How is radioactive dating harmful

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A meltdown is an accident in which severe overheating of the nuclear reactor results in the melting of the reactor's core.A meltdown could occur if there was a defect in the cooling system of the reactor that allowed one or more of the nuclear fuel elements to exceed its melting point.The isotope U-235 is important because it can be used in the nuclear fission chain reaction to create a lot of energy.Unlike the uranium used in a nuclear bomb, which is about 90% enriched with the isotope U-235, the uranium used in a nuclear reactor is only slightly enriched, to about four or five percent.

Also, the chain reaction within the core of a nuclear reactor is controlled by control rods that absorb neutrons to control the rate of reaction.Radiation sickness is defined as illness caused by exposure to a large dose of radiation over a short period of time.Symptoms may include skin burns, nausea, vomiting, diarrhea, hair loss, general weakness and possibly death.It is interesting to note that we are exposed to radiation naturally just by living our lives.Natural background radiation comes from outer space, and even radiates up from the ground below us.

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