Method of manufacturing uranium target to be soluble in basic solution and method of extracting radioactive Mo-99 using the same

Patent metadata

Field	Value
Publication number	US-11713498-B2
Application number	US-202016773779-A
Country	US
Kind code	B2
Filing date	Jan 27, 2020
Priority date	May 22, 2019
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

Disclosed are a method of manufacturing a uranium target, the method including (a) a step of preparing a conjugate including a matrix and a uranium target green compact formed in the matrix; and (b) a step of performing thermo-mechanical treatment through additional heat treatment at 530° C. to 600° C. during a hot rolling pass in a process of hot-rolling the conjugate, and a method of extracting radioactive Mo-99 using the uranium target.

First claim

What is claimed is:

1. A method of manufacturing a uranium target, the method comprising:
manufacturing a uranium green compact by mixing and compacting a uranium-aluminum alloy powder and an aluminum powder, where the content of aluminum in the uranium-aluminum alloy powder is 20% by weight or less;
preparing a conjugate by combining an aluminum matrix and the uranium green compact; and
performing a process of hot-rolling the conjugate comprising hot roll passes at a temperature of 530° C. to 600° C. for 7 to 20 hours.

2. The method according to claim 1 , wherein the uranium target is soluble in a basic solution.

3. The method according to claim 1 , wherein a content of U-235 in the uranium target is 20% by weight or less.

4. The method according to claim 1 , wherein the uranium target has a density of 3.0 gU/cm 3 to 10.0 gU/cm 3 .

5. The method according to claim 1 , wherein a content of the uranium-aluminum alloy powder in a total of the uranium-aluminum alloy powder and the aluminum powder is 10% by volume to 50% by volume.

6. The method according to claim 1 , wherein, in the performing, a surface temperature of a hot roll is 80° C. to 100° C.

7. The method according to claim 1 , wherein the process of hot-rolling the conjugate is performed to change a U or UAl 2 phase in the conjugate to a UAl 3 or UAl 4 phase.

8. A method of extracting radioactive Mo-99, the method comprising:
manufacturing a uranium target according to the method of claim 1 , and then dissolving the uranium target in a basic solution; and
extracting radioactive Mo-99 from the basic solution containing the uranium target dissolved therein.

Assignees

• Korea Atomic Energy Res

Inventors

• Kim Ki Nam
• Park Sung Chan
• Jeong Yong Jin
• Lee Kyu Hong
• Kim Sung Hwan
• Cho Tae Won
• Park Jong Man

Classifications

• C22C43/00 Primary

  Alloys containing radioactive materials · CPC title

• B22F3/02

  Compacting only · CPC title

• B22F3/18

  by using pressure rollers · CPC title

• B22F3/24

  After-treatment of workpieces or articles {(B22F3/1146 takes precedence)} · CPC title

• C22B60/0252

  treatment or purification of solutions or of liquors or of slurries (C22B60/0221 takes precedence) · CPC title