positioned at the outer side of the shielding wall;
(f) the medial support and the translation support are removed.
20. The method of 18, wherein:
"insert electric penetration piece in first buried sleeve pipe, second buried sleeve pipe and extension sleeve pipe, and the inner of electric penetration piece is in the inboard of containment, and the outer end of electric penetration piece is in the outside of shielding wall" includes the step:
(a) arranging a translation supporting piece in the second embedded sleeve;
(b) enabling the electric penetration piece to move horizontally on the outer side of the shielding wall to be close to the outer end of the second embedded sleeve, wherein a retaining ring is fixed on the electric penetration piece, and the axis of the electric penetration piece is approximately aligned with the axis of the second embedded sleeve;
(c) continuing to translate the electric penetration piece towards the first embedded sleeve to enable the inner end of the electric penetration piece to move out of the inner end of the second embedded sleeve;
(d) continuing to translate the electrical penetration towards the inside of the containment vessel such that the inner end of the electrical penetration moves into the extension sleeve;
(e) continuing to translate the electric penetration piece towards the inner side of the containment vessel, so that the retaining ring is in butt joint fit with the extension sleeve, at the moment, the inner end of the electric penetration piece is positioned at the inner side of the containment vessel, and the outer end of the electric penetration piece is positioned at the outer side of the shielding wall;
(f) the translating support is removed.
21. The method of claim 17, wherein:
the step of connecting one end of the extension sleeve with the end part of one of the first embedded sleeve and the second embedded sleeve between the shielding wall and the safety shell comprises the following steps: and connecting the outer end of the extension sleeve with the inner end of the second embedded sleeve.
Based on the technical scheme of the invention, the installation of the electrical penetration piece can be realized under the condition that a larger distance exists between the containment vessel of the nuclear power station and the shielding wall. For example, for a third-generation nuclear power plant, the distance between the containment and the shielding wall is about 1.3 meters, and the technical scheme provided by the invention can successfully solve the problem that the electrical penetration piece passes through the containment and the shielding wall for installation.
In a specific technical scheme provided by the invention, the reliable installation of the electric penetration piece is ensured through the embedded sleeve, the extension sleeve and the welding ring.
The technical scheme of the invention can provide the electrical connection function penetrating through the containment vessel of the reactor, and simultaneously can use the electrical penetration piece as a part of the containment vessel barrier, thereby ensuring the integrity of the containment vessel as a pressure barrier and preventing the radioactive fission product from leaking.
Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (21)
1. A nuclear power plant electrical penetration assembly comprising:
an electrical penetration having an inner end and an outer end;
the first embedded sleeve penetrates through the containment and is fixedly connected with the containment;
the second embedded sleeve penetrates through the shielding wall and is fixedly connected with the shielding wall;
a penetration piece holding part positioned between the safety shell and the shielding wall and used for holding and fixing the electric penetration piece,
wherein:
the inner end of the electric penetrating piece is located on the inner side of the containment, and the outer end of the electric penetrating piece is located on the outer side of the shielding wall and penetrates through the first embedded sleeve and the second embedded sleeve.
2. The assembly of claim 1, wherein:
the penetrating piece retaining part comprises an extension sleeve and a retaining ring, the inner end of the extension sleeve is a fixed end fixed to the outer end of the first embedded sleeve, the outer end of the extension sleeve is a connecting end, the retaining ring is sleeved and fixed on the electric penetrating piece, and the retaining ring is matched with the connecting end and fixed to the connecting end.
3. The assembly of claim 2, wherein:
the inner diameter of the second embedded sleeve is larger than that of the first embedded sleeve.
4. The assembly of claim 1, wherein:
the penetrating piece retaining part comprises an extension sleeve and a retaining ring, the outer end of the extension sleeve is a fixed end fixed to the inner end of the second embedded sleeve, the inner end of the extension sleeve is a connecting end, the retaining ring is sleeved and fixed on the electric penetrating piece, and the retaining ring is matched with the connecting end and fixed to the connecting end.
5. The assembly of claim 4, wherein:
the inner diameter of the first embedded sleeve is larger than that of the second embedded sleeve.
6. The assembly of claim 1, wherein:
the through-member retaining portion including a first extension sleeve, a second extension sleeve, a first retaining ring, and a second retaining ring;
the inner end of the first extension sleeve is a first fixed end fixed to the outer end of the first embedded sleeve, the outer end of the first extension sleeve is a first connecting end, the first retaining ring is sleeved and fixed on the electric penetration piece, and the first retaining ring is matched with the first connecting end and fixed to the first connecting end;
the outer end of the second extension sleeve is a second fixed end fixed to the inner end of the second embedded sleeve, the inner end of the second extension sleeve is a second connecting end, the second retaining ring is sleeved and fixed on the electric penetration piece, and the second retaining ring is matched with the second connecting end and fixed to the second connecting end.
7. The assembly of claim 6, wherein:
the first retaining ring and the second retaining ring are adjacent to each other or are of an integral structure; or
The first and second retaining rings are spaced apart from each other in an axial direction of the electrical penetration.
