CN108039211B - Pressurized water reactor integrated reactor top and shielding plate in reactor top - Google Patents

Pressurized water reactor integrated reactor top and shielding plate in reactor top Download PDF

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Publication number
CN108039211B
CN108039211B CN201711297405.6A CN201711297405A CN108039211B CN 108039211 B CN108039211 B CN 108039211B CN 201711297405 A CN201711297405 A CN 201711297405A CN 108039211 B CN108039211 B CN 108039211B
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China
Prior art keywords
shielding plate
plate
support plate
seismic support
pressurized water
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Active
Application number
CN201711297405.6A
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Chinese (zh)
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CN108039211A (en
Inventor
李�浩
何培峰
李燕
叶献辉
陈西南
余志伟
罗英
胡朝威
张翼
赵伟
王庆田
舒翔
郑斌
王尚武
胡雪飞
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Nuclear Power Institute of China
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Nuclear Power Institute of China
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Priority to CN201711297405.6A priority Critical patent/CN108039211B/en
Publication of CN108039211A publication Critical patent/CN108039211A/en
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    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21CNUCLEAR REACTORS
    • G21C13/00Pressure vessels; Containment vessels; Containment in general
    • G21C13/02Details
    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21CNUCLEAR REACTORS
    • G21C13/00Pressure vessels; Containment vessels; Containment in general
    • G21C13/02Details
    • G21C13/024Supporting constructions for pressure vessels or containment vessels
    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21CNUCLEAR REACTORS
    • G21C13/00Pressure vessels; Containment vessels; Containment in general
    • G21C13/02Details
    • G21C13/028Seals, e.g. for pressure vessels or containment vessels
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Abstract

The invention discloses a pressurized water reactor integrated reactor top and a shielding plate in the reactor top, wherein the integrated reactor top comprises a surrounding barrel assembly in a barrel-shaped structure and the shielding plate, the shielding plate is arranged at the upper end of the surrounding barrel assembly and is used as a cover plate at the upper end of the surrounding barrel assembly, and a plurality of through holes penetrating through the upper end and the lower end of the shielding plate are further arranged on the shielding plate. The shielding plate comprises a plate-shaped shielding plate body, and a plurality of through holes penetrating through the upper end and the lower end of the shielding plate body are further formed in the shielding plate body. The integrated reactor top and shielding plate has the characteristics of simple structure, convenience in manufacturing and capability of saving the space in the containment.

Description

Pressurized water reactor integrated reactor top and shielding plate in reactor top
Technical Field
The invention relates to the technical field of pressurized water reactors, in particular to a pressurized water reactor integrated top and a shielding plate in the top.
Background
A rod ejection event refers to an event in which the control rod assembly and drive mechanism are ejected as a result of a mechanical failure of the seal housing of the control rod drive mechanism. The function of the missile-resistant shielding plate is to prevent the missiles such as the driving rod stroke sleeve, the rod position detector assembly, the anti-seismic plate, the driving rod assembly and the like from flying out in the bullet rod accident, and avoid the missiles from damaging other equipment in the containment and the containment.
At present, the common structural form of pressurized water reactor anti-missile shielding at home and abroad is a rectangular steel frame structural platform, and the steel frame structural platform is placed on a reactor pit and is positioned right above a reactor. The steel frame platform is large in size and weight, and time and labor are wasted in hoisting and moving. During each reactor refueling overhaul period, the platform needs to be removed, and the overhaul progress is influenced. Meanwhile, the position of the missile-resistant platform needs to be reserved in the containment with a narrow space, so that the space in the containment is tense.
Disclosure of Invention
Aiming at the problems of large volume, heavy weight, time and labor waste in hoisting and moving and large influence on the space in a containment vessel of the conventional pressurized water reactor missile-resistant shielding structure, the invention provides an integrated pressurized water reactor roof and a shielding plate in the integral pressurized water reactor roof.
