Unlock instant, AI-driven research and patent intelligence for your innovation.

Fuel rod fission product release simulation device and its application method

A technology for simulating devices and fission products, applied in the field of simulating devices for releasing fission products from fuel rods, can solve the problems of high experimental cost, difficult experimental process and measurement, difficulty in accurately simulating physical and chemical phenomena, etc., and achieves easy installation, operation, and convenient processing Effect

Active Publication Date: 2022-02-11
NUCLEAR POWER INSTITUTE OF CHINA
View PDF29 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After investigation, the current international experimental devices for the study of the release characteristics of fission products in severe accidents mainly use irradiated real materials or simulated materials for research. It is carried out in the laboratory, which makes the experimental process and measurement very difficult, and at the same time leads to high experimental costs
However, it is difficult to accurately simulate the complex physical and chemical phenomena in the release process of fission products by using isotopes to simulate the release characteristics of fission products.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fuel rod fission product release simulation device and its application method
  • Fuel rod fission product release simulation device and its application method
  • Fuel rod fission product release simulation device and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment proposes a fuel rod fission product release simulation device. Such as figure 1 As shown, the simulation device of this embodiment is mainly composed of three parts: a heating furnace 1 , a crucible 2 , and a fuel rod simulation body 3 .

[0055] Such as figure 2 As shown, the heating furnace 1 of the present embodiment is composed of a heating furnace cover 1-2 and a heating furnace body 1-4.

[0056] The interior of the heating furnace body 1-4 is arranged with graphite barrel heaters 1-5, and the exterior is a composite insulation layer composed of hard felt and soft felt. A gas inlet 1-6 is provided at the bottom of the heating furnace body 1-4, and gas sampling ports 1-3 are arranged at different heights on the side wall.

[0057] The external gas circulation system constructs the internal heating atmosphere of the heating furnace body 1-4 through the gas inlet 1-6, and the elements released into the gas space by the fuel rod simulation body can...

Embodiment 2

[0065] In this embodiment, the simulation device proposed in the above-mentioned embodiment 1 is applied to the experimental research on the release characteristics of fuel rod fission products under severe accident conditions of different reactor types and different burn-up nuclear reactors.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a fuel rod fission product release simulation device and its application method. The simulation device of the invention includes a heating furnace, a crucible and a fuel rod simulation body; wherein the fuel rod simulation body is used to simulate the package of a prototype fuel element The shell and the core block; the crucible is used to support the fuel rod simulation body, and at the same time provide a gas circulation flow channel, which can contain the liquid melt when the fuel rod simulation body melts, and prevent the melt from damaging the heating furnace; the heating furnace is used for Fuel rod simulator heating. The present invention provides a fission product release characteristic test device without radioactive isotopes, and whose structure and physical and chemical processes are similar to real fuel rods. Fission product release properties.

Description

technical field [0001] The invention belongs to the technical field of severe accident experimental equipment, and in particular relates to a fuel rod fission product release simulation device applied under severe accident conditions and a use method thereof. Background technique [0002] Under normal operating conditions of a nuclear reactor, after neutron irradiation, fission products will gradually accumulate in the uranium dioxide grains in the fuel rods, and the fission gases will continue to diffuse to the grain boundaries and gradually accumulate between the fuel pellets and the cladding. in the air gap between. When a serious accident occurs in a nuclear reactor, the cladding of the fuel rod is ruptured, part of the fission gas is released to the outside of the fuel rod through the breach, and most of the fission products are still contained in the fuel pellets. As the temperature of the fuel rod continues to rise, the volatile fission products dissolved in the matr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/00G21C1/00
CPCG21C17/001G21C1/00Y02E30/30
Inventor 胡钰文宫厚军杨祖毛李朋洲卓文彬昝元锋李勇黎阳
Owner NUCLEAR POWER INSTITUTE OF CHINA