Method and device for measuring the power dissipated by a hydridation reaction in tubes and tubular claddings and the corresponding variation in electric resistance

a technology of hydridation reaction and power dissipation, which is applied in the field of methods and devices, can solve problems such as catastrophic fracture, and achieve the effects of preventing unplanned shutdown of commercial reactors, reducing the risk of hydration reaction, and ensuring the safety of the environmen

Inactive Publication Date: 2007-06-28
CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS (CSIC) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0006] The solution provided by this invention permits measurement of the hydridation kinetics in the actual tubular components, generally multi-layer, and under the same conditions of working temperature in which the hydridation of the component takes place, which is of particular economic relevance since it permits the design and choice of the appropriate composition of the different alloys used. An optimisation of these components will be able to help prevent unplanned shutdowns of commercial reactors. This possible improvement will also allow greater exploitation of the fuel by making it more robust, and a decrease in the mass of high-activity nuclear waste for the same amount of energy generated. By eliminating a possible source of leakage of components in the reactor water, the dosage of radiation received by maintenance personnel and personnel having to perform operations in the exchange zone will be reduced.
[0024] The control of these industrial components by means of the inventive method will permit the design and choice of the suitable composition of the different alloys used for the manufacture of those components, thereby avoiding their fracture.

Problems solved by technology

The massive hydridation of metallic industrial components is one of the causes of their becoming brittle and can lead to catastrophic fracture due to the formation of cracks.

Method used

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  • Method and device for measuring the power dissipated by a hydridation reaction in tubes and tubular claddings and the corresponding variation in electric resistance
  • Method and device for measuring the power dissipated by a hydridation reaction in tubes and tubular claddings and the corresponding variation in electric resistance
  • Method and device for measuring the power dissipated by a hydridation reaction in tubes and tubular claddings and the corresponding variation in electric resistance

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examples of embodiment

OF THE INVENTION

Example 1

Measurement of the Hydridation Kinetics in Tubes or Tubular Claddings

[0037] A method for measuring the dissipated power and the electric resistance and thereby obtain the hydridation kinetics in tubes or tubular claddings is embodied as stated below.

[0038] A nuclear fuel cladding of Zircaloy 2 is inserted in a high or ultra-high vacuum chamber; hydrogen or mixtures of hydrogen with other gas(es) is made to circulate via the interior of the tube at a pressure of 1 atmosphere and a renewal stream of 200 cm3 per minute. The partial pressure in the vacuum zone is 10−9 Torr owing to the permeation of hydrogen through the walls of the cladding. The cladding is heated by the Joule effect and the temperature in the centre of the cladding is monitored and kept constant at 360° C. (or other pre-established value) with a thermocouple and a temperature control system which acts on the current being applied in order to heat the cladding, the amount of current needed i...

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Abstract

The invention relates to a method and device for measuring hydridation kinetics at different temperatures in tubular industrial components. The invention consists in measuring the power dissipated by a hydridation reaction over time as well as the variation in the electric resistance during said reaction. The inventive method and device can be used to optimise industrial components, such as tubes and fuel claddings for nuclear reactor cores. In this way, safety is increased, with the prevention of unplanned shutdowns of commercial reactors and a decrease in high-activity nuclear waste.

Description

RELATED APPLICATIONS [0001] The present application is a Continuation of co-pending PCT Application No. PCT / ES2005 / 070011, filed Feb. 1, 2005 which in turn, claims priority from Spanish Application Serial No. P200400294, filed on Feb. 9, 2004. Applicants claim the benefits of 35 U.S.C. §120 as to the PCT application and priority under 35 U.S.C. §119 as to said Spanish application, and the entire disclosures of both applications are incorporated herein by reference in their entireties.SECTOR OF THE ART [0002] Measurement of hydridation reactions and kinetics of tubes and tubular claddings of metallic elements, metal alloys and any other material with and without protective coverings. STATE OF THE ART [0003] The massive hydridation of metallic industrial components is one of the causes of their becoming brittle and can lead to catastrophic fracture due to the formation of cracks. This process takes place in components in contact with water under pressure and / or boiling and at high tem...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C21D11/00G01N25/48G01N27/04G01N27/16G21C17/06G21C21/00
CPCG01N25/4846G01N27/041G21C17/06G21C21/00G21Y2002/50G21Y2004/40Y02E30/30G01N27/16
Inventor SACEDON ADELANTADO, JOSEDIAZ MUNOZ, MARCOSMOYA CORRAL, JOSEREMARTINEZ ZATO, BEGONAIZQUIERDO GOMEZ, JAIME
Owner CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS (CSIC)
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