In order to solve the problems, the pressurized water reactor integrated top and the shielding plate in the top are provided with the following technical points: the pressurized water reactor integrated reactor top comprises a surrounding barrel assembly in a cylindrical structure and further comprises a shielding plate, the shielding plate is installed at the upper end of the surrounding barrel assembly and serves as a cover plate at the upper end of the surrounding barrel assembly, and a plurality of through holes penetrating through the upper end and the lower end of the shielding plate are formed in the shielding plate.
Specifically, the lower end of the upper skirt assembly is used for being connected with the pressure vessel top cover, if the skirt assembly is placed or fixed on a supporting table of the pressure vessel top cover, the control rod driving mechanism is located on a tube seat of the pressure vessel top cover, and the control rod driving mechanism is enclosed in the skirt assembly. The through holes are used for accommodating the upper ends of the control rod driving mechanisms and are used for ensuring that the stroke sleeves, the rod position detectors and the coil power plugs of the control rod driving mechanisms can penetrate through the shielding plates, namely the actual number of the through holes is determined according to the number of the control rod driving mechanisms, and the relative positions of the through holes are consistent with the relative positions of the corresponding control rod driving mechanisms.
Since the prior art is provided with the anti-vibration plate for controlling the position of the control rod drive mechanism in the radial direction of the shroud assembly, the anti-vibration plate corresponds to a fin protruding outward relative to the side surface of the control rod drive mechanism. In the scheme, the shielding plate is fixed on the surrounding cylinder assembly, and the shielding plate is provided with the through hole for the upper end of the control rod driving mechanism to penetrate through the shielding plate, so that, when the mechanical failure of the sealing shell causes the ejection accident of the control rod assembly and the driving mechanism, during the upward movement of the control rod driving mechanism, the anti-seismic plate fixed on the control rod driving mechanism moves upwards along with the control rod driving mechanism, and because the anti-seismic plate has smaller thickness and smaller rigidity, when the bottom of the anti-seismic plate and the bottom of the shielding plate act, the anti-seismic plate can reduce the interaction force between the anti-seismic plate and the bottom of the shielding plate through elastic deformation or plastic deformation, so that the shielding plate not only can play the role of preventing flying objects from flying out, simultaneously, through the deformation of the anti-seismic plate, the effect of buffering the stress of the control rod driving mechanism can be achieved: in the conventional technology, the upper end of the control rod driving mechanism is in direct collision contact with the anti-popping shielding structure, the area of the upper end of the control rod driving mechanism is small, the impact force is actually very large, the control rod driving mechanism can be further broken and damaged, the anti-seismic plate on the control rod driving mechanism in the scheme can play two layers of functions compared with the prior art, one of the anti-seismic plate and the anti-seismic plate is used for fixing the position of the control rod driving mechanism on the radial direction of the surrounding cylinder assembly, the other anti-seismic plate is used as a component acting on the control rod driving mechanism and the shielding plate, and when the anti-seismic plate and the shielding plate interact, the anti-seismic plate can play an ideal buffering role. Meanwhile, a shielding structure arranged above the top cover of the pressure vessel in the prior art is omitted, and the integrated design of the parts above the pressure vessel is realized, so that the aims of simplifying the structural arrangement of the reactor top structure, facilitating the manufacture of the reactor top structure and saving the space in the containment vessel can be achieved.
The pressurized water reactor integrated reactor top further comprises an anti-seismic support plate which is in a flange disc shape, the top of the surrounding cylinder assembly is also provided with a convex annular flange, and the anti-seismic support plate is connected with the annular flange through a second connecting bolt;
the shielding plate is circular, the outer diameter of the shielding plate is larger than the diameter of an inner hole of the anti-seismic support plate, the shielding plate further comprises a first connecting bolt, the shielding plate is connected with the anti-seismic support plate through the first connecting bolt, and the shielding plate serves as a cover plate of the inner hole of the anti-seismic support plate.