8. The assembly of any one of claims 2-7, wherein:
in the retaining ring and the extension sleeve which are matched with each other, the outer wall of the retaining ring is provided with an outer side matching surface, the inner wall of the extension sleeve is provided with an inner side matching surface, and the inner side matching surface and the outer side matching surface are matched with each other in a molded mode.
9. The assembly of claim 8, wherein:
the retaining rings and the electric penetration pieces which are connected with each other, the retaining rings and the extension sleeves which are connected with each other, and the extension sleeves and the corresponding embedded sleeves which are connected with each other are all fixed by adopting welding connection.
10. The assembly of any one of claims 2-7, wherein:
the extension sleeve and the corresponding embedded sleeves in the first embedded sleeve and the second embedded sleeve connected with the extension sleeve are coaxially arranged and have the same inner diameter.
11. The assembly of claim 1, wherein:
the penetrating piece holding part comprises a holding ring and a fixing piece, the holding ring is sleeved and fixed on the electric penetrating piece, one end of the fixing piece is fixedly connected to the holding ring, and the other end of the fixing piece is connected to the inner wall of the shielding wall and/or the outer wall of the containment.
12. The assembly of claim 1, wherein:
the penetration holding portion includes:
the first retaining ring is coaxially arranged with the first embedded sleeve and sleeved on the electric penetrating piece and is fixedly connected to the outer end of the first embedded sleeve and the electric penetrating piece; and/or
And the second retaining ring is sleeved on the electric penetrating piece and is fixedly connected to the inner end of the second embedded sleeve and the electric penetrating piece.
13. The assembly of any of claims 2-12, wherein:
the width of the retaining ring is in the range of 80-120 mm.
14. The assembly of claim 1, wherein:
the electric penetration piece, the first embedded sleeve and the second embedded sleeve are arranged coaxially.
15. The assembly of any one of claims 1-14, wherein:
the inner end of the first embedded sleeve is provided with a first flange and a first protection cover arranged on the first flange, and the first protection cover limits a first containing space surrounding the inner end of the electric penetration piece; and/or
The outer end of the second embedded sleeve is provided with a second flange and a second protective cover arranged on the second flange, and the second protective cover limits a second containing space surrounding the outer end of the electric penetration piece.
16. A method of installing a nuclear power plant electrical penetration, comprising the steps of:
providing an electrical feedthrough having an inner end and an outer end;
respectively arranging a first embedded sleeve and a second embedded sleeve on the containment and the shielding wall;
providing a penetration holding portion for holding and fixing the electrical penetration;
inserting the electric penetration piece into the first embedded sleeve and the second embedded sleeve to be at a preset position, wherein the inner end of the electric penetration piece is positioned on the inner side of the containment and the outer end of the electric penetration piece is positioned on the outer side of the shielding wall at the preset position;
holding an electrical penetration in the predetermined position with the penetration holder.
17. The method of claim 16, wherein:
the penetration retainer includes an extension sleeve and a retaining ring; and is
The method comprises the following steps:
connecting one end of an extension sleeve with the end part of one of the first embedded sleeve and the second embedded sleeve between the shielding wall and the containment, and enabling the extension sleeve to be approximately aligned with the axial lines of the first embedded sleeve and the second embedded sleeve;
inserting an electric penetration piece into the first embedded sleeve, the second embedded sleeve and the extension sleeve, wherein the inner end of the electric penetration piece is positioned on the inner side of the containment, and the outer end of the electric penetration piece is positioned on the outer side of the shielding wall;
a retaining ring securing the boot to the electrical penetration is fixedly attached to the other end of the extension sleeve.
18. The method of claim 17, wherein:
the step of connecting one end of the extension sleeve with the end part of one of the first embedded sleeve and the second embedded sleeve between the shielding wall and the safety shell comprises the following steps: and connecting the inner end of the extension sleeve with the outer end of the first embedded sleeve.
19. The method of claim 18, wherein:
"insert electric penetration piece in first buried sleeve pipe, second buried sleeve pipe and extension sleeve pipe, and the inner of electric penetration piece is in the inboard of containment, and the outer end of electric penetration piece is in the outside of shielding wall" includes the step:
(a) providing an inner support and an outer support which can move along the axis of the first embedded sleeve for the electric penetration piece, enabling the electric penetration piece to move close to the inner end of the first embedded sleeve in a translation mode on the inner side of the containment, and enabling the axis of the electric penetration piece to be approximately aligned with the axis of the first embedded sleeve;
(b) translating the outer support towards the inner support to increase the axial distance between the outer support and the outer end of the electrical penetration, and using a counterweight placed between the inner support and the outer support and acting on the electrical penetration so that the center of gravity of the counterweight together with the electrical penetration remains between the inner support and the outer support in the axial direction of the first pre-buried sleeve;
(c) continuing to translate the electric penetration piece towards the second embedded sleeve, so that the outer end of the electric penetration piece moves out of the outer end of the extension sleeve, and the outer end of the electric penetration piece penetrates through the retaining ring;
(d) placing the outer end of the electric penetration piece on the translation supporting piece in the second embedded sleeve, and removing the outer side support and the balance weight;
(e) translating the electric penetration piece towards the outer side of the shielding wall, so that the inner end of the electric penetration piece is positioned at the inner side of the containment, and the outer end of the electric penetration piece is positioned at the outer side of the shielding wall;
(f) the medial support and the translation support are removed.
