It is very consistent with the gap between third-level monsters and fourth-level monsters.

And if the abundance is increased by 10% to reach 90% on this basis, it will reach the level of weapons-grade enriched uranium, which can be directly used to make nuclear bombs.

However, under normal circumstances, nuclear power plants using only low-enriched uranium fuel rods are sufficient. After all, most nuclear power plants are civilian nuclear power plants. Therefore, using low-enriched uranium is safer and cheaper.

Highly enriched uranium is generally not used in nuclear reactors to generate electricity because the concentration is too high and it would be too dangerous if leaked. In other words, the safety value is low, and it is also wasteful.

However, waste is waste, but compared to low-enriched uranium fuel rods, highly-enriched uranium fuel rods have a longer service life. The reactor itself may have aged due to use, but highly-enriched uranium fuel rods are still strong.

Therefore, modern nuclear-powered aircraft carriers and nuclear submarines that have been manufactured recently generally use highly enriched uranium fuel rods as their reactor fuel, and then permanently seal them. Highly enriched uranium can serve for life until the ship exceeds its service life because of its higher abundance.

No need to replace either.

The use of low-enriched uranium requires regular replacement, and during the replacement period, a nuclear leakage accident is very likely to occur. Therefore, although highly enriched uranium is more expensive in comparison, it is safer because it does not need to be replaced.

Moreover, there is another reason that is also very practical. The replacement of low-enriched uranium cannot be completed by naval personnel. It must be sent to a specific shipyard to be completed by professionals. The cost of this step is not low, and using highly enriched uranium can save this part of the cost.

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At the same time, it can also make the nuclear-powered ships no longer need to change their garrison locations and can stay there forever. Regular replacement of fuel rods will inevitably lead to their return to the homeland.
Chapter completed!