High temperature batch sintering device for mox pellet preparation

Abstract

The invention belongs to the technical field of MOX pellet sintering and particularly relates to a high-temperature batch sintering device for manufacturing MOX pellets. The outer wall of a furnace body is fixed to the rear wall of the interior of a glove box; the furnace body is provided with furnace body corundum refractory bricks, zirconium oxide insulating bricks, a water cooling induction coil and a furnace body outer wall from inside to outside, and the water cooling induction coil winds the outer walls of the zirconium oxide insulating bricks; a molybdenum cover plate is installed overthe corundum refractory bricks and the zirconium oxide insulating bricks; a furnace cover is arranged over the furnace body and connected with the furnace body outer wall, a furnace bottom is arrangedunder the furnace body, and the two end of the furnace bottom are provided with two air cylinder locks; a furnace bottom cover is located under the furnace body, the furnace bottom is connected withthe furnace bottom cover through a screw rod, and furnace bottom corundum refractory bricks, a tungsten barrel and a molybdenum boat are sequentially placed on the furnace bottom cover from top to bottom; a thermocouple sequentially penetrates through the molybdenum boat, the tungsten barrel and the furnace bottom corundum refractory bricks to be installed on the furnace bottom cover; and the lower portion of the furnace bottom cover is provided with a mixed hydrogen and argon gas feeding and exhausting opening. According to the high-temperature batch sintering device, high-temperature sintering of the MOX pellets is achieved, and the problem that the thermal field is uneven in the sintering process is solved.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel pellet sintering, and in particular relates to a high-temperature batch sintering device for preparing MOX pellets. Background technique [0002] The MOX fuel plant is the intermediate link between the reprocessing plant and the pressurized water reactor and fast reactor, and is the key link to realize the closed cycle of nuclear fuel in my country. High-temperature sintering is the key process for turning MOX green bodies into MOX pellets. The selection of high-temperature sintering furnace directly affects the sintering quality of MOX pellets. Due to the late development of MOX in China, the development experience of MOX high-temperature sintering furnace is insufficient, and this equipment is restricted to export abroad. The vertical batch sintering furnace used in the domestic MOX experimental line needs to be enclosed in a glove box due to the high radioactivity in the production proces...

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Problems solved by technology

Due to the late development of MOX in China, the development experience of MOX high-temperature sintering furnace is insufficient, and this equipment belongs to foreign restricted export equipment

The vertical batch sintering furnace used in the domestic MOX experimental line needs to be enclosed in a glove box due to the high radioactivity in the production process, but the structure of the batch sintering furnace is complex, which makes maintenance extremely inconvenient. It is difficult to realize the maintenance or replacement of parts

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