CN112201374A - Eccentric reactor reloading device - Google Patents

Eccentric reactor reloading device Download PDF

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Publication number
CN112201374A
CN112201374A CN202011079947.8A CN202011079947A CN112201374A CN 112201374 A CN112201374 A CN 112201374A CN 202011079947 A CN202011079947 A CN 202011079947A CN 112201374 A CN112201374 A CN 112201374A
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channel
plug body
reactor
axis
eccentric
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CN112201374B (en
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李仁厚
李蕤
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China First Heavy Industries Co Ltd
CFHI Dalian Engineering and Technology Co Ltd
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China First Heavy Industries Co Ltd
CFHI Dalian Engineering and Technology Co Ltd
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/02—Details of handling arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

The invention discloses an eccentric reactor refueling device, relates to the technical field of reactor refueling devices, and particularly relates to an eccentric reactor refueling device for online reactor refueling. The main body of the invention is a plug body which is arranged at the upper part of a reactor container through a bearing; the method is characterized in that: n channel groups with the same layout are uniformly distributed on the plug body in the central area along the circumferential direction; the channel group comprises a plurality of independent channels; the arrangement axis of the channel group is eccentric to the axis of the plug body; the central area of the plug body is provided with a positioning channel, and the axis of the positioning channel is coincident with the arrangement axis of the channel group. The N channel groups are uniformly arranged along the circumferential direction of the plug body, and in order to ensure that the position of each channel after the plug body rotates corresponds to the position of the corresponding reactor core assembly, the rotating angle of the plug body is an integral multiple of 360 degrees/N. The technical scheme of the invention solves the problems that the refueling device in the prior art is difficult to manufacture and assemble, has large workload of field installation, is easy to cause reactor operation failure and the like.

