Pressurization of fuel rods by laser drilling and sealing专利检索-核燃料棒燃料组件堆芯核反应堆核能电厂发电厂分销网络和设备专利检索查询-专利查询网

Pressurization of fuel rods by laser drilling and sealing

阅读：58发布：2022-01-25

专利汇可以提供Pressurization of fuel rods by laser drilling and sealing专利检索，专利查询，专利分析的服务。并且A method of pressurizing a presealed fuel rod containing nuclear fuel with an inert gas under pressure. A loaded fuel rod is inserted into a pressure chamber, the latter is sealed and a vacuum is applied. While maintaining the vacuum in the chamber, the fuel rod is punctured with a fine hole by means of a laser beam. The air inside the vessel is drawn out into the chamber until it reaches equilibrium therein. The chamber is then filled with an inert gas under pressure and this gas is forced inside the fuel rod through the aforesaid hole. When the pressure inside the fuel rod reaches equilibrium with the chamber, the hole is sealed by means of a laser beam and the fuel rod is removed from the chamber.，下面是Pressurization of fuel rods by laser drilling and sealing专利的具体信息内容。

权利要求

1. A sequential method of pressurizing a sealed fuel rod of the loaded nuclear variety in step wise order, Comprising:

1. Positioning a sealed fuel rod having a nuclear fuel therein in a predetermined location in a closed chamber.

2. Evacuating said chamber to provide a vacuum,

2. The method of claim 1, wherein in step 3 said light energy is between about 13,000 and 110,000 joules per square centimeter.

3. The method of claim 1, wherein in step 3 about 52,360 joules per square centimeter is applied to said rod of the Zircaloy variety.

3. Applying between about 160 and 740,000 joules of light energy of the laser variety per square centimeter to a desired location on the surface of said rod to produce a puncture which communicates with the interior of the same, purging said fuel rod through said puncture,

4. Pressurizing said chamber to a pressure above atmospheric pressure, and

4. The method of claim 1, wherein between steps 3 and 4 said chamber is evacuated to 20 u and allowed to reach equilibrium prior to pressurization of said chamber.

5. The method of claim 1, wherein communication of said puncture with the interior of said rod as a result of step 3 further comprises the step of observing a reduction of the vacuum produced in said chamber by step 2.

5. Reapplying said light energy to an enlarged area around the periphery of said puncture to seal the same.

6. The method of claim 1, wherein in step 4 said chamber is pressurized to 400 pounds per square inch prior to sealing said puncture.

7. The method of claim 1, wherein in a final step, said chamber is again evacuated after the sealing of said puncture in step 5.

说明书全文

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Pressurization of fuel rods by laser drilling and sealing

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