Metal nuclear-fuel pin including a shell having threads or fibers made of silicon carbide (SiC)

A metal fuel and nuclear fuel technology, applied in the direction of reactor fuel elements, reactor fuel materials, nuclear engineering, etc., can solve the problem of no interface matrix lining, etc.

Inactive Publication Date: 2013-06-12
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0028] Rather than addressing the stated problems related to the behavior of UPuZr metal fuels for SFRs, the applicants determined that no prior art simultaneously addresses and proposes an interfacial matrix liner type solution based on a system that is easy to manufacture and use, The operation of the system can be generally reliably predicted based on physical, mechanical or chemical properties that are further studied and known to those skilled in the art

Method used

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  • Metal nuclear-fuel pin including a shell having threads or fibers made of silicon carbide (SiC)
  • Metal nuclear-fuel pin including a shell having threads or fibers made of silicon carbide (SiC)
  • Metal nuclear-fuel pin including a shell having threads or fibers made of silicon carbide (SiC)

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Embodiment Construction

[0054] Typically, and according to the invention, as figure 1 As shown, the pin includes cladding Go, linear metal nuclear fuel element C Nu , the cladding Go is made of Fe-Cr-Ni or Fe-Cr based stainless material, the linear metal nuclear fuel element C Nu Can be in the form of rods or billets of cylindrical shape with a small diameter, typically 5 to 10 mm, the fuel material can be of the UPuZr or UPuX type (X could be eg molybdenum). Thus, said pin comprises a first part and a second part, said first part comprising material C Nu of the fission column, the second part consists of a chamber P for the gas Le constitute.

[0055] Advantageously, it is provided that the annulus is lined with An or tantalum Ta, thus constituting a reservoir resistant to corrosion by molten actinides under operating conditions.

[0056] Advantageously, a surface oxidation step in air between 200 and 250 °C for several hours can be provided to obtain cubic MO 2 A layer of a few micrometers of ...

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Abstract

The invention relates to a nuclear-fuel pin including a linear element made of a metal nuclear-fuel material (CNu) consisting of uranium and / or plutonium, and cladding (Go) including Fe and Cr or an alloy including at least both of said elements, said pin being characterized in that it further comprises a main shell provided around the linear nuclear-fuel element, said shell including threads or fibers (FSiC) made of SiC. The invention also relates to a method for producing a nuclear-fuel pin according to the invention.

Description

technical field [0001] The field of the invention is that of fourth-generation fast neutron reactors designed to operate with fuels based on uranium and plutonium, and in the context of global warming, with the increasing In terms of performance and safety requirements, fourth-generation fast neutron reactors are being investigated in order to meet the growing world energy demand. Background technique [0002] Several reactor designs were studied and proposed using different technical solutions for the [fuel / cladding / coolant] system. [0003] The SFR (sodium-cooled fast reactor) concept, using liquid sodium for cooling (the operating temperature of the coolant is typically 500°C), is the subject of international consensus. Two perspectives are envisaged for nuclear fuels: oxide fuels (ref. (U,Pu)O 2 ) and alternative metal fuels such as UPuZr (eg U-20Pu (20% Pu)-10Zr (10% Zr)). High power SFR / oxide cores and low or medium power SFR / metal replacement cores are contemplated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/07G21C3/60
CPCG21C3/07G21C3/60Y02E30/30
Inventor F·马佐迪耶
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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