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Melt testing apparatus having elevating chassis

A test device and melting technology, which can be used in nuclear reactor monitoring, reactors, nuclear power generation, etc., and can solve problems such as difficulty in taking out solid blocks and shells

Pending Publication Date: 2018-03-16
STATE NUCLEAR HUAQING BEIJING NUCLEAR POWER TECH R & D CENT
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  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that these melt preparation / testing devices have some shortcomings to varying degrees
[0004] In particular, in the existing melt test device that adopts cold crucible induction heating, since the cooling jacket is connected with the water-cooled chassis, after the end of the test, it is difficult to take out the cooled solid block and shell of the melt

Method used

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  • Melt testing apparatus having elevating chassis
  • Melt testing apparatus having elevating chassis
  • Melt testing apparatus having elevating chassis

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specific Embodiment 1

[0035] Through a specific example, a test section for studying the cooling characteristics of the surface of the molten pool is described in detail, which mainly includes a cold crucible, an induction heating coil, and a chassis lifting mechanism. The cold crucible is straight and consists of two parts, the bottom water-cooled chassis and the vertical water-cooled casing, which are used to hold the zirconia melt (2700-3000°C), and provide a cooling boundary for the molten pool to form a zirconia dense shell. The inner diameter of the crucible is 220mm. The material of the water-cooling sleeve is copper, and the outer tube length of the water-cooling tube of the water-cooling sleeve is 450mm, which is circularly arranged on the base of the outer chassis in a straight cylinder shape, and the distance between the copper tubes is 1-2mm. The inner and outer pipes are connected to the base by threads, which is convenient for disassembly and replacement. The upper end of the outer p...

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Abstract

The invention provides a melt testing apparatus having an elevating chassis. The melt testing apparatus is characterized in that the melt testing apparatus comprises a water cooling cannula (1), an induction heating coil, and a chassis system, and the water cooling cannula (1) and the chassis system form a cold crucible, wherein the chassis system comprises an elevating system (8). According to the melt testing apparatus, multiple melt-related testing researches can be developed, after the test is finished, a molten pool and a casing layer structure at an upper part of the molten pool are completely removed.

Description

technical field [0001] The invention relates to the technical field of thermal engineering, in particular to a melt testing device with a lifting chassis. Background technique [0002] With the improvement of the design power of the large advanced pressurized water reactor core, the economical efficiency of nuclear power has been further improved, and at the same time, higher requirements for its safety have been put forward. In the event of a serious accident in which the core loses cooling, the fuel elements melt due to insufficient cooling, forming a core melt whose main components are uranium oxide, zirconium oxide, and unoxidized liquid metal. At the same time, due to the existence of decay heat, the internal temperature of the melt can reach above 2700°C, which makes the surface of the pressure vessel bear a high heat load. When the local wall heat flux exceeds the critical heat flux there, the heat transfer on the outer surface of the pressure vessel is sharp Deterio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/00
CPCG21C17/001Y02E30/30
Inventor 裴杰陈炼孙财新韩昆李涛陈颖田道贵崔明涛徐昕晨邸智王嘉鹏
Owner STATE NUCLEAR HUAQING BEIJING NUCLEAR POWER TECH R & D CENT
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