CN213815565U

CN213815565U - Reactor core

Info

Publication number: CN213815565U
Application number: CN202022540581.1U
Authority: CN
Inventors: 邱清; 徐刚; 田力
Original assignee: Qidi New Nuclear Beijing Energy Technology Co ltd
Current assignee: Qidi New Nuclear Beijing Energy Technology Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-07-27
Anticipated expiration: 2030-11-05

Abstract

The utility model discloses a reactor core relates to nuclear reactor technical field to thereby lead to the inhomogeneous technical problem of reactor fuel release heat that leads to water flow distribution because the part loads fuel assembly in solving current reactor core pond. The reactor core of the utility model comprises: the solid fuel is provided with a virtual fuel at the periphery; the reactor core size made up of the solid fuel and the dummy fuel matches the size of the core substructure. Because the size of the reactor core formed by the solid fuel and the virtual fuel is matched with the size of the reactor core lower structure, the reactor core lower structure does not have idle places (both covered by the solid fuel and the virtual fuel), so that the water flow in the reactor core water pool is uniformly distributed, the heat released by the reactor fuel is uniform, and the flattening of the power of the reactor core can be facilitated.

Description

Reactor core

Technical Field

The utility model relates to a nuclear reactor technical field, in particular to reactor core.

Background

A nuclear energy in distributed heat supply (urban central heating mode) which takes energy generated by nuclear fission as a heat source. It is a new way to solve the urban energy supply, reduce the transportation pressure and eliminate the environmental pollution caused by coal burning.

Among them, nuclear reactors, also called nuclear reactors or reactors, are devices that can maintain a controlled self-sustaining chain type nuclear fission reaction to realize nuclear energy utilization. The nuclear reactor can generate a self-sustaining chain type nuclear fission process in the nuclear reactor without adding a neutron source by reasonably arranging nuclear fuel. Strictly speaking, the term reactor shall cover fission reactors, fusion reactors, fission fusion hybrid reactors, but in general only fission reactors.

In particular, the reactor core, i.e. the fuel rods, will melt at high temperatures, i.e. the core melts. Nuclear reactor core design is one of the key design contents of a nuclear power plant, and fuel assemblies are important components of the nuclear reactor core. The main task of nuclear reactor core design is to provide a nuclear reactor core that meets the physical, thermal, hydraulic and safety design requirements of a pressurized water reactor nuclear power plant, including determining the type and number of fuel assemblies, the arrangement of the fuel assemblies in the nuclear reactor, and the like.

However, the applicant of the present application finds that the existing reactor cores are all solid fuel, the size of the reactor core is not changed, the size of the core substructure where the reactor core is placed is also not changed, and different numbers of fuel assemblies need to be placed under different working conditions, so that the situation that the whole core substructure cannot be filled with the fuel assemblies sometimes occurs, and when the core substructure has a vacant place, the water flow in the core water tank is not uniformly distributed, thereby affecting the reactor fuel and causing the heat released by the reactor fuel to be non-uniform.

Therefore, it is a technical problem to be solved by those skilled in the art how to provide a reactor core substructure and a reactor core that can ensure uniform water flow distribution in a core pool under different operating conditions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a reactor core to thereby solve the uneven technical problem who leads to reactor fuel release heat inhomogeneous that leads to of the water flow distribution that leads to because of the part loads fuel assembly in the current reactor core pond.

The utility model provides a reactor core, include: the solid fuel is provided with a virtual fuel at the periphery; the reactor core constructed of the solid fuel and the dummy fuel has a substructure size that matches a size of a core substructure.

In practical applications, the reactor core of the present invention is characterized in that the flow resistance of the virtual fuel is consistent with that of the solid fuel.

Wherein, in the reactor core of the utility model, the virtual fuel adopts a resistance plug.

Optionally, the reactor core of the present invention wherein the virtual fuel is isotope-producing fuel.

Specifically, the reactor core of the present invention further comprises: a grid having a size matching a size of the core substructure; the solid fuel and the virtual fuel are both placed in the framework and fixedly connected through the framework.

Further, in the reactor core of the present invention, a reflective layer is disposed on the periphery of the virtual fuel.

Compared with the prior art, the reactor core of the utility model has the following advantages:

the utility model provides a reactor core includes: the solid fuel is provided with a virtual fuel at the periphery; the size of the reactor core made of the solid fuel and the virtual fuel matches the size of the core substructure. Therefore, the utility model provides an among the reactor core, because the size of the reactor core that entity fuel and virtual fuel constitute matches with the size of reactor core substructure, consequently there is not idle place (all covered by entity fuel and virtual fuel) in the reactor core substructure to water flow distribution in the reactor core pond is even, and then the heat of reactor fuel release is even, can be favorable to the flat core power of exhibition.

