Everyone: Are mechanics weak? I wake up and rectify the natural disaster

Chapter 15 There is a mushroom falling from the sky

Mushrooms...are a good thing!

Mushrooms growing on the ground are not dead after eating them.

At most one person can lie down on the couch while the whole village waits for the banquet to begin.

Mushrooms falling from the sky are a big problem.

Most of the people in Hiroshima have to sleep on a bed.

The difficulty in manufacturing nuclear bombs lies in raw materials.

Of course, the raw material mentioned here is not ordinary uranium.

Uranium is divided into depleted uranium and enriched uranium.

Depleted uranium is uranium-238, a uranium isotope not suitable for participating in fission reactions.

Depleted uranium has a large number of applications in tank armor and armor-piercing projectiles.

It can be seen that this thing is not actually scarce.

What is truly scarce is uranium-235.

Its proportion in natural uranium ore is less than 0.7%.

How to extract the usable isotope uranium-238 from uranium-235, which accounts for more than %, is the key difficulty in manufacturing nuclear weapons.

The two uranium isotopes are almost identical, with the only difference between them being less than one percent of atomic mass.

The core problem in making enriched uranium is how to use this negligible mass difference to separate them.

Midea spent a full $2.5 billion on the Manhattan Project.

The project team using the electromagnetic separation method alone used more than 14,000 tons of silver extracted from the U.S. Treasury Department to build magnetic field coils.

And this is just one of four extraction methods.

Four methods were launched at the same time, and with the supporting manpower and material resources, a total of 2.5 billion knives were sprayed.

You know, that was 2.5 billion dollars in the 1940s, still in the gold standard era.

Calculated based on the current rate of water release by the Federal Reserve, it is not an exaggeration to say that it is equivalent to the current $2.5 trillion.

Su Wen felt numb just thinking about it.

This kind of work is about playing with national power.

Or be like the United States and be willing to throw thousands of real money and silver into it to build tens of thousands of centrifuges;

Either like Lao Zhong, who can mobilize millions of manpower to complete the preliminary purification by hammering, grinding and 'hand-making uranium yellow cake';

Otherwise don’t even think about it.

but...

Another premise is that the technology has not iterated.

With cutting-edge technology, this is not a problem.

The nuclear fuel extraction technology before the catastrophe was already very advanced, and the consumption of manpower and material resources was far less exaggerated than during the Cold War.

But in front of the nanoforge, that's not enough.

"With our existing technology and equipment,"

"Approximately how much enriched uranium is needed to make a nuclear warhead with a yield of 100,000 tons?"

Su Wen asked.

[At least five kilograms. 】

The system's electronic voice said calmly.

"Five kilograms..."

Refining one kilogram of weapons-grade enriched uranium requires roughly two hundred tons of uranium ore.

Su Wen's teeth were a bit sore.

He doesn't have uranium ore.

The uranium mines in China are far away in the northwest, so you have to go to Little Sun's house to find them, both of which are out of his reach.

Can only rely on filtering sea water.

Indeed, uranium can be obtained by filtering seawater.

Seawater not only contains uranium, but also tritium and deuterium.

The problem is that with the extremely rare concentration, extracting them is a long-term and large-scale super project.

Not to mention anything else, if the daily throughput of the water extraction plant alone is less than one million cubic meters, the uranium harvested every day may not be enough to fill a water glass.

"This is a long-term project!"

Su Wen looked confused.

Not only is it long-term, the investment is also huge.

Otherwise, it would not be the case that only a few countries had nuclear weapons before the catastrophe.

If he deployed a tidal screen on the beach and could accumulate enough enriched uranium for a nuclear bomb in half a year, that would be great.

Even if Little Sun had uranium mines back then, it still had to hold on to them for decades.

The same is true if tritium and deuterium are extracted.

Preparing heavy water requires frequent electrolysis, and large-scale electrolysis of water also requires a large amount of electricity.

