Comment marche la fission nucléaire?

Lorsqu’un neutron est absorbé par le noyau d’uranium 235, il se produit un phénomène appelé la fission nucléaire induite. À ce moment, d’autres neutrons sont libérés. Ils sont de nouveau capturés par les noyaux atomiques des produits de fission, ce qui crée une réaction en chaîne continue.

Quelle est la différence entre la fusion et la fission nucléaire?

Bien que l’énergie soit libérée pendant les réactions de fission et de fusion, la principale différence est que la fission est le processus de division d’un atome en deux particules ou quelques particules plus légères et la fusion est la fusion de deux atomes ou plus petites particules pour en former un plus grand.

Is nuclear fusion more dangerous then nuclear fission?

Nuclear fusion is safer than nuclear fission. Whereas a fission reactor has about ten years worth of fuel in it, gradually growing more and more toxic over time. So the amount that can be released in a most catastrophic imaginable accident is huge. Secondly, the products of fusion are few and safe.

What happens during a nuclear fission?

While coal-powered plants burn fossil fuels, nuclear-powered plants depend on the heat that occurs during nuclear fission, when one atom splits into two and releases energy. Nuclear fission happens naturally every day. Uranium, for example, constantly undergoes spontaneous fission at a very slow rate.

What are facts about nuclear fusion?

It’s Star Power. Fusion energy is what powers our Sun and the stars. It’s Clean. Controlling Plasma is the Key. Goal: The Burning Plasma. The Fuel is Almost Limitless. ITER: A Massive Experiment in France. ITER is Expensive. Fusion Costs Depend on Component Durability. Fusion’s Competitiveness is Uncertain. Fusion and Fission.

Which elements can be used in nuclear fission?

Uranium and plutonium are most commonly used for fission reactions in nuclear power reactors because they are easy to initiate and control. The energy released by fission in these reactors heats water into steam.