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Fuel rod cladding, fuel rod and fuel assembly

A technology for fuel elements and fuel assemblies, applied in the field of nuclear energy, can solve problems such as cladding formation defects, and achieve the effects of reducing the risk of failure, avoiding corrosion damage, and reducing hydraulic resistance

Active Publication Date: 2016-06-29
JOINT CO AKME ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using resistance welding to fix the wire to the cladding can lead to the formation of defects in the cladding

Method used

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  • Fuel rod cladding, fuel rod and fuel assembly
  • Fuel rod cladding, fuel rod and fuel assembly
  • Fuel rod cladding, fuel rod and fuel assembly

Examples

Experimental program
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Effect test

specific Embodiment

[0051] Tubes with 4 helical fins for the manufacture of fuel element claddings were made by cold rolling ЭП823-Ш billet tubes.

[0052] The diameter of the cladding along the fins is 13.5 mm, the wall thickness of the cladding is 0.4 mm, and the inner diameter of the cladding is 11.2 mm. The height of the fins is 0.75 mm, the width at half the height of the fins is 0.75 mm, and the ratio of fin height to wall thickness is 1.85. The cross section of the fin is trapezoidal with an inner rounded corner, the radius of the inner circle is 0.2 mm, and the radius of the rounded portion of the trapezoid is 0.7 mm. The opening angle of the fins is 30°. The fins were wound in a helix (clockwise winding) with a spacing of 750mm between the fins.

[0053] The finished cladding is filled with uranium dioxide-based nuclear fuel and sealed with upper and lower ends (plugs) to make fuel elements.

[0054] In order to make fuel assemblies, the assembled fuel elements are installed on the lo...

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PUM

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Abstract

The invention relates to the field of nuclear engineering and can be used in the manufacture of fuel rods and fuel assemblies for heavy liquid metal cooled reactors, and also in the manufacture of fuel rod simulators for use in irradiation devices designed to test the operability of real fuel assemblies. The present cladding of a fuel rod for a heavy liquid metal cooled reactor is in the form of a weldless tubular element with helically-coiled fins disposed on the outer surface of said element, which is made from a ferritic-martensitic chromium-silicon steel with a minimum ferrite grain size of 7 on the GOST 5639 scale, wherein each fin has an opening angle of from 22 to 40 DEG C (preferably from 30 to 40 DEG C) and the cross-section of the fin is in the shape of a trapezoid with rounded corners at the top of the trapezoid and smooth corners at the base of the trapezoid. Also disclosed are a fuel rod comprising the above cladding, and a fuel assembly. The technical result of the invention is an improvement in the performance characteristics of fuel rods and assemblies as a result of the long-term resistance of the cladding in the environment of a heavy liquid metal coolant such as lead or a eutectic of lead and bismuth.

Description

technical field [0001] The invention relates to the field of nuclear energy and can be used for the manufacture of fuel elements (твэлов) and fuel assemblies (TBC) for reactors containing liquid heavy metal coolants (ТЖМТ), and can also be used for the manufacture of irradiation devices used in the study of the properties of real fuel elements Fuel element simulator. Background technique [0002] A fuel element cladding widely used in the state of the art is a metallic tubular element made of a metal or alloy resistant to liquid heavy metal coolants, on which at least one boss is helically arranged. Fins protruding from the surface of the tubular element (see abstract of JPH02163694 publication). The fuel element according to this patent itself consists of a cladding in which particles of uranium oxide or plutonium are loaded and plugs are fitted at both ends of the cladding. The helical fins of the cladding are integral with a tubular element having a defined height and n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/02G21C3/08G21C3/30
CPCG21C3/04G21C3/07G21C21/02G21C3/30G21C3/08Y02E30/30G21C1/03G21C3/12
Inventor 亚奇拉夫·法斯列维奇·德鲁诺夫维克多·米挨罗维奇·马尤罗夫巴菲尔·安德维奇·波美斯科夫阿莱克桑德·伊夫耿捏维奇·鲁萨诺夫阿莱克桑德·阿莱克塞维奇·斯米诺夫塞耿·维克多罗维奇·舒勒平塞伊迪·米菲索维奇·萨里克普罗
Owner JOINT CO AKME ENG
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