The scheme provides a specific integrated reactor roof structure, in the structure, the upper end of the surrounding cylinder assembly is equivalently provided with an annular flange which is also in a flange disc shape, the anti-seismic support plate is stacked on the annular flange, and after the anti-seismic support plate is connected with the annular flange through bolts, the shielding plate is fixed in the middle of the anti-seismic support plate through the bolts. In the structure, the anti-seismic bearing plate is used for bearing the impact of earthquake load, and meanwhile, the anti-seismic bearing plate is used as an intermediate connecting piece between the shielding plate and the surrounding cylinder assembly. Since, in order for the shield plate and the anti-seismic support plate to perform their respective functions, both of them are required to have a sufficient thickness, if desired, the anti-seismic support plate may have a thickness of between 80 and 120mm, for example 100mm, the shield plate may have a thickness of between 20 and 40mm, for example 30mm, therefore, the shielding plate and the anti-seismic support plate have larger weight, the mode of independently arranging the shielding plate and the anti-seismic support plate is convenient for hoisting the shielding plate and the anti-seismic support plate individually, and simultaneously, when the control rod driving mechanism is installed, the installation of the reactor top part on the top cover of the pressure vessel can be completed by installing the skirt barrel assembly firstly, then installing the control rod driving mechanism, then installing the anti-seismic support plate and then installing the shielding plate, the single hung component of the installation route is light in weight, and the operator can conveniently complete the relative position positioning between the components during operation.
In the scheme, the positions of the through holes need to correspond to the control rod driving mechanisms, so the positions of the through holes in the space are very important, and in order to determine the positions of the through holes in the space, the anti-seismic support device further comprises a first positioning pin and a second positioning pin, wherein the number of the first positioning pin and the number of the second positioning pin are at least two, the first positioning pin is used for positioning the shielding plate on the anti-seismic support plate, and the second positioning pin is used for positioning the anti-seismic support plate on the annular flange. In the scheme of the positioning pin, the positioning of the upper side component on the lower side component can be completed in a mode that the corresponding pin is in interference fit with the blind hole and in clearance fit with the through hole by arranging the blind hole in the lower component and arranging the through hole in the upper component in the two overlapped components and simultaneously the positioning pins for positioning the two components are at least two.
The anti-seismic control rod driving mechanism is characterized by further comprising a cable bridge fixed on the anti-seismic support plate, and one end of the cable bridge, connected with the anti-seismic support plate, is located on the outer side of the shielding plate.
In order to facilitate hoisting of the whole integrated pile top or some part or parts of the integrated pile top, the integrated pile top further comprises a top cover lifting appliance which is connected to any one of the following three parts: the enclosure assembly, the anti-seismic support plate and the shielding plate.
In order to facilitate air cooling of the control rod driving mechanism, a ventilation structure is further arranged on the surrounding cylinder assembly and used for sending cooling air for cooling the control rod driving mechanism into the surrounding cylinder assembly.
As an implementation scheme that the area of the opening is small, the strength of the shielding plate is facilitated, and the shielding performance of the shielding plate is guaranteed, the through holes are waist-shaped holes, and the length direction of each waist-shaped hole is consistent with the arrangement direction of the stroke sleeve, the rod position detector and the coil power plug in the control rod driving mechanism.
The shielding plate is made of carbon structural steel or stainless steel.
Meanwhile, the invention also discloses a shielding plate in the pile top, which comprises a plate-shaped shielding plate body, wherein the shielding plate body is also provided with a plurality of through holes which penetrate through the upper end and the lower end of the shielding plate body.
The shielding plate is used for being connected with the surrounding barrel assembly, so that the integral design of the reactor top structure can be realized, the processing and the manufacturing of the reactor top structure are convenient, the existing heavy shielding structure can be replaced, and the space in the containment vessel can be saved.
As an implementation scheme that the area of the opening is small, the strength of the shielding plate is facilitated, and the shielding performance of the shielding plate is guaranteed, the through holes are waist-shaped holes, and the length direction of each waist-shaped hole is consistent with the arrangement direction of the stroke sleeve, the rod position detector and the coil power plug in the control rod driving mechanism.
