Radiological Emergency Management Independent Study Course3-16After TMI, the nuclear power plants have expanded their operator training programs. Plants have alsomodified their control room indicators, and have modified some plant equipment to prevent other accidentsfrom occurring.Another serious commercial power reactor accident occurred at the Chernobyl nuclear power plant inthe Soviet Union. At Chernobyl, on April 26,1986, a nuclear power plant accident released large amountsof radioactive fission products to the environment.The Chernobyl accident was caused by a combination of errors, deliberate failure to follow procedureand a poor design. The design of the Chernobyl reactor resulted in a very rapid increase in power after thewater used to cool the core was lost. As a result, the pressure increased to the point that the reactor wasblown apart. Such an accident is impossible at a U.S. PWR or BWR. In PWRs or BWRs, such a loss ofwater would have shut down the reactor.Thirty-one people, all of whom were onsite emergency response personnel, died as a result of the
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