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What explains why chain reactions do not take place in pure natural uranium?

Hewitt CP9 33 q0 points What explains why chain reactions do not take place in pure natural uranium? There is usually not enough uranium localized in one place to overcome critical mass.

Why will nuclear fission probably not be used directly for powering automobiles?

Why will nuclear fission probably not be used directly for powering automobiles? A lot of the energy created by nuclear fission is uncontrollable, and there is far too much energy produced which would cause other problems such as melting the car for instance.

How does uranium 235 undergo fission during a chain reaction?

When a free neutron hits the nucleus of a fissile atom like uranium-235 (235U), the uranium splits into two smaller atoms called fission fragments, plus more neutrons. Fission can be self-sustaining because it produces more neutrons with the speed required to cause new fissions. This creates the chain reaction.

Is a chain reaction more likely to occur in two separate pieces of uranium 235 or in the same two pieces stuck together?

Uranium atoms fission easily. Is a chain reaction more likely to occur in two separate pieces of uranium-235 or i the same pieces stuck together? A chain reaction is more likely to occur in the same piece stuck together. The number of neutrons available for fission is controlled by rods inserted into the reactor.

How hot does it have to be for nuclear fusion?

about 100 million Kelvin

Can a nuclear power plant explode like an atomic bomb?

While a nuclear reactor can never explode like an atomic bomb, an explosion can still occur. All power plants are a potential site for an explosion, because the fuel used, whether it is coal, uranium, or natural gas, needs to be energy dense. The destruction at Chernobyl was caused by a steam explosion.

Why can a nuclear reactor not explode like a bomb?

Fortunately, the reactor cannot explode. A nuclear explosion cannot occur because the fuel is not compact enough to allow an uncontrolled chain reaction. The MIT reactor has a lot of water and core structural materials that slow the neutrons down before they reach other fissile atoms.

What happens if a nuclear plant blows up?

What happens when there is a nuclear power plant accident? A nuclear power plant uses uranium fuel to produce steam for generating electricity. If a nuclear power plant accident occurs, heat and pressure build up, and the steam, along with the radioactive materials, may be released.

How often do nuclear meltdowns occur?

Using simple statistics, the probability of a core-melt accident within 1 year of reactor operation is 4 in 14,816 reactor years, or 1 in 3704 reactor years.

Can you visit the elephant’s foot?

Chernobyl’s control room opens to tourists — but visitors can’t stay longer than five minutes. Tourists can now visit the infamous radioactive control room at Chernobyl for the first time since the catastrophe took place more than three decades ago.