The invention has the following beneficial effects:
in the pile top and the shield plate scheme that provide above, adopt and be fixed in the structural setting on the surrounding barrel subassembly with the shield plate, when sealed shell mechanical failure leads to control stick subassembly and actuating mechanism to pop out the accident, above shield plate not only can play the purpose that prevents the thing that flies out, simultaneously, installed the shielding structure in pressure vessel top cap top among the prior art, the integrated design of parts above the pressure vessel has been realized, like this, can reach the structural setting of simplifying the pile top structure, be convenient for the manufacturing of pile top structure, the purpose of saving the interior space of containment.
Drawings
FIG. 1 is an assembly view of an embodiment of a pressurized water reactor integrated top according to the present invention on a top cover of a pressure vessel;
FIG. 2 is an assembly view showing the structure and connection relationship of a control rod driving mechanism, a shielding plate, an anti-seismic support plate and a shroud assembly in an embodiment of the pressurized water reactor integrated reactor head of the present invention;
fig. 3 is a schematic structural diagram of a shielding plate in an embodiment of the pressurized water reactor integrated top of the invention.
The labels in the figure are respectively: 1. pressure vessel top cap, 2, surrounding barrel assembly, 3, ventilation structure, 4, control rod drive mechanism, 5, antidetonation bearing plate, 6, shield plate, 7, cable testing bridge, 8, top cap hoist, 9, first connecting bolt, 10, first locating pin, 11, second locating pin, 12, second connecting bolt, 13, through-hole.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1 to 3, the pressurized water reactor integrated reactor top comprises a surrounding barrel assembly 2 in a cylindrical structure and further comprises a shielding plate 6, the shielding plate 6 is installed at the upper end of the surrounding barrel assembly 2, the shielding plate 6 serves as a cover plate at the upper end of the surrounding barrel assembly 2, and a plurality of through holes 13 penetrating through the upper end and the lower end of the shielding plate 6 are further formed in the shielding plate 6.
Specifically, the lower end of the upper skirt module 2 is used for being connected with the pressure vessel top cover 1, if the skirt module 2 is placed or fixed on a support table of the pressure vessel top cover 1, the control rod drive mechanism 4 is located on a tube seat of the pressure vessel top cover 1, and the control rod drive mechanism 4 is enclosed in the skirt module 2. The through holes 13 are used for accommodating the upper ends of the control rod drive mechanisms 4, the through holes 13 are used for ensuring that the stroke sleeves, the rod position detectors and the coil power plugs of the control rod drive mechanisms 4 can penetrate through the shielding plates 6, namely the actual number of the through holes 13 is determined according to the number of the control rod drive mechanisms 4, and the relative positions of the through holes 13 are consistent with the relative positions of the corresponding control rod drive mechanisms 4.
In the above scheme, the shielding plate 6 is fixed on the surrounding cylinder assembly 2, when the sealing shell mechanical failure causes the control rod assembly and the driving mechanism to eject accidents, the shielding plate 6 can not only play the role of preventing the flying objects from flying out, but also cancel the shielding structure arranged above the top cover 1 of the pressure vessel in the prior art, and realize the integrated design of the components above the pressure vessel, so that the aims of simplifying the structural arrangement of the pile top structure, facilitating the manufacture of the pile top structure and saving the space in the containment vessel can be achieved.
Meanwhile, the invention also discloses a shielding plate 6 in the pile top, which comprises a plate-shaped shielding plate 6 body, wherein the shielding plate 6 body is also provided with a plurality of through holes 13 which penetrate through the upper end and the lower end of the shielding plate 6 body.
The shielding plate 6 is used for being connected with the surrounding barrel assembly 2, so that the integral design of a reactor roof structure can be realized, the processing and the manufacturing of the reactor roof structure are convenient, the existing heavy shielding structure can be replaced, and the space in a containment vessel can be saved.
