"Hey, why are there so many people here?" When Qin Tao returned to the third design office, he was surprised to find that there were more people.

Among them, the fat old man with white hair looked so familiar. He thought for a moment, and then asked tentatively: "Mr. Zhao?"

Hearing his name being called out by Qin Tao, Mr. Zhao showed a smile on his face: "They say Mr. Qin is well-informed, and now he finally understands it. The first time we met, he was recognized. Mr. Qin,

Just call me Lao Zhao from now on."

Of course Qin Tao couldn't agree. The old man in front of him was the person in charge of the nuclear reactor of the first-generation domestically produced nuclear submarine!

At that time, the country was very poor and had no commercial nuclear power plants. Nuclear reactors were just getting started. At this time, it was very difficult to develop an advanced nuclear submarine power system.

However, no matter what difficulties there are, nothing can stop the domestic scientific and technological personnel. They persist in working under harsh conditions, even during the third-line construction. They have been away for twenty years. This is how the first-generation nuclear submarine of the motherland was destroyed.

from.

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Moreover, relying on solid skills, the motherland's nuclear submarines have not had any serious accidents. The nuclear reactor on land was successfully started once and then operated at full power. Years of hard work have yielded success.

However, compared with other submarines in the world, the nuclear reactors of domestic submarines are still very backward, noisy and low in power. Therefore, domestic scientific and technological personnel are also overcoming obstacles and constantly forging ahead to develop more advanced nuclear reactors.

The first-generation nuclear reactor only had a power of 10 megawatts. After their efforts, the power was increased to 28 megawatts. It can be said that there has been rapid development.

However, if compared with Lao Maozi's VM-5 nuclear reactor, it is not worth mentioning. Their nuclear reactor can output 170 megawatts of power!

In the past, although they had heard of it, they had never seen it. Although they had attended many academic conferences together, Krasnopolski had never disclosed Lao Maozi's most advanced submarine nuclear reactor technology.

Until now, these old fools have decided to stay and design a brand new nuclear submarine, so this nuclear reactor technology has been developed.

After the report was given, countless people were shocked, and Mr. Zhao even personally brought people over.

"Mr. Zhao, when you come this time, do you plan to just come and take a look, or do you plan to stay and help? Our Mingzhou Group's guest house can still accommodate everyone. If you can stay and work here, I will very much welcome it."

Hearing Qin Tao's words, Mr. Zhao nodded: "Since Mr. Qin is so enthusiastic about staying, then we will stay. You will be responsible for food and accommodation, and we will work for free."

These people are all working in relevant domestic departments. They have a salary provided by the state. Moreover, they don't care about how much money they make, but they care more about their achievements at work.

On the surface, I am staying to help, but in fact, I am staying to learn!

What is the structure and principle of this kind of nuclear reactor that is more than ten times more powerful than our own? How to ensure safety, etc. These are all things that they need to study and master during their studies.

Seeing Mr. Zhao nodding, Qin Tao was very satisfied: "Okay, then you can go to work, Krasnopolsky! The new force is here! Our nuclear reactor research and development progress can be accelerated!"

Of course, Krasnopolski would not object to the joining of these people. Even with the help of computers, he would still need a large number of manpower. Most of the people in front of him have met before and met during previous meetings.

He is engaged in nuclear reactors, and he is very happy to accept the arrival of these people.

"Mr. Krasnopolsky, I don't understand the design of the operating system of this control rod." Soon, Mr. Zhao raised a question.

Nuclear reactors sound very sophisticated, but in fact the principle is very simple.

In order to facilitate use in submarines, most of them are graphite reactors, which use graphite blocks as the main body of the reactor. There are cylindrical horizontal and vertical reserved holes on the graphite blocks.

Generally speaking, uranium rods are inserted horizontally, and cadmium rods are inserted vertically.

The uranium rod is used for burning. It continuously releases neutrons. Using graphite as a moderator, it changes fast neutrons into slow neutrons and drives them into other uranium nuclei. The uranium nuclei will split and emit more neutrons.

Neutrons release energy at the same time.

