Tribute to Chernobyl adversity - Sleeping Sun

!: Tribute to Chernobyl adversity - Sleeping Sun

Why did the reactor explode? A safety test was due to be carried out on the reactor in the winter. This meant shutting it down. Consumers used too much electricity, so the test was delayed until the spring of 1986. The purpose of the test was to find out wheather the water pumps could supply enough coolant if power levels drop. The power plant ran on its own electricity, which it produced. So if in any case, there is a need for an emergency shutdown (SCRAM), would there be enough time to fire up the diesel generator to keep the water pumps supplying cool water through the core? A nuclear reactor needs coolant for some time even after a complete shutdown. 1 minute is all the time that is needed for the diesel generator to kick in. - April 25, 1986: at 1 am in the morning, operators started to decrease the 3,2 GW thermal output. - By 1 pm power was reduced to 1,6 GW. - By 2 pm, operators were informed: despite the coming weekend, consumers used more electricity, than what was expected. Further power deduction was stopped. - By 11:15 pm, the operators were informed: consumer needs dropped, the 4th reactor can be disconnected from the grid. So the test began with junior operators. The senior operators usually had the benefits of working in the daytime. The more junior staff was also experienced and qualified, but junior. Anatoly Diatlov, chief engineer of the Chernobyl Nuclear Power Plant was to lead the operations. To his command, various automatic systems, inculding the ...

Tribute to Chernobyl adversity - Sleeping Sun

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