With that sketch, Chief Engineer Wang left the Star Imitation Star Institute and returned to the Nuclear Industry Group headquarters in Shangjing on the same day. He also contacted the experts in the direction of magnetic fluid power generation in the engineering institute, and the magnetic fluid power generation technology was available. The feasibility of applying the fusion control device was discussed.

However, although the team was gone, the working group of the Nuclear Industry Group remained on the side of Jinling, and the researchers at the Star Imitation Institute continued to communicate on technical issues.

At the same time, the experiment of the star device did not stop there.

After obtaining sufficient funding guarantees, the institute was almost extravagant to conduct an experiment every three days, with hydrogen and helium as the research objects, and to observe the various complex physical properties of the plasma in the star-like device.

Even in order to collect valuable data, Lu Zhou even ordered a 1mg precious bismuth/ruthenium mixture to be injected into the reaction chamber, and a test ignition was carried out at the risk of damaging the first wall material.

In fact, this experiment did cause some damage to the star device, but the damage is still within the scope of repair. Even so, the entire unit must not be shut down for one month.

Of course, although the cost is high, the return is quite rich.

They not only verified the feasibility of the technical idea to achieve fusion reaction ignition, but also obtained a piece of lithium that was bombarded by a neutron beam carrying 14mev energy.

Especially the latter, its scientific value can not be converted by money.

In China, probably only they are here, can do such a extravagant experiment.

At this moment, the hard-won lithium metal foil was quietly lying in a specially treated oxygen-free slide, which was placed under a scanning electron microscope by a worker wearing protective clothing.

In the outdoor laboratory, a group of researchers, such as Lu Zhou, standing in front of the computer, saw the data and pictures collected from the scanning electron microscope from the screen.

As they expected, the original metal surface was now riddled with holes.

Through the detection of the infrared spectrometer, even traces of strontium and barium elements can be observed in the curved channel.

Fortunately, this shows that the neutron beam carrying 14mev of energy did react with 63li, and they successfully recovered a portion of the strontium in the experiment.

As for the helplessness is...

The problems they face are too many. There are no words in a single word.

Looking at the images on the computer screen, Professor Li Changxia sighed softly.

"I bet that this thing will break when you touch it."

"You don't have to bet, even if you haven't been bombarded by neutrons, this stuff can't be said to be strong." Staring at the hard-won data on the computer screen, Lu Zhou said casually.

Sheng Xianfu shook his head: "Not just the problem of radiation damage, the ratio of calving and breeding is too low. And the most critical problem is not in recycling itself. The energy carried by the neutron beam is too high, often not with the surface. The 63li reacted, but inside the cladding material, even if the elements we needed were left inside the material, they could not be released."

The neutron carrying 14mev of energy is like a cannonball, and all the metal keys in front of it are as vulnerable as toys.

Moreover, the neutron penetrating the first wall is not only simple to make a hole in the first wall, but also forms a cavity inside the first wall material like a balloon, ultimately resulting in the overall material of the first wall. Swelling, embrittlement, and even surface material shedding, causing serious accidents.

This is also one of the main reasons why the fission reactor cladding material cannot be directly used in the fusion reactor.

Both materials are two orders of magnitude worse than the standard for resistance to radiation damage.

Up to now, their research has entered an unknown field, and this means that there is no longer any experience of the predecessors. What to do next, how to solve these problems, rely on them to think.

After thinking for a moment, Professor Li Changxia tried to propose: "How about the use of molybdenum in structural materials?"

"Molybdenum can't," he denied the proposal in a flash. Lu Zhou shook his head. "Molybdenum has good heat resistance, but it will turn into radioactive elements under neutron irradiation."

Another researcher continued to propose: "Tungsten? Tungsten has good heat resistance, and the metamorphic products are bismuth and antimony. There is no radioactivity problem!"

This time, I didn’t use Lu Zhou’s opening. Professor Li Changxia shook his head. “The problem of the old man is always talking about. The heat resistance of tungsten is not bad, but the plasticity is too bad. Thermal stress will cause cracking of the material surface... I am experimenting with diii-d When I was in the room interview, there was a report topic devoted to this issue. In short, it is impossible to use tungsten."

The lab was once again silent.

At this time, the boat that had been staring at the data on the screen, suddenly opened.

"If you can't keep the neutron beam inside, why don't we consider putting them over?"

“Let’s go?” Sheng Xianfu squinted slightly, then shook his head with a smile. “Let’s let us recycle the neutrons produced by the reaction?”

Recycling the neutrons produced in the dt fusion reaction is a key part of the entire nuclear fusion reactor technology. After all, the price of 氚 resources is tens of thousands of times, not only on the sale, but also on the cost of one gram is as high as 30,000 US dollars (17 Year data).

If the neutrons generated by the reaction cannot be recovered, not only will a large amount of energy be lost, but also the reactor will be "shutdown" due to the loss of helium.

In the ideal fusion reactor, whether it is sputum or neutron, it should be preserved as an intermediate product, and the resulting waste is only helium and heat.

Therefore, it is impossible to let go of the neutrons and say that you have to leave it.

Hearing the remarks of Sheng Xianfu, Lu Zhou smiled and continued.

"Let them go, it doesn't mean to let them go. In theory, no matter how we design the structure of the first wall, we can't avoid the damage of the neutron beam to the metal bond. However, the self-repair ability of the metal is too bad, it is more difficult. Solving the problem of metamorphosis."

