Great Power Technology.

Chapter 515 The Final Inspection Before Ignition

After leaving the ward where Qian Lixun was resting, Ye Zhou immediately notified Chen Hao that he was going to receive the technical documents provided by Chouguo. At the same time, he also came to the core target room of the Shenguang No. [-] device and restarted the temporarily suspended pre-ignition test Work.

"Has the flaw detection been completed?"

Ye Zhou flipped through the test record document in his hand, and asked the staff on the side.

"It's been done, the material behaves well, ODS steel weld segregation damage is manageable - most of the structure is spray formed and there are very few welds, not much impact."

Ye Zhou nodded slightly. In fact, compared to the other core difficulties, Ye Zhou was most worried about the welding problems that did not apply the technology provided by the simulator.

Because the ODS technology is used on a large scale in the material technology of the first wall, the strength, creep resistance and radiation resistance of the material can be greatly improved through the small ODS particles dispersed in the alloy matrix.

However, the problem ensues, that is, the welding difficulty of this material is quite large.

If the ordinary welding method is used, the ODS phase will be severely segregated under the action of gravity and solid-liquid interfacial tension after partial melting and re-solidification, making the welded part the weakest point in the structure.

"What welding method was used?"

"A small part uses laser welding, and most of them use explosive welding. Part of the problem with laser welding is not serious. The current welding equipment has a high instantaneous temperature and the welding gap is extremely small, which can be controlled within the strength requirements. "

The so-called explosive welding refers to the processing technology that uses the energy of explosive explosion to fuse two metal plates of opposite sex together. This process is essentially a kind of pressure welding. The pressure and temperature inside the material do not change much. The pure solid state sintering mechanism also ensures the ODS phase stability inside the material.

However, in the long run, the cost of this welding method is too high, and the success rate and yield rate are also low. If you want to spread fusion devices on a large scale in the future, you will definitely have to go to the road of integrated molding casting.

After confirming that there was no problem with the welding technology, Ye Zhou did not check the vast number of inspection items one by one. This is a systematic project, and each person is responsible for his own piece. As long as the person in charge thinks there is no problem, then there is no problem.
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In other words, it can only be considered as no problem.

Personal knowledge plays a limited role in it, as long as the key nodes are controlled, the success rate of the experiment can basically be guaranteed.

And this is actually the reason why Qian Lixun was able to resolutely let go at this time. If the project is still in a state where he has to go, it is estimated that even if he is desperate, he will have to complete the entire testing process.

After browsing in silence for a while, Ye Zhou asked directly:
"Are there any high-risk points found in the inspection? Is there any component that is not performing well?"

The staff member on the opposite side shook his head, but immediately nodded again.

"It stands to reason that from our current test results, there are no high-risk points, but there is one problem. Everyone is a little worried about the performance of the first wall material."

"Is it because there is no irradiation experiment?"

Ye Zhou frowned and asked.

In fact, according to the normal process, the ANR-HT material as the first wall material should be subjected to a full range of irradiation experiments, but this kind of experiment is too difficult.

The irradiation faced by fusion reactors mainly includes three parts: neutron irradiation, ion irradiation and electron irradiation. Among them, the experimental conditions of neutron irradiation are the most harsh. Judging from the current technology, there is no suitable experimental place for human beings. And equipment, the only thing that can be done is to do experiments with fission reactors.

This experiment requires long-term irradiation to achieve DPA—that is, the dislocation rate of atoms caused by irradiation. After the irradiation is completed, it is necessary to find a place to place it for a period of time to eliminate the radiation dose. Under the dose of radiation, it is really to exchange one's own life for the result.

In addition to neutron radiation, ion radiation and electron radiation are much safer, but high-energy ions are difficult to do macroscopic testing, and electron radiation has the problem of high-voltage electron microscopy, which is time-consuming and troublesome to operate.

All in all, considering these problems, Ye Zhou's final order was to skip the large-scale irradiation experiment and only do a few key metal phase tests. This is probably the reason why the staff did not have high confidence in the material.

Hearing Ye Zhou's question, the staff on the opposite side nodded and replied:
"That's true. Leader, you know that most of these researchers are dead-minded. If they can't see the data, they just don't feel at ease."

"However, this does not affect the overall progress of the experiment. We just want to know, is this material really reliable?"

Ye Zhou didn't know how to answer this question for a while. From his own point of view, he could pat his chest to assure that the materials were absolutely fine, but how to convince the staff?

Although the previously provided documents contain a series of test data, those data have not really passed the hands of any researchers, and they are not experiments done by themselves, so they will naturally remain a little skeptical.

This is probably the truth-seeking spirit common in scientific research—it seems a bit difficult to understand, but it is precisely under this rigorous spirit that technology can continue to develop.

After thinking for a moment, he opened his mouth and replied:

"We can discuss the issue of radiation testing later. The experiment can be done, but the problem is that our time is too tight and we can only postpone it."

"It's normal to question the existence, but there must be no problem with the material itself, and you can rest assured of that."

"The most important thing now is to achieve the ignition first. If you encounter any resistance in the advancement, you can tell me and I will find a solution."

The staff nodded and replied:

"Understood, then we will continue to follow the road signs and plan to start the ignition in 5 days."

5 days, if according to the requirements of the current technology related to the production of target pellets, after obtaining the technology of Ugly Country, using the existing resources, it will take about 5 days to manufacture new target pellets, which gives them a chance .

A chance to solve the problem once and for all.

"Has the target ball been installed?"

Ye Zhou asked.

"Not yet, the test of the black cavity of the target pellet is at the end, so it hasn't been installed yet."

"That's good. In a few days, we may use a new target ball. We will test it first. If the result is good, then replace the current one with the new target ball."

"New target ball?"

The staff member repeated in surprise, and after a short pause, continued to ask:

"Leader, where did the new target ball come from?"

"It was sent by the Ugly people. In this regard, their technology does have an advantage."

"Ugly Chinese? Send it? Why?"

The other party asked in shock.

Ye Zhou smiled and replied:
"Who knows? Maybe they suddenly wake up and realize that being a dog lick is the only way out."

(End of this chapter)