Презентация, доклад по английскому языку на тему Environment pollutions

A.
Учитель:
Шамаева Ольга Владимировна

2016 год

are harmful to the environment.
But the most dangerous of them is NPP-Nuclear power plants
NPP-nuclear power plant, where the nuclear energy released in a nuclear reactor is converted into electrical energy
but when they explode, they become even more dangerous

radioactive products into the environment. It leads to the radiation pollution of air, water, soil, and consequently exposure of personnel to the object, and in some cases the population. Thus from nuclear reactors released into the atmosphere of radioactive materials in the form of tiny particles of dust and aerosols. Liquid spill can occur, leading to radioactive contamination of the terrain, bodies of water.

The effects of radiation accidents

unit of the Chernobyl nuclear power plant situated on the territory of the Ukrainian SSR (now - Ukraine). The destruction was of the explosive nature of the reactor was completely destroyed, and the environment were released large quantities of radioactive substances. The accident is regarded as the largest of its kind in the history of nuclear power, both on the estimated number of dead and injured from the consequences of its people and economic damage. During the first three months after the accident killed 31 people; long-term effects of radiation, revealed over the next 15 years, caused the death of between 60 and 80 . 134 people suffered radiation sickness varying degrees of severity. More than 115 thousand. People from the 30-km zone were evacuated. To eliminate the consequences were mobilized considerable resources, more than 600 thousand. People involved in the accident

Chernobyl Nuclear Power Plant

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the US created the atomic bomb on tritium, a complex of converted for the production of tritium for the needs of the UK. For this, the reactor had to be operated at higher temperatures than those for which it was originally designed. As a result, October 10, 1957 there was a fire. First, the operators do not want to put out the reactor with water because of a bomb threat, but eventually gave up and sank it. A huge number of radiation contaminated water into the environment. In 2007, studies showed that more than two hundred residents of the surrounding areas developed cancer.Nuclear power plant in Windscale stopped and closed.

The fire at the Windscale nuclear plant.

Three Mile Island was considered the largest in the history of nuclear power. The incident occurred on March 28, 1979 in Pennsylvania. The cooling system did not work, and it caused a partial meltdown of nuclear reactor fuel elements. Fortunately, a complete meltdown was avoided, and the catastrophe did not happen. But in spite of a favorable outcome, the consequences of the accident for the US nuclear industry have been enormous. Melting has led to an increase in the radiation background at the station. Victims among the population was not, but 140 thousand people were forced to flee their homes. Consequences of the accident eliminated in 1993, after 14 years. The accident has forced many Americans to reconsider their opinions about the use of nuclear energy. As a result, the construction of new nuclear power stations has been frozen for 13 years.

units were stopped by the emergency protection. But after an hour electricity supply was interrupted, presumably because of the tsunami that followed the earthquake. This caused the malfunction of systems of normal and emergency cooling and led to a meltdown of the reactor core at power. At the station there was an explosion, which led to the release of significant amounts of radioactive substances into the atmosphere. To protect residents from huge releases of radioactive substances, all local residents were evacuated within a radius of twenty kilometers.

for attention!