Fuming's abacus is playing well, and there is a training period right now, but it is not aimed at newcomers like Zhang Heng, but old people who have worked in the nuclear power plant for a period of time, which is actually equivalent to a refresher class, and those who enter the list are more likely to be promoted after the training.

Fuming didn't say hello to the chief engineer of Zhang Heng's department, but when he got the list from the newspaper, he found that Ivan's name was also on the list.

Fu Ming was taken aback, and asked someone but was a little crying and laughing, he didn't expect that he didn't mention it, but Zhang Heng directly found the leader of the department, and then pulled up his tiger skin, many people already knew what he said for Zhang Heng in the interview, and then he chatted with Zhang Heng privately.

Fuming was originally to show his approachable side and win people's hearts, but he didn't expect to be used by Zhang Heng instead, and the latter didn't even say anything to death, just hinted at it, and the head of the department added his name, after all, Fuming is the chief engineer of the nuclear power plant operation department, and no department wants to offend him.

Even people who are not used to him usually don't want to go against him in such a trivial matter, just a training place, and no one even asks him for credit. This is also why Fuming didn't know that Zhang Heng was on it until he got the list.

But the list will eventually need to be approved by him. Fumin's pen paused for a moment on Ivan's name, but eventually moved to the lower right corner, where he wrote two words of agreement and signed his name.

Although Fu Ming was a little dissatisfied with Zhang Heng's self-assertion, his mind to recruit Zhang Heng had not changed, it was one thing not to say hello, and it was another thing to take the initiative to cross out Zhang Heng's name, which would completely force Zhang Heng to his opposite. So Fuming finally pinched his nose and recognized it.

It turns out that Zhang Heng, who has been baptized by the Black Sail Pirate Island, is not too easy to deal with the factional struggle in a nuclear power plant, even if there are ten Fuming, he will not be his opponent.

It took Zhang Heng less than a year and a half to figure out the relevant physical knowledge, the design drawings and design principles of the reactor, and even all the equipment lines of the entire nuclear power plant, and in the second year of Chernobyl, he also got the safety experiment plan designed by Fuming, and even watched the failure of the first safety experiment.

During the day, he worked at the nuclear power plant, and when he returned to his residence at night, he would continue to learn Russian and Ukrainian with the hostess, in addition, Zhang Heng also took the time to go to the hospital in Kyiv for two reexaminations, probably because he was young and strong enough, at least for now, his body has recovered quite well, and no malignant tumors have been detected.

And after Zhang Heng also practiced Ukrainian to the level of normal communication, his language proficiency skills, which had been without movement, were finally upgraded from lv2 to lv3. So far, including Bao's native language, Zhang Heng has eleven languages that have reached the level of daily communication.

And this parallel copy also allowed him to gain another nuclear engineering skill, which is now at the lv2 level, of course, Zhang Heng's biggest gain is to figure out what flaws are in Fuming's safety experiment and reactor design.

It must be admitted that compared with the pressurized water reactors used by most countries in the world today, the RMBK has natural flaws at the beginning of its design, which sacrifices some safety in exchange for faster construction and lower operating costs, can be refueled without stopping the reactor, and can also produce military plutonium.

From the perspective of people at the time, if there were any drawbacks, it was probably that the emissions from the rmbk reactor were slightly more radioactive, and they were not as clean as VVER pressurized water reactors.

But in fact, the more serious problem lies in the design of the control rod, before Gatlov also said that the control rod is used to regulate the nuclear fission reaction, because the boron that makes up the control rod can absorb neutrons, which can also reduce the power of the reactor, but the problem is that there is a small section of graphite at the lower end of the control rod, and the effect of graphite as a neutron moderator is just the opposite of boron, which is used to slow down fast neutrons into slow neutrons to increase the power of the reactor.

Of course, the reason why the previous designers designed this was not to let the reactor operators feel the "surprise" brought by the reversal, and the graphite at the bottom also has its effect, because the graphite reactor has a significant deceleration effect on neutrons, which can appropriately reduce the purity of uranium fuel, thereby saving costs.

There is nothing wrong with this from an economic point of view, but the low-abundance uranium fuel is not stable enough during the reaction, especially when the reactor is running at low power, and this is when the graphite at the lower end of the control rod can come into play, which can make the reactor more controllable.

However, this design carries the potential risk that when the control rods are completely withdrawn from the reactor and then plugged back in, the first contact with the core is graphite instead of boron, and the reaction power will not be reduced but will be increased, albeit in a short time.

To Zhang Heng's surprise, according to the information he had gathered, before the accident at the Chernobyl nuclear power plant, other nuclear power plants had discovered the problem of the power of the control rod rising first and then falling after inserting it into the reactor, and reported it to the relevant departments, but because it did not cause any safety accidents, it did not receive enough attention.

On the other hand, it should also be recognized that the designers of the RMBK reactor have also made a lot of efforts to ensure the safety of the reactor, for example, the safety manual clearly stipulates that during the operation of the reactor, the core must ensure that at least 28 to 30 control rods are inserted.

In addition, the reactor is also equipped with an emergency core cooling system, when the cavitation coefficient in the reactor increases, the water tank of the emergency core cooling system will be opened immediately and injected into the reactor, but in order to prevent the cooling water from entering the high-temperature reactor and causing thermal shock, Fumin disconnected this life-saving device at a critical moment from multiple forced circulation loops in the experiment.

And after seeing Fuming's first failed experiment, Zhang Heng was almost certain that on the night of the explosion, the people in the central control room did not fully comply with the safety manual as they said before.

The situation on the night of the explosion was much more complicated than in the first experiment, because the safety experiment did not go as planned, the reactor had been operating at low power for a considerable period of time, fell into the iodine pit, and in order to climb out of the iodine pit, the operator pulled out too many control rods, which eventually led to a rapid increase in the power of the reactor, and then because the safety system was cut off, it could not take effect immediately, and the people in the central control room could only hurriedly insert all the control rods back into the core, trying to suppress the fission reaction.

Unexpectedly, the design flaw of the trigger rate reactor eventually led to the entire nuclear power plant GG.