Example 2:
the embodiment is further limited on the basis of embodiment 1, as shown in fig. 1 to 3, as a further technical solution of the pressurized water reactor integrated reactor top, the pressurized water reactor integrated reactor top further includes an anti-seismic support plate 5, the anti-seismic support plate 5 is in a flange disc shape, the top of the skirt assembly 2 is further provided with a convex annular flange, and the pressurized water reactor integrated reactor top further includes a second connecting bolt 12, and the anti-seismic support plate 5 is connected with the annular flange through the second connecting bolt 12;
the shielding plate 6 is circular, the outer diameter of the shielding plate 6 is larger than the diameter of an inner hole of the anti-seismic supporting plate 5, the shielding plate further comprises a first connecting bolt 9, the shielding plate 6 is in bolted connection with the anti-seismic supporting plate 5 through the first connecting bolt 9, and the shielding plate 6 serves as a cover plate of the inner hole of the anti-seismic supporting plate 5.
The scheme provides a specific integrated reactor roof structure, in the structure, the upper end of the surrounding cylinder assembly 2 is equivalent to be provided with an annular flange which is also in a flange disc shape, the anti-seismic support plate 5 is stacked on the annular flange, and after the anti-seismic support plate 5 is connected with the annular flange through bolts, the shielding plate 6 is fixed in the middle of the anti-seismic support plate 5 through the bolts. In this structure, the above anti-seismic support plate 5 is used to bear the impact of the earthquake load, and at the same time, the anti-seismic support plate 5 serves as an intermediate connecting member between the shielding plate 6 and the skirt module 2. Since both the shielding plate 6 and the anti-seismic support plate 5 are required to have a sufficient thickness in order to enable the respective functions, in the present embodiment, the anti-seismic support plate 5 is made of carbon structural steel with the thickness of 100mm, the shielding plate 6 is made of carbon structural steel with the thickness of 30mm, thus, the shielding plate 6 and the anti-seismic support plate 5 have larger weight, and the mode of independently arranging the shielding plate 6 and the anti-seismic support plate 5 is adopted, thereby not only being convenient for hoisting the shielding plate 6 and the anti-seismic support plate 5 singly, but also simultaneously, when the control rod driving mechanism 4 is installed, the installation of the reactor top part on the pressure vessel top cover 1 can be completed by installing the skirt barrel assembly 2, then installing the control rod driving mechanism 4, then installing the anti-seismic support plate 5 and then installing the shielding plate 6, the single hung component of the installation route is light in weight, and the operator can conveniently complete the relative position positioning between the components during operation.
In the scheme, the positions of the through holes 13 need to correspond to the control rod drive mechanisms 4, so that the positions of the through holes 13 in the space are very important, in order to determine the positions of the through holes 13 in the space, the control rod drive mechanism further comprises a first positioning pin 10 and a second positioning pin 11, at least two first positioning pins 10 and at least two second positioning pins 11 are arranged, the first positioning pin 10 is used for positioning the shielding plate 6 on the anti-seismic support plate 5, and the second positioning pin 11 is used for positioning the anti-seismic support plate 5 on the annular flange. In the scheme of the positioning pin, the positioning of the upper side component on the lower side component can be completed in a mode that the corresponding pin is in interference fit with the blind hole and in clearance fit with the through hole by arranging the blind hole in the lower component and arranging the through hole in the upper component in the two overlapped components and simultaneously the positioning pins for positioning the two components are at least two.
In order to facilitate the centralized laying of cables and the connection of the cables and each control rod driving mechanism 4, the control rod driving mechanism further comprises a cable bridge 7 fixed on the anti-seismic support plate 5, and one end of the cable bridge 7, which is connected with the anti-seismic support plate 5, is positioned outside the shielding plate 6.
In order to facilitate hoisting of the whole integrated pile top or some part or parts of the integrated pile top, the integrated pile top further comprises a top cover lifting appliance 8, wherein the top cover lifting appliance 8 is connected to any one of the following three parts: the enclosure assembly 2, the anti-seismic support plate 5 and the shielding plate 6.
In order to facilitate air cooling of the control rod drive mechanisms 4, the shroud assembly 2 is further provided with a ventilation structure 3, and the ventilation structure 3 is used for sending cooling air for cooling the control rod drive mechanisms 4 into the shroud assembly 2.
