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Fuel plate and preparation method thereof

A fuel plate and rolling equipment technology, which is applied in the manufacture of reactors, greenhouse gas reduction, climate sustainability, etc., can solve the limitation of operating parameters of fuel assemblies, the thinning of fuel plate cladding thickness, and the impact of safe operation of fuel assemblies. and other problems, to achieve the effect of improving the thickening phenomenon, the quadrilateral shape and the non-uniformity

Active Publication Date: 2019-12-24
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Claims
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AI Technical Summary

Problems solved by technology

"Dog bones" will have adverse effects on the fuel plate: 1) the cladding thickness of the fuel plate in the thickened area is thinned due to the thickening of the core; power peak
This affects the safe operation of the fuel assembly in the stack and limits the operating parameter limits of the fuel assembly

Method used

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  • Fuel plate and preparation method thereof
  • Fuel plate and preparation method thereof
  • Fuel plate and preparation method thereof

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Embodiment Construction

[0041] In the prior art, there is often a phenomenon that the thickness of the fuel cores at both ends of the fuel plate is higher than that of the middle part (that is, the dog-bone phenomenon). In view of this, the application provides a fuel plate and a preparation method thereof. By improving the initial shape of the core billet, the two ends of the core billet are chamfered to a certain extent, and the fuel load at both ends of the core billet is reduced, so that the dog-bone phenomenon can be significantly reduced after the core billet is hot-rolled and cold-rolled , thereby improving the phenomenon of thickening at both ends of the fuel plate formed by the existing rolling process.

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0043] The first aspect of the ...

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Abstract

The invention provides a fuel plate and a preparation method thereof. The method includes the steps of chamfering two side faces of a core blank; assembling the chamfered core blank; rolling an assembled assembly to prepare the fuel plate. After the core blank is chamfered, the thickness of fuel core bodies at both ends of the fuel plate can be reduced during rolling, and the problem that the thickness of the fuel core bodies at both ends of the fuel plate is higher than that of the core body of the intermediate part is solved. Therefore, the safety of a fuel assembly is improved, and the service life of the fuel assembly is prolonged.

Description

technical field [0001] The invention relates to the field of fuel plate processing, in particular to a fuel plate and a preparation method thereof. Background technique [0002] Dispersion fuel for research and test reactors is a mixture of fissile nuclear fuel particles dispersed in a matrix with low neutron-absorbing capacity. In dispersoid fuels, the high-energy fission reactions are isolated by the matrix, preventing fission-induced material degradation. At the same time, the dispersoid fuel can achieve high burnup (heavy atom fission number) under high power density, and can produce high neutron fluence required for the operation of research and test reactors. [0003] In 1978, in order to reduce the risk of nuclear proliferation, Argonne Laboratory (ANL) in the United States implemented the "Reducing Fuel Enrichment for Research and Test Reactors Program (RERTR)". The main objective of the program is to develop the technology needed to replace existing highly enriche...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C21/06G21C21/10
CPCY02E30/30
Inventor 张文惠王玉林金华晋王玉岭张爱民康亚伦张应超柯国土袁履正陈会强
Owner CHINA INSTITUTE OF ATOMIC ENERGY