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An integrated compact core with radial power flattening

A radial power, compact technology, applied in the direction of moderator/core structure, reactor, greenhouse gas reduction, etc., can solve the problems affecting the miniaturization and light weight of the reactor, unfavorable core size, large core share, etc. , to achieve the effect of being conducive to miniaturization and light weight, reducing heat production capacity, and compact layout

Active Publication Date: 2021-05-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing problem of this kind of fuel rod core in the prior art is that the fuel rod cladding and the like occupy a relatively large share of the core, which is not conducive to reducing the size of the core and affects the miniaturization and weight reduction of the reactor.
Since the integrated fuel scheme is adopted instead of the discretized fuel rods in the prior art, the power flattening methods such as adjusting the fuel enrichment degree or arranging combustible poisons in the prior art are not applicable, and a new power flattening method needs to be sought

Method used

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  • An integrated compact core with radial power flattening
  • An integrated compact core with radial power flattening
  • An integrated compact core with radial power flattening

Examples

Experimental program
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Effect test

Embodiment 1

[0022] This embodiment provides an integrated compact core with radial power flattening, which has a simple structure and low cost. Through the non-uniform arrangement of coolant, it can ensure good power flattening effect in the core, compact layout, and Conducive to miniaturization and light weight of the reactor.

[0023] Such as figure 2 and 3 As shown, the core includes: an integrated fuel 5, a coolant flow channel unit 6, and a reflection layer 7, the reflection layer 7 is coaxially wrapped around the outer periphery of the integrated fuel 5, and the integrated fuel 5 is an integrally formed cylindrical fuel. Heat generated by fission, so as to output power, after the fission, the power at the center of the core is the largest, and the power gradually decreases from the center to the outer layer along its radial direction; the reflection layer 7 is used to reflect the neutrons leaked from the integrated fuel 5 back Integrated fuel 5; the integrated fuel 5 is provided ...

Embodiment 2

[0026] On the basis of Example 1, such as figure 2 As shown, both the central coolant flow channel and the outer coolant flow channel adopt circular tubular channels, and the inner diameter of the central coolant flow channel in the center of the integrated fuel 5 is the largest, and the coolant flow from the central coolant flow channel to the outermost layer Channel group, the inner diameter of the outer layer coolant channel decreases layer by layer, the center coolant channel and its adjacent layer coolant channel group and between the two adjacent layers of coolant channel group are equidistantly distributed, the same layer All outer coolant runners in a coolant runner group have the same inside diameter.

Embodiment 3

[0028] On the basis of Example 1, such as image 3 As shown, both the central coolant flow channel and the outer coolant flow channel adopt circular tubular channels, and the inner diameters of the central coolant flow channel on the integrated fuel 5 and all the outer layer coolant flow channels are the same, and the central coolant flow channel And more than two layers of coolant flow channel groups are on the integrated fuel 5, and the radial distance from the center to the outer layer increases layer by layer.

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Abstract

The invention discloses an integrated compact reactor core with radial power flattening, comprising: integrated fuel, coolant flow channel unit and reflective layer, the reflective layer is coaxially wrapped on the outer periphery of the integrated fuel, and the integrated fuel is integrated The formed cylindrical fuel is used for fission output power, and the reflective layer is used to reflect the neutrons leaked from the integrated fuel back to the integrated fuel; a coolant flow channel unit filled with coolant is provided on the integrated fuel, including a The central coolant flow channel of the chemical fuel center and more than two layers of coolant flow channel groups radially distributed along the integrated fuel with the central coolant flow channel as the center, each layer of coolant flow channel group is distributed in a regular polygon, from the center to the outside The coolant in the unit area of ​​the integrated fuel intercepted by the layer along the radial direction gradually decreases; the central coolant flow channel is along the axial direction of the integrated fuel, and the outer layer coolant flow channel is parallel to the axial direction of the integrated fuel; wherein, the cooling The agent is used to take away the heat generated by the fission of the integrated fuel.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor core design, in particular to an integrated compact core with radial power flattening. Background technique [0002] Due to the high neutron flux density in the central area of ​​the reactor core and the low neutron flux density in the edge area of ​​the core, more heat is generated in the central area of ​​the reactor core and less heat is generated in the edge area, resulting in the power of the core The distribution is uneven and the power peak factor is very large, which limits the overall output power of the reactor and affects the safety and economy of the reactor. Therefore, it is necessary to flatten the power of the reactor. [0003] Such as figure 1 As shown, the reactor core capable of power flattening in the prior art is composed of fuel assemblies 3 and coolant 1, etc., each fuel assembly 3 is arranged in a rectangular array with a plurality of fuel rods 2 at equal intervals,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C5/12G21C15/02G21C15/10G21C15/14
CPCG21C5/12G21C15/02G21C15/10G21C15/14Y02E30/30
Inventor 刘超王磊金鸣张勇孙燕婷
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI