Reactor 4 Incident Analysis

The transcript describes the catastrophic events leading to the Chernobyl disaster. Control rods in the reactor were fixed, causing an uncontrollable reaction. The reactor lid was displaced, leading to an explosion. Energy surged beyond safe levels, and pressure built up, culminating in a disaster. The control room was unaware that the shutdown button could act as a detonator, completing the chain of events.

What was the state of the graphite tips in the control rods?

• They were moving freely.

• They were fixed in position.

• They were removed.

• They were partially movable.

At what time did the reactor's steel lid become visibly affected?

• 1:23:42

• 1:23:44

• 1:23:45

• 1:23:46

What was the designed operational power of Reactor 4?

• 3,000 megawatts

• 3,200 megawatts

• 33,000 megawatts

• 32,000 megawatts

What caused the final explosion in Reactor 4?

• Oxygen combining with hydrogen

• A fire in the reactor core

• A sudden increase in pressure

• A malfunction in the control rods

What was the final power reading of Reactor 4 before the explosion?

• 30,000 megawatts

• 32,000 megawatts

• 33,000 megawatts

• 3,200 megawatts

What did the control room personnel not know about the shutdown button?

• It could increase the reactor's power.

• It could slow down the reaction.

• It could act as a detonator.

• It could stop the reaction immediately.

What was the immediate effect when the reactor's lid detached?

• The reactor cooled down.

• The reaction stopped.

• Oxygen rushed in and combined with hydrogen.

• The control rods were reinserted.