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Fuel assembly for lead bismuth stack

A technology for fuel assemblies and fuel elements, which is applied in the directions of reactor fuel elements, fuel elements, and fuel element assembly, etc., can solve problems such as unfavorable lead-bismuth stack refueling and refueling operations, low positioning accuracy, and large size.

Inactive Publication Date: 2017-05-31
TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most commercial nuclear reactors use tube seat fuel assemblies. Due to the large size of this type, there is no locking device, the positioning accuracy is not high, and it is not conducive to the refueling and discharging operation inside the lead-bismuth reactor.

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  • Fuel assembly for lead bismuth stack
  • Fuel assembly for lead bismuth stack
  • Fuel assembly for lead bismuth stack

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Embodiment Construction

[0022] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...

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Abstract

The present invention provides a fuel assembly for a lead bismuth stack, the fuel assembly includes an inner shaft, a bearing part, a casing and a fuel element; the inner shaft is arranged in the casing by the positioning and supporting effect of the bearing part, the inner shaft and the casing are locked and released by up-and-down moving of the inner shaft, beneficial effects are that on the basis of the compact space layout of the lead bismuth stack and heat transfer characteristics of a primary circuit lead bismuth coolant, the heat transfer efficiency of a primary circuit can be improved by optimization of a cooling channel of the fuel element and positioning design of a locking device, overheating of the fuel assembly is prevented, reliable locking and releasing operation of the fuel assembly and an outer fixed frame can be realized, and large size tube type fuel assembly device used at present in the prior art can be replaced.

Description

technical field [0001] The invention belongs to the field of fuel assemblies used in lead-bismuth nuclear reactors, and in particular relates to a method of optimizing the cooling channel of the fuel element and the positioning design of the locking device to improve the heat exchange efficiency of the primary circuit, prevent the assembly from overheating, and realize the fuel assembly and the positioning design of the locking device. Reliable lock-and-release operation of fuel assemblies with external fixed grids. Background technique [0002] At present, most of the commercial nuclear reactors use the tube seat type fuel assembly. Due to the large size of this type, there is no locking device, the positioning accuracy is not high, and it is not conducive to the refueling and discharging operation inside the lead-bismuth reactor. The fuel assembly of lead-bismuth nuclear reactor requires compact structure, smooth flow channel, accurate positioning, safety and reliability, ...

Claims

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Application Information

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IPC IPC(8): G21C3/08G21C3/30G21C3/356
CPCG21C3/08G21C3/30G21C3/356Y02E30/30
Inventor 盛选禹殷世聪葛云贵张志擎刘传孙嘉琦王亮君徐雅晨邵荣郭豹孔文文王鑫磊成昱旻凌晨尹娇妹艾雪松
Owner TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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