As an implementation scheme that the area of the opening is small, the strength of the shielding plate 6 is facilitated, the shielding performance of the shielding plate 6 is guaranteed, the through holes 13 are all waist-shaped holes, and the length direction of each waist-shaped hole is consistent with the arrangement direction of a travel sleeve, a rod position detector and a coil power plug in the control rod driving mechanism 4.
The shielding plate 6 is made of carbon structural steel or stainless steel.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. For those skilled in the art to which the invention pertains, other embodiments that do not depart from the gist of the invention are intended to be within the scope of the invention.

Claims (7)

1. The pressurized water reactor integrated top comprises a surrounding barrel assembly (2) in a barrel-shaped structure and is characterized by further comprising a shielding plate (6), wherein the shielding plate (6) is installed at the upper end of the surrounding barrel assembly (2), the shielding plate (6) serves as a cover plate at the upper end of the surrounding barrel assembly (2), and a plurality of through holes (13) penetrating through the upper end and the lower end of the shielding plate (6) are further formed in the shielding plate (6);
the through hole is used for accommodating the upper end of the control rod driving mechanism and is used for ensuring that a stroke sleeve, a rod position detector and a coil power plug of the control rod driving mechanism can penetrate through the shielding plate;
the anti-seismic support plate assembly comprises an anti-seismic support plate (5), a flange plate and a second connecting bolt (12), wherein the anti-seismic support plate (5) is in a flange shape, a convex annular flange is further arranged at the top of the enclosure assembly (2), and the anti-seismic support plate (5) is in bolted connection with the annular flange through the second connecting bolt (12);
the anti-seismic support plate is characterized in that the shielding plate (6) is circular, the outer diameter of the shielding plate (6) is larger than the diameter of an inner hole of the anti-seismic support plate (5), the anti-seismic support plate further comprises a first connecting bolt (9), the shielding plate (6) is connected with the anti-seismic support plate (5) through the first connecting bolt (9) in a bolt mode, and the shielding plate (6) serves as a cover plate of the inner hole of the anti-seismic support plate.
2. The pressurized water reactor integrated roof according to claim 1, further comprising a first positioning pin (10) and a second positioning pin (11), wherein at least two positioning pins are arranged on each of the first positioning pin (10) and the second positioning pin (11), the first positioning pin (10) is used for positioning the shielding plate (6) on the anti-seismic support plate (5), and the second positioning pin (11) is used for positioning the anti-seismic support plate (5) on the annular flange.
3. The pressurized water reactor integrated reactor roof according to claim 1, further comprising a cable bridge (7) fixed on the anti-seismic support plate (5), wherein one end of the cable bridge (7) connected with the anti-seismic support plate (5) is positioned outside the shielding plate (6).
4. The pressurized water reactor integrated top according to claim 1, further comprising a top cover hanger (8), wherein the top cover hanger (8) is connected to any one of the following three parts: the enclosure comprises an enclosure assembly (2), an anti-seismic support plate (5) and a shielding plate (6).
5. The pressurized water reactor integrated top according to claim 1, characterized in that a ventilation structure (3) is further arranged on the surrounding cylinder assembly (2), and the ventilation structure (3) is used for feeding cooling air for cooling the control rod driving mechanism (4) into the interior of the surrounding cylinder assembly (2).
6. The pressurized water reactor integrated top according to claim 1, wherein the through holes (13) are all kidney-shaped holes, and the length direction of the kidney-shaped holes is consistent with the arrangement direction of a travel sleeve, a rod position detector and a coil power plug in the control rod driving mechanism (4).
7. The pressurized water reactor integrated top according to any one of claims 1 to 6, characterized in that the shielding plate (6) is made of carbon structural steel or stainless steel.
CN201711297405.6A 2017-12-08 2017-12-08 Pressurized water reactor integrated reactor top and shielding plate in reactor top Active CN108039211B (en)

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CN109872827A (en) * 2019-03-11 2019-06-11 中国核动力研究设计院 A kind of barrel-type integration heap roof construction suitable for high temperature resistant driving mechanism

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