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Lead layer squeeze casting method for depleted fuel storage tank

A technology of spent fuel and extrusion casting, which is applied in the field of extrusion casting and hanging lead layer, can solve the problems of low efficiency, high cost, complex lead enamel process, etc., and achieve a simple process, dense thin lead layer and high bonding rate Effect

Inactive Publication Date: 2017-01-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As can be seen from this, the lead enamel technological process of prior art is complex, inefficient, and costly

Method used

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  • Lead layer squeeze casting method for depleted fuel storage tank
  • Lead layer squeeze casting method for depleted fuel storage tank

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Before hanging lead, carry out necessary pickling on the stainless steel surface of the inner and outer tanks in the gap of the shielding layer of the storage tank, preheat (70-90°C), and apply a certain amount of tin or tin-lead metal layer. exist figure 1 In the process, first pour an appropriate amount of lead liquid into the gap between the surface of the inner shell of the spent fuel storage tank and the surface of the inner shell of the outer tank, and when it cools to a semi-solid state, press down the basic lead layer with a ring-shaped punch 1 to carry out extrusion casting Hanging, so that the semi-solid liquid lead is squeezed and solidified under pressure. After the solidification is completed, a basic lead layer is simultaneously obtained on the surface of the inner shell of the storage tank and the inner shell of the outer tank. T...

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Abstract

The invention discloses a lead layer squeeze casting method for depleted fuel storage tank. The method includes the following steps: choosing a cylindrical die-casting punch for the basic lead layer to pour the lead solution for squeeze casting, and obtaining the basic lead layer after solidification; embedding the thermocouple; choosing a cylindrical die-casting punch to cement the lead layer; pouring lead solution for squeeze casting; thus the cemented lead layer can be obtained after solidification. Annular punch is used for die-casting to form a thin lead layer on both the enclosure of the stainless steel inner tank and the inner shell of the stainless steel outer tank of the shielding layer of the depleted fuel storage tank, and the lead layer and stainless steel wall can fit together closely; the lead layer squeeze casting method has the advantages of a simple process flow and high efficiency, and can apply lead automatically.

Description

technical field [0001] The invention relates to a new technique for hanging lead on the surface of a stainless steel inner tank shell and an inner shell of an outer tank during the manufacturing process of a spent fuel storage tank, in particular to a technique for extruding and casting a lead hanging layer before the lead filling process of a spent fuel storage tank. It is used in the technical field of manufacturing spent fuel storage tanks. Background technique [0002] With the vigorous development of my country's nuclear power construction, the accumulated spent fuel produced by nuclear power plants is gradually increasing, and the demand for storage tanks for its transportation and storage is gradually increasing. The lead filling process in the manufacturing process of spent fuel storage tanks is a very difficult and key technology. In addition to shielding radiation, the lead shielding layer formed after lead filling also affects the bonding rate of the lead and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02
CPCB22D18/02
Inventor 薛小怀郑天锴董昊段瑞张卫
Owner SHANGHAI JIAO TONG UNIV
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