the test begins

The actual test begins at 1 hr 23 min 4 s. The steam supply valves to the turbine are closed , increasing the pressure in the primary circuit. The diesel generators are started and reach their rated power at 1 hr 23 min 43 s. During this time, power for the pumps was provided by the inertia of the turbo-generators. The flow of water passing through the reactor decreased as the speed of the turbo-generators dropped, which caused bubbles to form in the coolant. The water flow through the reactor decreased as the speed of the turbo-generators dropped, which caused bubbles to form in the coolant.

The water flow through the reactor decreased as the speed of the turbo-generators dropped. Because of the positive void coefficient, the reactor enters into a positive feedback (amplifying the process involved), leading to a rapid increase in the power of the reactor.

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