Fuel assembly with compact structure, reactor and mobile carrier

A technology of fuel assembly and compact structure, which is applied in related fields of reactors, can solve the problems of complex flow regulation structure, increase the amount of structural materials, unfavorable core miniaturization, etc., achieve the effect of reducing structural materials, simplifying structural design, and avoiding adverse effects

Pending Publication Date: 2021-07-20
国科中子能(青岛)研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mature design for industrial application is the fuel rod structure. The PWR fuel assembly design is conventionally adopted. It is supported by the upper and lower nozzles and the intermediate grid. Since the intermediate grid constrains the fuel rods through the cells, it needs to occupy a certain amount of space. Design space, but also requires a complex flow regulation structure, which is not conducive to miniaturization design
Some fast reactor fuel

Method used

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  • Fuel assembly with compact structure, reactor and mobile carrier
  • Fuel assembly with compact structure, reactor and mobile carrier

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Such as figure 1 with figure 2 As shown, a compact structural fuel assembly of the present embodiment includes a core fixing plate 301, a plurality of fuel rods 300, a first guide plate 302, a support ring 303, and a throttle fin 304, and the throttle fins 304 are fixed On the outer side wall of the fuel rod 300, a support ring 303 is provided on a plurality of the fuel rods 300, and the first guide plate 302 is disposed on a plurality of fuel rods 300 and supported in the support ring 303. On the other end, the fuel rod 300 is fitted to the core fixing plate 301; the first guide plate 302 and the support ring 303 are made of a core coolant, a good safety, and a first guide plate. 302 and the support ring 303 will not be able to melt itself before operation, and will not affect the safety of equipment in the stack.

[0029] A compact structure fuel assembly, a structure is simplified, and the upper end of the fuel rod is constrained by a fixed plate, and ...

Example Embodiment

[0031] Example 2

[0032] Such as figure 1 with figure 2 As shown, a compact structural fuel assembly of the present embodiment includes a core fixing plate 301, a plurality of fuel rods 300, a first guide plate 302, a support ring 303, and a throttle fin 304, and the throttle fins 304 are fixed On the outer side wall of the fuel rod 300, a support ring 303 is provided on a plurality of the fuel rods 300, and the first guide plate 302 is disposed on a plurality of fuel rods 300 and supported in the support ring 303. On the other end, the fuel rod 300 is fitted to the core fixing plate 301; the first guide plate 302 and the support ring 303 are made of a core coolant, a good safety, and a first guide plate. 302 and the support ring 303 will not be able to melt itself before operation, and will not affect the safety of equipment in the stack.

[0033] Such as figure 1 As shown, the compact structural fuel assembly of the present embodiment further includes a second guide plate 305, ...

Example Embodiment

[0042] Example 3

[0043] A reactor of the present embodiment comprises the above-described compact structural fuel assembly. The upper end of the fuel rod in the reactive stack of the present embodiment is constrained by the fixed plate, and the first guide plate is constrained in the middle of the fuel rod, and the first guide plate located in the middle of the fuel rod is limited by the support ring, the first guide plate. The support ring is made of a core coolant, and the normal temperature is solid-state, and the operation before running avoids the flow of the core coolant, further reduces the influence of the flow of the core coolant while avoiding the structural material to neutron. The adverse effects of performance. The throttle wings can change the coolant flow area to achieve the flow regulation of the pile. The present invention reduces the structural material, solves the fixing support and compact problem of the fuel assembly, and modulate the fuel bar by a fused fix...

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PUM

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Abstract

The invention relates to a fuel assembly with a compact structure, a reactor and a mobile carrier, the fuel assembly with the compact structure comprises a nuclear fixing plate, a plurality of fuel rods, a first guide plate, support rings and throttling fins, the throttling fins are fixed on the outer side walls of one ends of the fuel rods, the plurality of fuel rods are respectively sleeved with the support rings, the first guide plate is arranged on the plurality of fuel rods in a penetrating manner and is supported on the supporting ring, and the other ends of the fuel rods are assembled and fixed on the nuclear fixing plate; and the first guide plate and the support ring are respectively made of a reactor core coolant. The first guide plate restrains and limits the middle of the fuel rod, the first guide plate located in the middle of the fuel rod is limited and supported through the supporting ring, and the first guide plate and the supporting ring are made of a reactor core coolant, are in a solid state at normal temperature to achieve a guide function and are melted before operation to avoid influence on flowing of the reactor core coolant; and the influence on the flow of a reactor core coolant is further reduced, and meanwhile, the adverse influence of a structural material on neutron performance is avoided.

Description

technical field [0001] The invention relates to the technical field related to reactors, in particular to a fuel assembly with a compact structure, a reactor and a mobile carrier. Background technique [0002] The fuel assembly is one of the core components of the reactor, and its structural size affects the design of the core structure, which in turn affects the volume and weight of the reactor, and plays a key role in the miniaturization and compact design of the reactor. At present, the mature design for industrial application is the fuel rod structure. The PWR fuel assembly design is conventionally adopted. It is supported by the upper and lower nozzles and the intermediate grid. Since the intermediate grid constrains the fuel rods through the cells, it needs to occupy a certain amount of space. Design space, but also requires a complex flow regulation structure, which is not conducive to miniaturization design. Some fast reactor fuel assembly designs cancel the interme...

Claims

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Application Information

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IPC IPC(8): G21C3/332G21C3/356
CPCG21C3/332G21C3/356Y02E30/30
Inventor 不公告发明人
Owner 国科中子能(青岛)研究院有限公司
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