"Yes, from 500 to 600 degrees Celsius, the temperature may be a little higher at the moment when the plasma is destroyed and the thermal shock occurs, but this temperature will not exceed 1000 degrees Celsius."

In the vacuum environment inside the stellar device, temperature transmission mainly relies on plasma radiation and infrared radiation. There will be no point in the life point of a furnace and even if it is blocked, air circulation is used as a temperature transmission medium.

"With the barrier of the two ceramic movable interlayers in the front, they replaced the first inner wall material with carbon fiber material in the demonstration stack.

The melting point temperature of carbon nanomaterials in a vacuum environment is as high as 3000 degrees Celsius, and the thermal conductivity is far greater than that of all metal materials. The neutron penetration is good and the resistance to neutron radiation is better than other materials. The damage caused by high-energy neutron radiation is self-repaired by its own material special effects..."

"Wait, Professor Lu."

Academician Wang suddenly interrupted when he heard this and asked: "The first inner wall of carbon materials was tried ten years ago, but because of the poor compatibility of carbon and hydrogen, it will react to form methane. Soon after, this plan was eliminated."

Hearing Professor Lu’s name, Lu Yi smiled and said, “Academician Wang, the carbon material used ten years ago was graphite. This is really not good. It will react with various isotopes of hydrogen and hydrogen to form methane.

However, now we use carbon nanotubes or graphene, which are molded with carbon fibers.

The unique physicochemical properties of carbon nanomaterials do not react with hydrogen to form methane when the operating temperature does not exceed 1,000 degrees Celsius."

"Professor Lu, carbon nanomaterials will not react with hydrogen to form methane in this environment, but carbon nanotubes or graphene have a natural adsorption and storage effect on hydrogen."

Another nuclear fusion expert who has studied carbon nanomaterials raised questions: "If Map Laboratory follows this plan, the tritium that is discrete from the constrained magnetic field, or the tritium element in the reaction cycle of the lithium cladding in the rear will be adsorbed into the carbon nanometer inner wall material, forming a more serious problem of tritium retention."

"This question is actually very simple. There is no upper limit on the adsorption of hydrogen by carbon nanomaterials. Just feed it in advance.

In addition, in order to prevent the loss of the reactor's tritium in the hydrogen element in the carbon nanomaterial during the operation of the reactor, in addition to the 6Li material commonly used in the nuclear fusion lithium proliferation cladding, they also doped with a certain proportion of lithium isotope 7Li in the lithium cladding.

The reaction between neutrons and 6Li produces helium 4 and tritium, while the reaction between 7Li produces helium 4 and tritium plus a neutron.

Of course, compared with the reactions of 6Li and neutrons, the reactions of 7Li and neutrons are too weak. In a high probability, neutrons will pass through the house without entering, which is not very suitable for nuclear fusion lithium proliferation cladding.

However, in this solution, the lithium proliferation cladding is doped with a certain proportion of 7Li isotopes. Even if the reaction is weak, it is to make up for the part of the tritium retention in the inner wall material of the carbon nanometers."

"The tritium and helium produced by the reaction of neutrons and lithium are both gaseous forms. Using the characteristics of almost zero solubility in liquid lithium, a certain force is applied to the lithium proliferation cladding to make it flow and stir.

Then the tritium and helium generated by the reaction will float onto the lithium proliferation cladding due to density reasons, and then recover the gases and inject them into the plasma reaction orbit.

Finally, a layer of beryllium oxide is wrapped behind the lithium proliferation cladding to reflect the neutrons penetrating the cladding back to isolate the neutron radioactivity in the reactor, and also avoid neutron dissipation and waste.

This is the entire structural design and operation principle of the Map Laboratory nuclear fusion demonstration reactor. The overall design improvement is very simple, but we can't do it."

After Lu Yi finished speaking, everyone present was silent.

They understood that the demonstration stack of Map Laboratory was built and the equipment and instruments were adjusted several times, which could be said to have met the standards for commercial application.

After all, there are not many problems with the controllable nuclear fusion device of imitation stellar devices, and there are no problems such as torn magnetic surfaces, magnetic islands, etc.

It solved the problem of tritium recycling, solved the high temperature and material denaturation caused by plasma radiation, and solved the problem of neutron radiation, and then the next thing was boiling water.

Everyone has had hundreds of years of experience in this regard by boiling water to convert the energy generated by nuclear fusion into electrical energy.

If you want to be more advanced and have a higher energy utilization rate, you can combine magnetic fluid power generation with boiling water.

The energy released by fusion and the energy produced by high-energy neutrons after reacting with lithium to generate tritium, which is used to boil water. Another product of nuclear fusion, that is, helium ions at high temperatures of 100 million degrees Celsius, can be used to generate electricity by magnetofluids.

But such a solution and design can only be seen but not eaten. During the process of the movable ceramic interlayer spiral around the outer diameter of the plasma track, the stability of the activity is very high, and it must be as smooth as silk, and there must be no excessive friction or collision.

Otherwise, falling substances will cause great pollution when entering the plasma. At the very least, nuclear fusion reaction will stop and destroy equipment and instruments, and at the worst, the entire reactor will explode.

Behind these requirements, the processing accuracy involved is something that cannot be achieved in China's current industrial level.

"Lu Lu, we may be able to use carbon nanomaterials as the first inner wall material."

Zhang Qing, who was sitting next to Lu Yi, talked with Lin Meng for a while and suddenly said.

"This won't work."

An expert studying carbon materials in the conference room shook his head: "The heat resistance and radiation resistance of carbon nanomaterials can meet the needs of the first inner wall, but the thermal conductivity is too strong.

If we cannot first isolate the plasma radiation received by the first inner wall like Map Laboratory, and control the temperature below the lithium boiling point temperature, and face the plasma to produce high temperature, it will be transmitted to the back faster than the heat dissipation speed, causing vaporization of the cladding."

“This problem can be solved.”

Zhang Qing took the data analysis from Lin Meng's modeling and said confidently: "For example, adding an additional layer of nanoceramic material between the carbon nanomaterial and the liquid lithium proliferation cladding on the first inner wall for temperature buffering, so that more heat dissipation time can be obtained."

"Nanoceramics have poor thermal conductivity, and the temperature will accumulate on the ceramic layer. Over time, the temperature of the ceramic layer will still exceed the boiling point temperature of lithium."

This time, Academician Wang proposed a veto. He had tested ceramic materials on Tokmak, but it was not possible.

“What if it’s multi-layered?”

Zhang Qing put his left hand on the table and his right hand overlapped on it, and his expression was a little fluttering: "Carbon nanomaterial-ceramic layer-carbon nanomaterial-ceramic layer and other multi-layer composite structures, carbon nanomaterials perform rapid heat dissipation, ceramic layer serves as temperature buffering, and space size issues, we can process the single layer material a little thinner..."
Chapter completed!