A slender non-uniform heating element and its processing technology
A technology of non-uniform heating and uniform heating, applied in the shape of heating elements, fuel elements, nuclear engineering, etc., can solve problems such as inability to withstand pressure
Active Publication Date: 2016-08-17
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
[0004] The purpose of the present invention is to provide a slender non-uniform heating element and its processing technology to solve the problem that the current slender non-uniform heating element cannot withstand pressure, so that it can withstand external pressure
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[0029] Such as Figures 1 to 3 As shown, a slender non-uniform heating element of the present invention and its processing technology include an upper nickel electrode tube 1, a non-uniform heating tube 2, a lower nickel electrode tube 4, and a copper electrode tube 5 which are sequentially connected by silver brazing , a plurality of ceramic blocks 6 are installed in the uneven heating tube 2, and the ceramic block 6 and the uneven heating tube 2 form a pressure-bearing structure; wherein, the uneven heating tube 2 includes two metal tubes, and the wall thickness of each metal tube is Gradually increase from one end to the other end, and the ends of the two metal pipes with the smallest wall thickness are connected by butt welding; a plurality of wall temperature measurement structures 3 are distributed in the uneven heating pipe 2, and the wall temperature measurement structures 3 include copper rings 8, which are installed The corresponding ceramic block 6 of the copper rin...
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The invention discloses a long and thin non-uniform heating element and a processing method thereof. The long and thin non-uniform heating element comprises an upper nickel electrode tube, an non-uniform heating tube, a lower nickel electrode tube, and a copper electrode tube which are connected successively via silver brazing; a plurality of ceramic blocks are arranged in the non-uniform heating tube; and a bearing structure is composed of the ceramic blocks and the non-uniform tube. According to the long and thin non-uniform heating element, the ceramic blocks are arranged in the non-uniform heating tube; the inner sides of the ceramic blocks are of cavity structures; the outer surfaces of the ceramic blocks matches the inner side of the non-uniform heating tube; an integral internal pipe is formed by the cavity structures of the inner side of the ceramic blocks; wall thickness of the ceramic blocks is relatively high, the integral bearing structure is composed of the ceramic blocks and the non-uniform tube, the inner side of the non-uniform tube is provided with a ceramic pipe as lining, and the ceramic pipe is composed of the non-conductive ceramic blocks so as to bear high pressure; so that problems of conventional non-uniform heating pipes that, strength is low and bearing of outer pressure is difficult to realize, are solved.
Description
technical field [0001] The invention relates to the field of fuel assemblies in the nuclear industry, in particular to an elongated non-uniform heating element and a processing technology thereof. Background technique [0002] Nuclear reactor fuel assembly is one of the key components of a nuclear reactor. The fuel assembly is the first barrier to prevent leakage of nuclear fuel and fission products. Its safety and advancement largely represent the safety and advancement of a nuclear reactor. After the reactor is built and put into operation, the consumption and replacement of fuel assemblies occupies a considerable part of the operating cost of the nuclear reactor. Therefore, all countries in the world attach great importance to the research and development of advanced fuel components. [0003] In the process of research and development of fuel assemblies, continuously improving the thermal-hydraulic performance of fuel assemblies is one of the important research direction...
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IPC IPC(8): G21C3/08G21C21/00
CPCG21C17/001H05B3/40Y02E30/30
Inventor 秦胜杰郎雪梅李朋洲卓文彬谢士杰刘亮
Owner NUCLEAR POWER INSTITUTE OF CHINA