Spherical flue element equivalent model thermotechnical waterpower experimental apparatus

Abstract

The invention discloses a spherical flue element equivalent model thermotechnical waterpower experimental apparatus comprising a pressure-bearing component, an electric heating component, an insulation component, a seal component, a pressure measurement component and the like, and field assembly and disassembly can be realized between the components. According to the spherical flue element equivalent model thermotechnical waterpower experimental apparatus, a banded fin thin rod bundle electric element is taken as an equivalent model structure of the spherical flue element, electrical heating method is realized, single-phase water flow and heat transfer experiment can be developed, and thermal-hydraulics of the spherical flue element can be reflected. The pressure measurement component can be assembled and disassembled on spot, consumables such as an O-shaped seal ring and a lead pressure pipe are convenient to replace, thereby reducing loss and cost. A grid spacer plays a role in transverse orientation for the banded fin thin rod bundle electric element, and a single-cone structure of the grid spacer can guide a plurality of the banded fin thin rod bundles to assemble, thereby reducing the difficulty of assembling and improving the efficiency of assembling. Copper braid is adopted to connect a lower conducting element and a lower conductive contact to realize flexible connection, so that the problem caused by electric component thermal expansion is effectively solved.

Description

technical field [0001] The invention relates to a thermal-hydraulic experiment device, in particular to a thermal-hydraulic experiment device of an equivalent model of a spherical fuel element. Background technique [0002] Spherical fuel element water-cooled reactor is a new concept nuclear reactor, which expands the application of spherical fuel elements to light water reactors. Unlike high-temperature gas-cooled reactors, this type of reactor uses light water as a coolant, and the diameter of spherical fuel elements is smaller. The spherical structure and tiny size of the spherical fuel element reduce the possibility of critical heat flux (CHF); the all-ceramic material avoids the zirconium water reaction under accident conditions and avoids the hydrogen explosion accident; therefore, the spherical fuel element water-cooled reactor has Higher inherent security. [0003] The research and development of water-cooled reactors with spherical fuel elements is facing a series ...

AI Technical Summary

Problems solved by technology

This kind of heater has a bar-shaped structure, which can simulate traditional rod-shaped fuel elements, but it has no similarity with spherical fuel elements, and cannot be used as an equivalent model structure of spherical fuel elements, and cannot simulate spherical fuel elements

This kind of heater uses molten mixture to burn to simulate heat release, which can simulate one-time experiments such as fuel element burning, but is not suitable for simulating the thermal-hydraulic characteristics of spherical fuel elements that require repeated experiments.

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