The utility model also provides a reactor core, include: the size of the grid is matched with that of the core lower structure; solid fuel and virtual fuel are alternately placed in the grid, and the solid fuel and the virtual fuel are fixedly connected through the grid.

Wherein, in the reactor core, the entity fuel with the virtual fuel is arranged in the inlayer in turn, and from interior to exterior virtual fuel's the ratio of occupying reduces in proper order.

Optionally, the solid fuel and the virtual fuel are arranged in zones, the solid fuel being arranged in an inner layer and the virtual fuel being arranged in an outer layer.

Or, in another alternative embodiment, the solid fuel and the virtual fuel are arranged in annular zones, the annular zones are respectively an outer zone, a middle zone and a central zone from outside to inside, the virtual fuel is arranged in the central zone and the outer zone, and the solid fuel is arranged in the middle zone.

Specifically, the reactor core of the present invention is provided with a reflective layer on the periphery of the outermost solid fuel or the outermost virtual fuel.

the utility model provides an among the reactor core, include: the size of the grid is matched with that of the lower structure of the reactor core; wherein, the grid is alternately provided with solid fuel and virtual fuel, and the solid fuel and the virtual fuel are fixedly connected through the grid. From this analysis can know, the utility model provides an among the substructure of reactor core, because entity fuel and virtual fuel have been placed in turn in the framework, and the size of framework matches with the size of reactor core substructure, consequently there is not idle place (all covered by entity fuel and virtual fuel) in the reactor core substructure to water flow distribution in the reactor core pond is even, and then the heat of reactor fuel release is even, can be favorable to the flat exhibition reactor core power.

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 embodiments or the technical solutions in the prior art will be briefly described 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 top view of a first reactor core according to an embodiment of the present invention;

fig. 2 is a schematic top view of a second reactor core according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a top view of a third reactor core according to an embodiment of the present invention;

fig. 4 is a schematic top view of a fourth reactor core according to an embodiment of the present invention.

In the figure: 1-a solid fuel; 2-virtual fuel; 3-core substructure.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 is a schematic top view of a first reactor core according to an embodiment of the present invention; fig. 2 is a schematic top view of a second reactor core according to an embodiment of the present invention; fig. 3 is a schematic top view of a third reactor core according to an embodiment of the present invention.

As shown in fig. 1-3, embodiments of the present invention provide a reactor core, comprising: the fuel comprises a solid fuel 1, wherein a virtual fuel 2 is arranged on the periphery of the solid fuel 1; the size of the reactor core made up of the solid fuel 1 and the virtual fuel 2 matches the size of the core substructure 3.

Compared with the prior art, the reactor core provided by the embodiment of the utility model has the following advantages:

the embodiment of the present invention provides a reactor core, as shown in fig. 1-3, including: the fuel system comprises a solid fuel 1, wherein a virtual fuel 2 is arranged on the periphery of the solid fuel 1; the size of the reactor core made up of the solid fuel 1 and the dummy fuel 2 matches the size of the core substructure 3. From this analysis can know, the embodiment of the utility model provides an among the reactor core, because the size of the reactor core that solid fuel 1 and virtual fuel 2 constitute matches with core substructure 3's size, consequently there is not idle place (all covered by solid fuel 1 and virtual fuel 2) in core substructure 3 to water flow distribution in the reactor core pond is even, and then the heat of reactor fuel release is even, can be favorable to flattening the reactor core power.

During practical application, the embodiment of the utility model provides an among the reactor core, above-mentioned virtual fuel 2 is unanimous with entity fuel 1's flow resistance to can guarantee well that the water flow in the reactor core pond distributes evenly, and then the heat of reactor fuel release is even, can be favorable to flattening reactor core power.

Wherein, in the reactor core provided by the embodiment of the utility model, the above-mentioned virtual fuel 2 can adopt the resistance stopper.

Alternatively, the embodiment of the present invention provides a reactor core, wherein the virtual fuel 2 may be a fuel for producing isotopes.

Specifically, the reactor core provided by the embodiment of the present invention may further include: and a lattice having a size matched to the size of the core substructure 3 such that the solid fuel 1 and the virtual fuel 2 can be both placed in the lattice and fixedly connected through the lattice.

Further, in the reactor core provided by the embodiment of the present invention, the periphery of the virtual fuel 2 may be provided with a reflective layer.

