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Fuel component and fixing method for liquid heavy metal cooling reactor

A technology of liquid heavy metals and fuel components, applied in the direction of fuel elements, assembly of fuel elements, reduction of greenhouse gases, etc., can solve problems such as reducing reactor economy and increasing reactor coolant consumption, so as to improve reliability and safety, structure The effect of simple, simple refueling operation method

Inactive Publication Date: 2013-05-01
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This scheme needs to reserve a large enough fuel assembly operating space in the lower part of the core. This area needs to be filled with a large amount of liquid lead-bismuth alloy, which increases the amount of reactor coolant and reduces the economic efficiency of the reactor.

Method used

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  • Fuel component and fixing method for liquid heavy metal cooling reactor
  • Fuel component and fixing method for liquid heavy metal cooling reactor
  • Fuel component and fixing method for liquid heavy metal cooling reactor

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Embodiment Construction

[0016] Such as figure 1 As shown, the fuel assembly of the present invention is made up of fuel rod 1, assembly casing 2, positioning grid 3, upper grid 4, lower grid 5, operating head 6, pin 7 and positioning frame 8, and is characterized in that it adopts The casing of the circular assembly, the fuel rods are arranged in a circular shape, and the pins are provided with a positioning frame. The positioning grid 3 is located in the middle of the bundle of fuel rods 1 and plays the role of positioning the fuel rods 1. The specific number can be adjusted according to the design of the specific reactor. The upper grid 4 and the lower grid 5 are respectively arranged with the upper end and the lower end of the fuel rod 1 bundle, and the fuel rod 1 is fixed therein. The operating head 6 is located at the upper end of the fuel assembly, and is used to match the refueling mechanism when refueling the reactor. The pin 7 is located at the lower end of the fuel assembly, and the pin 7...

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Abstract

The invention relates to a fuel component and a fixing method for a liquid heavy metal cooling reactor. The fuel component comprises fuel rods, component sleeves, a positioning grid rack, an upper grid, a lower grid, an operation head and a pin, wherein the component sleeves are circular sleeves; the fuel rods are arranged in a circular ring-shaped manner; and a positioning rack is arranged at the periphery of the pin. Through the adoption of the circular sleeves and the pin positioning rack, the fuel component has the advantages that the buoyancy of liquid heavy metal coolant is overcome, so that the fuel component can be fixed in the liquid heavy metal reactor; no movable part is required; the structure is simple; the reliability and the safety of the reactor are improved effectively.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel assembly and nuclear reactor design, and in particular relates to a fuel assembly and a fixing method for a liquid heavy metal cooling reactor. Background technique [0002] Liquid heavy metal cooled pool reactors mainly refer to lead or lead alloy cooled reactors, which have special advantages in terms of safety and economy, and are one of the hotspots in the field of international advanced nuclear energy research. In 2011, the Chinese Academy of Sciences launched the "Future Advanced Nuclear Fission Energy-ADS Transmutation System" strategic pilot technology project, and the lead-bismuth alloy cooling reactor is one of the main research contents of the project. [0003] Fuel assembly design is one of the key contents of reactor design. Liquid heavy metal reactors use liquid heavy metal coolants, such as lead or lead-bismuth alloys, which have a high density, generally greater than 10,000kg...

Claims

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Application Information

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IPC IPC(8): G21C3/12G21C3/33
CPCY02E30/40Y02E30/30
Inventor 陈钊何梅生柏云清陈红丽吴宜灿
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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