BACCALAUREAT GENERAL ET TECHNOLOGIQUE SESSION 201X
Questions: Note: present the documents as you want or you can use the following questions as a guide. 1. Explain how a nuclear power plant works. 2. Present ...
BACCALAUREAT GENERAL ET TECHNOLOGIQUE SESSION 201X ÉPREUVE SPECIFIQUE MENTION « SECTION EUROPEENNE » Académie de Paris-Créteil-Versailles
ANGLAIS Baccalauréat STI GENIE ENERGETIQUE/ELETROTECHNIQUE
Sujet n°Y
THE NUCLEAR POWER PLANT
Sujet n°Y
The Nuclear Power Plant
Page 1 sur 2
Presentation In order to turn nuclear fission into electrical energy, nuclear power plant operators have to control the energy given off by the enriched uranium and allow it to heat water into steam. The steam engine In order to turn nuclear fission into electrical energy, nuclear power plant operators have to control the energy given off by the enriched uranium and allow it to heat water into steam. Enriched uranium typically is formed into inch‐long (2.5‐ centimeter‐long) pellets, each with approximately the same diameter as a dime. Next, the pellets are arranged into long rods, and the rods are collected together into bundles. The bundles are submerged in water inside a pressure vessel. The water acts as a coolant. Left to its own devices, the uranium would eventually overheat and melt. To prevent overheating, control rods made of a material that absorbs neutrons are inserted into the uranium bundle using a mechanism that can raise or lower them. Raising and lowering the control rods allow operators to control the rate of the nuclear reaction. When an operator wants the uranium core to produce more heat, the control rods are lifted out of the uranium bundle (thus absorbing fewer neutrons). To reduce heat, they are lowered into the uranium bundle. The rods can also be lowered completely into the uranium bundle to shut the reactor down in the event of an accident or to change the fuel. The uranium bundle acts as an extremely high‐energy source of heat. It heats the water and turns it to steam. The steam drives a turbine, which spins a generator to produce power.
Questions: Note: present the documents as you want or you can use the following questions as a guide. 1. 2.
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