If not controlled, the splitting of a uranium nucleus will release several neutrons. If this continues, more and more uranium nuclei will participate in the fission reaction. If this continues, all uranium nuclei will be destroyed in a short period of time.

If it breaks into pieces, it will become a nuclear explosion. (Limited by the uranium concentration of the nuclear reactor, it will not cause a nuclear explosion, but the heat will definitely soar.)

At this time, the cadmium rod acting as a control rod will come into play.

Cadmium rods can absorb neutrons. The more they are inserted, the more they will be absorbed, and the operation of the reactor will slow down. If a part of it is withdrawn, the reactor will speed up. If it is fully withdrawn, the nuclear reactor will heat up rapidly.

Therefore, in the operation of a nuclear reactor, the control rod must be able to be inserted and removed at any time as needed.

"This design originated from an accident." Krasnopolsky said: "At that time, there was a fire in the submarine and it had to be shut down quickly. However, the electrical system failed and could not be fully inserted. Therefore, someone had to enter above the reactor.

It was operated manually, and as a result, the accident resulted in the death of an engineer soldier."

Lao Maozi has always been very radical in the research and development of nuclear submarines. In order to make the submarines have excellent performance, they will use a lot of immature technologies. As a result, submariners will always face threats.

The famous K-19 became the widow maker.

"In addition to the problems with the control system, these control rods will expand slightly when their life span is approaching, which will also cause insertion difficulties. Therefore, we must increase the power of the electric drive system enough." Krasnopols

Key explained: "At the same time, because the submarine may flip over in the event of an accident, the control rod may not be aligned with the insertion position, or even fall off from the reactor, so we must retain the manual control system."

This chapter is not finished yet, please click on the next page to continue reading the exciting content! For the control system of the nuclear reactor, there must be enough system redundancy, which is not used at ordinary times, but once danger occurs, even if one or two people are sacrificed

The lives of submariners must also save more lives.

This is a multiple-choice question left to every submarine captain. If they make the wrong choice, they are not a qualified submarine captain.

Mr. Zhao nodded and then said: "Then, can we add a hydraulic system backup to it, so as to provide double insurance?"

Hydraulic system backup? Krasnopolsky’s eyes lit up: “Do you have a corresponding plan?”

"Yes, considering the possibility of electrical system failure, we use a hydraulic control scheme. In this way, even if the entire ship is powered off, the remaining pressure within the hydraulic system can still be used to perform shutdown operations."

Seeing that Krasnopolski followed his advice, Mr. Zhao continued: "You have noticed the problem of the submarine flipping out of control and being unable to align the insertion position. In fact, there is another extreme situation. If the submarine flips completely

, that is, if the boat body is turned upside down, all the control rods may fall off, so a special locking mechanism is needed.”

The power of the 091 nuclear submarine is not high and the noise is very loud. These are weaknesses, but there is one aspect that it does very well, that is safety. This submarine has never had any safety problems during operation!

Now, many ideas can be used to improve the nuclear reactor in front of us, so as to make it safer. Combined with its advantages of high power, it will be an advanced power for modern submarines in the future.

Qin Tao was completely speechless.

After all the technical issues were finished, Qin Tao said: "I heard that the university in the capital is already working on a high-temperature gas-cooled reactor. This kind of reactor is very safe. Can it be used on our submarines?"

Speaking of domestic development of nuclear reactors, we have to improve the temperature of gas-cooled nuclear reactors. This kind of reactor still uses graphite as the moderator, but it no longer uses water for cooling, but uses gas helium as the coolant. The temperature of the helium

Up to about 800 degrees.

The biggest feature of this kind of nuclear reactor is safety. In July 2005, the university carried out Taylor's experiment on the 10-MW high-temperature gas-cooled experimental reactor in which all control rods were withdrawn and superimposed without emergency shutdown. If it were other nuclear reactors,

Once all the control rods are withdrawn, the core of the nuclear reactor will melt and it will become a vicious accident.

However, the high-temperature gas-cooled nuclear reactor was unscathed.

