Method and device for improving tritium value-added rate of fusion reactor

Abstract

The invention discloses a method and device for improving the tritium value-added rate of a fusion reactor. The method comprises the following steps: acquiring a fusion reactor divertor geometric configuration, a vacuum chamber and cladding interface, a divertor teleoperation maintenance strategy, a divertor material route map and divertor load input; determining a divertor basic structure model; wherein the divertor basic structure model weakens the neutron shielding capability of the divertor on the premise that components meet the structural strength, and a target plate component structure model is determined; determining a hybrid divertor cladding final structure model, wherein a shielding block mounted between the divertor and the vacuum chamber is canceled; and determining the tritium value-added rate increasing quantity. The device comprises a bottom cladding, an outer target plate component, a Dome component and an inner target plate component, and the outer target plate component, the Dome component and the inner target plate component are directly connected with the bottom cladding. According to the invention, the tritium production area of the cladding is expanded, and the tritium increment rate of at least 0.04 can be expected to be improved through numerical simulation evaluation, so that the influence of a heating and diagnosis system on cladding opening can be made up.

Description

technical field [0001] The invention relates to the field of nuclear fusion, in particular to a method and device for increasing the value-added rate of tritium in a fusion reactor. Background technique [0002] Tritium self-sustainability is one of the necessary conditions for the commercial operation of future fusion reactors. CFETR (China Fusion Engineering Experimental Reactor) through the research and development of tritium breeding technology, makes the fusion reactor meet the tritium self-sustaining condition, that is, the tritium value increase rate is greater than 1. The fusion reactor produces tritium through the cladding. For the CFETR cladding, due to the loss in the tritium extraction process, the cladding components should meet the tritium value increase rate greater than 1.1. There are two schemes of helium cooling and water cooling in the design of CFETR cladding. Evaluation results of the current engineering design plan: 1) The value-added rate of tritium...

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Problems solved by technology

[0003] The inventors have found that at least the following problems exist in the existing CFETR design scheme: the value-added rate of tritium in the cladding is only slightly higher than the requirements of the component itself, but it is very difficult to increase the value-added rate of tritium by changing the structure of the existing cladding; the lower part of the divertor The space generally needs to install shielding blocks to make up for the lack of neutron shielding ability of the divertor itself, and the precious space at the bottom is not effectively utilized

In the past, people did not consider the method of installing cladding at the bottom of the divertor to increase the tritium value-added rate. The main reason is that the neutron wall load in the divertor area is relatively low. One of the functions of the divertor design is to shield neutrons, that is, neutrons After being shielded by the divertor, the magnets and other components at the rear of the divertor meet the requirement that the nuclear heat index is lower than a certain limit, so the existing design schemes use the cladding at the bottom of the divertor to have a very limited effect.

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