An electric heating device and assembly process for simulating nuclear reactor fuel rods

Abstract

The invention discloses an electric heating device and an assembly process for simulating nuclear reactor fuel rods, comprising a simulated cladding and a simulated fuel element core block, 16 through holes extending along the axial direction are arranged on the simulated fuel element core block. A thermocouple wire positive electrode is installed in some of the through holes, a thermocouple wire negative electrode is installed in some of the through holes, and an inert gas is stored in the remaining through holes; An electric heating rod is installed in the inner cavity; a plurality of external wall temperature thermocouples are installed outside the simulated enclosure. The invention is used for simulating nuclear reaction fuel rods in a laboratory, and carries out experiments on high-temperature degradation and re-flooding behavior experiments of fuel rods used in pressurized water reactors under serious accident conditions. The working medium is water medium, steam medium or inert gas medium, the working pressure is from normal pressure to 5MPa, the long-term working temperature is from normal temperature to 1800°C, and the short-term working temperature is from normal temperature to 2400°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...

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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

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