Although the use of nuclear energy carries the risk of nuclear pollution, many countries have built nuclear power stations because of its high efficiency. The preservation of nuclear fuel is crucial in several key aspects of nuclear power plant operations. This nuclear fuel is useless once it is used, but because it is so radioactive, its indiscriminate release would be to drop another form of "nuclear bomb" on an unsuspecting outside world, posing more than a one-thirty threat. After all, the environmental impact of the fukushima nuclear power plant spill is a matter for debate. So how do you better preserve nuclear fuel? The answer is helium!

Why do scientists use helium to store nuclear fuel? The reasons are as follows:

1. Helium preservation of nuclear fuel ensures fuel integrity. Helium is an inert gas with high stability and no reactivity. The sealed steel cylinder is filled with helium to ensure the long-term integrity of the nuclear fuel sheath.

2. The preservation of nuclear fuel by helium can avoid oxidation corrosion. The sealed steel cylinder should be vacuum dried before filling with helium. Removing the water, air and air in the sealed steel cylinder can effectively prevent the fuel sheath material from deteriorating due to oxidation corrosion.

3. The sealed steel cylinder is filled with more than 99.9% high purity helium to one atmospheric pressure. After double sealing welding, the helium leakage in the sealed steel cylinder can be prevented and the outside air can be blocked from entering the sealed steel cylinder.