"So, why not set the first wall to a material that allows neutrons to pass through and has a strong self-healing ability, and then use the liquid 63 lithium to recover the neutrons behind the first wall. As for the other side of the 63 lithium, A layer of base metal is used to reflect neutrons that penetrate the liquid lithium layer without reacting."

This design is equivalent to sandwiching liquid lithium between the first wall and the crucible.

Sheng Xianfu thought for a moment and thought that this method seemed feasible, but always felt that there were problems everywhere.

After thinking about it for a while, he picked out the most obvious two of the problems that he could think of.

"But what do you think of the material that allows neutrons to pass through and have a strong self-repairing ability? Even after moving the lithium material to the first wall material, we still cannot solve the damage of the neutron radiation to the structural material. And, as you said, after recovering the alizarin after the first wall, how can we carry it from the back of the first wall back to the reactor?"

Upon hearing these two questions, Lu Zhou smiled and said: "The second problem is not difficult to solve. At the working temperature of liquid lithium, both the vegetarian and the vegetarian are in a gaseous form, and both are Incompatible with each other."

“We only need to apply a weak upward force to the entire liquid lithium neutron recovery system to transport the generated alfalfa to the top of the system.”

“Furthermore, we only need to recycle the discharged 'gas' above the entire system.”

The generated helium and the helium as the exhaust gas are re-injected into the reaction chamber to heat ionize. As for how to remove helium from the reactor, this is the work of the divertor.

As for the choice of water-cooled divertor or tungsten-copper divertor or other divertor, it is good to choose the specific needs. Although this part of the technology is critical, it is not a difficult point that cannot be solved.

Speaking of this, Lu Zhou paused and continued, "As for the first question you said, such materials can't be found in the alloy. So, we simply discarded the whole metal!"

At the moment of hearing this sentence, not only Sheng Xianfu, who raised the question, but also Professor Li Changxia, everyone in the lab was stunned.

Discard metal materials?

This……

Is this too avant-garde?

“The structure material does not need metal?” Professor Li Changxia looked at Lu Zhou strangely. “What use?”

Is it ceramic?

Although there are research institutes that have tried this, the effect is also okay, but the fatal thing is that the thermal conductivity of ceramics is really bad.

If you can't take the heat away from the reactor, you will end up with problems.

"With carbon," paused for a moment, Lu Zhou said in a positive tone, "or more accurately, using carbon fiber composites!"

This is not the way that Lu Zhou’s whim has come to mind. He has been thinking about it for a long time. Even when he first chatted with Professor Kreb at the Spiral Stone 7-x Institute, he was considering it.

The carbon core is relatively stable, does not easily react with neutrons, and can act as a buffer for the neutron beam, so that when the neutron beam is in contact with the liquid lithium layer, most neutron beams do not directly break down. .

The part of the energy that is reduced by the carbon fiber layer is released in the form of heat energy, and by virtue of its good thermal conductivity, the heat generated inside the reactor can be easily derived.

As for the heat resistance, there is no problem at all.

When not exposed to air and oxidants, carbon fiber materials can withstand temperatures above 3,000 degrees, comparable to the melting point of tungsten, and fully meet the needs of the first wall material!

Looking around at everyone in the lab, Lu Zhou said: "Remove the low-activated metal material completely from the first wall, use carbon fiber as the first wall material and the main structural material, fill the liquid lithium in the middle layer, and use the outer layer.铍 coating, reflecting neutrons. The shielding layer is mixed with paraffin and water and boron carbide, and covered with nuclear power cement. As a result, we are completely hopeful to solve the problem of stagnation!"

As for the choice of carbon fiber composite materials, how to solve the self-repairing problem of carbon fiber composite materials, this topic will be studied by the Materials Research Institute of Jinling Institute of Advanced Studies.

Although the problem is very serious, Lu Zhou has hopes to solve it!

Professor Li Changxia couldn't help but say: "This is too..."

What he wants to say is that this is too ridiculous.

But this sentence was only half of it, and it was interrupted by Sheng Xianfu.

"No, I can't say... there is really hope for doing this!"

Interrupted Professor Li’s words, Sheng Xianfu constantly rubbed his chin with his index finger, and his eyes were brighter and brighter.

“I have consulted the relevant literature and replaced some austenitic steels and tungsten steel structures with carbon fiber. It is a technical route that is similar to nano ceramics in the field of internationally controlled fusion!”

"However, the carbon fiber composite material completely replaces the metal material, as the main body of the structural material, and the decelerated neutron beam is placed on the outside of the cladding material to react with the liquid lithium, and then the halogen in the liquid lithium is recovered by the transfer function... I have heard about these for the first time."

The difficulty is not too small, and it is not just a problem with the carbon fiber composite itself. For example, in the control of temperature. The carbon fiber material of the first wall has an operating temperature of about 3,000 degrees, while the lithium metal has a boiling point of only 1,340 degrees.

If the heat cannot be taken away in time, the liquid lithium in the entire “Liquid Lithium Neutron Recovery System” is at risk of being vaporized, and it is involved in the reactor together with the ruthenium mixture formed by the reaction, and even the whole may even The reactor is blown up...

There is also the problem of volume change caused by solidification of liquid lithium during shutdown...

But as Lu Zhou said, this idea seems to be feasible.

At least, it's worth a try!

-

(I went out yesterday, I went out,)

Https:

Genius one second to remember the address of this station: . :m.