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Small reactor core based on 9*9 rod grid fuel assembly

A fuel assembly and reactor technology, applied in the direction of reactor, reactor fuel element, nuclear reaction control, etc., can solve problems such as the inability to fully meet the needs of small nuclear power sources, reduce the generation of solid radioactive waste, simplify system design, and reduce the volume. Effect

Pending Publication Date: 2022-03-25
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, none of the existing cores can fully meet the needs of small nuclear power sources for reactor cores

Method used

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  • Small reactor core based on 9*9 rod grid fuel assembly
  • Small reactor core based on 9*9 rod grid fuel assembly

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Effect test

Embodiment 1

[0052] This embodiment provides a small reactor core based on a 9×9 grid fuel assembly. The core of this embodiment is loaded with 37 square 9×9 grid fuel assemblies, and the 37 fuel assemblies are arranged in a centrally symmetrical structure, totaling seven There are seven rows, 3 fuel assemblies are arranged in the first row and the seventh row, 5 fuel assemblies are arranged in the second row and the sixth row, and 7 fuel assemblies are arranged in the third row to the fifth row. The fuel assembly of this embodiment adopts truncated rod-type fuel elements for nuclear power plants.

[0053] In this embodiment, truncated rod-type fuel elements for nuclear power plants are used, and the core volume is small, and the reactivity is controlled and regulated only by control rods, which has a high degree of flexibility and maneuverability. The core can ensure no refueling during the whole life under the premise that the maximum unloading fuel consumption of the fuel assembly does ...

Embodiment 2

[0065] This embodiment adopts the core proposed in the above-mentioned embodiment 1, the thermal power is 8MW, and the low-enrichment fuel commonly used in nuclear power plants with an enrichment degree of no more than 5% is used, and 16 fuel assemblies on the periphery of the core are loaded with fuel with an enrichment degree of 4.45%. Rods, 21 fuel assemblies inside the core are loaded with 4.95% enrichment fuel rods, and the burnup life can reach 1000EFPD.

Embodiment 3

[0067] This embodiment adopts the core proposed in the above-mentioned embodiment 1, and the thermal power is 8MW, which breaks through the low enrichment limit commonly used in power stations. 16 fuel assemblies on the periphery of the core are loaded with 7% enrichment fuel rods, and 21 inside the core The fuel assembly is loaded with 8% enrichment fuel rods, and the burnup life can reach 1500EFPD.

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Abstract

The invention discloses a small reactor core based on 9 * 9 rod grid fuel assemblies. The reactor core is composed of 37 square 9 * 9 rod grid fuel assemblies. The fuel assembly adopts a truncated rod type fuel element for the nuclear power station. The reactor core is small in size, has high flexibility and adaptability, can meet special power utilization requirements, is arranged in the fields of remote areas, long-term scientific investigation bases, islands, pelagic seas and the like, and has wide market application prospects.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor cores, and in particular relates to a small reactor core based on a 9×9 rod grid fuel assembly. Background technique [0002] As an advanced small nuclear energy device, a small reactor can be manufactured and assembled in a factory due to its miniaturization, light weight and modularity, and then transported to the site by plane, train or heavy-duty vehicle and can be assembled for short-term power generation, eliminating the need for large The difficulty of large-scale construction reduces the cost of capital, and at the same time has strong mobility. Due to its high flexibility, small reactors can be widely used in remote areas, long-term scientific research bases, islands and nearby cities for special power and heat supply, and have broad market application prospects. [0003] Highly flexible small reactors have the following advantages over conventional power sources: [0004] 1) It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C5/02G21C3/326G21C3/328G21C7/08
CPCG21C5/02G21C3/3262G21C3/328G21C7/08Y02E30/30
Inventor 王连杰王诗倩汪量子秦冬李庆巨海涛魏彦琴曾未李翔
Owner NUCLEAR POWER INSTITUTE OF CHINA
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