[This is also the reason why this machine recommends that the host choose helium-3 fusion in one step. Compared with producing uranium, tritium and deuterium from seawater, refining lunar soil to produce helium-3 is much less difficult, and the workload is not that heavy. 】

[Whether it is used for power generation or weapons purposes, helium fusion has more advantages than traditional heavy nuclear fission. 】

The system said.

"I understand...but I still have to get this project started. It doesn't matter if it doesn't work in a short time. I can wait."

Su Wen nodded regretfully.

If you can’t come up with a complete investment in a short period of time, and you’re reluctant to give up, you have no choice but to wait.

Using tidal screens to obtain nuclear fuel is a long-term project that depends on time.

But seabed mining was something he should start preparing for immediately.

Since he did not mention the technology of the 'Undersea Ideal City', t3's 'Earth Core Drilling' cannot be deployed on the seabed.

Therefore, at this stage, Suwen will use t2's 'automatic submersible boring machine' and 'pipe recovery system' to cooperate in completing seabed mining operations.

These are all pre-technologies before unlocking the T3 advanced mining complex, with lower technical difficulty and lower material requirements.

But relatively speaking, the collection speed is not as good as that of giant buildings like the 'Earth Core Drilling'.

As for the specific deployment location...

"The 'Rocky Coast' is very good, but we have to wait until we carefully examine it in the secret realm before we can decide where is the best place to station."

Su Wen looked at the maps and detailed explanations of all the first and second level secret realms and had some thoughts in his mind.

"Let's go home first. Things are over here in Shangjing, and it's time to go back."

Jiangbei Base City.

Su Wen went to Shangjing for a week this time.

When I came back, this graduation season was considered over.

A dozen colleges and universities in Jiangbei Base City have basically completed the awakening test for qualified students.

A large number of recent professionals have poured into society, injecting new blood into the group of pioneers who are exploring secret realms and resisting the demonic tide.

These are thousands of professionals. Their arrival symbolizes that today’s China still has the ability to continuously make blood, allowing ordinary people even if they have not awakened their talents and switched to other jobs to contribute to society. Be able to regain your confidence.

I believe that as long as we maintain this momentum, persevere, continue to build blood, and continue to grow in strength, we will eventually be able to survive this end of the world.

During the graduation season every year, the base city is full of singing and dancing, and the atmosphere is cheerful, which is almost the same as the Spring Festival.

He symbolically carried a bag and stepped out of the teleportation hall.

Su Wen went against the crowd, looking at the young faces chatting, laughing, or having heated discussions, passing by him and entering the teleportation hall behind him.

Su Wen felt that even he was infected by the youthful atmosphere on their bodies, and his steps became brisk.

He had experienced so many things this week that he almost forgot who his original identity was.

He almost didn't realize that he was actually a young man in the same class as these guys.

"The mentality, the mentality changes so fast."

He couldn't help but shook his head mockingly.

makes sense.

Other peers are still following behind the seniors, copying homework and learning strategies, nervously experiencing the first battle in the secret realm, and still slowly growing from newbies to maturity;

Su Wen had already bloodbathed several secret realms, and his kill count exceeded 100,000.

The weird things in the secret realm that his peers had to rack their brains to deal with were just a drop in the ocean that he casually pushed into the secret realm.

Under such circumstances, it is indeed difficult for him to establish empathy with his peers.

In particular, Su Wen himself is a time traveler from two lifetimes.

I have an old mentality, and I feel a little sad when I see young people.

With some emotion.

Su Wen stepped onto the stairs of Tongzilou again and returned to the rental house where he had not left for a long time.

At this point, Jiang Chirui was still at work and there was no one at home.

After walking around for a while, I went to look next door again.

Judging from the traces of his life, that funny guy probably hasn't fooled himself to death yet.

Su Wen breathed a sigh of relief.

but.

Before he could put down his luggage, a phone call came in.

"Meeting? What kind of meeting?"