Nuclear reactor fuel rod simulating electric heating device and assembly process

A nuclear reactor fuel and electric heating device technology, which is applied in nuclear reactor monitoring, reactor, nuclear engineering, etc., can solve the problem of not being retrieved, and achieve the effect of high temperature resistance

Active Publication Date: 2017-01-11
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Key words High temperature, Simulator, Electric Heating, zirconium-steam / water reaction, Reflooding, Fuel Rod, Quench ) has been searched on the patent network and the Chinese and English periodicals, but no records related to this technology have been retrieved

Method used

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  • Nuclear reactor fuel rod simulating electric heating device and assembly process
  • Nuclear reactor fuel rod simulating electric heating device and assembly process
  • Nuclear reactor fuel rod simulating electric heating device and assembly process

Examples

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Embodiment

[0056] Such as Figures 1 to 4 As shown, the present invention is an electric heating device for simulating nuclear reactor fuel rods, including a simulated cladding 1, and a plurality of simulated fuel element pellets 2 stacked in the axial direction of the simulated cladding 1 are arranged in the simulated cladding 1 , the cross-section of the simulated fuel element pellet 2 is an annular structure, and 16 through holes 8 extending along its axial direction are arranged on the simulated fuel element pellet 2, and thermoelectric Coupled wire positive electrode 4, a thermocouple wire negative electrode 6 is installed in part of the through holes 8, and inert gas is stored in the remaining through holes 8; Electric heating rod 3; the electric heating rod 3 is made of tungsten, molybdenum, tungsten-molybdenum alloy or molybdenum-copper alloy. An insulating layer 5 is installed in the gap, and a plurality of external wall temperature thermocouples 7 are installed outside the sim...

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PUM

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Abstract

The invention discloses a nuclear reactor fuel rod simulating electric heating device and an assembly process. The device comprises a simulation jacket and simulation fuel element pellets, each simulation fuel element pellet is provided with 16 through holes axially extending along the simulation fuel element pellet, thermocouple wire anodes are mounted in part of the through holes, thermocouple wire cathodes are mounted in part of the through holes, and inert gas is stored in the rest through holes. Electric heating rods are mounted in an inner cavity of each simulation fuel element pellet, and a plurality of external wall temperature thermocouples are mounted on the outer side of the simulation jacket. The electric heating device is used for laboratory simulation of nuclear reactor fuel rods to carry out high-temperature degradation and reflooding behavioral experiments of fuel rods for pressurized water reactors under severe accident conditions. A working medium is an aqueous medium, a steam medium or an inert gas medium, a working pressure is 5MPa, a long-term working temperature is 1800 DEG C, and a short-term working temperature is 2400 DEG C.

Description

technical field [0001] The invention relates to an electrical tool, in particular to an electric heating device and an assembly process for simulating nuclear reactor fuel rods. Background technique [0002] Improving the safety of reactor operation is a constant task in the development of nuclear energy applications. After the Fukushima accident, international nuclear technology developed countries such as the United States and France have pointed out that mitigation and prevention are equally important, especially for some serious accidents with low probability and high risk that must be paid enough attention to. In the management of severe accidents, flooding the core with water is a very important response strategy. It plays an important role in terminating the development of the accident and mitigating the consequences of the accident. The importance of this strategy has been reflected in the Fukushima nuclear accident. However, before the fuel assembly is successfully...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/00G21C17/04G21C17/07
CPCG21C17/00G21C17/002G21C17/04G21C17/07Y02E30/30
Inventor 张震闫晓昝元锋张友佳
Owner NUCLEAR POWER INSTITUTE OF CHINA
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