http___livro-ensino-medio.f1cf.com.br_fisica_hr_physics-156.html_1.xml
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"They are thermal plants that use heat produced in nuclear fission (is the 'breaking' breaking of the atom, it absorbs a neutronbecomes unstable and then splits releasing large amounts of energy) to move water vapor, which turn drives the turbines which produce electricity. In a power reactor of the PWR type (term, in English, for pressurized water reactor), as the reactors used in Brazil, the fuel is enriched uranium about 3.5%. This means that the uranium found in nature, which contains only 0.7% of the isotope U shall be processed ('enriched') so that this ratio reaches 3.5% ... while the construction of a nuclear this same element to be enriched to a level higher than 90%. (Adapted from: Gonçalves, OD, Ivan A. PS. Nuclear Energy, In: SCIENCE TODAY - October, 2005) The figure below shows the sequence of the process of fission of a nucleus of a uranium atom. ACTIVITY Write an essay on the production of electricity in Brazil through hydroelectric and nuclear power plants, including the following topics: Risks and safety procedures that should be taken into account; Existence of available source; Final cost of kwh; Environmental damages, if any. Rather early discovery of elements Radioactive ... Wilhelm Röntgen(1845-1923), German physicist, noted for his experiments in 1895, what he called "penetrating rays", which were produced in glass bulb by electric effect, because crossing meats, but not crossing solid materials as bone. In continuation of his experiences,called the X-raySoon the discovery became famous, and in 1896, the French physicist Henri Becquerel(1852-1908) discovered rays emitted naturally from a piece of uranium. Generation Transformation equal to Energy Conservation
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"Oni su termoelektrane koje koriste toplinu proizvedenu u nuklearne fisije (je 'razbijanje' razbijanje atoma, on apsorbira neutronpostaje nestabilan, a zatim dijeli ispuštanje velike količine energije) za kretanje vodene pare, koja red pokreće turbine koje proizvode električnu energiju. U snage reaktora PWR tipa (pojam, na engleskom jeziku, za tlakom vode reaktora), jer su reaktori koriste u Brazilu, gorivo je obogaćen uran oko 3,5%. To znači da je uran naći u prirodi, koji sadrži samo 0,7%U-235 izotopa treba obraditi ('obogaćeni'), tako da je taj omjer dosegne 3,5% ... a izgradnja nuklearnog taj isti element koji se obogaćen na razini višoj od 90%. (Preuzeto iz: Gonçalves, OD, Ivan A. PS nuklearnu energiju, u:. Znanosti danas - listopad, 2005) Donja slika prikazuje slijed procesa fisije od jezgre atoma urana. AKTIVNOST Napišite esej o proizvodnji električne energije u Brazilu kroz hidro i nuklearne elektrane, uključujući i sljedeće teme: Rizici i sigurnosne procedure koje treba uzeti u obzir; Postojanje dostupnih izvora; Konačna cijena kWh; Radni štete, ako ih ima. Umjesto rano otkrivanje elemenata Radioaktivni ... Wilhelm Röntgen(1845-1923), njemački fizičar, poznat po svojim eksperimentima u 1895, što je nazvao "prodorne zrake", koji su proizvedeni u staklu žarulju električni učinak, jer je prijelaz meso, ali ne prelaze krutog materijala kao kost. U nastavku svojih iskustava,nazvao X-zraka Uskoro otkrića postao poznat, a 1896, francuski fizičar Henri Becquerel(1852-1908) otkrio zrake koje emitira, naravno iz komad urana.