According to the International Atomic Energy Agency, On April 26, 1986, the Number Four RBMK reactor at the nuclear power plant at Chernobyl, Ukraine, went
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According to the International Atomic Energy Agency,
On April 26, 1986, the Number Four RBMK reactor at the nuclear power plant at Chernobyl, Ukraine, went out of control during a test at low-power, leading to an explosion and fire that demolished the reactor building and released large amounts of radiation into the atmosphere. Safety measures were ignored, the uranium fuel in the reactor overheated and melted through the protective barriers. RBMK reactors do not have what is known as a containment structure, a concrete and steel dome over the reactor itself designed to keep radiation inside the plant in the event of such an accident. Consequently, radioactive elements including plutonium, iodine, strontium and caesium were scattered over a wide area. In addition, the graphite blocks used as a moderating material in the RBMK caught fire at high temperature as air entered the reactor core, which contributed to emission of radioactive materials into the environment.
There were over 100 radioactive elements released into the atmosphere when Chernobyl’s fourth reactor exploded. Most of these were short lived and decayed (reduced in radioactivity) very quickly. One of the most dangerous radioactive elements released by the explosion was Caesium-137, which has a half-life of 29 years.
Determine how many years are required for amount of Caesium-137 released by Reactor Four at Chernobyl to be reduced by 98.3%. Round the solution to the nearest whole number.
years are required for the original amount of Caesium-137 released by Reactor 4 at Chernobyl in 1986 to be reduced by 98.3% of its original level.
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