This experiment is also the first of its kind in the world. It marks that China is at the world's advanced level in nuclear energy research and development. After the safety of this 10-megawatt nuclear reactor was verified, the country began to build a 200-megawatt industrial reactor and successfully connected it to the grid to generate electricity.

At that time, Professor Andrew Kadak of the Massachusetts Institute of Technology, former president of the American Nuclear Society, arrived at the site and visited the high-temperature gas-cooled reactor demonstration project under construction and sighed: "China is undoubtedly the world leader in high-temperature gas-cooled reactors.

And China will continue to lead the world for a long time to come."

The Daya Bay Nuclear Power Plant still has to use foreign technology. In later generations, domestic nuclear power technology will lead the world. This is a tribute to many nuclear power workers.

All of a sudden, all kinds of news were flying all over the sky, saying that the domestic advanced nuclear submarines all used high-temperature gas-cooled reactors and how powerful they were.

At this time, after hearing Qin Tao's words, Krasnopolski glanced at him: "Mr. Qin, I have participated in relevant meetings and know that you are making rapid progress in this area. Currently, the university in the capital is

We are planning to build a 10-megawatt test reactor, do you know its volume?"

Qin Tao shook his head.

"Then I can tell you that its height is 11 meters. If it is expanded to 170 megawatts of power, even if multiple furnaces are connected in parallel, the height will be about 40 meters."

Qin Tao smiled, not to mention nuclear submarines, not even nuclear-powered aircraft carriers can fit in!

The high-temperature gas-cooled nuclear reactor belongs to the fourth generation nuclear reactor. It is characterized by very good safety. Its disadvantages are low power density and very large size!

Therefore, to say that this thing can be used on nuclear submarines is just news from third-rate tabloids.

But...you can fool people!

Recently, some people are very enthusiastic about China's nuclear submarine technology. They want to get the submarine technology no matter how much it costs. They even go to various steel mills to buy high-performance steel, and would rather be deceived.

Qin Tao couldn't stand it, so he might as well announce it openly!

A few days later, a familiar figure appeared on the TV.

"I'm very happy today. I can sit here and host a program for everyone." Zhang Zhong on the TV looked very happy: "In the past, I always appeared in front of the audience as a guest. Today

, I am the host, and the program I host is called Zhang Zhongshuo Series, for example, it talks about tanks, planes, warships, and aircraft carriers. Of course, the first thing we want to talk about is submarines, so now our program

The name is Zhang Zhongshuo Submarine."

Zhang Zhong is very happy. He has played an important role in this field. At the same time, he has also gained a large number of fans. It can be said that he is already a leader in this industry. Now Zhang Zhong is very confident about his ability.

I personally hosted the show and was very satisfied.

"Of course, I can't do it alone. Today, we specially invited the leader in my country's nuclear reactor industry, now President Wang of ** University, to tell us about the advanced fourth-generation nuclear reactor. "

The camera turned to Principal Wang, with a smile on his face: "Hello everyone, I am very happy to be able to sit here and talk about nuclear reactors with you. We know that nuclear power technology is a great initiative for mankind to use nuclear energy peacefully, but in a few years,

In the course of ten years of use, nuclear power technology has also experienced some vicious accidents. For example, a nuclear power plant core in the United States melted down, and the Red Empire also learned the painful lesson of Chernobyl. However, humans will not be affected by this.

We have stopped moving forward, even talking about nuclear discoloration. These accidents have prompted us to research safer and more environmentally friendly nuclear reactors."

This chapter is not finished yet, please click on the next page to continue reading the exciting content! "So, Principal Wang, is there such advanced nuclear reactor technology now?"

"Yes, this is a high-temperature gas-cooled nuclear reactor. Its biggest feature is safety. Regardless of any accidents, this type of nuclear reactor will shut down safely."

"Then please tell us the audience."

The slideshow appeared on the screen, and Principal Wang's voice came.

"Previous nuclear reactors burned uranium rods. After they were used up, they needed to be replaced, which took a lot of time and faced the risk of nuclear radiation. Our current nuclear reactors burn spherical nuclear materials.
To be continued...