High temperature tube type atmosphere furnace for preparing eight oxidation three uranium reference materials

Abstract

The invention belongs to the technical field of nuclear fuel elements, and particularly relates to a high temperature tube type atmosphere furnace for preparing eight oxidation three uranium reference materials. The high temperature tube type atmosphere furnace for preparing eight oxidation three uranium reference materials comprises a furnace body conjunction piece, a lower hearth, an upper hearth, an upper cover, quartz glass tubes, lock catches, universal wheels A, universal wheels B, a control panel, a liquid collector, and quartz boats; the lower hearth and the upper hearth compose a hearth, the inner wall of the hearth is made of the quartz glass tubes, and the quartz boats are arranged in the quartz glass tubes; the furnace body is mounted with an inclination angle of 5 degree centigrade in the horizontal direction, and the liquid collector is arranged at one end of the lower portion of the furnace body; and the furnace body conjunction piece is arranged below the furnace body, the furnace body conjunction piece is a furnace body frame which is welded together by carbon steel plates, the upper cover is arranged above the furnace body, the lower hearth and the upper hearth are locked through the lock catches, the universal wheels A and the universal wheels B are correspondingly arranged on both ends of the lower portion of the furnace body conjunction piece, and the control panel is arranged on one side of the furnace body conjunction piece. The high temperature tube type atmosphere furnace for preparing eight oxidation three uranium reference materials can overcome the shortcomings of the prior art.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel elements, and in particular relates to a high-temperature tubular atmosphere furnace for preparing standard substances of U3O8. Background technique [0002] Nuclear fuel elements are the core of nuclear power plant reactors, and uranium dioxide for the production of nuclear fuel elements is an important part of nuclear fuel elements. The content of impurity elements in uranium dioxide is directly related to the quality of nuclear fuel elements, and it is necessary to strictly control the content of impurity elements in uranium dioxide . U3O8 is one of the most important uranium oxides, and it is also the most stable uranium oxide, because uranium dioxide, uranium hexafluoride and uranium tetrafluoride are unstable in the air, and the standard substance of U3O8 is generally used In the 1980s, our country adopted the synthetic matrix method to distill, crystallize, dry, decompose, calcinate, ...

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Problems solved by technology

[0004] The high-temperature tube furnace developed in the prior art has problems with the material of the furnace during use, the introduction of impurity pollution, the small size of the furnace and the low amount of standard material prepared at one time (tens of grams), the exhaust gas and waste liquid generated during the calcination process and the Furnace airtightness problem, because it is impossible to distill, crystallize, dry, decompose, and calcine the high-concentration uranium-containing solution in the tube furnace, and prepare U3O8 products in one step, which is easy to introduce impurity pollution, and the process is difficult to control and easy cause material loss

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