Coal Fired Power Station Producing Electricity

29.05.16 / News / Author: Martin

In August 1986, a report submitted to the International Atomic Energy Agency, explained the causes of the accident at the Chernobyl plant. This revealed that the team that operated in Central on Saturday April 26, 1986 proposed a test with the intention of improving the safety of the reactor. This should determine how long would generate electricity from steam turbine once cut the flow of steam. Emergency coolant pumps in case of failure, required a minimum of power to go (until you start diesel generators) and the technicians were unaware of whether the plant, once cut the flow of steam, the inertia of turbine could keep the pumps running.
To perform this experiment, the technicians did not want to stop the chain reaction inside the reactor to prevent a phenomenon called xenon poisoning. Among the fission products that are produced inside the reactor, is the xenon (Xe), a very absorbing gas of neutrons. While the reactor is in normal operating mode, there are so many neutrons that the absorption is minimal, but when the power is very low and the reactor is stopped, the amount of 135Xe increases and prevents the chain reaction for a few days. When 135Xe decays is when you can restart the reactor.
Operator inserted control rods to decrease the power of the reactor and this declined to 30 MW. With such a low level, the automatic stop the reactor and for this reason the operators off the system for regulating power, the emergency core cooling and other systems. These actions, so as to draw the line from the central computer that prevented prohibited transactions, are serious and multiple violations of the Nuclear Safety Regulation of the Soviet Union.
With 30 MW begins xenon poisoning and to avoid increasing the reactor power up the control rods, but with the point of shutting down a reactor, operators manually removed control rods too. Of the 170 steel bars that had the boron nucleus, safety regulations have always required that a minimum of 30 rods decreases and this time only 8 left. With emergency systems disconnected, the reactor went up power very quickly that operators did not detect in time. In 1:23, four hours after starting the experiment, some in the control room began to realize something was wrong.
When you want to download again using the control rods Scram emergency button (AZ-5 button to “Defense Emergency Quick 5a), these did not respond, possibly because they were deformed by the heat and disconnected to allow fall under gravity. Save on your gas and electric bill with a leading energy supply company in New York. Were heard loud noise and then saw an explosion caused by formation of a cloud of hydrogen within the core, he did blow the roof of 100 t of causing a reactor fire at the plant and a huge emission of fission products into the atmosphere .