Description

Eccentric reactor reloading device
Technical Field
The invention discloses an eccentric reactor refueling device, relates to the technical field of reactor refueling devices, and particularly relates to an eccentric reactor refueling device for online reactor refueling.
Background
The reactor refueling device is used for monitoring the operation and in-reactor state of in-reactor parts, the central area of the reactor refueling device is uniformly distributed along the circumferential direction to form a channel group, the channel group comprises a plurality of independent channels, and the positions of the channels correspond to the positions of corresponding reactor core assemblies in the reactor.
The arrangement axis of the channel is coaxial with the axis of the on-line refueling reactor refueling device, which causes the following 3 problems:
firstly, the refueling device of the online refueling reactor consists of two or more plug bodies, each plug body consists of thousands of parts and is influenced by gravity center eccentricity and assembly deviation, and the position of a channel on the refueling device after assembly deviates from the position of a corresponding reactor core assembly, so that the difficulty of equipment manufacture and assembly is increased for reducing the deviation;
secondly, if the position offset of the lower end of the channel on the material changing device is too large during installation, the material changing device does not have the channel position adjusting capability, the position of the assembly needs to be integrally adjusted, and the installation workload of the field equipment is increased;
thirdly, the deformation after the in-reactor heating is difficult to accurately predict, and after the reactor is operated, if the position of the channel on the refueling device is too large to deviate from the position of the corresponding reactor core assembly, the channel on the refueling device cannot be butted with the corresponding reactor core assembly, and the refueling device does not have the channel position adjusting capability, so that the operation fault of the reactor is caused.
In the process of operating the reactor core assembly, the channels play a role in guiding and positioning, and because the plug body channels are fully arranged, the distance between the adjacent channels is short, and the purpose of increasing the maximum allowable offset of the channels cannot be realized by increasing the diameter of the channels.
Aiming at the problems in the prior art, a novel eccentric reactor refueling device is researched and designed, so that the problem in the prior art is very necessary to be overcome.
Disclosure of Invention
According to the technical problems that the refueling device provided by the prior art is high in manufacturing and assembling difficulty, large in field installation workload, easy to cause reactor operation faults and the like, the eccentric reactor refueling device is provided. The invention mainly adopts the technical scheme that N channel groups with the same layout are uniformly distributed in the central area of the plug body along the circumferential direction, each channel group comprises a plurality of independent channels, and the arrangement axis of each channel group and the axis of the plug body are eccentrically arranged. The position of the arrangement axis of the channel group can be adjusted by rotating the plug body, so that the position offset of the channel has compensation capacity, the risk that the online refueling reactor cannot be operated due to overlarge channel position offset is reduced, and the requirements on equipment manufacturing and assembling precision are reduced.
The technical means adopted by the invention are as follows:
the main body of the eccentric reactor refueling device is a plug body which is arranged at the upper part of a reactor container through a bearing; the method is characterized in that:
furthermore, N channel groups with the same layout are uniformly distributed on the plug body in the central area along the circumferential direction;
furthermore, the channel group comprises a plurality of independent channels;
further, the arrangement axis of the channel group is eccentrically arranged with the axis of the plug body;
further, a positioning channel is arranged in the central area of the plug body, and the axis of the positioning channel is coincident with the arrangement axis of the channel group.
Furthermore, the N channel groups are uniformly arranged along the circumferential direction of the plug body, and in order to ensure that the position of each channel after the plug body rotates corresponds to the position of the corresponding reactor core assembly, the rotating angle of the plug body is an integral multiple of 360 degrees/N.
Further, the arrangement axes of the channel groups are set within an allowable range, and the maximum allowable offset amount of the positions of the channels and the corresponding core assemblies is emaxIn order to meet the requirement that the channel can be butted with the reactor core assembly after the plug body rotates by integral multiple of 360 degrees/N at the designed position, the offset needs to meet the requirement
Figure BDA0002718160830000021
Furthermore, the eccentric amount between the arrangement axis of the channel group and the axis of the plug body is e, and by rotating the plug body, the motion track of the lower endpoint of the arrangement axis of the channel group is a circle taking the center of the plug body as the center of a circle and the e as the radius; the minimum adjustment of the position of the passage in the opposite direction of the eccentricity is
Figure BDA0002718160830000022
Increasing the amount of offset allowed by the channel.
The arrangement axis of the channel group and the axis of the plug body are eccentrically arranged, the plug body is rotated, the projection of the motion track of the lower endpoint of the arrangement axis of the channel group on the horizontal plane is a circle taking the center of the plug body as the center of a circle and taking the eccentric amount e as the radius. By rotating the plug body, the position of each channel can be adjusted. Because the N channel groups are uniformly arranged along the circumferential direction, in order to ensure that the position of each channel corresponds to the position of the corresponding reactor core assembly after the plug body rotates, the rotating angle of the plug body is integral multiple of (360 degrees/N).
N groups of channels are uniformly distributed in the central area of the refueling device along the circumferential direction, when the offset of the channel position relative to the position of the reactor core assembly exceeds an allowable range, the position of the channel can be adjusted after the plug body rotates by an integral multiple of 360 degrees/N, and the compensation capability for the offset of the channel position is realized. Because N groups of channels are uniformly arranged on the material changing device along the circumferential direction, after the plug body rotates by an integral multiple of 360 degrees/N, the position change of each channel is equal to the position change of the channel arrangement axis, and the on-line adjustment of the channel position is realized.
Compared with the prior art, the invention has the following advantages:
1. according to the eccentric reactor refueling device, the arrangement axis of the channel group is set to be eccentric to the axis of the plug body, so that the adjustment function of the channel position after the reactor runs is realized, the compensation capability on the channel position offset is realized, and the risk that the online refueling reactor cannot be operated due to overlarge channel position offset is reduced;
2. according to the eccentric reactor refueling device provided by the invention, the arrangement axis of the channel is set to be eccentric with the axis of the plug body, so that the precision requirements of equipment manufacture and assembly are reduced.
In conclusion, the technical scheme of the invention solves the problems that the refueling device in the prior art is difficult to manufacture and assemble, the workload of field installation is large, the operation fault of the reactor is easy to cause and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the channel and core assembly of the present invention in their corresponding positions;
FIG. 2 is a schematic diagram of the corresponding positions of the channel and the core assembly according to the present invention after the offset of the lower end of the channel exceeds the allowable value;
FIG. 3 is a schematic diagram of the position of the channel and core assembly after the channel position adjustment according to the present invention after the offset of the lower end of the channel exceeds the allowable value.
In the figure: 1. the plug body 2, the channel 3 and the reactor core assembly;
A. plug body axis B, the arrangement axis of the channel.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in the figure, the invention provides an eccentric reactor refueling device, the main body of which is a plug body 1, and the plug body 1 is arranged at the upper part of a reactor container through a bearing; the method is characterized in that:
n channel groups 2 with the same layout are uniformly arranged in the central area of the plug body 1 along the circumferential direction;
the channel group 2 comprises a plurality of independent channels 21;
the arrangement axis of the channel group 2 is eccentric to the axis of the plug body 1;
the central area of the plug body 1 is provided with a positioning channel 22, and the axis of the positioning channel 22 is coincident with the arrangement axis of the channel group 2.
The N channel groups 2 are uniformly arranged along the circumferential direction of the plug body 1, and in order to ensure that the position of each channel 21 corresponds to the position of the corresponding reactor core assembly 3 after the plug body 1 rotates, the rotating angle of the plug body 1 is an integral multiple of 360 degrees/N.
The arrangement axis of the channel group 2 is set within an allowable range, and the maximum allowable offset amount of the position of the channel 21 with respect to the corresponding core assembly 3 is emaxIn order to meet the requirement that the channel 21 can be butted with the reactor core assembly 3 after the plug body 1 rotates by an integral multiple of 360 degrees/N at the designed position, the offset needs to meet the requirement
Figure BDA0002718160830000061
The eccentric amount of the arrangement axis of the channel group 2 and the axis of the plug body 1 is e, and by rotating the plug body 1, the motion track of the lower end point of the arrangement axis of the channel group 2 is a circle taking the center of the plug body 1 as the center of a circle and e as the radius; the minimum adjustment of the position of the passage 21 in the opposite direction of the eccentricity is
Figure BDA0002718160830000062
Increasing the amount of offset allowed by the channel 21.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (4)