20. The method of claim 18, wherein:
"insert electric penetration piece in first buried sleeve pipe, second buried sleeve pipe and extension sleeve pipe, and the inner of electric penetration piece is in the inboard of containment, and the outer end of electric penetration piece is in the outside of shielding wall" includes the step:
(a) arranging a translation supporting piece in the second embedded sleeve;
(b) enabling the electric penetration piece to move horizontally on the outer side of the shielding wall to be close to the outer end of the second embedded sleeve, wherein a retaining ring is fixed on the electric penetration piece, and the axis of the electric penetration piece is approximately aligned with the axis of the second embedded sleeve;
(c) continuing to translate the electric penetration piece towards the first embedded sleeve to enable the inner end of the electric penetration piece to move out of the inner end of the second embedded sleeve;
(d) continuing to translate the electrical penetration towards the inside of the containment vessel such that the inner end of the electrical penetration moves into the extension sleeve;
(e) continuing to translate the electric penetration piece towards the inner side of the containment vessel, so that the retaining ring is in butt joint fit with the extension sleeve, at the moment, the inner end of the electric penetration piece is positioned at the inner side of the containment vessel, and the outer end of the electric penetration piece is positioned at the outer side of the shielding wall;
(f) the translating support is removed.
21. The method of claim 17, wherein:
the step of connecting one end of the extension sleeve with the end part of one of the first embedded sleeve and the second embedded sleeve between the shielding wall and the safety shell comprises the following steps: and connecting the outer end of the extension sleeve with the inner end of the second embedded sleeve.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202662301U (en) * | 2012-07-12 | 2013-01-09 | 中国核动力研究设计院 | Cable penetration device for double-layer containment |
| CN202930053U (en) * | 2012-12-05 | 2013-05-08 | 中国核动力研究设计院 | Double-cylinder component-based electrical penetration assembly used for double-layer containment vessels |
| CN203118514U (en) * | 2013-03-26 | 2013-08-07 | 中国核动力研究设计院 | Shell and flange combined electrical penetration assembly for double-wall containment of reactor |
| CN104867525A (en) * | 2015-05-14 | 2015-08-26 | 上海核工程研究设计院 | Medium voltage electric penetration assembly with thermocouple temperature measuring assembly |
| US20160049212A1 (en) * | 2014-08-18 | 2016-02-18 | Westinghouse Electric Company Llc | Method for In-Core Instrumentation Withdrawal From the Core of a Pressurized Water Reactor |
| CN106128523A (en) * | 2016-08-10 | 2016-11-16 | 长江勘测规划设计研究有限责任公司 | A kind of underground nuclear power station fluid-tight electrical penetration system |
| CN106165021A (en) * | 2014-02-26 | 2016-11-23 | 阿托门纳哥普勒科特工程合资（控股）公司 | Through nuclear power plant containment shell exterior wall and the sealing entrance cable device of interior wall |
| CN108599023A (en) * | 2018-04-20 | 2018-09-28 | 国核工程有限公司 | Nuclear power station radiation areas cable tie method |
-
2019
- 2019-10-21 CN CN201910998769.XA patent/CN110853776B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202662301U (en) * | 2012-07-12 | 2013-01-09 | 中国核动力研究设计院 | Cable penetration device for double-layer containment |
| CN202930053U (en) * | 2012-12-05 | 2013-05-08 | 中国核动力研究设计院 | Double-cylinder component-based electrical penetration assembly used for double-layer containment vessels |
| CN203118514U (en) * | 2013-03-26 | 2013-08-07 | 中国核动力研究设计院 | Shell and flange combined electrical penetration assembly for double-wall containment of reactor |
| CN106165021A (en) * | 2014-02-26 | 2016-11-23 | 阿托门纳哥普勒科特工程合资（控股）公司 | Through nuclear power plant containment shell exterior wall and the sealing entrance cable device of interior wall |
| US20160049212A1 (en) * | 2014-08-18 | 2016-02-18 | Westinghouse Electric Company Llc | Method for In-Core Instrumentation Withdrawal From the Core of a Pressurized Water Reactor |
| CN104867525A (en) * | 2015-05-14 | 2015-08-26 | 上海核工程研究设计院 | Medium voltage electric penetration assembly with thermocouple temperature measuring assembly |
| CN106128523A (en) * | 2016-08-10 | 2016-11-16 | 长江勘测规划设计研究有限责任公司 | A kind of underground nuclear power station fluid-tight electrical penetration system |
| CN108599023A (en) * | 2018-04-20 | 2018-09-28 | 国核工程有限公司 | Nuclear power station radiation areas cable tie method |
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| CN110853776B (en) | 2021-12-17 |
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