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25 April 198601-06The planned gradual decline of power of reactor began03-47Power of reactor is stopped at the level of 1600 MW(t)14-00The emergency system of cooling of kernel is isolated (part of the program of test). Power must was be lowered yet more, however from Kiev a query came to leave power at former level (1600 MW(t)). The test program is deferred23-10Repeated diminishing of power26 april 198600-05The level of power attained 720 MW(t) and continues to diminish00-28Level of power – 500 MW(t). A management is translated in the automatic mode, however much it resulted in the unexpected falling of power to 30 MW(t)00-32An operator tries to recover power, taking out the bars of management a reaction. In order to leave less than 26 bars, permission of main engineer is required, however already on this time their amount less required.01-00Power rise to 200 MW(t)01-03In the left sleeve of the cooling system an additional pump is plugged for multiplying the stream of water to the kernel (included in the program of test)01-07An additional pump is plugged in the right sleeve of the cooling system (included in the program of test). Additional pumps deleted warmly from a kernel quick. A water level diminished in a steam delimiter01-15An operator deactivated the system of disconnecting of reactor at low pressure of steam01-18An operator multiplied the stream of water01-19Some bars of management are cleaned, to soup up and heave up a temperature and pressure in a steam delimiter. Rules do not allow to abandon less than 15 bars of management, however on this moment them it was, probably, only eight01-21-40The stream of water is diminished to the level subnormal in order to stabilize a water level in a steam delimiter and decrease deleting of warmth from a kernel01-22-10Formation of steam began in a kernel01-22-45In spite of the got warnings about an emergency situation, the state of reactor was stable01-23-10The automatic bars of management clean up from a kernel01-23-21Formation of steam increases sharply. It must result in increasing power01-23-35The amount of steam in a kernel begins to be increased uncontrolledly01-23-40The emergency button is pushed. The automatic bars of management are returned into the kernel01-23-44Reactor power exceeded nominal in 100 times01-23-45The reaction of fuel with cooling water makes the impulse of high pressure in the channels of fuels01-23-49Fuel tanks are destroyed01-24Two explosions happened. They blew off the roof of reactor, opening access air which was instrumental in formation of inflammable gas and caused a fireTo the picture of Area of alienation, Chernobyl Nuclear Power Plant, Chernobyl and Pripyat after 2000.