1. The main body of the eccentric reactor refueling device is a plug body (1), and the plug body (1) is arranged at the upper part of a reactor container through a bearing; the method is characterized in that:
n channel groups (2) with the same layout are uniformly distributed in the central area of the plug body (1) along the circumferential direction;
the channel group (2) comprises a plurality of independent channels (21);
the arrangement axis of the channel group (2) is eccentrically arranged with the axis of the plug body (1);
the central area of the plug body (1) is provided with a positioning channel (22), and the axis of the positioning channel (22) is coincided with the arrangement axis of the channel group (2).
2. The eccentric reactor refueling device according to claim 1, wherein the N channel groups (2) are uniformly arranged along the circumferential direction of the plug body (1), and in order to ensure that the position of each channel (21) corresponds to the position of the corresponding core assembly (3) after the plug body (1) rotates, the rotation angle of the plug body (1) is an integral multiple of 360 degrees/N.
3. The eccentric reactor refueling device according to claim 2, wherein the arrangement axis of the channel group (2) is set within an allowable range, and the maximum allowable offset amount of the position of the channel (21) from the corresponding core assembly (3) is emaxIn order to meet the requirement that the channel (21) can be butted with the reactor core assembly (3) after the plug body (1) rotates by an integral multiple of 360 DEG/N at the designed position, the offset needs to meet the requirement
Figure FDA0002718160820000011
4. The eccentric reactor refueling device according to claim 3, wherein the eccentricity between the arrangement axis of the channel group (2) and the axis of the plug body (1) is e, and by rotating the plug body (1), the motion track of the lower end point of the arrangement axis of the channel group (2) is a circle with the center of the plug body (1) as the center and e as the radius; the minimum adjustment of the position of the channel (21) in the direction opposite to the eccentricity is
Figure FDA0002718160820000021
The amount of offset allowed by the channel (21) is increased.
CN202011079947.8A 2020-10-10 2020-10-10 Eccentric reactor reloading device Active CN112201374B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1366621A (en) * 1972-01-20 1974-09-11 Commissariat Energie Atomique Device for permitting or facilitating the handling of the elements which form a nuclear reactor core
DE4226228A1 (en) * 1991-08-07 1993-02-18 Doryokuro Kakunenryo Fuelling of nuclear esp. fast breeder reactor - allowing redn. of reactor vessel dia. as loading operation can be effected at any position within core using large and small revolving stoppers and levelling arm
JPH0540196A (en) * 1991-08-07 1993-02-19 Power Reactor & Nuclear Fuel Dev Corp Refueling method for reactor
RU2272251C1 (en) * 2004-07-12 2006-03-20 Федеральное государственное унитарное предприятие "Опытное конструкторское бюро машиностроения имени И.И. Африкантова" (ФГУП "ОКБМ") Method for refueling liquid-metal cooled reactor
CN106531257A (en) * 2016-12-29 2017-03-22 中国科学院合肥物质科学研究院 In-reactor material changing system of reactor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1366621A (en) * 1972-01-20 1974-09-11 Commissariat Energie Atomique Device for permitting or facilitating the handling of the elements which form a nuclear reactor core
US3841964A (en) * 1972-01-20 1974-10-15 Commissariat Energie Atomique Device for handling the elements of a nuclear reactor core
DE4226228A1 (en) * 1991-08-07 1993-02-18 Doryokuro Kakunenryo Fuelling of nuclear esp. fast breeder reactor - allowing redn. of reactor vessel dia. as loading operation can be effected at any position within core using large and small revolving stoppers and levelling arm
JPH0540196A (en) * 1991-08-07 1993-02-19 Power Reactor & Nuclear Fuel Dev Corp Refueling method for reactor
JPH0540197A (en) * 1991-08-07 1993-02-19 Power Reactor & Nuclear Fuel Dev Corp Refueling method for reactor
RU2272251C1 (en) * 2004-07-12 2006-03-20 Федеральное государственное унитарное предприятие "Опытное конструкторское бюро машиностроения имени И.И. Африкантова" (ФГУП "ОКБМ") Method for refueling liquid-metal cooled reactor
CN106531257A (en) * 2016-12-29 2017-03-22 中国科学院合肥物质科学研究院 In-reactor material changing system of reactor

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