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Liquid lead-bismuth fuel rod for cooling ADS reactor and with weak PCI effect

A liquid lead and fuel rod technology, applied in the field of nuclear reactors, can solve the problems of assembly of high-level radioactive fuel components and weakening of PCI effect, etc., and achieve the effects of reducing PCI effect, easy assembly effect, and prolonging service life

Pending Publication Date: 2020-03-06
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these published patents do not use highly radioactive minor actinide nuclides MA as the fuel core to design fuel assemblies, and the relevant fuel assemblies of ADS reactors in the world do not take into account the assembly of high-level radioactive fuel assemblies and the weakening of PCI effects in terms of structure.

Method used

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  • Liquid lead-bismuth fuel rod for cooling ADS reactor and with weak PCI effect
  • Liquid lead-bismuth fuel rod for cooling ADS reactor and with weak PCI effect

Examples

Experimental program
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Effect test

Embodiment 1

[0034] as attached Figure 1-Figure 2 A kind of liquid lead-bismuth cooling fuel rod for ADS reactor with weak PCI effect shown, including a cylindrical shell 2 with a hollow structure inside, a cladding area 3 symmetrically sealed on both ends of the cylindrical shell 2, along the axis. To the plurality of fuel pellets arranged in the cylindrical shell 2 and arranged in a grid, in this embodiment, the fuel pellets are cylindrical rod structures, using Zr material as the matrix, high radioactive MA and Pu mixed metal fuels are used as core fuels.

[0035] The fuel pellets include a fuel rod body 11 and a cylindrical gap 12 extending through the central axis of the fuel rod body 11 , and a gap is reserved between the outer edge of the fuel rod body 11 and the cylindrical shell 2 . 13. The cross section of the gap 13 in the radial direction is annular, and its outer diameter matches the inner diameter of the cylindrical shell 2. In this embodiment, the cylindrical gap 12 is a c...

Embodiment 2

[0043] as attached Figure 1-Figure 2 A kind of liquid lead-bismuth cooling fuel rod for ADS reactor with weak PCI effect shown, including a cylindrical shell 2 with a hollow structure inside, a cladding area 3 symmetrically sealed on both ends of the cylindrical shell 2, along the axis. to a plurality of fuel pellets arranged in the cylindrical casing 2;

[0044] The fuel pellets include a fuel rod body 11 and a cylindrical gap 12 extending through the central axis of the fuel rod body 11 , and a gap is reserved between the outer edge of the fuel rod body 11 and the cylindrical shell 2 . 13;

[0045] The cylindrical gap 12 and the gap 13 together form a gas containing portion for fission gas and fission products generated during the energy release process of the fuel pellet.

[0046] The difference from the first embodiment is that in this embodiment, the cylindrical void 12 is a cylindrical void, and the cross-section along the radial direction is circular or elliptical; i...

Embodiment 3

[0048] On the basis of Embodiment 1 or Embodiment 2, the present invention also provides a liquid lead-bismuth-cooled ADS reactor with weak PCI effect, which includes a tube containing pressurized fluid and the weak PCI as described in Embodiment 1 or Embodiment 2. PCI effect liquid lead bismuth cooling fuel rods for ADS reactors.

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Abstract

The invention discloses a liquid lead-bismuth fuel rod for cooling ADS reactor and with a weak PCI effect. The liquid lead-bismuth fuel rod comprises a columnar shell, cladding areas symmetrically wrapping the two ends of the columnar shell, and a plurality of fuel pellets arranged in the columnar shell in the axial direction, wherein each fuel pellet comprises a main fuel rod body and a cylindrical gap, and a gap is reserved between the outer edge of the main fuel rod body and the cylindrical shell; and the cylindrical gaps and the gaps form a gas accommodating part together. The through cylindrical gap is formed along the central axis of each main fuel rod body, so the easy assembly effect of each fuel pellet is realized, remote mechanical operation can be conducted, and workers can be protected from high-radioactivity irradiation; after the assembly is finished, the columnar gaps and the gaps form the gas accommodating part together, so fission gas and fission products generated inthe energy release process of the fuel pellets can be effectively accommodated, the PCI effect is reduced, the columnar shell is prevented from being broken, the service life of the fuel pellets is prolonged, and better safety are obtained.

Description

technical field [0001] The invention relates to the technical field of nuclear reactors, in particular to a liquid lead-bismuth cooling fuel rod for an ADS reactor with weak PCI effect. Background technique [0002] High-level nuclear waste is less than 3% of the total spent fuel of nuclear reactors, but it concentrates more than 99% of the radioactivity of spent fuel, which is very dangerous to life on earth. Therefore, the treatment of high-level nuclear waste is the focus of radioactive waste management, and it is also a worldwide problem. In order to solve the problem of nuclear waste, an advanced closed fuel cycle, that is, separation-transmutation (PT) strategy, has been proposed internationally. Accelerator Driven Sub-critical System (ADS) is an ideal device for transmuting nuclear waste and producing energy. It has good resources and environmental benefits. The United States, the European Union, Japan, Russia, South Korea and my country have all developed it. Medium...

Claims

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Application Information

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IPC IPC(8): G21C3/06G21C3/10
CPCG21C3/06G21C3/10Y02E30/30
Inventor 陈忠吕中良赵子甲袁宝新潘冬梅马燕云
Owner SOUTHWEAT UNIV OF SCI & TECH
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