Chapter 1176

Fuming's calculation is very good. Now there is a training course, but it is not aimed at the new recruits like Zhang Heng, but the old people who have worked in the nuclear power plant for a period of time. In fact, it is equivalent to a training course, and the people on 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. However, when he got the list, he found that Ivan's name was also on the list.

Fuming was surprised. He asked someone, but he couldn't laugh or cry. He didn't expect that he didn't mention it. However, 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 later he had a private chat with Zhang Heng.

Fuming was originally intended to show his approachable side and win people's hearts. However, he was used by Zhang Heng instead, and the latter didn't even say die. It just hinted that the head of the Department added his name. After all, as the chief engineer of the operation Department of the nuclear power plant, fuming didn't want to offend him.

Even people who are not used to him usually don't want to fight him on such trifles. It's just a training quota, and no one even asks him for credit. That's why fuming didn't know Zhang Heng was on it until he got the list.

But the list will eventually need his approval. Fuming's pen stopped on Ivan's name for a moment, and finally moved to the lower right corner, wrote the word "agree" and signed his name.

Although fuming is dissatisfied with Zhang Heng's self assertion, his mind of soliciting Zhang Heng has not changed. It's one thing not to say hello. It's another thing to take the initiative to cross out Zhang Heng's name, which will force Zhang Heng to his opposite. So fuming finally recognized it by holding his nose.

Facts have proved that Zhang Heng, who has been baptized by the black sail pirate Island, can hardly cope with the factional struggle in a nuclear power plant. Even if he has ten fuming, he will not be his opponent.

It took less than a year and a half for Zhang Heng to make clear the relevant physical knowledge, the design drawings and principles of the reactor, and even all the equipment circuits of the whole nuclear power plant. 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 works in a nuclear power plant. When he returns to his residence at night, he will continue to learn Russian and Ukrainian with the hostess. In addition, Zhang Heng also took time to go to the hospital in Kiev for two reexamination, probably because he is young and strong enough. At least for the moment, he has recovered well, and no malignant tumor has been detected.

After Zhang Heng practiced Ukrainian to the level of normal communication, his language proficiency skills, which had been quiet, were finally upgraded from Lv2 to LV3. So far, including his mother tongue, Zhang Heng has reached the level of daily communication in 11 languages.

Moreover, this parallel copy also enabled him to acquire a skill in nuclear engineering. Now it is Lv2 level. Of course, Zhang Heng's biggest achievement is to find out what defects are in fuming's safety experiment and reactor design.

It must be admitted that, compared with the pressurized water reactors used in most countries in the world today, rmbk has some natural defects at the beginning of design. It has the advantages of faster construction speed and lower operation cost at the cost of sacrificing part of safety, refueling without shutdown, and producing military plutonium.

In the eyes of the people at that time, if there were any shortcomings, it might be that the radioactivity of the emissions from the rmbk reactor was slightly higher than that from the VVER pressurized water reactor.

But in fact, the more serious problem lies in the design of the control rod. Jatrov once said that the control rod is used to regulate the nuclear fission reaction, because the boron in the control rod can absorb neutrons, which can also reduce the power of the reactor. However, the problem is that there is a small section of graphite at the lower end of the control rod. The role of graphite as a neutron moderator is just opposite to that of boron, which is used to control the nuclear fission reaction The fast neutron is decelerated to slow neutron to increase the power of the reactor.

Of course, the reason why the earlier designers did this design is not to let the reactor operators feel the "surprise" brought by the inversion. The graphite at the bottom also has its role, because the graphite reactor has a significant deceleration effect on neutrons, which can appropriately reduce the purity of uranium fuel and save costs.

From the economic point of view, this is no problem, but the low abundance uranium fuel is not stable during the reaction, especially when the reactor is running at low power. At this time, the graphite at the lower end of the control rod can play a role, which can make the reactor better controlled.

But this kind of design will bring potential risks. When the control rod is completely pulled out of the reactor and then inserted back, the first contact with the core is graphite instead of boron. At this time, the reaction power will not decrease but will increase, although the whole process time is very short.

What surprised Zhang Heng was that, according to the information he collected, before the accident of Chernobyl nuclear power station, other nuclear power stations had found that the power of control rods increased first and then decreased after they were inserted into the reactor, and reported it to the relevant departments. However, because there was no safety accident, they did not get enough attention.On the other hand, it should be admitted that the designers of the rmbk reactor have 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 immediately opened and injected into the reactor. However, in order to prevent the cooling water from entering the high-temperature reactor and causing thermal shock, fuming disconnected this life-saving device from the multiple forced circulation circuit in the experiment It's on.

After seeing fuming's first failed experiment, Zhang Heng was almost certain that the people in the central control room did not follow the safety manual as they said before.

The situation on the night of the explosion was much more complicated than that of the first experiment, because the safety experiment did not go on as planned. Before, the reactor had been running at low power for quite a while and fell into the iodine pit. In order to climb out of the iodine pit, the operator pulled out too many control rods, which eventually led to the rapid rise of the reactor power. Later, the safety system was cut off, Unable to take effect immediately, the people in the central control room had to insert all the control rods back into the core in a hurry to suppress the fission reaction.

Unexpectedly, the design defects of the triggering rate reactor eventually led to the GG of the whole nuclear power plant.

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