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Why is the moderator important in a nuclear reactor?
The moderator is used to slow down the neutrons present in the core of the reactor. Normally the neutrons produced as the nuclear fuel (e.g. uranium) is fissioned are travelling too fast to produce a sustained chain reaction. Some examples of moderators are cadmium, heavy water and graphite.
In nuclear reactor heavy water is used as?
Heavy water (deuterium) functions as a moderator. It slows down fast neutrons released by fission reactions in order to allow the reaction to be sustained. Fast neutrons pass through the reactor before initiating another fission reaction.
Which elements are used for nuclear reactors in India?
Uranium. There is some interest in using thorium in the future. Thorium cannot be used directly as fuel in a reactor as it does not fission, it requires a fast breeder reactor to convert it to Uranium-233 which does fission.
Why is moderator not required in modern fast reactors?
a moderator would slow the neutrons, hindering breeding
What is difference between moderator and coolant of nuclear reactor?
The control rods absorb the nuetrons which keeps the reaction rate relatively constant (rather than letting it grow exponentially). They create a situation where roughly one neutron per fission goes on to split another atom. Moderators slow down the neutrons. Fast neutrons are more inclined to bounce/deflect off of the surface of a nucleus so slower neutrons actually lead to a greater number of succesful fissions i.e. moderators don't slow the reaction down, they just help it to take place.
Does a breeder nuclear reactor use moderator?
Thermal Breeder Reactors use moderators but Fast Breeder Reactors don't use moderator.
What is the coolant used in kalpakkam power station in India?
Kalpakkam has both Thermal reactor (Madras Atomic Power Station) and Fast Breeder Reactor -FBTR and PFBR (Under construction). In MAPS (thermal reactor) it is Heavy Water (D2O) Which acts as a coolant as well as moderator, where as in Fast Breeder Test Reactor (FBTR) and Prototype Fast Breeder Reactor (PFBR) Sodium (Na) is used as coolant. Since there should not any moderators for fast reactors D2O will not be used as coolant in fast reactors.
What is a FBB reactor?
You may mean FBR - this stands for Fast Breeder Reactor
What is UK 's first fast breeder reactor in Scotland called?
Dounreay PFR (Prototype Fast Reactor)
Can a reactor without moderator is present?
Yes, they are fast nuclear reactors
Fast breeder reactor in India?
See the India section of www.world-nuclear.org
What are disadvantages of fast breeder reactor?
The main disadvantage is the positive temperature coefficient of reactivity.
Which type of pump is used to pump liquid metal in fast breeder reactor?
GEAR
In Oct2004 where did the prime minister of India inaugurate the prototype fast breeder reactor?
KalpakkamKalpakkam
What reactors produces heat and a new supply of the radioactive isotope Pu-239?
A type of reactor called a "Fast Breeder" reactor.
In october 2004 where did the prime minister of India inaugrate the prototype fast breeder reactor?
kalapakkam
In October 2004 where did the Prime Minister of India inaugurate the prototype fast breeder reactor?
Kalpakkam
