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Fuel assembly end-piece with means for maintaining pencil ends and corresponding assembly

A support device and tube socket technology, applied in the assembly of fuel elements, reactor fuel elements, reactors, etc., can solve problems such as outer cladding damage

Active Publication Date: 2007-02-14
FRAMATOME ANP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] These frictional phenomena may lead to damage to the outer casing, which may result in the release of fission gases or fission products in the primary loop water

Method used

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  • Fuel assembly end-piece with means for maintaining pencil ends and corresponding assembly
  • Fuel assembly end-piece with means for maintaining pencil ends and corresponding assembly
  • Fuel assembly end-piece with means for maintaining pencil ends and corresponding assembly

Examples

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Embodiment Construction

[0043] To illustrate the background of the invention, Figure 1 schematically illustrates a nuclear fuel assembly 1 of a pressurized water reactor. Thus, in this case, water fulfills the role of coolant and moderator, i.e. slows down the neutrons produced by the nuclear fuel.

[0044] The assembly 1 extends in the longitudinal direction A vertically and in a rectilinear fashion.

[0045] Typically, the assembly 1 essentially comprises nuclear fuel rods 3 and a structure or framework 5 for supporting the rods 3 .

[0046] The supporting frame 5 usually includes:

[0047] - a lower socket 7 and an upper socket 9 arranged at the longitudinal ends of the assembly 1,

[0048] - the guide tube 11 used to house the control rods of the assembly (not shown) to control and stop the nuclear reactor, and

[0049] - Grid 13 for supporting rods 3 .

[0050] The sockets 7 and 9 are fixed to the longitudinal ends of the guide tube 11 .

[0051] The rod 3 extends vertically between the soc...

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PUM

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Abstract

The end-piece comprises means for maintaining adjacent longitudinal ends (19) of fuel pencils (3). The maintaining means are disposed in nodes of the substantially regular network formed by the pencils.

Description

technical field [0001] The invention relates to an end socket for a nuclear reactor fuel assembly, the fuel assembly includes fuel rods and a frame supporting the fuel rods, the fuel rods extend longitudinally and are arranged on substantially regular grid nodes, the support frame includes two end The end tube seat and the member connecting the end tube seat, the fuel rods are arranged longitudinally between the end tube seats. [0002] The invention finds particular application in the formation of lower headers for pressurized water reactor (PWR) fuel assemblies. Background technique [0003] EP-537044 describes a lower header for such an assembly. The lower header includes a horizontal wall provided with legs supported on the lower core plate of the nuclear reactor. The member connecting the lower header to the upper header consists of a guide tube. The guide tube is fixed on the horizontal wall of the tube base. The horizontal wall includes reinforcing ribs under its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/33G21C3/322
CPCG21C3/3305G21Y2002/101Y02E30/38G21C3/322Y02E30/40G21Y2004/301Y02E30/30G21C3/32G21C3/33
Inventor E·拉巴里埃安热洛·贝亚蒂M·博纳穆尔
Owner FRAMATOME ANP
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