25-08-2017, 09:32 PM
NUCLEAR POWER STATION
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Definition
• Def : A generating station which converts heat
energy produced by nuclear materials to
l i l
Definition
electrical energy.
• Kakrapar ‐ 440 MW
Nuclear Power Station
• The nuclear reactor is fueled by uranium dioxide and
moderated by water.
• The nuclear reaction produces heat. The reaction is
t ll db t ll d d
controlled by controlled rods.
• The coolant pump drives water through the reactor,
where the nuclear reaction increases the coolant (in
most cases water) temperature.
• The steam is generated in the heat exchanger/boiler.
• The high pressure steam drives the turbine, which in
turn drives the generator. (usually at 1800 rpm)
• The condenser condenses the steam to water, which
is pumped back into the Heat exchanger.
What is a chain reaction?
•Suppose we take a really heavy atom—a stable kind of
uranium called uranium‐235.
•Each of its atoms has a nucleus with 92 protons and 143
neutrons.
•Fire a neutron at uranium‐235 and you turn it into uranium‐
236: an unstable version of the same atom (a radioactive
isotope of uranium) with 92 protons and 144 neutrons
(remember that you fired an extra one in).