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Device for generating a high temperature gradient in a nuclear fuel sample

A high temperature, nuclear fuel technology, used in fuel elements, nuclear engineering, nuclear power generation, etc., can solve problems such as cladding rupture and cannot be tested individually

Inactive Publication Date: 2013-10-23
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Anticipating possible advances in issues related to the risk of cladding rupture due to fuel rod pellet-cladding interaction / stress corrosion (PCI / SC) under unexpected circumstances, the limited number of full-power ramp tests made it impossible to independently Test all parameters and fuel grades or approach physical phenomena in a decoupled manner

Method used

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  • Device for generating a high temperature gradient in a nuclear fuel sample
  • Device for generating a high temperature gradient in a nuclear fuel sample
  • Device for generating a high temperature gradient in a nuclear fuel sample

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Embodiment Construction

[0044] The applicant has developed a method such as figure 1 The MERARG furnace shown, which can heat metal crucibles via inductive coupling. A so-called induction coil 3 through which a high-frequency current passes can generate an induced current in the metal crucible 1 . Through the Joule effect, these induced currents thereby heat the walls of the crucible, which in turn raises the sample isothermally to a high temperature, the crucible itself being placed in the tube 2 .

[0045] However, the use of induction heating does not translate directly to the DURANCE device. In fact, it cannot be considered to use the resistor in the center of the pellet as a susceptor for induction (corresponding to the heated part, also called a susceptor, and usually the susceptor must be an electrical conductor), because the zirconium alloy located between the center of the pellet and the ring The (metal element) cladding is subject to coupling. Therefore, the cladding is heated in the sam...

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Abstract

An assembly comprising a sample and a device for generating a high temperature gradient in said sample, comprises: a chamber inside which said sample is placed; a resistor passing through said sample; first induction means at the periphery of the chamber to create an electromagnetic field; second induction means connected to said resistor and capable of picking up said electromagnetic field so as to create an induced current circulating in said resistor.

Description

technical field [0001] The field of the invention is that of heating devices comprising controllably generating a thermal gradient within a sample of particular interest in controlling and characterizing the behavior of nuclear fuel under thermal gradients, and which can be used in high nuclear activity laboratory. Background technique [0002] In this field, the applicant has proposed to generate thermal gradients by electrical heating of the ceramic core and water circulation outside the ceramic cladding. However, such devices have not yet been used on irradiated nuclear fuel. [0003] It is also known from US Pat. No. 4,643,866 that a thermal gradient can be ensured by using microwaves to heat the core of the ceramic and to circulate water outside the ceramic cladding. [0004] The publication Nuclear Engineering and Design 26, (1974) 423-431, J.F. Whatham also describes the electrical heating of ceramics with pressurized water circulation cooling. [0005] Currently, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/00
CPCG21C17/06G21C17/112H01F38/14Y02E30/30G21C3/20G21C21/02
Inventor Y·蓬蒂永L·德格朗热E·阿尼斯O·布雷蒙
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES