Chapter 651 The Atomic Bomb Enters the Production Stage! (Part 1)

Just as Zhu Guangya expected.

The appearance of the domestically produced gas exchange membrane made the entire conference room fall into an ecstatic atmosphere.

Not to mention ordinary experts, even bigwigs like Lao Guo and Qian Wushi couldn't help but wave their fists a few times.

After all,

the gas exchange membrane involves the refining of enriched uranium.

In a sense.

The importance of enriched uranium is at the same level as the theoretical design of the atomic bomb, which is similar to the nonlinear neutron transport equation.

In the future when Xu Yun traveled through time.

Even if the relevant restrictive treaties on nuclear testing and the amount of uranium mines are not considered, many countries are still unable to refine enriched uranium with an enrichment of more than 90%.

Of course.

The above sentence refers to the refining that relies entirely on its own industrial level, and the situation of calling for imported equipment is not included.

In short.

The news of the domestically produced gas exchange membrane has injected a shot of adrenaline into today's group meeting, and it has made a good start.

After a while.

An old expert with gray hair and a circle of tape wrapped around the bottom of his glasses raised his hand:

"Comrade Chengzong, is the expected progress or the actual progress that you said you can refine about 10 kilograms of enriched uranium by the end of the year?"

Yang Chengzong was slightly startled, but soon understood what the old expert wanted to express:

This is asking about the mass production of gas exchange membranes.

After all, in addition to centrifuges, the number of gas exchange membranes is also a key factor in refining enriched uranium.

According to Yang Chengzong.

This kind of gas exchange membrane requires a relatively high cost to produce, so its production capacity is an issue that must be paid attention to.

Fortunately, Yang Chengzong was not unfamiliar with the relevant data of gas diffusion membranes, so he quickly adjusted his state:

"Comrade, your question is very valuable and critical."

"But you can rest assured. Under the coordination of the organization, we have contacted the comrades of the Magic City Naval Research Institute."

"The Naval Research Institute will use ship-level equipment to assist us in the production of gas exchange membranes. The current weekly output is about 2,000 sheets."

"And the equipment loss required to produce ten kilograms of enriched uranium by the end of the year. Well, converted into weekly values, it is about 1,400 sheets."

"So the current production capacity of gas exchange membranes alone can easily afford the refining of enriched uranium. At the same time, we have made a long-term plan with the comrades of the Magic Sea. In three months, the production capacity of gas exchange membranes can be expanded to more than 3,000 sheets."

Hearing the six words of the Magic City Naval Research Institute.

Before the old expert who spoke up said anything, Xu Yun's face showed a hint of obvious surprise.

Huh.

It turned out to be them?

This is an old acquaintance

Students with good memory should remember it.

In the real world that Xu Yun traveled through, Huadun Biotech once encountered an equipment crisis:

Nutrien refused to provide Huadun Biotech with the FOERDA-T632 series production line and included it in the embargo list of the Wassenaar Arrangement.

That production line is the core production equipment of "One Rooster Killer". Without it, the entire product cannot be produced at all.

So Xu Yun went to Yongcheng in person and found Lin Zhenhua, the factory director of Hanhua Group, and took Lao Su to visit his grave.

In the end, Lin Zhenhua contacted a naval unit and used the naval production equipment to create a module.

And that naval unit happened to be.

The Naval Research Institute of Magic City.

The result was unexpected.

In this copy, Xu Yun unexpectedly heard their names again.

But this is normal.

The accuracy of gas exchange membranes is basically around micron level. Now it is impossible for any ordinary state-owned enterprise in China to do it. The target can only be the military industry.

And due to the current situation.

At present, the military enterprises in the inland are either undertaking the production of various weapons or are in the process of relocation for the three-line depth strategy, and it is basically impossible to spare too many manpower and equipment.

So naturally.

This production task fell into the hands of the navy.

The Magic City Naval Research Institute is now the top naval research unit in the country, responsible for the research of various ships and even submarines.

So it is inevitable that the gas exchange membrane will be produced by them in some sense.

"More than 2,000 sheets per week?"

The old expert repeated the number reported by Yang Chengzong, calculated it quickly in his mind, and finally nodded with satisfaction:

"This is indeed enough."

The name of this old expert is Yang Wei, who was originally an engineer in charge of uranium enrichment related projects in the Institute of Atomic Energy.

It was just that two years ago, the bearing center of the base experimental group lacked experts, so Yang Wei was transferred to the 221 base.

However, the change of position did not affect Yang Wei's professional quality.

After a few simple mental calculations,

He roughly judged that the number given by Yang Chengzong could indeed afford the expected enriched uranium purification, and even have a surplus.

And as Yang Wei spoke.

The matter of gas exchange membrane was temporarily concluded.

Yang Chengzong and Qian Gaoyun quickly sat back in their seats, and the right to speak was once again handed over to Zhu Guangya.

"Ahem."

Zhu Guangya quickly cleared his throat and said to the audience:

"Comrades, thank Comrade Yang Chengzong for the introduction."

"With the breakthrough in gas exchange membrane technology, we are now one step closer to the successful production of atomic bombs."

"But there is an old saying in China, which goes, "A journey of a hundred miles begins with a single step."

"It means that walking ninety miles out of a hundred miles is only halfway done. It means that the closer you are to success, the more difficult it is, and the more seriously you should take it."

I don't know why.

When explaining the meaning of this sentence, Zhu Guangya glanced at Li Jue.

Li Jue:

"."

Then Zhu Guangya paused and continued:

"And this sentence is applied to our atomic bomb project, which is related to the production of parts on the application side."

"The theoretical group led by Comrade Lu Guangda has completed the first ninety miles, and the remaining ten miles need to be completed by our comrades in the experimental group."

"So our meeting today is called the baton handover group meeting. First, it is a formal handover, and second, it is to assign specific R&D tasks."

After that.

Zhu Guangya winked at Lu Guangda in the audience.

Seeing this, Lu Guangda stood up and came to Zhu Guangya with a rolled-up cylindrical blueprint.

Zhu Guangya then stepped aside to help Lu Guangda spread out the blueprint, and then fixed it on a pre-prepared iron plate with four magnets.

After fixing it.

"Comrades."

Zhu Guangya picked up a bamboo pole about 30 centimeters long, pointed at the blueprint and said:

"Comrades, as you can see, this is the specific structure of the atomic bomb."

"Its structure from the inside to the outside is the ignition neutron source, which is specifically divided into the outer shell and the inner liner, followed by the nuclear charge uranium 235, and then"

Zhu Guangya had seen the structure of the atomic bomb many times before the meeting, so he was very fluent when introducing it.

Following Zhu Guangya's introduction, many experts on the scene quickly understood several core links:

Beryllium/Polonium neutron source,

Honeycomb cardboard partition - that is, the air barrier, provides space for the critical collapse of the compressed uranium fuel after the detonation.

U235 fuel layer ball fragments,

Polonium protective layer,

Explosive detonation drive mechanism, also known as plane wave generator.

Finally, there is the free neutron generating layer and the neutron reflecting layer.

"First, let's discuss the ignition neutron source."

Zhu Guangya pointed the bamboo pole to the center of the atomic bomb again:

"The neutron source plus the injection device is our preset ignition neutron source, also known as the nuclear trigger."

"The comrades in the theoretical department have already given a detailed plan for the specific principle of this part, that is, to wrap the radium or polonium powder and beryllium powder separately with gold foil, and then put them into the atomic bomb.

"At the beginning, the alpha particles emitted by radium or polonium will be blocked by the gold foil. When the explosion occurs, the gold foil will be crushed, and the radium/polonium powder will come into direct contact with the beryllium powder. Beryllium will absorb alpha particles and emit neutrons. "

"As for the relevant characteristics of neutrons, the tandem accelerator is still under study. The initial time is the end of November this year, and more detailed results will be available in January or February next year. "

It is well known.

U235+neutron=barium 138+krypton 95+3 neutrons

So strictly speaking.

When enough mass of uranium 235 is put together, the neutrons produced by decay are enough to trigger a chain reaction.

For example, a simple gun-type detonation is to use two pieces of uranium below the critical mass to store them separately inside the atomic bomb.

When detonation is needed.

Push one piece of uranium to another piece of uranium with explosives to exceed the critical mass. The neutrons released by the decay of the two pieces of uranium are enough to cause a chain reaction and trigger the explosion of the atomic bomb.

But this detonation method There is some uncertainty in the formula, so the first neutron that starts most atomic bombs comes from a neutron source.

Just like the graphics cards of later generations can be divided into flagship and beggar versions.

Neutron sources can also be divided into flagship and beggar versions according to changes in actual conditions.

The flagship version is represented by the spallation neutron source of later generations, which only four countries in the world have.

Among them, the rabbits are called CSNS, which has invested more than 2 billion yuan and is located in the legendary city of Dongguan in Guangdong Province.

CSNS also cooperates with the British spallation neutron source ISIS, the spallation neutron source across the sea SNS and the neon It is listed as one of the four major spallation neutron sources in the world together with the J-PARC spallation neutron source.

Of course.

It should not be difficult to guess from the above promotional template that our CSNS can only rank fourth among the four.

This is the unspoken rule of publicity and promotion.

As for the beggar version,

it is much simpler.

Just like if you add three numbers and two letters at random, there is a probability that you will find some mysterious website.

α radioactive nuclide + beryllium is one of the typical formulas of the beggar version neutron source.

For example, the combination of polonium and beryllium, radium and beryllium, etc.

These substances are put together Neutrons can be produced from this method. Some nuclear reactors in later generations use this method, which is good value for money.

However, the plan is the plan, and the specific structure of the neutron source is definitely not as simple as Zhu Guangya said, that is, using gold foil or only using gold foil.

"."

Zhu Guangya then left some time for the experts on the scene to think, and then cast his eyes on a thin middle-aged man nearby:

"Comrade Wang Fangding, your team is equipped with the only helium mass spectrometer leak detector in the base, and you have also been responsible for the research of the 9501 project before, and you are experienced in this area."

"So now the organization wants to give this task to you. I wonder if you have the confidence to complete it?"

Swish——

Hearing Zhu Guangya's words.

The middle-aged man named Wang Fangding immediately stood up from his seat and straightened his back in a very serious manner:

"No problem! Director Zhu, I promise to complete the task!"

Xu Yun looked up at the middle-aged man who was a little smart, and suddenly a trace of emotion emerged in his heart.

Wang Fangding's father was Wang Daozhou, a famous Chinese expert in gunpowder and internal ballistics. Wang Fangding started dealing with gunpowder when he was five years old, and later became a well-known nuclear chemist in China.

Even in the original history, he was the developer of the neutron source for the first atomic bomb detonation in China.

However, in the original history, he had always worked in the atomic energy institute in the capital, and would not be transferred to the 221 base until three years later.

But before that, with the launch of the [Taishang] project, Wang Fangding arrived at the base with a new batch of members not long ago.

However, Xu Yun was not impressed by Wang Fangding's resume, but

When Wang was critically ill, he met Wang Fangding, who had the same surname as Wang, in the senior officials' building of Yanjing Hospital.

At that time, Wang Fangding, the old man, was still in good health.

A 95-year-old man looks like he is only in his early 80s, and he doesn't even need help from others when walking normally.

Now that he saw the young Wang Fangding in the copy, Xu Yun couldn't help but feel the same emotion as when he met Wang Yaoping before.

Zhu Guangya seemed very satisfied with Wang Fangding's reaction. He turned his head and looked at Qian Bingqiong:

"Comrade Bingqiong, look."

Qian Bingqiong nodded, walked to Wang Fangding with a small box, and carefully took out several small bottles from it:

"Comrade Fangding, this is the barium carbonate radium salt I brought back from France. I have been reluctant to use it for so many years. Now it is used in the most needed place."

"Barium carbonate radium salt?"

Wang Fangding was slightly startled when he heard it, and his breathing immediately became rapid.

He took the bottles in Qian Bingqiong's hands with both hands, looked at them carefully for a few times, and then looked at Qian Bingqiong:

"Director Qian, these barium carbonate radium salts are..."

Qian Bingqiong turned his head and looked at Yang Chengzong, with a trace of reminiscence in his eyes:

"This is the gift my teacher gave me that year, the same as what Chengzong brought back that year, both 10 grams."

When it comes to the history of China's nuclear industry, many people must think of Qian Bingqiong first.

But in fact,

Before Qian Bingqiong, there were two people who had an extremely important but indirect impact on China's nuclear industry.

These two people are Academician Yan Jici and Joliot-Curie, the eldest daughter of Marie Curie.

Yan Jici went to Gaul to study in 1923 and entered Professor Fabry's laboratory and the Radium Institute headed by Marie Curie.

In four years, Yan Jici and Marie Curie forged a very deep friendship.

After Marie Curie passed away.

Yan Jici maintained long-term contact with Marie Curie's daughter and Joliot-Curie.

Later, with this relationship, Yan Jici was able to recommend Qian Bingqiong and Yang Chengzong to Joliot-Curie's institute.

Qian Bingqiong and Yang Chengzong received extremely sufficient knowledge education under Joliot-Curie, and this knowledge later basically evolved into the theoretical foundation of China's nuclear industry.

At the same time, before leaving Gaul.

Joliot-Curie also gave Qian Bingqiong and Yang Chengzong 10 grams of barium carbonate radium salt respectively.

The only difference is.

Qian Bingqiong's barium carbonate radium salt was given by Joliot-Curie on his own initiative, and it was a very pure gift between teacher and student.

Yang Chengzong's barium carbonate radium salt was given to him for free by Joliot-Curie after Qian Bingqiong expressed his willingness to buy it in his letter.

After these two barium carbonate radium salts came to China, they played an extremely important role in the research of Chinese nuclear physics.

Yang Chengzong's barium carbonate radium salt became the "heart" of the equipment during the repair process of the radon extraction device that Yang Chengzong took out from Union Hospital eight years ago at the cost of blindness.

Since then, the rabbits have been able to measure the relevant fixed value data such as the appropriate energy band of radium, and can extract a small amount of alpha radioactive nuclides.

Qian Bingqiong's barium carbonate radium salt became the material for the neutron source of the rabbits' first atomic bomb.

However, this time is not a year ago as many marketing accounts say, but September two years later-the calcium oxide crucible will not be made until next year. I don't know why even The Paper reported that it was last year.

The view returns to reality.

After looking at the barium carbonate radium salt, Wang Fangding carefully put them back into the iron box.

But this time, he did not express any determination.

Actions are more meaningful and valuable than words.

On the other side.

Zhu Guangya also retracted his gaze and turned to look at the scene again:

"Since Comrade Wang Fangding is responsible for the development of the neutron source, is there any comrade who would like to volunteer for the next honeycomb cardboard partition?"

As soon as Zhu Guangya finished speaking.

A bald man stood up in the crowd:

"I'll do it!"