As shown in fig. 4, embodiments of the present invention also provide a reactor core, including: a lattice, the size of which matches the size of the core substructure 3; and, the solid fuel 1 and the virtual fuel 2 are alternately placed in the grid, and the solid fuel 1 and the virtual fuel 2 can be fixedly connected through the grid.

as shown in fig. 4, embodiments of the present invention provide a reactor core including: a lattice, the size of which matches the size of the core substructure 3; wherein, the grid is alternately provided with the solid fuel 1 and the virtual fuel 2, and the solid fuel 1 and the virtual fuel 2 are fixedly connected through the grid. From this analysis can know, the embodiment of the utility model provides an among the reactor core, because entity fuel 1 and virtual fuel 2 have been placed in turn in the framework, and the size of framework matches with the size of reactor core substructure 3, consequently there is not idle place (all covered by entity fuel 1 and virtual fuel 2) in reactor core substructure 3 to the water flow distribution in the reactor core pond is even, and then the heat of reactor fuel release is even, can be favorable to flattening the reactor core power.

In a specific embodiment, the embodiment of the present invention provides a reactor core, wherein the solid fuel 1 and the virtual fuel 2 are arranged in a partitioned manner, specifically divided into an inner layer and an outer layer, the solid fuel 1 is not known in the inner layer, and the virtual fuel is arranged in the outer layer.

Alternatively, in another embodiment, the reactor core is arranged in annular zones, the annular zones are respectively an outer zone, a middle zone and a central zone from outside to inside, the outer zone and the central zone are provided with the solid fuel 1, and the middle zone is provided with the virtual fuel 2.

Specifically, the embodiment of the present invention provides a reactor core, wherein the periphery of the outermost solid fuel 1 or virtual fuel 2 may be provided with a reflective layer.

The first embodiment is as follows:

as shown in fig. 1, in the reactor core provided by the embodiment of the present invention, the solid fuel 1 may be a cross, and the four corners of the cross solid fuel 1 may be provided with rectangular virtual fuel 2.

The second embodiment is as follows:

as shown in fig. 2, in the reactor core provided by the embodiment of the present invention, the solid fuel 1 may be circular, and the periphery of the circular solid fuel 1 may be provided with a circular ring-shaped virtual fuel 2.

The third concrete embodiment:

as shown in fig. 3, in the reactor core provided by the embodiment of the present invention, the solid fuel 1 may be rectangular, and the periphery of the rectangular solid fuel 1 may be provided with a rectangular annular virtual fuel 2.

The fourth concrete embodiment:

as shown in fig. 4, in the reactor core provided by the embodiment of the present invention, the solid fuel 1 may be circular, the periphery of the circular solid fuel 1 may be provided with the circular ring-shaped virtual fuel 2, the periphery of the circular ring-shaped virtual fuel 2 may be provided with the circular ring-shaped solid fuel 1 again, and so on.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A reactor core, comprising: the solid fuel is provided with a virtual fuel at the periphery;

the size of the reactor core of the solid fuel and the virtual fuel matches the size of the core substructure.

2. The reactor core of claim 1 wherein the virtual fuel is consistent with a flow resistance of the solid fuel.

3. The reactor core of claim 1 or 2, wherein the dummy fuel employs a drag plug.

4. The reactor core according to claim 1 or 2, wherein the dummy fuel is an isotope-producing fuel.

5. The reactor core of claim 1 or 2, further comprising: a grid having a size matching a size of the core substructure;

the solid fuel and the virtual fuel are both placed in the framework and fixedly connected through the framework.

6. The reactor core of claim 5 wherein the periphery of the virtual fuel is provided with a reflective layer.

7. A reactor core, comprising: the size of the grid is matched with that of the core lower structure;

solid fuel and virtual fuel are alternately placed in the grid, and the solid fuel and the virtual fuel are fixedly connected through the grid.

8. The reactor core of claim 7 wherein the solid fuel and the virtual fuel are arranged in zones, the solid fuel being arranged in an inner layer and the virtual fuel being arranged in an outer layer.

9. The reactor core of claim 7 wherein the solid fuel and the virtual fuel are arranged in annular zones, the annular zones being an outer zone, a middle zone and a central zone from the outside to the inside, the virtual fuel being arranged in the central zone and the outer zone, and the solid fuel being arranged in the middle zone.

10. The reactor core according to any of claims 7-9, wherein the outermost layer of the solid fuel or the dummy fuel is provided with a reflective layer at its periphery.