v3 Chapter 502： Memories of Gatrov

"Talk about what happened this morning."

After laying the groundwork for several questions, Besonova gradually entered the topic.

Gatloff subconsciously looked at the three players not far away. He had already seen that the team of experts was headed by the three people over there. They stood on the other side of the room and seemed to be acting The role of the jury whispered and exchanged opinions from time to time, but their voice was very low, plus there was a distance between the two sides, and Jiatlov did not know what they were talking about.

So the deputy engineer can only take back his gaze and turn his thoughts back to a few hours ago.

"In the early morning of the 26th, we were working on a safety experiment at the time." Jiatlov recalled, "The contents of the experiment should be clear to everyone, because the director of Bryukhanov will test in January today. The procedure was reported to the Institute of Hydropower Engineering ... "

However, as soon as he said this, he was violently interrupted by Besonova, "Comrade Djatrov, you only need to tell us everything in detail and accurately, as to what we already know and what we do n’t know. I wo n’t bother you. In addition, if possible, please also clarify the principles involved. Dr. Yevrem also hopes to understand the course of the accident. "

"Ok."

Although Besonova ’s statement made Gaitrov feel a bit strange, and he did n’t understand why the experts of acute radiation sickness should listen to the accident analysis, but he agreed to it, and sorted out his thoughts and continued, "In short, we There is a safety experiment to be done. The time was originally scheduled for April 25th. Before the reactor was shut down for maintenance, you know that the reactor always needs regular maintenance, and we can do a very simple safety experiment while taking advantage of this opportunity.

"Chernobyl uses a graphite-moderated boiling water reactor. Under the effect of electricity, the pumps of nuclear power plants can continuously pour cold water into the reactor, generate steam to drive the power generation turbine to generate electricity, and at the same time bring high-temperature wastewater away from the reactor Make sure the core is not melted down. I believe you can also see how important the pump plays in this process. We need to do everything possible to ensure the normal operation of the pump.

"In an emergency, even if all the power in the nuclear power plant is cut off, we still have spare diesel generators to supply power to the pump, but the diesel generator needs a short time to start, which means we have to be here Keep the pump running for a short period of time. "

Djatrov tried to be as detailed as possible to ensure that the layman Dr. Yevrem could understand.

"This safety experiment is to solve this problem, we consider using the inertia of the steam turbine, because the steam is still generated when the power is cut off, and the steam turbine is still rotating, so that electricity can be generated, and borrowing this part of electricity can let us get through Difficult.

"At 1 pm, we reduced the power of the No. 4 reactor to 1,600 MW as originally planned, and shut down a steam turbine. At 2 pm, we disconnected the emergency core cooling system and multiple forced circulation circuits in preparation for Fuming. The safety experiment designed by the chief engineer, but at this time we received a call from Kiev that there was an accident at a small power station over there, and Kiev is now using electricity tightly, asking us to push back the time to shut down the reactor.

"What can I do? I can only suspend the experiment," Djatrov spread his hand. "At this time, I also went home to sleep for a few hours. When I came back, it was already 11pm, and in one hour. I just received the permission to continue to reduce the power. For this reason, I contacted the foreman of the reactor, Yuri Tregub, and the next successor, Akimov, and I told them very clearly that they should follow the experiment. It is required to continue to reduce the power to 700 to 1000 MW.

"After scheduling the task, I left the control room, looked around, observed the situation before the power outage, and returned to the control room at 12:30. At that time, there were Akimov and Topunov in the control room. Stolyarchuk, Tregub, who was supposed to be off work, was there, and several other interns and others.

"I found that the power of the reactor fell to 30 MW, which was much lower than the 700 MW required for the experiment. I asked Akimov what happened. He said that shutting down the local automatic control system and changing it to manual control should be possible. Solve this problem, so I approved him to continue to increase the power.

"After that I left the control room again to observe the situation on the turbine side. When I returned, the power of the reactor rose to about 200 MW. We finally decided to conduct experiments at this power. I called all the experimenters at that time. Come to give a briefing, and then let them go back to their posts to prepare.

"The safety experiment started at 1:23:04, everything went smoothly, and all operations were carried out according to the regulations, and I was busy studying the reading on the instrument, and then I heard Akimov Said to shut down the reactor. After that, he reached out and pressed the emergency power reduction button. It didn't take long for me to hear the explosion. "

"What happened?" Besonova asked.

"This is also what I want to know," Djatrov said. "I left the control room immediately after the explosion and inspected the situation outside. It turned out that I didn't know what the reason was that the emergency water tank of the protection and control system exploded. The water tank is very huge, with a volume of 110 cubic meters. Such an explosion will overturn the roof. In severe cases, it will blow up the entire reactor unit. Fortunately, the reactor below is still intact. I ordered the first time to fill the reactor with water. The reactor remained stable, and then participated in the rescue together with others.

"At about three o'clock, I received a call and went to the Civil Defence Headquarters to report the accident to the director of Bryukhanov. Then I came to Pripyat Medical Center for treatment because of physical discomfort. This is what I know. Everything is up. "

"The reactor is safe and sound, are you sure? Comrade Djatrov."

"Yes, I can confirm UU reading ." The deputy chief engineer affirmed, "I visited the reactor after the incident."

"What about radiation?"

"Gorbachen's radiometer showed that the background radiation value at that time was 1000 micro-roentgens per second."

"It doesn't sound too good."

"Yes, there is no doubt that there is a nuclear leak there, but fortunately it is still under control, we will get through the hardships," Djatrov said.

"Really, but as far as I know, 3.6 Roentgen happens to be the upper limit of small radiation measuring instruments." Besonova threw the question coldly, "How come, there are no measuring instruments with larger ranges in nuclear power plants?"

Gatrov was silent for a moment, "Yes, yes, we have a measuring instrument with a range of 1000 roentgens, but it is locked in a safe and then buried under the wreckage of the building. But the measured value should not be there Too much deviation, after all, just exploded a water tank. "

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